If you have a 1998 thru 2001 you must use synthetic oil OR the terms of the class action law suit won't allow for warranty of "OIL RELATED" engine problems.
And if you perform your own oil changes YOU must have proof that synethetic oil was used OR they don't have to fix you "oil guzzling" engine.
MANY of these engines are using a qt. of oil every 500 miles!! Including the 1998-99 E300DT!
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)