There is one thing that comes into play!! There are OE parts & like OE parts & they AREN'T the same at all. OE parts are what MB dealers sell & aftermarket companies also sell in the original OE manufactures box. THERE are many knock-off parts that aren't even OE. IF the box says Bosch you might think that you are getting OE, but even Bosch has "second" line quality parts!
IF you want OE quality you "shouldn't" be able to buy that part for 50% less than most dealers quote!
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)