The engine sits on the subframe. Lower the whole assembly (the engine weight help here). You can run the jack on either the oil pan with a plank between the jack and pan, or on the subframe itself, which ever is easier.

Engine mounts will likely be requried, as the new subframe mounts will effectively lower the engine an inch or more. On the 220D, that caused the AC compressor to knock on the fender until I replaced the engine mounts.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!