[R129 SL] Windshield wiper

[TomandKaren]

The wiper on my 1990 500sl has started to park in various locations on 
the windshield leading me to believe that I need to lube the mechanism.

I'm wondering how the big cover is removed?

I didn't find any help in the archives and G. Murphy's article in the 
Star didn't apply to this model.

Thanks in advance for any help.

Tom Weitkunat
Fort Collins, CO