For a couple of weeks now my A4 has been issuing a strange noise. I've taken various people out to try and determine the cause, including our "trained techicians" but they drew a blank. I'll do my best to describe.
It starts (abruptly) when you hit about 35mph and then continues, but disappears (abruptly) when you slow to below 28mph. It remains at the same pitch and volume all the while, regardless of speed. Steering lock makes no difference.
It's a wowowowowowowow sort of sound, the closest I've ever heard before was on the centre propshaft bearing of my Dad's old Sierra.
I think it's eminating from the n/s Front, but it isn't the bearing. It isn't something daft like a stone caught in a disc or anything like that.
The car is mechanically sound apart from needing the rear brakes replaced pretty damn quick.
Any ideas? Common noise? Ignore it and hope it doesn't fall apart on me?