2008 Mercedes C-Class Owner's Manual - Page 149

Controls in detail Instrument cluster Adjusting instrument cluster display illumination Brightening illumination: Turn dimmer 1 clockwise. Dimming illumination: Turn dimmer 1 counterclockwise. Coolant temperature gauge The coolant temperature gauge is on the left side in the instrument cluster ( page 26). Warning! G 1 Dimmer Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned. Steam from an overheated engine can cause serious burns and can occur just by opening the hood. Stay away from the engine if you see or hear steam coming from it. Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down. i The instrument cluster illumination is dimmed or brightened automatically to suit ambient light conditions. The instrument cluster illumination will also be adjusted automatically when you switch on the vehicle's exterior lamps. 148