I have a '92 190d 2.5l turbo (om602) 5sp manual running great.

I've been told by a friend of mine that he found a 300d turbo (om603) for less money than I could sell my car.

Lets say both cars are in the same condition, which one would you chose? I can swap the automatic to 5sp manual without any costs if not gain some money (people in Albania pay up to $600 for a manual to automatic trans swap).

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1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection. Next in the list is water injection.