I've just had the honor and privilege of replacing the starter motor in my 300SDL for the second time in three years, and I thought it would be nice to start giving something back to this forum. I've attached a PDF document outlining what I did in replacing the motor.
This is not a terribly difficult procedure and knowing how to do it could save lots of time and effort, especially as it relates to towing a non-starting car to a mechanic or dealer. I rate this a notch above an oil change as far as difficulty. It's not quite as easy as a fuel filter change, but a lot less difficult than replacing the center air vent vacuum pod in the W123 or W126.
Please give me any feedback about the document as I want it to be of value.
The document can be found at the following link since it exceeds the 73 kb limit set in the forum.
http://www.gbcnet.com/mercedes/docs/OM603%20Starter%20Motor%20Removal%20and%20Installation.pdf
Casey