G350 BT motor control light (yellow) repeatedly on!

Hello everybody! My G350BT will be 3 years old next month, I recently had the current 60,000 KD made. Last week the yellow engine control light went on, but I noticed no restrictions when driving. According to the manual it could be something with the “speed sensor”. I called the workshop and then left the car right there. In the evening came the call “sensors have to be changed, the coming tomorrow”. Obviously also in the workshop in the operating handbuc h looked, yellow people = speed sensors exchange. The next day I got the G back. Two days he drove without a yellow indicator light, today, on the trip to work after about 3 km, again the yellow indicator light. Again no restriction at the performance. MB called, “they bring the vehicle by”. As I know MB, from painful experience between 2000 and 2003 with my convertible, now the game “we just exchange everything that can be exchanged” probably goes off again. O I am too pessimistic? It stinks to me that from tonight I can drive A class again or some kind of crap that I would never voluntarily put myself in. I have already announced that no matter what they offer me as a replacement car, cement bags are transported either on my trailer or in the back seat on the weekend. Maybe tonight there is a transporter on the yard. Does someone have a goal-oriented idea why the yellow control light so without it is eim Driving noticed (Tempomat works, Tacho works, rev counter works), is it? Greetings OpenAirFan