According to a post in this thread:
OM603: Vacuum pump explosion, bearing intact! Injection Pump Timing device wrecked
a '94 Volvo 850 Turbo has an electric vac pump. This may be a little easier to find.

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'83 300D Turrrbo 295K miles

One of the advantages of a compression-ignition engine is that it continues to run even if the electrical system fails. Having a mechanical vacuum pump means that everything vacuum operated is also immune to electrical failures. By changing to an electrical vacuum pump, you are throwing away that advantage. IMHO, electrical failure is much more likely than vacuum pump failure – just count the posts in this forum. The only significant Mercedes vacuum pump problem in the past 30+ years is the OM603 open-bearing issue and that is easily fixable before it causes a problem.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Yea, but so what? If the vacuum pump fails, your transmission will shift harshly and the brakes will have no boost, but you will still be able to drive the car.

not safely. Brake booster does alot of assisting

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