SL55/63/65/R230 AMG: ABC Question - car leans


My '03 SL55 rear is to be leaning to the right in the rear. I can visually see it and placing a sprit level on the trunk lid confirms what I see. This is the case weather ABC is activated, or if it's been parked for several days (ruling out blocking valve or strut leakage. I've adjusted the height with DAS to 27.5" as measured at the center of each rear wheel arch and it stays there after its parked. Is it possible that the wheel arches are off by maybe 1/2" or more? It has had paint on the LR quarter panel, but there's no indication of any significant repair work either around the edges or from inside of the wheel well (liner removed of course), or from inside if the truck (liners removed).
I imagine the dealers, using the MB body inclination tool might set it up differently, but I'm a few hundred miles from a dealer and I doubt the local Indy's would have that tool as none specialize in MB.
Any insights would be appreciated.


