ALL MB's designed & produced after 1991 have rear end toe adjustment, so there is 4 wheel adjustment on the C-class. Even the W201 chassis(190's) had rear adjustments.
ALSO 4 wheel alignment doesn't mean that you have to adjust the rear BUT means that the FRONT is adjusted to what the rear is DOING.
ANY time a 2 wheel alignment is done on a car that doesn't have the rear toe-in perfectly straight ahead, the car won't track straight down the road.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)