The job isn't too hard with two people (so you can keep the chain in contact with the cam gear at all times. Very simple with the nice little plastic guide that fits over the cam sprocket -- that makes it a one man operation!
You will need a means of grinding off the pins on a link -- there is no master link -- and a means of swaging the new link in place properly. The best tool is the official MB tool (it can be rented, search on the subject for sources), but you can also improvise with a body dolly and a ball peen hammer. Some people use a "master link" with spring clips, but I won't.
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!