Remember to keep an eye on the upper and lower engine wiring harnesses as 93-95 benzes are a ongoing issue due to biodegradable insulation that auto manufacturers were forced to use at that time.

Also the EGR needs alot of cleaning to get it clear for proper operation. Low mileage and low speed/idle operation only makes the problem worse. You have more buildup at low rpm(idle) then at highway speed. The low milage car you bought probably got great care but not everythng that is normal maintenance is on the tune up list ie EGR tube cleaning.