By moving the distributor you can cause crossfiring inside the distributor cap. AT TDC you must align the centerline of the rotor with a punch mark on the distributor housing. Cross firing will damage the engine at higher RPM's.
TIMING isn't adjustable on the 16V engine.
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)