My 1982 240D has wheel to control the temperature and not a knob that I see on most. Does anyone have a clue part number this would be? The installed part is stamped 123 820 19 10. This part does not come up any where. The previous owner used RTV to hold it in place, so not convinced this is the correct P/N. Any help would be appreciated.

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1989 560SL
1986 300SDL
1983 300D (Burning Jet-A)
1982 240D
1995 S600

Ive got an 82 240D, I'll check this afternoon when I get home.

It seems the PO replaced the switch with one from a pre 82 car. The part number you provided is for up to 1982. From model year 1982 it's 126 820 05 10.

You are really not going to like the price though, it's $256 MSRP. Yikes!

Good luck.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

Holy hell!! Thank you for the info!!!!

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1989 560SL
1986 300SDL
1983 300D (Burning Jet-A)
1982 240D
1995 S600

Is the AC temperature-wheel not working, or will it just not stay put in the dash?
If it's not working, it can be temporarily bypassed. As for the price, try a Pick-N-Pull.

Happy Motoring, Mark

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DrDKW