GLS Hybrid Transmission Oil Pressure Sensor Issue

I had a similar issue with my GLS though it's not a hybrid The first sign was the transmission warning light Did you check the basics What does the oil pressure reading show Is it fluctuating or consistently low A faulty pressure switch could trigger a sensor fault even with correct pressure A sensor replacement might fix it Remember oil pressure acts as a pressure gauge inside your transmission and relies on the transmission sensor to show if you have enough oil pressure

I appreciate the quick response I haven't directly measured the oil pressure My tool only reports the generic 'transmission oil pressure sensor fault' error code How can I test the pressure switch or sensor to see if they work before deeper work

Without live data finding the cause is hard You need a scan tool that reads the oil pressure value directly from the pressure gauge which is beyond basic checks The pressure switch is just on or off it doesn't give a pressure reading Your shifting issues suggest more than a simple sensor Given your symptoms especially the grinding don't drive it further Take it to a trusted workshop to avoid more damage

Thanks for the advice I had the car taken to a Mercedes-Benz service center The diagnosis was low transmission oil and a faulty transmission oil pressure sensor The sensor was replaced the oil was refilled and the repair cost 365€ The transmission seems okay Your insights helped me decide what to do and I appreciate your help