I did an engine swap between 2 W123 300Ds and just unbolted the compressors, wired them out of the way and bolted them onto the replacement engines. Bit of a bear finding out which of the 3 spacers to install on each of the 3 bolts o nthe A/C compressors though.
On both cars, the A/C fired up as cold as ice.
One had R134a and the other HR12 refrigerant.

I am embarking on another exercise - transplanting an OM617 into a 280E, in place of a M110 with low compression (rings) on #4.

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Tony from West Oz.
Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine.
Josephine '82 300D 390kkm White/Palamino int.
Elizabeth '81 280E, sporting a '79 300D engine.
Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior


Various parts cars including 280E, 230C & 300D in various states of disassembly.