From soon after I got my Superb estate, I was aware of a knocking sound coming from the nearside of the car.  It could be heard especially at low speeds (up to about 40 mph) if the left side of the car was at an angle compared with the right side, such as going over a speed bump on one side of the car only or going over road imperfections on the nearside.  The first visit to a dealer was a waste of time, but a different dealer admitted they could also hear the noise and thought the doors and boo