Hi, I've search high and low for an answer to this and the clearest one I can find is for an A4 with blocked drain plug under battery. The water does not come in under heavy rain but only when I go through a car wash, I can see it ******* down on the right hand side of the passenger foot-well. The only thing that seems reasonable to me is that it is indeed a blocked drain hole. Can anyone tell me if and where they are on an A3 please?