Find a used 1995-1996 C36 engine with computers, wiring harness, and preferably tranny and diff. These will bolt-up.

You will need changes mostly in the A/C fittings/hoses, unless you can make your wagon's A/C pump bolt-up (I could not).

Keep your ABS. Also, you'll need to disable ASR unless your wagon came with it (ASR stock on C36).

Good luck,

:-) neil
1988 360TE AMG, aka E36T AMG
1993 500E