Displaying the coolant temperature

WARNING Driving when your engine is overheated can 
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 which can occur just by opening the engine 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.

Press the steering wheel to select the standard button on the steering wheel to select the standard display.
Press the coolant temperature. button to select the coolant temperature.

Under normal driving conditions, with the

Under normal driving conditions, with the correct anti-corrosion and antifreeze additive concentration, the reading may rise to 248 °F(120 °C).

248 °F(120 °C) do not continue driving. The If the coolant temperature exceeds 248 °F(120 °C) do not continue driving. The engine will otherwise be damaged.

    See also:

    Displaying destination information
    Prerequisite: you have entered a destination and possibly an intermediate stop. To activate navigation mode: press the function button once or twice. To show the menu: press the COMAND ...

    MB Info call button
    •► Press and hold MB Info call button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center. The indicator lamp in MB Info call button 1 fla ...

    Releasing seat belts
    ► Press release button 4 and guide belt tongue 2 back towards belt sash guide 1. Make sure that the seat belt is fully rolled up. Otherwise, the seat belt or belt tongue will be trapped i ...