Shop is correct about abjustment, almost!! There are off-set control arm mounting bushings for a small correction of toe/camber. Very complicated & only slight correction avail. Microfische is only source of info on subject.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V