Can Mercedes Keys Be Reprogrammed? The Ultimate Guide

Can Mercedes Keys Be Reprogrammed? Absolutely. If you’re grappling with a Mercedes key that’s stopped working, CARDIAGTECH.NET offers solutions. Understanding the ins and outs of Mercedes key reprogramming can save you time and money. Let’s explore methods, costs, and expert insights to ensure you regain access to your vehicle swiftly and efficiently.

1. Understanding Mercedes Key Reprogramming

Mercedes-Benz keys, renowned for their security and sophistication, sometimes require reprogramming. This necessity can arise from battery changes, synchronization issues, or electronic glitches. Knowing when and how to address these issues is crucial for Mercedes owners.

1.1. Why Mercedes Keys Need Reprogramming

Several scenarios can lead to the need for Mercedes key reprogramming:

Battery Replacement: Changing the battery in your Mercedes key fob can sometimes disrupt its programming, necessitating a reset.
Synchronization Problems: The key’s signal might become out of sync with the vehicle’s system, preventing it from unlocking or starting the car.
Electronic Malfunctions: Like any electronic device, key fobs can experience malfunctions that require reprogramming.
Key Replacement: When a key is lost or stolen, a new key needs to be programmed to the vehicle’s system.

1.2. Common Symptoms Indicating a Need for Reprogramming

Recognizing the symptoms that indicate your Mercedes key needs reprogramming can save you from being stranded. Here are some common signs:

The key fob does not unlock or lock the doors.
The key does not start the ignition.
The car displays a “key not recognized” error message.
The key functions intermittently.

1.3. Mercedes Key Types and Their Reprogramming Needs

Mercedes-Benz uses various key types, each with its specific reprogramming requirements.

Key Type	Description	Reprogramming Needs
Chrome Key	The standard Mercedes key, featuring a chrome finish and remote functions.	Requires reprogramming after battery replacement or synchronization issues. Often done using diagnostic tools.
Smart Key/Keyless Go	Offers keyless entry and start functions, allowing you to unlock and start the car without physically using the key.	More complex reprogramming due to advanced security features. May require dealer intervention or specialized equipment from CARDIAGTECH.NET.
Valet Key	A limited-function key that can start the car but not open the glove compartment or trunk.	Reprogramming is similar to the chrome key but with limited access. Useful in scenarios where you want to restrict access to certain parts of the vehicle.
Emergency Key	A basic key that can manually unlock the door and start the ignition.	Usually doesn’t require reprogramming unless it’s part of a key set being programmed to a new vehicle. Primarily used as a backup in case of electronic failure.
Digital Key	Uses a smartphone app to lock, unlock, and start the car. Allows for remote access and sharing of vehicle access with others. Available for newer models.	Setup and pairing with the vehicle are done through the Mercedes Me app. Reprogramming might involve re-syncing the app with the car’s system if there are connectivity issues. Requires software and internet connection.
FBS4 Key	Newer key system introduced around 2015-2017, featuring enhanced security.	More challenging to reprogram due to increased security measures. Often requires advanced diagnostic tools and expertise.
FBS3 Key	Older key system used in models before 2015, also highly secure.	Still requires specialized equipment but is generally more accessible for reprogramming than FBS4 keys.

Understanding these differences can help you choose the right approach and tools, like those available at CARDIAGTECH.NET, for reprogramming your Mercedes key.

2. Step-by-Step Guide to Reprogramming a Mercedes Key

While some Mercedes key reprogramming tasks require professional equipment, certain synchronization steps can be done at home. Here’s a step-by-step guide:

2.1. Initial Synchronization Attempt

This method is useful when the key has simply lost synchronization with the car.

Insert the Key: Place the key in the ignition.
Turn to Position 2: Turn the key to the “on” position (position 2), but do not start the engine.
Turn Back and Remove: Turn the key back to position 0 (off) and remove it from the ignition.
Press and Hold Lock: Within 60 seconds, press and hold the “lock” button on the key fob.
Press Unlock Five Times: While holding the “lock” button, press the “unlock” button five times.
Test Functionality: Check if the key now locks and unlocks the car remotely.

2.2. Addressing Non-Starting Issues

If the key unlocks the car but doesn’t start the engine, try the following:

Insert and Turn: Insert the key into the ignition and turn it to position 2.
Wait: Leave the key in this position for a few minutes (e.g., 90 minutes as suggested in some forums). This allows the car to re-establish communication with the key.
Attempt Start: Try starting the engine.

