Need some help with figuring out rear wheel camber on my 201. I understand that the stock camber arms can't be adjust, but I just want to know if some negative camber is normal on the rear? I was doing an alignment all wheels are as straight as I can get them. Car goes straight with no tracking to either side, steering returns to center on turns, and virtually no bump steer when going over rough roads. The car measures about 13 inches plus or minus a a mm or 2 all around from center of the wheel hub to the lip of the fender arch. I ran a strip of paint across the tire treads and drove the car and paint wore evenly on both fronts, but as you can see the 2 rears show a small section on the outer treads that is little to no wear, though they are even on both tires. Thanks.

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1990 190E 3.0L