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:

    Parking brake
    WARNING Engaging the parking brake while the vehicle is in motion can cause the rear wheels to lock up. You could lose control of the vehicle and cause an accident. In addition, the vehicle& ...

    Service menu
    In the Serv. menu you can: - call up display messages - restart the tire pressure loss warning system (Canada only) - check the tire pressure electronically - call up the service due date ...

    Opening and closing the side trim panels
    You must open the side trim panel in the cargo compartment before you can change the bulbs in the tail lamps. Left-hand side trim panel Right-hand side trim panel To open: turn release kno ...