W202 headlamp wiper motor rebuild advice

Discussion in 'Parts, Maintenance & Servicing' started by Abb, Aug 8, 2018.

  1. Abb

    Abb Hardcore MB Enthusiast

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    As part of my ongoing (never ending) project of my W202 C43, I have decided to take the opportunity to refurb the headlamp wiper motors. One was working no problem but the other was seized solid.
    Opening both of them, they appeared to be in fine order, no signs of water ingress and plenty of white grease on everything.

    Came across this thread relating to the motors, albeit for a W124
    HOW TO: Headlight Wiper / Washer System Diagnostics and Repair

    As well as this relating to a volvo headlamp wiper motor, which is exactly the same apart form the fixing bracket.
    How To Repair A Volvo Headlight Wiper Motor

    So following the instructions on the volvo thread I have managed to sort out the seized cog with a little sanding with a dremel.
    My success was short lived, as when I re assembled the motor and tested it....nada, nothing, diddly squat!
    When I disassemble it and test the motor with all cogs in place, everything spins freely.
    The small cog with a built in locator pin which is situated at the opposite end of the motor (pic 7 on the volvo thread) bottom right hand corner had been dislodged and now I have no idea what its purpose is or the correct way to re install it.
    Any ideas who can refurb these units or can anyone shed any light on what I need to do please.




     
    clk320x likes this.
  2. OP
    OP
    Abb

    Abb Hardcore MB Enthusiast

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    As the motor is made by Bosch, I have got the Bosch part number 0390 2062 05. Interestingly the Volvo from the same era is showing the Bosch part number 0390 2062 15.
    I can see that the bracket and connector plug are different to that of the MB ones, but everything else looks to be the same.
    Not knowing what difference the 1 digit of the part number makes, I may risk buying a used one from the bay to draw comparisons. Strange that a used MB one with the above part number are advertised around £100 and the Volvo equivalent with the above part number are available for less than £20!
     
    clk320x likes this.
  3. clk320x

    clk320x MB Club Veteran

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    It’s the ‘Mercedes tax’ Abb, you will probably find it’s identical apart from the bracket and connector as you said :) for £20 it’s worth a punt?
     

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