2011 Mercedes S-Class Owner's Manual - Page 291

Operating the climate control systems Activating/deactivating the rearcompartment climate control using the front control panel X 289 dehumidified according to the temperature selected. Turn the key to position 2 in the ignition lock. X Activate the Y rear compartment function via COMAND (Y page 265). The rear-compartment climate control can be controlled via the front control panel using the Y rear compartment function. X To switch on: press the ^ rocker switch up or down. The indicator lamp in the rocker switch goes out. The previously selected settings come into effect again. X To switch off: press the ^ rocker switch up or down. The indicator lamp in the rocker switch lights up. G Warning Condensation may drip from the underside of the vehicle when the automatic climate control is in cooling mode. This is normal and not a sign that there is a malfunction. You can activate or deactivate the "cooling with air dehumidification" function via COMAND (Y page 263). Activating/deactivating the rearcompartment climate control using the rear control panel X i The cooling with air dehumidification function uses refrigerant R134a. This coolant does not contain chlorofluorocarbons, and therefore does not damage the ozone layer. Problems with the "cooling with air dehumidification" function If you can no longer switch on the cooling with air dehumidification function via COMAND, the cooling with air dehumidification function is switched off due to a malfunction. X Turn the key to position 2 in the ignition lock. X To activate: press rocker switch K (Y page 287) up or down and select AUTO. or X Press rocker switch K (Y page 287) up or down and select MAN. X To deactivate: press rocker switch K (Y page 287) up or down and select OFF. Consult a qualified specialist workshop. Setting climate control to automatic G Warning If you switch off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog up more quickly. Window fogging may impair visibility and endanger you and others. Activating/deactivating cooling with air dehumidification Important information The cooling with air dehumidification function is only available when the engine is running. The air inside the vehicle is cooled and In automatic mode, the set temperature is maintained automatically at a constant level. The system automatically regulates the temperature of the dispensed air, the airflow and the air distribution. Z Climate control If you switch off the cooling function, the vehicle will not be cooled when weather conditions are warm. The windows can fog up more quickly. Window fogging may impair visibility and endanger you and others.