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:

    Useful information
    This Operator's Manual describes all models and all standard and optional equipment of your vehicle available at the time of publication of the Operator's Manual. Country-specific diffe ...

    Vehicle identification plate with vehicle identification number (VIN) and paint code number
    – Open the driver's door. You will see vehicle identification plate 1. Example: vehicle identification plate (USA only) 2 Paint code 3 VIN Example: vehicle identification plate (Canad ...

    R350 Bluetec in the Market
    One look at Mercedes' 2010 sales numbers is all you need to understand the R-Class' niche status. In a year when the automaker's midsize M-Class and full-size GL-Class SUVs sold around 30,000 and ...