SL400 2016 Sport+ Mode - Grating noise and smoke

Discussion in 'Engine' started by Karaokek, Apr 15, 2017.

  1. Karaokek

    Karaokek New Member

    Messages:
    3
    Joined:
    Mar 29, 2017
    Car:
    SL400 AMG, E 220 d SE
    Maybe someone has had a similar problem.
    Relates to 2016, May, SL400 – 8,000 miles on clock.
    I have had the car for last 4 weeks.
    Have experienced the following problem yesterday and today.
    Yesterday, whilst doing a hard acceleration in sport+ mode had a momentary grating sound (I liken it to the sound of an old skiffle washboard) – eased off the accelerator, everything OK. Drove the car rest of the day, no more hard accelerating, everything OK.
    Today – same thing, but as I came to a halt, seconds after, the car was enveloped in light grey smoke. Smoke quickly went – I switched to comfort mode and carried on without a problem.

    Spoke to Mercedes, who advised that it may be a stone caught in the brake pads – this could cause the noise and the smoke.
    My concern is that this has only happened when hard accelerating – not braking and only when in sport+ mode.

    Any thoughts or suggestions would be much appreciated.
     
  2. renault12ts

    renault12ts MB Club Veteran

    Messages:
    15,674
    Joined:
    Mar 5, 2009
    Car:
    2005 W215 CL500.
    My thoughts...not a stone.

    Second thoughts...get it in to the dealer for investigation.
     
  3. OP
    OP
    Karaokek

    Karaokek New Member

    Messages:
    3
    Joined:
    Mar 29, 2017
    Car:
    SL400 AMG, E 220 d SE
    Have to say I'm thinking on same lines - thanks for your reply.
     
  4. MarkACLS

    MarkACLS Hardcore MB Enthusiast

    Messages:
    208
    Joined:
    Mar 12, 2017
    Location:
    South Lanarkshire - UK
    Car:
    2014 W212 E63 AMG 5.5 BiTurbo
    Probably not the brakes, but do be aware that stability control uses both the throttle and the brakes and it can be that under heavy acceleration or high lateral load that the car may be independently braking a wheel.

    I often get, after a spirited drive, more brake dust on the rear wheels, than i do on the fronts - even in Sport handling mode.

    Sent from my Pixel XL using Tapatalk
     

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