Can any one tell me what could be causing a clunking sound at both sides of the car whilst driving over bumps. Its located around the central door pillar. If I jam my elbow hard into the door inner, forcing it outwards the clunking stops. I've already adjusted the door latches so that the doors close tighter against the door seals, but no improvement occured. This sound is the only anoyance in an otherwise beautifully quiet car. HELP please.