2006 Mercedes C-Class Owner's Manual - Page 198

Controls in detail Automatic climate control* (Canada only) Residual heat and ventilation With the engine switched off, it is possible to continue to heat or ventilate the interior for up to 30 minutes. This feature makes use of the residual heat produced by the engine. Activating Switch off the ignition ( page 33). Press button 9 ( page 187). The indicator lamp on the button comes on. Deactivating Press button 9 ( page 187). The indicator lamp on the button goes out. The residual heat is automatically turned off: when the ignition is switched on after about 30 minutes if the battery voltage drops Rear passenger compartment adjustable air vents The air conditioning for the rear passenger compartment is controlled via the automatic climate control panel ( page 187). i How long the system will provide heating depends on the coolant temperature the temperature set by the operator The blower will run at speed setting 1 regardless of the air distribution control setting. i The temperature at the center air vents for the rear passenger compartment 1 and 3 is the same as at the dashboard center air vents. 197