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					Originally Posted by ntmatter
					
				 
				Do you have any more information on how to do this?  I've had this sort of "programmable" system in other cars, and it works great.  If all I have to do is swap out a relay, then that'd be a much preferable option for me. 
 
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You swap the wiper relay for a VW/Audi relay.  Then you can program the interval.  The part number is 3B0 955 531.