Wondering if you guys can help. 1. are the floor mats on the 3 door a3 and the 5 door a3 the same/same fitting? 2. I get a humming noise from the rear at 30-40mph after that dissapears ive been told the rear bearings are common.....best place and how much to buy? 3. can the flashing led located next to the heater vent on top of the dash be taken out and replaced with brighter one? CAR IS 2005 SPORTBACK TDI SPORT.