2011 Mercedes S-Class Owner's Manual - Page 399

Display messages Display messages Possible causes/consequences and M Solutions 397 Active Headlamps Inoperative b Malfunction See Oper. Manual The exterior lighting is faulty. X Visit a qualified specialist workshop. The light sensor is faulty. X Visit a qualified specialist workshop. USA only: X b AUTO Lamp Function Inoperative Switch off the daytime running lamps in the on-board computer (Y page 377). X Switch the lights on and off using the light switch. b Please Switch Off Lights The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to $ or c. or X If the rear fog lamp is switched on: press the light switch in to the stop. Adaptive Highbeam Assist is faulty. X Visit a qualified specialist workshop. Adaptive High-beam Assist Inoperative Engine Display messages Possible causes/consequences and M Solutions The coolant level is too low. X Add coolant, observing the warning notes when doing so (Y page 450). X If coolant needs adding more often than usual, have the engine coolant system checked at a qualified specialist workshop. + Check Coolant Level See Oper. Manual G Warning Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. You could be seriously burned. Z On-board computer and displays b The active light function is faulty. X Visit a qualified specialist workshop.