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1991 500SL
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51 Posts
Discussion Starter #1
Mercedes with single blades can dry up over time, which can lead to corrosion and eventual seizure. Mine was very dry.

If anyone can help me with a detail exploded view of the wiper transmission, there are six very thin shims/washers an I‘m not sure how to put them back in. To lube my wiper mechanism on my 1991 500SL 129 chasses I had to completely remove the wiper system which then allowed me to remove the three phillips screws holding the cover on. In some of the threads they say the cover is plastic and held on with two clips underneath. I my case my cover was metal an held on with three screws.

Thanks, Ron MB
 

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1999 SL500 Sport, Black Opal Pearl, Helios Leather, Pano roof, AMG Aero2 18"Split Rims, Rear Seats
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1,231 Posts

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Y2K SL500 Silver
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8,660 Posts
Mono Windshield Wiper Gear

Mercedes with single blades can dry up over time, which can lead to corrosion and eventual seizure. Mine was very dry.

If anyone can help me with a detail exploded view of the wiper transmission, there are six very thin shims/washers an I‘m not sure how to put them back in. To lube my wiper mechanism on my 1991 500SL 129 chasses I had to completely remove the wiper system which then allowed me to remove the three phillips screws holding the cover on. In some of the threads they say the cover is plastic and held on with two clips underneath. I my case my cover was metal an held on with three screws.

Thanks, Ron MB
You may want to consider 'lubricating the internal plastic gear teeth of the Mono Windshield Wiper Gear'. Please read https://mercedessource.com/node/24
 

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2012 350ML
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383 Posts
There is a warning in the service literature that specifically advises you not to take the wiper transmission apart. When I had mine out, I heeded that warning but did find a couple holes in the back and pumped them full of lithium grease.

I know there are servicable parts inside but I chose not to fight that battle at the time and stayed focused on my evaporator.

If someone takes this apart, please photograph it and post a how-to here.
 

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Greek God of the R129
SL500-500SEL-190E
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8,454 Posts
The usual problem is the plastic gear brakes.
I thing there is a guy on ebay selling them.
Dealer will sell you the whole assembly. $$$$$

Regards.
aam.
 
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