Purity

Assuring the purity of DEF is particularly important with respect to avoiding malfunctions in the exhaust gas aftertreatment system.

If DEF is pumped out of the DEF tank, e.g. during repair work, it must not be returned to the tank. The purity of the fluid can no longer be guaranteed.

service products, cleaning agents or dust) Impurities in DEF (e.g. due to other service products, cleaning agents or dust) lead to:
• increased emission values
• damage to the catalytic converter
• engine damage
• malfunctions in the BlueTEC exhaust gas aftertreatment system

    See also:

    Driving on flooded roads
    Do not drive through flooded areas. Check the depth of any water before drivincg through it. Drive slowly through standing water. Otherwise, water may enter the vehicle interior or the engin ...

    Standard display
    ► Press the button on the steering wheel to select the standard display. Standard display 1 Trip odometer 2 Odometer You can select the following functions in the Standard display men ...

    Rolling with the engine switched off
    WARNING There is no power assistance for the steering and the brake when the engine is not running. Steering and braking requires significantly more effort and you could lose control of the ...