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.

Impurities in DEF (e.g. due to other 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:

    Override feature for the rear side windows
    WARNING When children ride on the vehicle's rear seats, activate the override switch. Otherwise, the children could be injured, e.g. by trapping themselves in the rear side window. For the r ...

    Driving safety systems overview
    In this section, you will find information about the following driving safety systems: - ABS (Anti-lock Braking System) - BAS (Brake Assist System) - BAS PLUS (Brake Assist System Plus*) ...

    Important safety notes
    You can limit the opening angle of the tailgate. This is possible in the top half of its opening range, up to approximately 8 in (20 cm) before the stop. Limiting the opening angle can be useful if ...