Ditto the previous post - it probably needs to be cleaned and re-lubed. To do so properly, you will need to open it up and clean and then add new lubrication.

See this thread for instructions -

http://www.peachparts.com/shopforum/tech-help/52298-92-w124-wiper-removal-not-cd.html#post307591

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon