Mercedes R Klasse transmission issues

A faulty transmission oil temperature sensor can trigger a cascade of issues, especially if the gearbox oil level is low. I had similar transmission issues with my BMW 5 series. Was the error memory read out? What codes were stored?

The error memory was read. It showed a fault related to the transmission oil temperature sensor, specifically indicating implausible signal. Do you think topping off the gearbox oil could solve it, or am I looking at a bigger transmission repair job?

Topping off the gearbox oil might offer temporary relief, but the 'implausible signal' suggests a deeper issue with the sensor or its wiring. I would recommend consulting a certified workshop to properly diagnose the automatic transmission and address the temperature sensor issue. It is best to have a professional look before things escalate.

I took it to a local shop, and you were right. The sensor was faulty, and the oil was low. A new sensor plus a transmission fluid top-up solved the problem. It cost 365€. Thanks again!