My 88 300E wipers are noticeably slower when the outside air temperature
is below freezing. I pulled the entire wiper assembly out and checked
the linkage. It looks good and now I suspect the cam. I see some screws
on the underside of the cam cover area but I was wondering if I can
service the cam with cleaning and re-lubricating. Can the cam area be
exposed by removing the top plastic cover? Can it be pried off or do the
underside screws have to be removed?