Volkswagen Passat B5 Discussion
Car: 1996 Audi A4 Quattro (but this is my favorite forum, with the best-qualified responders, so bear with me and think "4-Motion" :) )
Symptom 1:
Hum at all speeds, pitch is directly proportional to car, not engine, speed, coming from rear of vehicle
Symptom 2:
Small accumulation of...