Yesterday, the outside temperature display on the C230 was locked at +15C. This was regardless of the actual temp being about 26C.

I called the dealer, and explained that the display seemed "locked." I had checked the sensor output through the diagnostics mode on the ACC panel, and the sensor was reading the proper temp, just not displaying it properly.

I shut the car off for a while, and came back. Same thing. Well, the dealer explained that they'd have to replace the sensor, the display, and a whole bunch of other parts.

Since they can't get the car in for two weeks, I thought I'd try something kinda novel. I pulled fuses 19 and 30, which are instrument panel fuses. I waited about 1 minute, and replaced them. Guess what? The outside temp display works just fine again. No problems encountered.

Microsoft would be proud! I just "reset" it...

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John Shellenberg
1998 C230 "Black Betty" 240K

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