Hey all! I've bought my A4 2.8 V6 a while ago. Something strange that I can't figure out. When driving the engine makes a strange noise, hard to describe. It almost sounds like the sound worn brake pads would make (screaming sound), but coming from the engine. It just happen between 1 - 2200 Rpm. Any advice? Can it be a belt or tensioner? What must I look for and where??? Thanx!