First time benz owner - 1987 420 SEL

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See attached photos. I scooped up this super clean Benz the day after it was put out on a front lawn with a for sale sign on it.

Garage kept 66k original miles. all documentation and service records. it even has the original first aid kit and data plate!

I did the following before turning it into my daily driver:
oil change, trans service, coolant flush, brake flush, replace all belts, replace front brake pads, replace a few light bulbs, replace under hood insulation, tune up (air filter, fuel filter, spark plugs, wires, cap, rotor) - local MB dealer did all this. WHEW!

After two weeks the blower controls stopped working and i had to replace the control unit. Found a re-manufactured unit online for $250, dealer wanted $1100 for a new one!
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little about me. I worked as a mechanic in a little VW shop through high-school, turned into a GM mechanic right out of high-school (GMASEP program), was an ase certified master mechanic by age 18, turned wrenches for a while then went back to school, lived in Colorado for a few years and wound up doing web development, which is what i do now in NJ. I still have all my ase certifications and tools but i don't know ***** about Mercedes other than i love the way they look and feel. I've owned a beetle, jetta, cj5, renault fuego, pontiac parisienne, tacoma, grand am, rav 4 and now the 420 sel.
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So. what do i need to know about my new vehicle? I'm thinking i need new shocks and struts as the handling seems squishy.