MBZMAN I have just repaired my jacking points .To keep them good you need to remove the jacking rubbers , the ones under the car ,. They are wax injected to start with .But more will keep it in first class condition As for the door i have one on my back door same place.I found the reason why.The check strp wanted replacment .You would know the reason as its a normal thing with this model after a few years .After i removed the door card, i saw the sound deadening pad had come away from the door ,just about half of . So took a better look .The top was dry ,but the bottom was damp .This was the root to the rust scab on the outter door.