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Old 01-31-2002, 06:45 PM
Senior Member
Join Date: Nov 2000
Location: SW Chicago Suburbs, IL
Posts: 264
W126 Wiper Motor Runs, Wipers Not Moving

Quick question...
I cleaned off about a foot of snow from the car this morning. When I got in I turned on the wipers to clean the windshield the rest of the way and heard a POP sound. I noticed the wipers were not going back and forth. Opened the hood for a better idea of what was going on. I can hear the wiper motor running, but the wipers are not moving. They can be moved back and forth by hand and the headlight wipers work fine. When moving them by hand, every now and then they will catch and move about 1 inch, but that's about it.

I bid on a wiper transmission and motor from eBay for around $55 for both.

Does this sound like the wiper transmission needs to be replaced? If so, how difficult is it? I've got the W126 CD's, but some first hand advice would be helpful.
Lance Allison

Sold: 1987 MB 300SDL, 320k miles, Astral Silver, Blue Leather, all books and records from day one.

Totalled: 1998 VW Jetta TDI, 488k miles, Classic Green/Gray Leather, loaded, E-Codes, "Slightly" modded, "Slightly" faster than stock, arrived 11/07/1997.

MBCA Member, Chicago Region
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Old 01-31-2002, 07:00 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,114
I've only worked on W116 wipers. It could be that one of the ball and socket joints in the wiper assembly came apart. You might be able to just pop it back together. If the W126 is anything like the W116, it should quite easy to get to the wiper assembly. I hope it's not like the W116 that needs new windshield grille rivets.

If you have to take the assembly apart, consider new seals where the wiper shafts go through the case. A bad seal led to corrosion inside the wiper assembly in my W116.

91 300SE
81 300SD
78 450SEL (sold)
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