S430 windshield wiper calibration - w220 - Page 2 - Mercedes-Benz Forum
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post #11 of 17 (permalink) Old 04-22-2019, 04:02 PM
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How did you re-position the wiper arm? I have read in some posts that it's possible to force them down, but I was worried about doing this.

Thanks
Ollie
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post #12 of 17 (permalink) Old 04-22-2019, 11:37 PM Thread Starter
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Originally Posted by oliverp View Post
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How did you re-position the wiper arm? I have read in some posts that it's possible to force them down, but I was worried about doing this.

Thanks
Ollie
Bert easy to change motor. Just a fee screws. The shield stuck to the window was the trickiest part. - Just pull up delicatelly. Repositioning: first place the motor and attach the wipersarms - then reposition before You screw Them down.
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post #13 of 17 (permalink) Old 04-23-2019, 04:46 AM
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That's good to know Martin. I had been avoiding the job for both the expense of a new motor* and because it looked like a PITA.

Now, it's just the expense holding me back. My wipers occasionally stop just above park when switched off. It's a little annoying, and I have to clear the (f) every time a scan the car.


*About $215 on MBOEMParts.com.

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2002 V70-XC (228K Castrol 0W40)
2002 V70-T5 (198K, Mobil 1 0W40)
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post #14 of 17 (permalink) Old 04-23-2019, 10:01 AM
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Originally Posted by oliverp View Post

How did you re-position the wiper arm? I have read in some posts that it's possible to force them down, but I was worried about doing this.

Thanks
Ollie
No you do NOT force them down!! You remove them completely and then re install them few clicks down. Just make sure you get a wiper removal tool since sometimes they are stuck and can't be removed by hand.
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post #15 of 17 (permalink) Old 04-23-2019, 10:14 AM
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You can adjust the arms. If you look closely at the windshield near the end of the passenger wiper blade park position, you will find a small line in the windscreen. This shows the desired parked position for the blade.
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post #16 of 17 (permalink) Old 04-30-2019, 04:03 AM
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I believe in most cases, these sorts of problems can be resolved by cleaning & lubricating the "ring contact" in the wiper motor. Some have also suggested moving the "ring contact" so that a non-worn part of the metal/copper is exposed. I believe this contact point is how the wipers know the correct position to "park" the wipers when they are switched off.

Obviously replacing the wiper motor will also fix the issue, but the above DIY is a much cheaper thing to try first. It's something we need to do on mine, as the wiper 9 times out of 10 don't park correctly now (and run once when the car is next switched on as a result). I'm also wondering if it will resolve issues with why my wiper don't sense rain properly on setting I, as the rain sensor is believed to be good.
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post #17 of 17 (permalink) Old 04-30-2019, 11:51 PM
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Originally Posted by chapzboy View Post
I believe in most cases, these sorts of problems can be resolved by cleaning & lubricating the "ring contact" in the wiper motor. Some have also suggested moving the "ring contact" so that a non-worn part of the metal/copper is exposed. I believe this contact point is how the wipers know the correct position to "park" the wipers when they are switched off.

Obviously replacing the wiper motor will also fix the issue, but the above DIY is a much cheaper thing to try first. It's something we need to do on mine, as the wiper 9 times out of 10 don't park correctly now (and run once when the car is next switched on as a result). I'm also wondering if it will resolve issues with why my wiper don't sense rain properly on setting I, as the rain sensor is believed to be good.
I would try this first... I never opend wiper motor myself but my neighbour has same age W163 and he stated that repairing ring contact by bending contact clips to get more contact force and cleaning surfaces cured issue in his car. W220 wiper has very likely similar structure.

-Do not try this at home -
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