Thankfully I have never had that problem before. Sounds godawful.

I did have a problem with a parts car years ago that I kept in an unheated and un-monitored garage (wouldn't enter it for months) with mold.

I remember needing a seat belt for my than daily driver (old '80's Citroen hatch back) and thought I could easily get one from my identical parts car. When I opened the door to that car for the first time in months, I realized the steering wheel and the seat belts were covered in fuzzy white stuff. Pretty disgusting. Smelled like wet dog too, I think that garage had a problem with moisture.

I never intended for that parts car to ever go back on the road though, so I didn't care much. Still something to keep an eye on I guess.

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"The MB W123 is so bulletproof, you can drive them forever. Which is a good thing as it takes that long to get anywhere."
Betsie: 1984 W123 300D (hobby, 280k miles)
Myrla: 2001 Mazda Protege 2.0 ES 5spd (daily driver, 130k miles)
The Turd: 2007 Toyota Camry (wife's car, 118k miles)

For future reference, "Nature's Miracle" cleaner is actually a miracle-it is actually strong enough to get tomcat stink out of carpet/fabric/etc. Foam you're SOL

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

came across the best 5 gal bucket mouse trap video I've seen to date
https://youtu.be/l4PaGvAhV9I

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Mercedes-Benz Specifications for Operating Fluids: Overview Sheets

Select: 381.0 Preservation instructions passenger cars

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Marshall Welch
Seattle, WA
1982 300D-T