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:

    Activating/deactivating Blind Spot Assist
    You can use the Blind Spot Asst. function to activate or deactivate Blind Spot Assist (Y page 198) or Active Blind Spot Assist. – Press or on the steering wheel to select the DriveAssist men ...

    First-aid kit
    – Open the tailgate. – Remove first-aid kit 1 from the parcel net. Check the expiration date on the first-aid kit at least once a year. Replace the contents if necessary, and replace mi ...

    Parcel nets
    WARNING Parcel nets are intended for storing lightweight items only, such as road maps, mail, etc. Heavy objects, objects with sharp edges, or fragile objects may not be transported in the ...