I recently did an engine swap on 2 300Ds, to improve my wife's car. The double swap out and into both vehicles took 6 days (mainly on my own). I leased a factory unit for 2 weeks, borrowed an engine crane, gathered my tools, car stands, some tubs for draining engine & trans fluids.
Went without major probs although did have difficulty with A/C compressor spacers - which one goes where?
There was no documentation on the spacers.