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276 Driving mode
Notes on the diesel particulate filter
®
BlueTec
6 vehicles are equipped with a diesel
particulate filter.
& WARNING Risk of fire caused by hot
exhaust system parts
Flammable material such as leaves, grass or
twigs may ignite if they come into contact
with hot parts of the exhaust system or
exhaust gas flow.
Park the vehicle so that no flammable
#
material can come into contact with hot
vehicle components.
In particular, do not park on dry grass‐
#
land or harvested grain fields.
* NOTE Damage due to hot exhaust gases
During automatic and manual regeneration,
extremely hot exhaust gases escape from the
tailpipe.
Maintain a distance of at least a metre
#
from other objects, e.g. parked vehicles.
Activate regeneration lockout if regeneration
lasts longer than three hours during the journey
(
page 276).
/
If too many particles collect in the diesel particu‐
late filter, the indicator lamp  in the instru‐
ment cluster lights up. The on-board computer
prompts you via an event window to start manual
regeneration (
page 277). Manual regeneration
/
lasts 30 to maximum 60 minutes.
%
If you drive the vehicle predominantly for
short distances or in low-load operation, the
regeneration duration may be considerably
longer. This increases fuel consumption and
can negatively affect the exhaust system
functionality.
If you do not observe the event windows and
their messages, the engine output may be
reduced and it might be necessary to change the
diesel particulate filter.
%
When the É
Engine speed increase
sage appears in the on-board computer, the
"HC-Burn-Off" function reduces hydrocarbon
deposits in the catalytic converter.
This is performed at increased engine
speeds. You cannot cancel the process when
the message appears.
The message disappears automatically when
the process is complete.
"HC-Burn-Off" is not a diesel particulate filter
regeneration function.
Filter replacement
& WARNING Risk of poisoning from soot
particles
It is hazardous to health to inhale or touch
soot particles.
Have the diesel particulate filter checked at a
qualified specialist workshop.
Automatic regeneration
Automatic regeneration of the diesel particulate
filter is performed when the green indicator lamp
É goes on in the instrument cluster.
Automatic regeneration is only performed while
driving.
Automatic regeneration only starts when all oper‐
ating conditions have been met, e.g. sufficiently
high engine oil and coolant temperature. If an
operating condition is no longer met during
regeneration, the indicator lamp É goes out
and regeneration is cancelled. When all operating
conditions are met again, regeneration starts
automatically again. Therefore, avoid interrupting
the journey when the indicator lamp É is lit.
%
The engine noise and the idle speed may
change during regeneration.
Activating and deactivating regeneration
lockout of the diesel particulate filter
Regeneration can be disabled if the increased
exhaust gas temperatures that occur during
regeneration are to be avoided.
This is necessary, for example, in the following
cases:
when driving into a danger zone.
R
when performing work with dry or flammable
R
materials resulting in a heavy build-up of dirt
on the vehicle.
Automatic and manual regeneration cannot start
and a running regeneration is cancelled.
mes‐
Activate regeneration lockout only for the dura‐
tion of the hazard. When regeneration lockout is
activated, regeneration is deactivated even if the
engine is started again. In this case the on-board
computer displays the event window Â
Regeneration
locked.
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