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 temperatures below 12 °F (–11 °C).
See also:
Operating options
You can operate the telephone by:
• using the COMAND controller:
turn .
slide or
.
press .
• the or
button on the telephone keypad on
the center console
• the or
button on ...
Checking the coolant level
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
Turn the SmartKey to position
2 in the ignition lock.
On vehicles with KEYLESS-GO, press ...
Brake fluid
WARNING
Over a period of time, the brake fluid absorbs
moisture from the air; this lowers its boiling
point.
If the boiling point of the brake fluid is too low,
vapor pockets may form in the ...