I have an '06 A4 cab. A bad leak has developed in the w/w unit somewhere below, but not involving the upper reservoir. Has anyone had any experience with this? It looks like the inner fender has to come out to access this thing. How big an undertaking is this? Is the plumbing, such as where the pump in connected just a press fit that might have come loose? I am still covered by the CPO warranty; I don't think that this is covered, but I am going to call the dealer. It would require an $85 deductable, but I have a feeling that this is one of those silly jobs that entails a huge amount of labor!

 

Yes, it involves removal of the bumper cover and left headlight.