2.3. When to Seek Professional Help

If the above steps do not work, it’s time to seek professional help. Factors indicating the need for a professional include:

Repeated failures after multiple attempts.
Error messages persist on the dashboard.
You lack the necessary diagnostic tools.

For advanced diagnostic tools, consider exploring options at CARDIAGTECH.NET.

3. Tools and Equipment for Mercedes Key Reprogramming

Reprogramming Mercedes keys often requires specialized tools. Here are some essential tools and equipment:

3.1. Key Programmers

Key programmers are devices that can read, write, and program key data. These tools are essential for more complex reprogramming tasks.

Functionality: Reads data from the car’s immobilizer system and programs the key accordingly.
Brands: Popular brands include Autel, Xhorse, and CGDI.
Where to Buy: CARDIAGTECH.NET offers a range of key programmers suitable for various Mercedes models.

3.2. Diagnostic Scanners

Diagnostic scanners help identify issues preventing the key from working correctly.

Functionality: Reads fault codes from the car’s computer, providing insights into the problem.
Features: Should support Mercedes-specific diagnostic protocols.
Advanced Scanners: Offer advanced functions such as ECU programming and immobilizer coding.

3.3. EIS/ESL Tools

EIS (Electronic Ignition Switch) and ESL (Electronic Steering Lock) tools are critical for diagnosing and repairing issues related to these components.

Functionality: Tests and repairs EIS and ESL modules, which are common failure points in Mercedes vehicles.
Capabilities: Can read EIS data, simulate key signals, and unlock ESL modules.

3.4. Software Requirements

Reprogramming often requires specialized software that is compatible with your diagnostic tools.

Mercedes-Benz Diagnostic Software: Such as XENTRY/DAS, which provides comprehensive diagnostic and programming capabilities.
Third-Party Software: Some key programmers come with their own software for key generation and programming.

3.5. Comparison Table of Essential Tools

Tool	Function	Key Features	Average Cost	Best Place to Buy
Key Programmer	Programs new keys and reprograms existing ones	Supports multiple Mercedes models, user-friendly interface	$500 – $2,000	CARDIAGTECH.NET
Diagnostic Scanner	Reads fault codes and diagnoses issues	Mercedes-specific diagnostics, live data streaming, ECU programming	$300 – $1,500	CARDIAGTECH.NET
EIS/ESL Tool	Tests and repairs EIS and ESL modules	Reads EIS data, simulates key signals, unlocks ESL modules	$400 – $1,000	Specialized Auto Tool Suppliers
Mercedes-Benz XENTRY/DAS	Comprehensive diagnostic and programming software	Full diagnostic capabilities, ECU programming, key programming	Subscription Based	Official Mercedes Dealers
Battery Tester	Checks the health of the key fob battery	Provides accurate voltage readings, essential for diagnosing key fob issues	$20 – $50	Local Auto Parts Store

4. The Reprogramming Process Explained

Understanding the reprogramming process can demystify what professionals do and help you appreciate the complexity involved.

4.1. Reading the Vehicle’s Data

The first step involves reading the vehicle’s data using a diagnostic tool.

Connection: Connect the diagnostic tool to the car’s OBD-II port.
Data Retrieval: The tool retrieves critical data from the car’s immobilizer system, including the vehicle identification number (VIN), immobilizer code, and key data.

4.2. Key Generation

Once the data is retrieved, a new key code is generated.

Software Use: Key programming software is used to generate a new key code that matches the vehicle’s immobilizer system.
Data Input: This process often requires inputting specific information, such as the VIN and immobilizer code.

4.3. Programming the Key

The final step involves programming the new key to the vehicle.

Writing Data: The new key code is written to the key fob using the key programmer.
Synchronization: The key is then synchronized with the car’s immobilizer system.
Testing: The key’s functionality is tested to ensure it can lock/unlock the doors and start the engine.

4.4. Step-by-Step Reprogramming using a Key Programmer

Here is a detailed step-by-step guide using a key programmer, which you can find at CARDIAGTECH.NET:

Connect the Programmer: Connect the key programmer to the vehicle’s OBD-II port.
Power On: Turn on the vehicle’s ignition.
Identify the Car: Use the programmer to identify the vehicle model and year.
Read Key Data: Select the “Read Key Data” option on the programmer.
Insert the Key: Insert the key to be programmed into the programmer.
Program the Key: Select the “Program Key” option and follow the on-screen instructions.
Test the Key: Once programming is complete, test the key by locking and unlocking the doors, and starting the engine.

