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The headlight wipers work in conjunction with the headlight washer spray. Only.
In more recent times, the pressure of the spray has been increased so that wipers are no longer necessary.
In Germany (EU?) it's legally mandatory to have headlight washers if the car has HID headlights. It's a good way to tell if a prospective purchase has HID lighting. (Headlight automatic leveling is also required with HID lighting.)
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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles
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