See also:

Deleting a destination or the home address from the destination memory
To activate navigation mode: press the function button once or twice. To show the menu: press the COMAND controller. Select Destination in the navigation system menu bar by turning t ...

Warning and indicator lamps
  ...

Low outside temperatures
DEF freezes at a temperature of approximately 12 °F (–11 °C). The vehicle is equipped with a DEF preheating system when it leaves the factory. Winter operation is therefore also guaranteed at ...