2008 Mercedes CL-Class Owner's Manual - Page 497

Controls in detail Automatic climate control Rear window defroster Warning! Activating Switch on the ignition ( page 365). Press button < ( page 491) up or down. The indicator lamp on the button comes on. G i Maximum cooling MAXCOOL is only available when the engine is running. Any accumulation of snow and ice should be removed from the rear window before driving. Visibility could otherwise be impaired, endangering you and others. Air recirculation mode Switch to air recirculation mode to prevent unpleasant odors from entering the vehicle from the outside (e.g. before driving in a tunnel). This setting cuts off the intake of outside air and recirculates the air in the passenger compartment. Warning! i If the rear window defroster switches off too soon and the indicator lamp goes out, this indicates that too many electrical consumers are operating simultaneously and the load on the battery is reducing available voltage. The system responds automatically by deactivating the rear window defroster. ! The rear window defroster uses a large amount of power. To keep battery drain to a minimum, switch off the defroster as soon as the rear window is clear. Deactivating Press button < ( page 491) up or down. The indicator lamp on the button goes out. G Maximum cooling MAXCOOL (USA only) If U is selected on both the left and right side and there is a high demand for cooling, the display "MAXCOOL" appears in the COMAND display. This provides the fastest possible cooling of the vehicle interior (when windows and tilt/sliding sunroof are closed). i The defroster is automatically deactivated after some time of operation depending on the outside temperature. Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior window fogging persists, make sure the air conditioning ( page 272) is activated, or press button ;. 496