It was a rare occasion, but I found myself sitting in the back of my 170 TDI quattro the other week. And I heard a strange drumming noise coming from the passenger rear wheel. It sounded a little like the noise a worn wheel bearing might make. Alarmingly there is also a faint smell of rubber coming from the wheelarch after long motorway journeys. Before you ask, the tyre is fine and holds pressure.
Any thoughts as to what it might be?
Anyone had any similar issues on their sportbacks/quattros?
It would be good to know before I book it into Audi...