5. Costs Associated with Mercedes Key Reprogramming

The cost of reprogramming a Mercedes key can vary widely based on several factors.

5.1. Factors Affecting the Cost

Type of Key: Smart keys or keyless-go keys typically cost more to reprogram than standard keys.
Complexity of Programming: Advanced security systems may require more complex programming, increasing the cost.
Service Provider: Dealerships usually charge more than independent repair shops.
Diagnostic Fees: If the issue requires extensive diagnostics, additional fees may apply.

5.2. Average Costs at Dealerships

Reprogramming Fee: $100 – $300
New Key Cost: $200 – $500
Total Cost: $300 – $800

5.3. Average Costs at Independent Repair Shops

Reprogramming Fee: $75 – $250
New Key Cost: $150 – $400
Total Cost: $225 – $650

5.4. Potential Additional Costs

Towing Fees: If the car needs to be towed to the service location.
Diagnostic Fees: For extensive troubleshooting.
Emergency Service Fees: For after-hours or weekend service.

5.5. Cost-Saving Tips

Shop Around: Get quotes from multiple dealerships and independent repair shops.
Consider a Refurbished Key: If appropriate, a refurbished key can be a cost-effective alternative.
DIY Options: If you have the right tools, you can attempt some basic reprogramming tasks yourself.

6. Common Issues and Troubleshooting Tips

Even with the right tools and knowledge, you may encounter issues during the reprogramming process. Here are some common problems and troubleshooting tips:

6.1. Key Not Recognized After Programming

Cause: Synchronization issues, incorrect programming, or a faulty key.
Troubleshooting:
- Re-attempt the synchronization process.
- Ensure the key is correctly programmed with the vehicle’s data.
- Check the key for physical damage or a dead battery.

6.2. EIS/ESL Problems

Cause: Failure of the electronic ignition switch or electronic steering lock.
Troubleshooting:
- Use an EIS/ESL testing tool to diagnose the issue.
- Check for error codes related to the EIS/ESL system.
- Consider replacing the faulty component.

6.3. Software Glitches

Cause: Software bugs, compatibility issues, or corrupted data.
Troubleshooting:
- Ensure you are using the latest version of the programming software.
- Reinstall the software or try a different computer.
- Check for compatibility issues between the software and your diagnostic tool.

6.4. Immobilizer Problems

Cause: Issues with the car’s immobilizer system, preventing the key from being recognized.
Troubleshooting:
- Check for error codes related to the immobilizer system.
- Ensure the immobilizer is properly configured.
- Consider resetting the immobilizer system.

6.5. Addressing Common Errors

Error Code	Description	Possible Solutions
“Key Not Recognized”	The car does not recognize the key.	Re-synchronize the key, check the battery, ensure correct programming.
“EIS Malfunction”	Indicates a problem with the electronic ignition switch.	Test the EIS module, check for physical damage, consider replacement.
“ESL Locked”	The electronic steering lock is locked.	Use an ESL unlocking tool, check for error codes, ensure proper voltage supply.
“Immobilizer Active”	The immobilizer system is preventing the car from starting.	Check immobilizer settings, ensure the key is correctly programmed, reset the immobilizer system.
“CAN Bus Communication Error”	Communication error on the CAN bus network.	Check wiring and connections, ensure all modules are properly connected, diagnose the CAN bus system with a diagnostic tool.

7. Preventative Measures to Avoid Key Reprogramming

Taking preventative measures can help you avoid the need for frequent key reprogramming.

7.1. Battery Maintenance

Regular Checks: Check the key fob battery regularly and replace it when it’s low.
Quality Batteries: Use high-quality batteries to ensure consistent performance.
Timely Replacement: Replace the battery as soon as you receive a low battery warning.

7.2. Proper Key Handling

Avoid Damage: Protect the key from physical damage, such as dropping it or exposing it to moisture.
Storage: Store the key in a safe place away from extreme temperatures and direct sunlight.

7.3. Regular Vehicle Maintenance

Diagnostic Scans: Perform regular diagnostic scans to identify and address potential issues early.
Software Updates: Keep the car’s software updated to ensure compatibility and optimal performance.

