2008 Mercedes C-Class Owner's Manual - Page 150

Controls in detail Instrument cluster ! Excessive coolant temperature triggers a warning in the multifunction display ( page 402). The engine should not be operated with the coolant temperature above 248°F (120°C), i.e. in the red zone of the coolant temperature gauge. Doing so may cause serious engine damage which is not covered by the Mercedes-Benz Limited Warranty. Tachometer The red marking on the tachometer denotes excessive engine speed. Outside temperature indicator The outside temperature is indicated in the multifunction display ( page 151). Warning! ! Avoid driving at excessive engine speeds, as it may result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty. To help protect the engine, the fuel supply is interrupted if the engine is operated within the red marking. G i During severe operating conditions, e.g. stop-and-go traffic, the coolant temperature may rise close to 248°F (120°C), i.e. close to the red zone of the temperature gauge. The outside temperature indicator is not designed to serve as an ice-warning device and is therefore unsuitable for that purpose. Indicated temperatures just above the freezing point do not guarantee that the road surface is free of ice. The road may still be icy, especially in wooded areas or on bridges. 149