You don't need to worry about camber kits unless you totally slam the car to the ground. The factory Sportline models have no more camber adjustment than any other 124, and sit about 1 inch lower than a normal 124, about the same was the 500E. None of them have excessing tire wear. Going 2-3 inches dropped will cause excess negative rear camber that can cause some rear inside tire wear. My car is about -2 degrees in the back (and lowered about 1.25 inches) but I don't have excessive wear. It helps if you corner hard, that evens out the wear...