7.4. Synchronization Practices

Periodic Synchronization: Periodically synchronize the key with the vehicle to maintain a strong connection.
Follow Procedures: Follow the correct synchronization procedures outlined in the owner’s manual.

7.5. Best Practices Checklist

Prevention Measure	Description	Frequency	Importance
Battery Checks	Check the key fob battery regularly and replace it when it’s low.	Every 6 months	High
Proper Handling	Protect the key from physical damage and store it in a safe place.	Daily	High
Diagnostic Scans	Perform regular diagnostic scans to identify potential issues early.	Annually	Medium
Software Updates	Keep the car’s software updated to ensure compatibility and optimal performance.	As needed	Medium
Synchronization	Periodically synchronize the key with the vehicle to maintain a strong connection.	As needed	Medium

8. Choosing the Right Service Provider

When professional help is needed, selecting the right service provider is crucial.

8.1. Dealership vs. Independent Repair Shop

Dealership:
- Pros: Access to factory-trained technicians, genuine parts, and specialized diagnostic equipment.
- Cons: Higher costs, longer wait times.
Independent Repair Shop:
- Pros: Lower costs, more personalized service, quicker turnaround times.
- Cons: May lack specialized equipment, technicians may not be factory-trained.

8.2. Key Considerations When Choosing a Service Provider

Experience: Look for a service provider with extensive experience in Mercedes key programming.
Equipment: Ensure they have the necessary diagnostic and programming tools.
Reputation: Check online reviews and ask for referrals.
Warranty: Inquire about warranties on parts and labor.

8.3. Questions to Ask Potential Service Providers

What is your experience with Mercedes key programming?
What diagnostic tools do you use?
Can you provide a detailed estimate of the cost?
Do you offer a warranty on your work?
How long will the reprogramming process take?

8.4. Checklist for Selecting a Service Provider

Criteria	Questions to Ask	Importance
Experience	How many years have you been working on Mercedes vehicles? Do you specialize in key programming?	High
Equipment	Do you have Mercedes-specific diagnostic and programming tools? Are your tools up-to-date?	High
Cost	Can you provide a detailed estimate of all costs involved? Are there any potential additional fees?	High
Warranty	Do you offer a warranty on parts and labor? What does the warranty cover?	Medium
Turnaround Time	How long will the reprogramming process take? Can you provide a timeline?	Medium
Reputation	Can you provide references or online reviews? Are you certified by any automotive organizations?	Medium
Customer Service	How responsive are you to questions and concerns? Do you offer a loaner car or shuttle service?	Low
Location/Convenience	Is your shop conveniently located? What are your hours of operation?	Low

9. The Future of Mercedes Key Technology

Mercedes key technology continues to evolve, with new features and security measures being introduced regularly.

9.1. Advancements in Key Security

Biometric Authentication: Some newer models use biometric authentication, such as fingerprint scanners, to enhance key security.
Digital Keys: Mercedes is increasingly offering digital key options that allow you to use your smartphone as a key.
Over-the-Air Updates: Key software can now be updated over the air, improving security and functionality.

9.2. Integration with Smart Technology

Mercedes Me App: The Mercedes Me app allows you to remotely lock/unlock your car, start the engine, and monitor vehicle status.
Voice Control: Some models offer voice control integration, allowing you to control key functions with voice commands.

9.3. Potential Future Developments

AI-Powered Security: Artificial intelligence could be used to detect and prevent key theft and unauthorized access.
Blockchain Technology: Blockchain could be used to secure key data and prevent tampering.
Enhanced Keyless Entry: Future keyless entry systems may use advanced sensors and algorithms to improve security and convenience.

9.4. Keeping Up with Technological Changes

Regular Training: Stay informed about the latest key technology through regular training and certification programs.
Upgrade Equipment: Invest in the latest diagnostic and programming tools to keep up with technological changes.
Industry Publications: Subscribe to industry publications and attend conferences to stay informed about new developments.

10. Legal and Ethical Considerations

Reprogramming car keys involves legal and ethical considerations that must be taken seriously.

10.1. Legal Requirements

Proof of Ownership: Always require proof of ownership before reprogramming a key.
Licensing: Ensure you are properly licensed to perform key programming services.
Data Protection: Protect customer data and comply with privacy regulations.

