There are actualy two sizes! The size depends on punch marks on the bearing cap. WITH 1(one) OR no punch mark the size is 51.600 to 51.609mm.
With 2 punch marks 51.609 to 51.619mm.
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)