1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

SL55 AC Compressor rattle at idle

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by candellara, Oct 13, 2018.

  1. candellara

    candellara New Member

    Messages:
    8
    Likes Received:
    4
    Joined:
    Jun 26, 2006
    Location:
    Bognor Regis
    Hi All,

    I've recently replaced the main idler bearing as I knew it was noisy but I think I've also a noise from the AC compressor (noticeable when the car is at idle with AC switched off)

    It's a rattle which sounds like a bearing but goes as soon as you switch the AC on. I guess this loads up the compressor which removes the rattle?

    Anyone had this issue and has anyone DIY'ed a fix?
     
  2. LostKiwi

    LostKiwi Senior Member

    Messages:
    13,797
    Likes Received:
    5,215
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    It'll be the magnetic clutch rattling. Why turn off the Aircon?
     
  3. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    15,938
    Likes Received:
    3,566
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 ///AMG V8 Biturbo Volvo XC90 2018
    As above, leave the aircon on normally. Are you switching it off when you drop the roof?
     
  4. OP
    candellara

    candellara New Member

    Messages:
    8
    Likes Received:
    4
    Joined:
    Jun 26, 2006
    Location:
    Bognor Regis
    Didn't really give it too much thought tbh. Just heard the rattle and then figured out it was the ac compressor. As said, probably just leave aircon on :)
     

Share This Page