Hello Phaetonists, in the 60 tsd. inspection nobody could help. For about two months at 1100-1400 U a loud resonance noise, even minimal vibration on the body, is noticeable. From 1500 U, think then the turbo uses, it is less noticeable, or is perhaps also overlaid. When driving in towns/city after starting at traffic lights, it is particularly annoying. In the fault memory nothing is stored, probably primarily mechanical nature. Can it come with air mass controller or defect from the turbo? The engine bearings which are hard placed, via underpressure control it is apparently not according to the workshop. Now enough, who of you has met similar synthesizers or has a guess which makes sense to check. Greeting, Eridanus