leonmeyer3

Mercedes C Klasse TPMS Issue

My 2011 Mercedes C Klasse with a gasoline engine is throwing a TPMS issue at 292654 km. The tire pressure seems low, and I'm getting an error message on the speedometer. I did a tire check and the pressure seems normal with a pressure gauge, but the error persists. The error is also stored in the error memory. Any ideas?

4 comment(s)

I experienced a similar sensor fault with my Volvo. The symptoms sound like a classic case of a failing tire pressure sensor. These sensors have internal batteries that eventually deplete. The error being stored confirms a genuine TPMS issue rather than a simple flat tire situation. Are you able to read the specific error code? Sometimes, the code will identify which sensor is the problem.

Interesting! I don't have a reader to check the error code by myself. Is there really no other reason than the sensor?

While it's impossible to rule out all other possibilities without a proper diagnostic check, a depleted sensor battery is highly probable given the mileage and the symptoms you describe. Other potential, though less likely, causes could include a faulty TPMS receiver module or wiring issues, but these are rare. Given the age of the vehicle and mileage, I would advise having a workshop check the TPMS sensors. Prepare for a bill of around 280€.

Thanks a lot for the advice! I took it to the workshop and it turned out to be exactly what you said: empty sensor battery! They replaced the sensor and the error is gone.

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