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:
High-beam flasher
To switch on: turn the SmartKey in the
ignition lock to position 1 or 2 or start the
engine.
Pull the combination switch in the direction
of arrow 3. ...
Removing the mechanical key
Push release catch 1 in the direction of the arrow and at the same time,
remove mechanical key 2 from the SmartKey.
...
Infrared reflective windshield
The infrared reflecting glass prevents the
vehicle interior from becoming too hot. It also
blocks radio waves up into the gigahertz
range.
In order to operate radio-controlled
equipment, ...