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dominik_moeller43

C Klasse Automatic Transmission Issue

I'm reporting an issue with my 2021 Mercedes C Klasse, gasoline engine. At 123349 km, I'm experiencing a defective automatic transmission parking position. Symptoms include the engine failing to start, the check engine light, and gearbox slippage or unclean shifts. There's also an error stored. Diagnostics suggest a defective control unit, with a repair cost of 1000€. Any similar experiences regarding this automatic transmission failure, transmission sensor, or related transmission issues?

4 comment(s)

friedhelmjung1

Whoa, that sounds rough. I had something similar happen with my C Klasse. Automatic transmission went bonkers. Engine light, weird shifting, the whole nine yards. Was the error code related to the transmission at all? I'm just wondering if it's the same thing. My gut tells me it's not a simple fix.

dominik_moeller43 (Author)

The error code directly implicates the automatic transmission control unit. The symptoms you describe align with my current predicament. Do you recall the specific error code you encountered and the resolution to your transmission issues? Any details would be appreciated, especially concerning the transmission sensor.

friedhelmjung1

Right, I can't recall the exact error code now, but it definitely pointed towards the transmission. I tried looking into the transmission sensor myself, but honestly, it got complex fast. Ended up taking it to a workshop. They confirmed it was some kind of control unit issue. Honestly, based on what you're saying, it sounds like you're heading to the workshop anyway.

dominik_moeller43 (Author)

I appreciate the confirmation and your shared experience. Based on your advice, I will proceed with a professional assessment and subsequent repair. Thank you for your assistance in clarifying the potential scope of this automatic transmission failure.

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