Thanxs DawgBone. Ah. Your explanation makes sense. That could be the reason why I get different reactions from shutting different X5's. Perhaps they were parked on slightly different sloped surfaces.

I don't mind if it's a slight shove leading to a mild slam. What I do mind is having to use more force which leads to a big SLAM!

I'm not looking for quiet operation as soft close doors would allow. But just wondering if slight shove/force can close the door securely.