the servo is a chrysler climate control gadget that controls the heat, and a/c and it's fragile and problematic. I have a good one for sale if you go that route and it's needed.
those wheels belong on the 124... so they must have spacers on them to fit... not good.
there are plenty of other problems with the coupe. the HEAVY york a/c, the vacuum controlled seats, the trim that's ONLY available from other coupes, the rear window regulator that is ALWAYS broken...

the 2.5T has timing chain needs, and delivery valve leaks, and turbo rebuild needs, along with other engine and transmission possibilities in a 23year old vehicle...
I'd vote the 2.5T personally, but as said, if it was an 82+ it's a slam dunk for the coupe...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!