Hello .., the topic of heating without function is unfortunately also with me a topic In my W140 (year 92) the heating starts, but ends its service after about 30 seconds, or the started blower stops again.The petrol pump and the glow candle do not give a life sign. Remarkable: In the display already after a few seconds only an F. The heating is almost new, it is the model no. 012 54518 32. Unfortunately not Greetings