The W124 is MUCH tighter. Took two of us to do this job on the 300D (stuck in the driveway, alas, with totally locked up starter) because I wasn't strong enough to get the top bolt loose. VERY little space, we ended up with me holding the socket on and my brother using his foot on the breaker bar to get it out. Only enough room for a short extension, as I remember on the top bolt.

Else very easy. You may need to replace the connection on the keyswitch wire as the new starter have a different termnial than the old ones, clip the old one off and crimp the new one on. PITA because the wire is short.

Otherwise easier than the 220D.

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!