50,000 to 60,000 miles, more or less. Will run over 100,000 if you don't mind the lousy performance and bad milage from poor ignition.

Lino:

You have considerable wear on the electrodes, quite a bit of splatter, and con-committant cross fire and missfire. Probably runs like crap cold and damp from grounding out, too.

Check the wires for signs of arcing, particularly the wire from coil to dizzy. If you see spidery whitish patterns on metal or plastic parts the wires touch, it's time for new ones.

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!