I've noticed recently that occasionally when at low speeds (usually manoeuvering the car in car parks) when turning left I seem to get a low down grumbling/rubbing sound coming from the power steering of our 2007 A4 2.0 TDi Cabrio.
You can't really feel much through the steering itself but you can certainly hear it.
Its strange in that it sounds more hydraulic than mechanical?!
Any ideas what it might be? Is there anything I should be looking for?
Any pointers would be a great help to hopefully avoid a large bill!