10.2. Ethical Considerations

Legitimate Use: Only reprogram keys for legitimate purposes, such as replacing a lost or damaged key.
Transparency: Be transparent with customers about the reprogramming process and costs.
Security: Protect the security of the vehicle’s immobilizer system.

10.3. Avoiding Illegal Activities

Key Cloning: Avoid cloning keys without proper authorization.
Theft Prevention: Implement measures to prevent key theft and unauthorized access.
Compliance: Comply with all applicable laws and regulations.

10.4. Best Practices for Compliance

Compliance Area	Best Practices	Importance
Proof of Ownership	Always verify the customer’s ownership of the vehicle before providing key services.	High
Licensing	Ensure that all technicians are properly licensed and certified to perform key programming services.	High
Data Protection	Implement strict data protection measures to safeguard customer information and prevent unauthorized access.	High
Transparency	Provide clear and accurate information to customers about the services being provided and the associated costs.	Medium
Security	Implement security measures to protect the vehicle’s immobilizer system and prevent key theft or cloning.	Medium

11. Why Choose CARDIAGTECH.NET for Your Key Reprogramming Needs

At CARDIAGTECH.NET, we understand the complexities of Mercedes key reprogramming and offer a comprehensive range of solutions to meet your needs.

11.1. Extensive Range of Diagnostic Tools

We provide a wide selection of diagnostic tools specifically designed for Mercedes-Benz vehicles, ensuring accurate and efficient key programming.

11.2. Expert Support and Guidance

Our team of experienced technicians is available to provide expert support and guidance throughout the reprogramming process. We offer personalized assistance to help you choose the right tools and troubleshoot any issues you may encounter.

11.3. Competitive Pricing

We offer competitive pricing on all our products and services, ensuring you get the best value for your money. We also provide flexible payment options to suit your budget.

11.4. High-Quality Products

We only offer high-quality products from reputable brands, ensuring reliability and performance. Our diagnostic tools are rigorously tested to meet the highest standards.

11.5. Customer Satisfaction Guarantee

We are committed to customer satisfaction and offer a satisfaction guarantee on all our products and services. If you are not completely satisfied with your purchase, we will do everything we can to make it right.

Don’t let a malfunctioning key keep you from driving your Mercedes. Contact CARDIAGTECH.NET today at 276 Reock St, City of Orange, NJ 07050, United States, or call us on Whatsapp at +1 (641) 206-8880. Visit our website CARDIAGTECH.NET for more information and to explore our range of key programming solutions. Our expert team is ready to assist you with all your Mercedes key reprogramming needs.

12. Real-World Case Studies

Examining real-world case studies can provide valuable insights into the challenges and solutions involved in Mercedes key reprogramming.

12.1. Case Study 1: Key Fob Battery Replacement Issue

Problem: A Mercedes owner replaced the battery in their key fob, but the key stopped working.
Solution: The owner followed the initial synchronization steps outlined in Section 2.1, but the key still did not function. They then contacted CARDIAGTECH.NET, purchased a diagnostic scanner, and reprogrammed the key using the scanner, successfully restoring the key’s functionality.
Lesson Learned: Sometimes, a simple battery replacement can disrupt the key’s programming, requiring more advanced tools for reprogramming.

12.2. Case Study 2: EIS/ESL Failure

Problem: A Mercedes owner experienced a complete failure of the electronic ignition switch (EIS), preventing the car from starting.
Solution: The owner consulted with an independent repair shop equipped with EIS/ESL testing tools. The shop diagnosed the EIS failure, replaced the faulty component, and reprogrammed the key to work with the new EIS module.
Lesson Learned: EIS/ESL failures can be complex and require specialized tools and expertise.

12.3. Case Study 3: Lost Key Replacement

Problem: A Mercedes owner lost their key and needed a replacement.
Solution: The owner contacted a Mercedes dealership, provided proof of ownership, and ordered a new key. The dealership programmed the new key to the car’s immobilizer system.
Lesson Learned: Replacing a lost key requires proof of ownership and professional programming to ensure security.

12.4. Case Study 4: Digital Key Synchronization

Problem: A Mercedes owner experienced issues with their digital key, where the smartphone app would not unlock the car.
Solution: The owner re-synced the Mercedes Me app with the car’s system, following the app’s instructions. They also ensured that the app and car software were up to date.
Lesson Learned: Digital keys rely on software and connectivity, so keeping the app and car software updated is crucial.

