2007 Mercedes CL-Class Owner's Manual - Page 461

Controls in detail Automatic climate control Convenience opening: Press button , for approximately 2 seconds. The side windows and/or tilt/sliding sunroof will return to their previous position. You can release button , once the opening procedure has begun. The windows and tilt/sliding sunroof continue opening until they have reached their previous positions. The indicator lamp on the button goes out. The air recirculation mode is deactivated. Residual engine heat and ventilation With the engine switched off, it is possible to continue to heat or ventilate the interior. This feature makes use of the residual heat produced by the engine. Activating Switch off the ignition ( page 336). Press button T ( page 453) up or down. The indicator lamp on the button comes on. Deactivating Press button T ( page 453) up or down. The indicator lamp on the button goes out. i If you switch on the residual heat function when outside temperatures are high, only the ventilation will be switched on. i Regardless of the selected air volume, the blower operates at low speed when heating. In case of ventilation the blower operates at higher speed. i How long the system will provide heating depends on the coolant temperature the temperature set by the operator i The residual heat is automatically turned off: when the ignition is switched on after approximately 30 minutes if the battery voltage drops if the coolant temperature is too low 460