208 Convertible Roof - Cant find this problem

Discussion in 'Bodywork' started by richard1401, May 1, 2014.

  1. richard1401

    richard1401 New Member

    Messages:
    8
    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Have looked at all the threads on Roof problems this seems specific
    Have replaced Switch bow ram limit switch that fits on the drive cylinder

    My problem is as follows (see GF77.30-P2002KA)
    Soft Top Closed
    Turn lever, Push roof up
    Press and hold switch (S84)
    Windows drop, Roll Bar lowers (If up)
    Soft Top bow unlocks
    Soft top bow goes up to approx. 90 degrees
    Soft top cover releases and pivots upward
    Soft top bow moves into compartment
    At this stage it all stops!!
    I have always had to give the roof a push at this stage but now it doesn't work

    If I turn the ignition Off and On And Close the roof it all shuts and locks OK
    (ie Roof now closed with no lights flashing)

    If I manually drop the roof into the compartment and close the flap manually
    And Manually lock it with the tool
    Then Turn the Ignition ON and Off
    (ie Roof now fully open with No Light Flashing)
    The roof all works and Closes Automatically with no Lights flashing

    Hopefully its just a microswitch

    Any ideas please - I am on Holiday for a week so will keep looking but cant do anything
     
  2. markmifsud

    markmifsud Hardcore MB Enthusiast

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    CLK320 CAB (A208) 02
    A test of SDS (STAR) should point to where there is a fault. As you say, I would suspect a limit switch but its best to get a diagnosis first. At a guess it is not seeing the Bow lock
     
    Last edited: May 1, 2014
  3. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    I have had broken wires too.
     
  4. OP
    OP
    richard1401

    richard1401 New Member

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    May 1, 2014
    Location:
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    Car:
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    Which wires where broken
    But surely it would not close either
     
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    richard1401

    richard1401 New Member

    Messages:
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    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Took the to MB for STAR test#
    NO FAULTS FOUND

    They suggested manually reading and testing everything

    Which limit switches would you suggest I have fitted a new Main Bow Switch (The on that fits on the main unit that lifts and drops the roof
     
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    richard1401

    richard1401 New Member

    Messages:
    8
    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Took the to MB for STAR test#
    NO FAULTS FOUND

    They suggested manually reading and testing everything

    Which limit switches would you suggest I have fitted a new Roof Hook Position Sensor (A208 820 2310)(The one that fits on the main unit that lifts and drops the roof
     
  7. markmifsud

    markmifsud Hardcore MB Enthusiast

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    Location:
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    Car:
    CLK320 CAB (A208) 02
    Strange that you have had a fault and yet no stored faults read out by STAR. Are you sure it was MB Star they used and not some other system?
     
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    richard1401

    richard1401 New Member

    Messages:
    8
    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Star

    Really strange this took it to the main dealer in Shrewsbury

    The paper is called Diagnosis Assistance System

    Filter Status ALL CONTROL UNITS

    The only thing that appears to relate to Convertible Problems is
    RVC Rollover Bar Soft Top Module

    Other al like
    ESM Electronic Selector Module
    AB Airbag
    PSE Pneumatic System
    and about 15 other

    Really not sure if they did the correct test
    Did ask them to read out the faults for the roof

    Thanks

    Richard
     
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    richard1401

    richard1401 New Member

    Messages:
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    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Fault codes

    They say they used STAR
    and it read all the codes and said nothing was wrong

    He feels that something is out of sequence

    That a switch or sensor is not right - but I knew that already!!

    What is really interesting is that it all works perfectly SHUTTING
    EITHER from manually being opened and locked manually
    OR from where it stops opening if ignition switched of and the button pushed the other way

    Just to reiterate
    Everything Closed and LOcked with Roll Bard Up and windows closed
    Turn Ignition on ad start engine
    Turn Handle and lift Roof
    - Windows drop
    Press open on Button
    - Roll Bar Drops
    - Soft Top Bow Catch release
    - Soft Top Goes Up to Vertical
    - Rear Cover Catch Release
    - Rear Cover goes Vertical
    - Soft top Bow Drops into Compartment

    Its at this stage it stops working
    I Did replace the Roof Hook Position Sensor (A208 820 2310)
    This is the long sensor that fits on the roof activator on the left side of the vehicle behind the door

    (As mentioned earlier If I switch the ignition On/Off and press the control button the other way it all shuts as it should - including returning the Roll Over Bar (Rear Head Rests) to where they where before)

    It has been suggested that the sensor(s) on the rear hatch is wrong but surely if the system detected that this was not correct the soft top bow would not drop!

    There is a sensor below this that I have not tested

    Thanks
     
  10. markmifsud

    markmifsud Hardcore MB Enthusiast

    Messages:
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    Joined:
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    Location:
    Bromley, London
    Car:
    CLK320 CAB (A208) 02
    Does the BOW lock when it drops back down in fault mode? ie, is the BOW dropping at the end of your sequence, or is it dropping and locking
     
  11. OP
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    richard1401

    richard1401 New Member

    Messages:
    8
    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    Bow Lock

    When the Roof CLOSES everything works as it should

    ie Cover closes and Locks down
    Bow Closes AND LOCKS
    Then windows go up and Roll over bars Go up if they where up when sequence started
    IT DOES NOT SOUND A CHIME

    The problem is just on part of the opening sequence
    Cover Unlocks and lifts
    BOW DROPS INTO COMPARTMENT
    THEN NOTHING
    as mentioned earlier I have replaced the long switch on the left soft top bow hydraulic cylinder (Soft top bow limit switch)
    (The original moving part had slipped off its pin and we stuck it on with super glue. I am sure this worked for a short time. After I left it over night the new error occurred and I broke the switch removing it -- Before sticking it on we had nothing ((Obviously))

    Do you know what the switch below the Soft top bow limit switch does


    I was amazed that replacing this switch did not cure the problem as I would have though that this switch (Soft top bow limit switch ) would have sensed that the bow had reached its limit! {Does exactly what it says on the can}

    Is there a sequence of which switch does what anywhere

    I have found the article that explains how to replace the Case Cover and Bow Lock replacement but I have no fluid leaks and they all work Reservoir full)
    THANKS
     
  12. OP
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    richard1401

    richard1401 New Member

    Messages:
    8
    Joined:
    May 1, 2014
    Location:
    Shropshire
    Car:
    208 Convertible
    All Sorted Thanks

    Had to tighten up the pump screw

    Why is it always something sensible
     

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