Welcome Kevin. Good to have you around. Many folks here will have many answers for your 190D. I won't be one of them, but have test driven an '87 190D and really really liked it. It needs a tranny rebuild, and paint is fading, but I think with a good tranny I would rather have it than my wagon.
Post pics of your 190 when you get it. Sounds like a nice car....

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Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John