- Mercedes-Benz C-Class: Why is My Key Fob Not Working?
Guide to diagnose trouble and recommended solutions
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"Key not detected"
Anyone else experience this?
Im going to try that today when i get home.




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Long short, try and replace the battery.
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That being said, i will still change the batteries today. Thanks guys.
It works that way with the Toyota and infiniti ones (I had a Toyota that had it in the car I traded in for my C63, and my wife currently has it in her FX35), I am guessing it works the same way in most cars that use keyless systems.
It works that way with the Toyota and infiniti ones (I had a Toyota that had it in the car I traded in for my C63, and my wife currently has it in her FX35), I am guessing it works the same way in most cars that use keyless systems.
I have changed the batteries with new and still the same problem.
It used to happen not as frequent but now it almost never get detected.
Please help


Anyone else experience this?
You can test battery by performing test as outlined in your owners manual:
1. Press lock or unlock button on fob.
2. Battery check lamp on fob will light briefly.
3. If light does not come on, replace battery.
Regards,
Joe
J S Benz 7375 sw 45 street miami 33156 305 269 8999
look them up ,, jim




