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:
Engine emergency off
If the engine cannot be switched off as
described, observe the following procedure:
Take the fuse allocation chart out of the
vehicle document wallet.
Search for “Emergency engine shutdown”
...
Seat belt
Problem
Possible causes/consequences and
Solutions
After
starting the
engine, the red seat
belt warning lamp lights
up for six seconds.
The seat belt warning ...
Vehicle
Activating/deactivating the automatic door locking feature
If you select the Automatic Door Lock: function, the vehicle is centrally locked
above a speed of around 9 mph (15 km/h).
For further ...