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Introduction
32
or to reduce operating costs, e.g. reduced taxes
or tolls, may also be rendered invalid retroac-
tively. This may be the case in the country of
registration as well as the country of operation.
Engine management monitors the BlueTec
exhaust gas aftertreatment systems for compli-
ance with emissions laws and regulations.
Among other topics, the on-board computer
informs you of:
the status of the BlueTec
R
Y
treatment (
page 130)
the level of AdBlue
R
the degree of saturation of the diesel particle
R
Y
filter (
page 311)
If you attempt to operate the vehicle without
®
AdBlue
, with diluted AdBlue
ent reducing agent, this will be detected by the
engine management system. Other emissions-
relevant malfunctions, e.g. dosage malfunctions
or sensor errors, are also detected and logged.
The ; indicator lamp displays emissions-rel-
evant faults after the engine is started. On Blue-
®
Tec
6 vehicles, the ; indicator lamp also
signals the status of the BlueTec
aftertreatment for a quick on-site check by the
authorities.
The  indicator lamp warns you if the diesel
particle filter reaches a critical degree of loading
and indicates a malfunction.
The on-board computer warns you in good time
about emissions-relevant malfunctions or faulty
operation and displays, according to priority:
grey event windows (
R
yellow event windows (
R
red event windows (
R
®
On BlueTec
6 vehicles, the on-board computer
also shows the · indicator lamp in the status
area of the display for the duration of the mal-
function detected.
If you do not observe these event windows and
their instructions, it is possible that:
engine power output will be reduced
R
speed is limited to approximately 20 km/h on
R
®
BlueTec
6 vehicles
the diesel particle filter will have to be
R
replaced earlier than intended
If there is a malfunction with the BlueTec
exhaust gas aftertreatment system, have it
checked and repaired at a qualified specialist
workshop.
®
®
exhaust gas after-
®
Y
(
page 129)
®
or with a differ-
®
exhaust gas
Y
page 153)
Y
page 158)
Y
page 176)
®
Attachments, bodies, equipment and
conversions
Notes on body/equipment mounting
directives
!
For safety reasons, have bodies manufac-
tured and fitted in accordance with the appli-
cable Mercedes-Benz body/equipment
mounting directives. These body/equipment
mounting directives ensure that the chassis
and the body form one unit and that maximum
operating and road safety is achieved.
For safety reasons, Mercedes-Benz recom-
mends that:
no other modifications should be made to
R
the vehicle.
approval should be obtained from
R
Mercedes-Benz in the event of deviations
from approved body/equipment mounting
directives.
Approval from certified inspection agencies
or official approvals cannot rule out risks to
your safety.
Technical changes to the vehicle can affect the
functionality of stability control. Observe the
notes in the body/equipment mounting direc-
tives.
Observe the information on genuine Mercedes-
Y
Benz parts (
page 33).
The Mercedes-Benz body/equipment mounting
directives can be found on the Internet at
http://bb-portal.mercedes-benz.com.
There you can also find information on pin
assignment and fuse replacement.
You can obtain further information from any
Mercedes-Benz Service Centre.
Notes on the engine radiator
Even seemingly small changes to the vehicle,
such as attaching a radiator trim for winter driv-
ing or as protection against insects, are not per-
mitted. Do not cover the radiator. Do not use
thermal mats, insect protection covers or any-
thing similar.
Doing so can cause the diagnostics system to
display inaccurate values. In some countries,
the recording of engine diagnostics data is a
legal requirement, and must always be verifiable
and accurate.
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