Hello all, I have a Sprinter w906 316CDI, 163hp, built in 2013. The switch for the heater has not shown any reaction for some time, so the heater doesn’t start and doesn’t glow either. At times the malfunction coincided with the attempt to expand the radio (which I did not do after all). I already checked: – fuses: all ok! – plug-in radio and heating (if accessible): everything ok! – diagnostic device icarsoft v2.0 recognizes the standh no eitzung and therefore no error message. – Tank is full – heating controller on full What could that be? ECU defective? Where exactly is this? At Mercedes I was told: Stand heating would be normal after this time, especially if you don’t start the heater longer. But if the switch doesn’t even light up, then it can be that there is no signal to the stand heating and the heater is ok per se, right? Thanks for your help! Best regards Alex