Yes.

We diesel junkies tend to call it the keyswitch because we don't have an ignition, per se. And on the older MB diesels, the fuel and starter/glowplugs aren't operated off the key anyway, but by a knob on the other side of the dash.

You will need one off a diesel because it also has a vacuum switch for the fuel cutoff.

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!