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Old 10-06-2003, 12:38 AM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,123
W140 95 S420 extending wiper revisited

I don't know what a W201 or W124 wiper system looks like but it doesn't sound the same based on this thread W140 95S420 wiper question , and my problem is not that it won't wipe but that the blade doesn't extend.

I've attached a photo of the linkage I see when I remove the plastic cover. The pivot point of this driver side arm is at the lower end of the short arm in the lower left of the photo. I can't see how to detach the aluminium case that contains this assembly from the drive shaft to what sort of cam is underneath. The wiper arm is free to move through its stroke in any wiper position of the wiper's swing so it seems to me that whatever type of cam dictates the blade's position is worn or off track.

Any ideas?

95 S420
91 300SE
87 300SDL
83 300SD
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W140 95 S420 extending wiper revisited-w140-wiper.jpg  
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Old 10-06-2003, 12:50 AM
Registered User
Join Date: Apr 2002
Location: Calgary, Canada
Posts: 164
This is a common problem. Same thing happened to me on the S320 - there is a broken gear in the wiper transmission assy and You can't buy the gear separately. Your dealer will want to sell you the whole wiper transmission assembly, and you'll flip when you hear the price (more than $1000).

Phil at Partshop/Fastlane found me a used one for $300, that I installed myself. Instructions on helped me do it step by step - it was about a 2 hour project.

Good luck...

1995 S320
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