1. P

    Aircon causing hiss sound from passenger door – why?

    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...
  2. M

    W210 300TD - Strange hiss on turbo

    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...
  3. stwat

    Power steering hiss and judder

    My power steering hisses and judders when i turn it on full lock to the right. Theres no noise at all when turned to the left. Any ideas what might be wrong???? Cheers, Stu.
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