Hello, I have the following problems on my Smart 451 since this afternoon. – If I turn on the ignition the radio does not automatically turn on (until this morning always functioned perfectly), but it can be switched on manually after the engine start – the air button no longer works – and finally the seat heating also strikes (if you keep the push button of the seat heating lit a lamp, but does not stay on) as said …. this morning everything was still OK …. and all of a sudden these three mistakes!! about helpful answers and tips I would be very grateful!!!