Hey everyone. Alright... here is the problem. I noticed a little while ago a strange buzzing/whining sound coming from my car. I have isolated it to the region around my back right (if you are looking at the back of the car) wheel. The sound is very similar to the annoying buzz the mercedes generates when you turn off the car... leave your lights on... and open the door. It only happens when the car is on... and is accompanied by a whoosing sound of air, which im guessing is just the sound of the engine exhaust going through the exhaust system. I have a 1992 w124 300E btw... So then... anyone know what is causing the sound... and is it a bad thing? Thanks.