Loretta,

If the fuse is indeed bad, and it seems that that is what you found according to your other post, that will indeed keep the dash control from working. I'm quite sure that the missing insulator is what blew the fuse. Make sure the circuit is all back together correctly before replacing the fuse.

Good luck,

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Larry Bible
'84 Euro 240D, 516K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in
Mercedes automobiles