Was swapping out my air filter, and I had the nuts in the tray cap. Of course, when I went to bolt it all back up (butterfingers!) dropped the tray, and down the sewer grate it all went.

So, does anyone know what size nut I need to replace them? I think these were flanged 12mm, but I could be off base. I had some 13mm, but too big. 11mm too small. Jeeze is it even metric or some special MB sizing thing...

Any help is appreciated.

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Ethan Hunter
1986 Mercedes-Benz 300SDL (263,000 miles)

It will be metric... at a guess M6 coarse thread... go for the correct thread size not the outer hex size.

Alternatively get a magnet and go fishing.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!