On a side note. I highly recommend the washer additive that is sold at the Dealership. I think its called "summer fit" it comes in a small tube and you add it to the washer fluid. It does a great job of removing wax and road oils. I am sure a few drops of Dawn would do the same

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Dennis
2006 E320 CDI Black/Black Leather. Nav, HTD Seats HK stereo 32000 miles.
2000 VW Passat 1.8t 300,000 miles as of Dec 09, 2009 original owner
1997 E300d Silver 300,000 miles As of Jan 05, 2010
3rd owner SOLD