hi to everybody reading, im new to audi and forums for that matter. Looking for some advice. I have recently purchased an A3 s-line quattro 2.0tdi on an 05 plate which has got a strange noise from the rear. At 50mph in 4th, 60mph in 5th and 70mph in 6th at about 2000rpm under slight load i.e overtaking or going up a slight hill you get what i can only describe as a a loud vibration/bearing noise. It only lasts for a little while and you can drive through it, get to about 80mph in 6th and its gone. I have only had car for 3 weeks and the selling garage has had it back for a 1 week of those 3 and are no closer to resolving the noise. Can anybody shed any light on this or give me some pointers for the garage to look at. i would appreciate any help.
On a seperate note the car itself is awesome, its only a 140 but the power delivery is great and the grip of the quattro system is brilliant, and not forgetting the sound of the BOSE. Glad i made the transition from BMW.
Thanks in advance