2005 Mercedes S-Class Owner's Manual - Page 167

Controls in detail Control system Setting daytime running lamp mode (USA only) Press æ or ç to select manual or daytime running lamp (constant) mode. This function is not available in countries where daytime running lamps are mandatory. With daytime running lamp mode selected and the exterior lamp switch at position 0, the following lamps will come on automatically when the engine is turned on: Parking lamps and low beam headlamps License plate lamps (in low ambient light conditions) i If you turn the exterior lamp switch to another position, the corresponding lamp(s) will switch on. For safety reasons, resetting the LIGHTING submenu to factory settings ( page 161) while driving will not reset the daytime running lamp mode. In the multifunction display you will then see the message: LIGHTING - CANNOT BE COMPLETELY RESET TO FACTORY SETTINGS WHILE DRIVING. i This function is not available in countries where the daytime running lamp mode is mandatory and therefore in a constant mode. Move the selection marker with the æ or ç button to the LIGHTING submenu. Press button j or k repeatedly until you see this message in the multifunction display: LIGHTING CIRCUIT HEADLAMP MODE. The selection marker is on the current setting. 165