i recently had the rear wheel bearing discs and pads changed on my A4Q. however, when the car is running along there is a squeaking noise from that wheel. if the handbrake is pulled up very slightly it stops. i've just had some copperslip put on the pads and it seemed to cure it for about 2 days but it has come back. could it be that the handbrake needs adjusting slighly?

hope someone can help its driving me insane!