2003 Audi A4 4 cyl Front Wheel Drive Manual 56,000 miles. Hello, I am from Romania and the roads are pretty bad here. Anyway now it's winter and it's really cold and I have noticed an annoying noise coming from the back of my car. I went to a local Audi service and they tuned up my rear seats but the noise is still there. I have to mention that if I have luggage in the trunk the noise stops and also if I have passengers in the back. I don't now what it is but it really irritates me. I would like to know what can be the causes. Please Help!