Hello Forum I have a R 171 from 2005, 200 K. When I purchased the three years ago, the heating of the seat driver side was defective. It’s not tragic. I like the heating in the backrest. This morning I switched on the heating, as usual three LEDs light up, after some time this automatically regulates. In this case the LED went out after 3 seconds. New attempt: 3 seconds: off. Stay out: after 3 seconds. Where is the error ?