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First, it appears that the AC panel info is determined with the engine not running. The AC system runs with the engine running only.
Next, we need to know the units of measure. Are you in C or F temp wise? It makes a huge difference in those readings.
Common failure on the W210 is evap temp sensor. Do a search and you'll find lots of symptoms. With your car, it sounds like some of the flaps might not be working. I think there is a diagnostic test for this as well, but don't know how to perform it.
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