13. Expert Insights and Tips

Gaining insights from experts in the field can further enhance your understanding of Mercedes key reprogramming.

13.1. Interview with a Mercedes-Benz Technician

We interviewed a Mercedes-Benz technician with over 15 years of experience in key programming. Here are some key insights:

“Always start with the simplest solutions, such as checking the battery and attempting synchronization.”
“Invest in high-quality diagnostic tools. They can save you time and money in the long run.”
“Stay updated with the latest key technology through training and industry publications.”
“Proper maintenance and handling of keys can prevent many common issues.”

13.2. Tips for DIY Key Reprogramming

Read the Manual: Consult your owner’s manual for specific instructions on key synchronization.
Use the Right Tools: Ensure you have the necessary diagnostic tools and software before attempting reprogramming.
Follow Instructions Carefully: Follow the reprogramming instructions precisely to avoid errors.
Seek Professional Help When Needed: If you encounter difficulties, don’t hesitate to seek professional help.

13.3. Advice from Industry Experts

Expert	Advice	Relevance
Mercedes Technician	“Regularly check and replace the key fob battery to avoid synchronization issues.”	Highlights the importance of preventative maintenance.
Auto Locksmith	“Invest in a reliable key programmer to handle complex reprogramming tasks efficiently.”	Emphasizes the need for professional tools.
Diagnostic Specialist	“Always perform a full diagnostic scan before attempting key programming to identify potential underlying issues.”	Stresses the importance of thorough diagnostics.
Security Expert	“Protect your vehicle’s immobilizer system by following legal and ethical guidelines during key programming.”	Reinforces the importance of ethical and legal compliance.

14. FAQ: Answering Your Questions About Mercedes Key Reprogramming

Addressing frequently asked questions can provide clarity and address common concerns.

14.1. Can I reprogram a Mercedes key myself?

Some basic synchronization steps can be done at home, but complex reprogramming often requires professional tools and expertise.

14.2. How much does it cost to reprogram a Mercedes key?

The cost can range from $75 to $800, depending on the type of key, the complexity of the programming, and the service provider.

14.3. How long does it take to reprogram a Mercedes key?

The process can take anywhere from 30 minutes to several hours, depending on the complexity of the programming.

14.4. Can a Mercedes key be reprogrammed if it’s lost?

Yes, but you will need to provide proof of ownership and order a new key from a dealership or authorized service provider.

14.5. What tools are needed to reprogram a Mercedes key?

Key programmers, diagnostic scanners, and EIS/ESL tools are commonly used for Mercedes key reprogramming. You can find these at CARDIAGTECH.NET.

14.6. Can a used Mercedes key be reprogrammed?

In some cases, a used key can be reprogrammed, but it depends on the key type and the car’s immobilizer system.

14.7. What is the difference between key synchronization and key programming?

Key synchronization is a simple process to re-establish communication between the key and the car, while key programming involves writing new data to the key’s microchip.

14.8. Can a digital key be reprogrammed?

Yes, digital keys can be re-synced or reprogrammed through the Mercedes Me app or by a dealership.

14.9. What should I do if my Mercedes key is not working after a battery replacement?

Try the initial synchronization steps outlined in Section 2.1. If that doesn’t work, seek professional help.

14.10. Are there any legal restrictions on reprogramming Mercedes keys?

Yes, you must have proof of ownership and comply with all applicable laws and regulations regarding key programming.

15. Conclusion: Regaining Control with Expert Key Reprogramming

Mercedes key reprogramming is a crucial skill for maintaining the functionality and security of your vehicle. Whether you’re dealing with a simple synchronization issue or a complex EIS/ESL failure, understanding the process, tools, and preventative measures can save you time and money.

Remember, CARDIAGTECH.NET is your trusted partner for all your Mercedes key programming needs. With our extensive range of diagnostic tools, expert support, and commitment to customer satisfaction, we are here to help you regain control and get back on the road.

Contact CARDIAGTECH.NET today at 276 Reock St, City of Orange, NJ 07050, United States, or call us on Whatsapp at +1 (641) 206-8880. Visit our website CARDIAGTECH.NET to explore our range of key programming solutions and take the first step towards resolving your Mercedes key issues. Let us help you ensure that your Mercedes remains secure and accessible.