CV8

Hi,

I own a 2005 c55 amg with the harman kardon sound system. There is no sound output, everything else is working fine. A mech checked the system and advised that the amplifier is defect. However he is not sure. Before ordering a new amp, can anyone confirm if the cooler of the amp should start spinning as soon as the sound system was switched on? Or is it driven by a temp sensor?

Thanks very much in advance.