I have an 56 plate A3 2L TDI Sline Quattro. I jumped in the car the other day and went turning the rear wiper on it stopped halfway and will not work anymore - Have i blown a fuse? All the front wipers woek and I think the spray works as well - If so where do i find the fuse box as i checked the book and it seems to say there are two fuse boxes? Any help much appreciated as i hate not being able to look behind me!!