2011 Mercedes E-Class Owner's Manual - Page 142

140 Operating the control systems The air inside the vehicle is cooled and dehumidified according to the temperature selected. 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. 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. Condensation may drip from the underside of the vehicle when automatic climate control is in cooling mode. This is normal and not a sign that there is a malfunction. Climate control i The cooling with air dehumidification function uses refrigerant R134a. This coolant does not contain chlorofluorocarbons, and therefore does not damage the ozone layer. Activating/deactivating X To switch on: press the ¿ button. The indicator lamp above the ¿ button lights up. X To switch off: press the ¿ button. The indicator lamp above the ¿ button goes out. The cooling with air dehumidification function has a delayed switch-off feature. 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. Automatic mode will achieve optimal operation if cooling with air dehumidification is also activated. If desired, cooling with air dehumidification can be deactivated. X Turn the SmartKey to position 2 in the ignition lock. X Set the desired temperature. X To activate: press the à button. The indicator lamp above the à button lights up. Automatic air distribution and airflow are activated. X 3-zone automatic climate control: press switch G up or down and select the desired level (Y page 137). FOCUS Air flow high/air distribution via the center and side vents MEDIUM Air flow medium/air distribution via the center and side vents DIFFUSE Air flow low/air distribution via the center, side and defroster vents Problems with the "cooling with air dehumidification" function If the indicator lamp in the ¿ button does not go out when switched off, the cooling with air dehumidification function is switched off due to a malfunction. You can no longer activate the cooling with air dehumidification function. X i This setting is especially effective in automatic mode when outside temperatures are high. X Consult a qualified specialist workshop. To deactivate: press the air distribution button. Dual-zone automatic climate control: press button F (Y page 135).