uhmm.. make sure both temp settings are the same... SLK have dual climate controls.. if the problem persists.. my guess is the problem is in the jog dial that controls the teperatures.
The dual-zone climate control system for the SLK is similar to that in the W210, the primary difference being that the system controls temperature at the air outlets only, since there is no in-car temperature sensor. A dust/pollen filter is also included.
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