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Pretty sure you're on the right track and that's a suspension problem. I've seen a similar though not exactly the same as that was more like a shock absorber pic on a different make, might have been a bmw.

 

[LONS]

+1
If you saw the spotty kids with dirty rags dealers sometimes use to clean the cars you wouldn't have done that. I always clean my cars before the go in for work because the throw "protective" sheet over the wings to work on the engine and those scratch if the car is dirty. I also make sure it's written in big letters across the work sheet " MUST NOT BE WASHED ". That always raises an eyebrow. :smile2: