It’s taken me some time to narrow down, but this highly unlikely scenario has recently started on my 1997 SL320 with standard non-Bose hi-fi system.
By setting the Climate control unit to diagnostic mode I can see the temperature of the refrigerant at the aircon evaporator varying between...
Hello, I seem to have developed a strange hiss when the turbo is working and gets a bit more pronounced when the throttle is at 100%.
So far I have checked:
Air filter - OK and seated correctly.
General look around the turbo - Looks fine, no obvious holes.
There is no lack in performance...