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:

    Adjusting the seats
    Vehicles without Memory function: the seats can be adjusted within three minutes of a front door being opened. The time period starts over again if, within these three minutes, you: • open or ...

    Introduction
    In the DriveAssist. menu you can:  - show the distance display  - activate/deactivate ESP®  - activate/deactivate PRE-SAFE® Brake  - activate/deactivate ATTENTION AS ...

    M+S tires
    At temperatures below 45 °F (+7 °C), use winter tires or all-season tires. Both types of tire are identified by the M+S marking. Only winter tires bearing the snowflake symbol in addition t ...