300ce seat backs not locking upright

Discussion in 'Interior' started by ninaandphil, Aug 21, 2011.

  1. ninaandphil

    ninaandphil New Member

    Messages:
    27
    Joined:
    Aug 1, 2011
    Car:
    Mercedes 300CE 24V
    Hi all,
    Just fitted replacement black leather electric seats into my 300ce. Had fun fitting a wiring harness into the passenger side, through the door etc, which wasn't electric before, but happy to say all electrics working fine.... BUT!!! Neither of the seat backs are locking into position, and this isn't affected by having the doors closed, engine running etc...
    There is a vacuum pipe under each seat, which I haven't connected up yet...(missing connector)...
    does anyone know if this pipe is related to a locking mechanism, or what they are for. The buttons to release the seat backs and tilt them forward have no 'feel' to them, and don't have any resistence when pushed in.
    Any advice greatly appreciated.
    Phil..:dk:
     
  2. GP801

    GP801 Hardcore MB Enthusiast

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    I think it needs the vacuum connected for the locking to work.
     
    1 person likes this.
  3. bh13coupe

    bh13coupe Hardcore MB Enthusiast

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    yep, my coupe failed its only MOT in 7 years on that issue, I had a vacuum leak which wasnt locking the seatback when the engine was running. wasnt expensive to fix, more of a hassle tracking down the leak. do u get any wihning/hissing noise in the cabin when the car starts up?
     
  4. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    are you in drive?
     
  5. Pontoneer

    Pontoneer MB Club Veteran

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    You need the vacuum connection for the locks to work .
     
  6. OP
    OP
    ninaandphil

    ninaandphil New Member

    Messages:
    27
    Joined:
    Aug 1, 2011
    Car:
    Mercedes 300CE 24V
    Hi all, thanks for confirming my suspicions... I need to find a couple of 'sleeves' to join the car and the seat vacuum pipes together... hopefully that will work... by the way, the car is a manual.
    Cheers!
     
  7. babyblueCE

    babyblueCE Hardcore MB Enthusiast

    Messages:
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    Joined:
    Aug 13, 2011
    Car:
    300 CE
    From my understaing the vacuum is what keeps the seats locked upright. That needs to be connected for the seats to lock, it is also a MOT failure if the seats don't lock.
     
  8. Dieselman

    Dieselman Banned

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    Clear plastic tubing as sold in B&Q works well.
     
  9. carat 3.6

    carat 3.6 Hardcore MB Enthusiast

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    The seats only lock in position when under vacuum.
     

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