You can fix just about everything on this car by yourself. Parts are not very expensive and the cars are solid. You won't get as much life out of the four cylinder engine as you would a six cylinder. Things to watch out for is the Automatic Climate Control make sure everything works properly, there are problems with the power windows in a lot of 190s and you will probably need to replace the rubber in the suspension as the rubber deteriates as a function of time as well as mileage.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T