w124 rear suspension klunk

[89-300ce]

Looking for the source of a clunk that sounds like it is coming form the drivers side rear seat area when I go over larger bumps. I initialy thought it was the exhaust hitting something but it doesn't appear to be the case. Shocks seem to still have damping. Muti-link bushings and subframe mounts appear to be OK but I'm no expert at what to look for. Anything that doesn't look ripped or frayed or pushed out of place should be OK right? Any suggestions on possible causes of this KLUNK or diagnosis proceedure I should follow? I'm prepared to spend the weekend under the car poking and proding but need some guidance.

Thanks