MB supplies keys by chassis number. Lock cylinders as well, ditto for door locks. Older (pre 1980 by now, I suppose) sometimes have to come from Germany, but they are factory keys. I think I paid $20 or so each for mine, maybe $25 at my local Indy. Be prepared to take a registration or the title in if you don't know the shop well, they don't want to supply keys for stolen cars!

If you need a lock cylinder from Germany, you must also by a key, they don't come as a set. newer cylinders come with a key.

Don't bother with brass keys, they don't last long and tend to foul the cylinder -- costs quite a bit more to get a stuck cylinder out than the steel key costs....

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!