Before I started work on my new-to-me 300D, I had the engine and underside power washed by a detail shop in Santa Rosa. They actually took it someplace else because of environmental regs -- they didn't have the proper disposal equipment. If you call around in your area you should be able to find a place.

Make sure they have experience doing this kind of a job -- I have heard that in the hands of a novice it is way too easy to squirt high-pressure water into places where it doesn't belong. Gaskets and seals are generally not guaranteed to keep out water from a pressure washer!!

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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