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:
Active bonnet, seven airbags and PRE-SAFE as standard
During the course of its development, the new E-Class was subjected to more than 150 high-speed crash tests and a total of more than 17,000 realistic crash simulations. The crumple zone principle in ...
The windshield wipers are obstructed
Leaves or snow, for example, may be
obstructing the windshield wiper movement.
The wiper motor has been deactivated.
For safety reasons, you should
remove the SmartKey from the ignition lock.
...
Overinflated tires
WARNING Follow recommended tire inflation pressures. Do not overinflate tires.
Overinflated tires can adversely affect handling and ride comfort, wear unevenly,
increase stopping distance, an ...