Cars just developed a speed related droning sound, seems to be from the front and worse when turning left at speed. No difference when braking. Does this sound like a wheel bearing issue (had one go on previous B6 at around the same 130k mileage). If so is this a DIY job or is it a real pig. Remember the garage had a nightmare doing it on my previous B6, but they weren't a VAG specialist. Any pointers?