Hello together, now I have to ask for advice: For some time now I have been hearing a constant “whispering/whispering” with my moose, as soon as I initiate the ignition process (passed clutch pedal) (starter has not yet started turning) and then also during the normal engine run. Turbocharger I exclude 100%, because I still remember the sound of a defective turbo from BMW times very well. My guess from previous research in the net indicates a defective turbo. Low pressure or vacuum pump. I have not found any leaks on hoses on the moose so far, there is nowhere to be found out. What I noticed was that I also have a rather “hard” brake pedal before every start process – normally this would have to be reasonably easy to operate after a maximum of 8 hours of engine outtime, wouldn’t it?