Here is a random / possibly stupid question. I recently bought a 2013 Golf 2.0 Bluemotion GT Tech Tdi and i've started noticing a strange noise. It usually happens a few seconds to a few moments after I open / shut a door, I hear a weird thumping noise from the interior of the car. Any one ever come across this before, and is it something I should be concerned about? My car has leather interior, was wondering if it was due to heat / pressure build up and the leather seats "creaking"?? Or is it coming from somewhere else in my car, I have no idea what it could be!