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
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:
Styling
The 2012 M-Class retains many of the previous generation's styling cues, like
a wide front grille and forward-swept C-pillars, but the new design looks more
substantial and imposing. Contributing ...
Front air bags
The front air bags increase protection for the
driver's and front-passenger's head and
chest.
Driver's air bag 1 deploys in front of the
steering wheel; front-passenger front air
bag 2 depl ...
Switching on/off
The three red indicator lamps in the button
indicate the heating level you have selected.
If the battery voltage is too low, the seat
heating may switch off.
The system automatically switches ...