Engine-wise, I think it just needs some fuel mixture tuning to run in tip-top shape. The only thing that I have done to it is to re-wire the aux fan temporarily as the thermo switch is busted.
Plans for it is to just keep it stock, clean and well maintained. Maybe at most upgrade the audio head unit, a sub and some tweeters and call it a day. I'll be replacing the plugs and will use Royal Purple fully synthetic oil for its oil change this coming weekend. If time permits, I might as well change the ATF just to be safe.
As an additional info, this is my first ever Mercedes-Benz. But, I come from a long line of Benz driving family so this brand is not something I'm unfamiliar with. My father and I never really bothered much about the Mercedes-Benz brand, we are more into modifying Japanese cars for drag racing (mostly DIYs like turbocharging, ECU tuning, etc). But from my great grand father to my uncles and aunties, they all drive MBs. Here are some pics.
My great-grandfather with his Benz (is this really a mercedes?)
Some of the many Mercedes-Benz cars my grandfather has owned through-out his life. As the story goes, during the fuel-crisis, Cadillacs (his preferred brand) stopped coming in here, hence his switch to the MB brand. His first ever MB is the 230SL '67 on the picture which he bought back in 1971 or 1970 (i forgot). Until the time of his death, he drove and rode in MBs.
His MB garage during the late 70's
One of his last MBs that he left on his death, along with a w123 wagon and a W126 300SD
Right now, I have two aunties who both own W210 E230s, two uncles who have been restoring and selling numerous MBs (mostly w123s, w116 and some pre-70's ones too); one of them is currently restoring a 1957 180D. I'll take pictures when I see him.
Cheers to you all.