Are you tired of expensive dealership fees for simple car key programming? Many car owners face this frustration when they need a new key fob programmed. Dealerships often charge hefty prices for what can actually be a straightforward procedure. If you’re a hands-on car owner, you might be surprised to learn that programming your smart car key fob yourself is possible, potentially saving you a significant amount of money. This guide, based on a real user experience, will walk you through the steps of programming your smart car key fob using readily available tools and software.
While this guide is based on a specific experience and is for informational purposes, always exercise caution and consult your vehicle’s manual. This procedure was reported to work using Xentry/DAS 3.2012 with a clone C3 multiplexer and a TAN code generator.
Here’s how to potentially program your smart car key fob at home:
What You Will Need:
- A laptop with Xentry/DAS 3.2012 software installed.
- A compatible multiplexer (clone C3 or similar).
- AVT1.4 TAN code generator software (available on online forums).
- TANLogfix file (also available on online forums).
- Your new smart car key fob and your existing fobs.
Step-by-Step Guide:
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Prepare the Software: Start by launching the Xentry software on your laptop and ensure your multiplexer is properly connected to both your laptop and your car’s OBD-II port.
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Navigate to Key Programming: Within DAS (Diagnostic Assistance System), navigate through the system menus to find the immobilizer key programming function. Typically, this is located under “system” => “EDG control unit” => “Control unit adaptations” => “Immobilizer” => “Teach-in key again”.
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Initiate Key Teach-in: Carefully read all on-screen instructions provided by DAS. Proceed by pressing F3 to initiate the key teach-in process. The system will then generate a request code.
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Generate the TAN Code: Open the AVT generator software. Enter the request code you obtained from DAS into the “key teach-in” section of the AVT generator and click “calculate”. The software will generate a TAN code.
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Enter the TAN Code: Return to DAS and enter the generated TAN code into the designated field. Confirm the code by pressing “okay”.
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Key Fob Synchronization: Within 30 seconds of the TAN code being accepted, take each key fob you wish to program (including your old ones and the new one) and press the lock button twice. Do this for each fob you want to synchronize with your car.
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Complete the Process: Once you have pressed the lock button on all key fobs, navigate back to the main DAS menu. You can now exit DAS/Xentry and disconnect the multiplexer from your vehicle.
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Test Your Keys: Test all programmed key fobs to ensure they are working correctly with your vehicle’s locking system and ignition.
Important Considerations:
- Disclaimer: This procedure is based on a single user experience and might not work for all vehicle models or software versions. Proceed at your own risk. Incorrect procedures can potentially cause issues with your vehicle’s immobilizer system.
- Software and Tools: Obtaining and using software like Xentry/DAS and TAN code generators may involve legal and security considerations. Ensure you are using legitimate and safe sources.
- Vehicle Compatibility: This guide is based on experience with a Mercedes-Benz vehicle using specific software. Compatibility with other car brands and models may vary significantly. Always research compatibility for your specific vehicle before attempting this procedure.
- Professional Assistance: If you are uncomfortable with any of these steps or are unsure about the software or tools, it is always recommended to seek professional assistance from a qualified automotive locksmith or a trusted mechanic.
Conclusion:
Programming your smart car key fob at home can be a viable option for those who are technically inclined and want to avoid dealership costs. By following these steps and taking necessary precautions, you might be able to successfully program your key fob yourself. However, remember to prioritize safety and seek professional help if needed. This DIY approach can save you money and provide a sense of accomplishment in maintaining your vehicle.
