W129 Wiper Problem

[Robert Deming]

My 300SL windshield wipers were jerky and likely to park almost anywhere, and I was advised that the mechanism should be lubricated before it failed seriously. To lube the wiper assembly, it must be removed from the car to gain access to the back side of the gear case, the actuator arms, and wishfully the wiper blade eccentric mechanism.

I have removed the wiper assembly and cleaned and lubricated the motor driven worm and pinion and all the rubber bushings on the actuator arms. However, I can't find any way of removing the plastic cover over the wiper blade eccentric drive. I read the article in the July/August 2008 Star, and have followed every thread pertaining to wipers in this forum. There are no release tabs on the back of mine, and I can't spread the plastic case to release it. All I have been able to do so far is to pry the case open far enough to "squirt" some spray lubricant blindly into the case, not a very satisfactory solution.

Does anyone know the correct procedure for removing the large plastic cover over the wiper blade drive on a 129? I will be very grateful for all assistance.

Bob Deming