I've owned my 1991 300e (m103) for almost 8 years now.I've had to do the following in the last 90k mi:water pump@60k,head gasket(small oil leak)@115k,eha@132k(very slight leak).These were the only items other than my regular mtc. I also added bilstien heavy duty shocks and eibach front and rear sway bars and 15x7 inch 8 hole replica wheels w/ bridgestone re950 tires to tidy up the handling.The car is a joy to drive and still looks like new dispite covering 135k miles.I dont ever plan on parting with it........unless I find a cherry 400e,e420,500e,e500 124. These cars are built like tanks and with proper care and mtc. will outlast just about any car out there.