Mercedes-Benz SLK-Class 2008 Owner's Manual page 127

Controls
Air conditioning
Thermotronic *
Function
1 Q Sets the airflow
2 U Controls the air conditioning automatically
3 y Activates/deactivates the demisting function for
the windscreen
124
Recommendation/Notes
i
Activate automatic air conditioning. The indicator
lamp in the U button comes on.
i
Only use the "demisting" function until the wind-
screen is clear again.
( page 129)
Y
( page 127)
Y
( page 130)
Y
* optional