I have to do the very same service on my '91 300E. May I ask what your wiper switch is doing wrong? On mine, the headlight high beam switch is shorting and cutting off my low beams unless I jiggle the switch every 3 minutes

Just curious,

-GH

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1992 Mercedes Benz 500SL
1998 BMW 528i
2003 Honda Element
2002 CBR600F4i
1977 Coachmen Motor Home