As per the previous posts, it's seems like a doable project...

...the concern I have is that the headlight wipers only come on briefly when the washer is activated (when headlights are on). The motors may not be designed for sustained operation like the big mono-wiper...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car