C300 9g tronic strange noises when warm outside
Strange issue with noises coming from under the hood when its warm outside. No matter if A/C is on or off. When I turn off fan it's quiet. During the winter it's quiet as well. I can hear the sound under 50-60kph, especially when breaking and gears are changing from 3-2-1. The sound is modulated by RPM qnd it's like 'electric' howl. I have checked steering column boot and everything's fine (I saw some similar thread). Service told me, everything is ok and maybe there are some extra noises when climate flaps are open. For me - it's something wrong because it's too loud to be acceptable.. any ideas guys?


