My E63 has developed a clunk. The only pattern I can identify is that it seems to be worse when the car is warm. It sounds almost like an under torqued bolt on a suspension/steering/frame component is allowing something to slip back and forth, but it doesn't seem to be just on bumps or turns or any other definable pattern. I put the car up on the lift today, pulled all the wheels off and inspected ball joints, tie rods, sway-bar links, etc and everything looks fine as much as I can tell.

I know it's a crazy long shot, but has anyone experienced this before that can point me in the right direction? It's really annoying.

 

 

It is very hard to tell where it is coming from. It’s so bassy that it just kind of echoes in the cabin. Front, rear, left, right I can’t really tell. Sometimes I can feel it in the steering wheel and sometimes I can’t. I know that’s not helpful at all.