Does anyone have a problem with what sounds like a loose steering wheel boss on a E46 330ci? Mine is making a knocking noise when braking over a bumpy surface. The car has titanium interior and I wondered whether the horn assembly was knocking against the metal bottom half of the wheel? It only happens when your getting a "move on" and only under medium to heavy breaking. The car's been in for an Inspection 1 this week but the dealer couldnt find anything wrong. Any one else had anything similar?