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:

    GL-Class in the Market
    The GL's price spread gives it a wide range of competitors. At the low end it competes with Infiniti and Lincoln, and at the high end there's Lexus and Land Rover. Though sales are down these days ...

    Speedometer with segments
    The segments in the speedometer indicate which speed range is available. DISTRONIC activated: One or two segments in the set speed range light up. DISTRONIC detects a vehicle in front: T ...

    Washing by hand
    Carefully remove all deposits of road salt as soon as possible when driving in winter. Also, clean the insides of the wheels when washing the underbody of the vehicle. ► Do not use hot wat ...