When driving over a bump there is a solid sound clunk that seem to be under the drivers seat. I have check and the seat mounting is solid. Car steers well, does not roll. Car is going into winter storage tomorrow . Would like to get some suggestion as to what to look for next spring. I thought it might be shock or/ and struts. Any info would be greatly. Appreciated
When I worked at the dealer I had a 1995-1997 X300 sedan come in for a noise under the passenger seat and it turned out to be a broken gearbox cross member mount assy.
The aluminum bracket was completely broken.
The right side was resting on the exhaust pipe and that was the only reason the cross member was not ‘scraping’ the ground!!!
Check the mounts including the rubber at the rear of the gearbox?
Definitely check out the tops of the shocks. There are rubber cushions on both sides (top and bottom) of the body panel the upper shock rod goes through. Mine were solid and flattened so that there was about an inch of up and down travel before the shock clunked over bumps. Easiest way to check is to look at the top of the mount inside the engine bay. If there is a gap between the top washer and the body panel then problem is diagnosed.