2005 Mercedes CLK-Class Owner's Manual - Page 127

Controls in detail Lighting i With the SmartKey removed from the starter switch or the engine turned off with KEYLESS-GO* and the driver's door open, a warning sounds if the parking lamps or low beam headlamps are switched on. The message Turn off lamps! appears in the multifunction display Manual headlamp mode The low beam headlamps and the parking lamps can be switched on and off with the exterior lamp switch. Automatic headlamp mode The following lamps switch on and off automatically depending on the brightness of the ambient light: Low beam headlamps Tail and parking lamps License plate lamps Side marker lamps Warning! G If the exterior lamp switch is set to U, the headlamps may switch off unexpectedly when the system senses bright ambient light, for example light from oncoming traffic. the headlamps will not be automatically switched on under foggy conditions. To minimize risk to you and to others, activate headlamps by turning exterior lamp switch to B when driving or when traffic and/or ambient lighting conditions require you to do so. In low ambient lighting conditions, only switch from position U to B with the vehicle at a standstill. Switching from U to B will briefly switch off the headlamps. Doing so while driving in low ambient lighting conditions may result in an accident. 125