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Old 11-15-2012, 01:11 AM   #2
Registered User
Join Date: Nov 2007
Location: Los Angeles
Posts: 2,764
My Ride: 2001 M3
Disuse could be one reason. They have a separate pump which may have gone years without being activated. Also, they can only be switched on when your wipers and headlights are on, and even then it's every 10th pull of the stalk.
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