Mercedes-Benz C Service Booklet page 14

Emission System Maintenance
12
Emission Control System Caution -
Diesel Engines
Your Mercedes-Benz is equipped with
emission control devices to comply with
current diesel exhaust emission regulations
where the vehicle is certified for sale. Keep
your vehicle in proper operating condition
by following our recommended maintenance
instructions as outlined.
The following has to be adhered to:
a) Diesel engines require Ultra Low Sulfur
Diesel (ULSD) fuel (15 ppm Sulfur
maximum) that meets the ASTM D975
standard. Failure to use ULSD fuel can
severely damage the vehicle's exhaust
after-treatment device.
b) Mercedes-Benz Canada Inc., approves
the use of B5 biodiesel (standard
diesel with a maximum of up to 5%
biodiesel content) in all Common
Rail Injection Diesel "CDI-engines"
including BlueTEC AdBlue
Diesel fuels containing a higher
percentage of biodiesel content, eg. B20,
as well as straight biodiesel may cause
damage to your engine/fuel system and
are not approved. Only use approved
biodiesel. Biodiesel can be refined from a
variety of raw materials resulting in widely
varying properties. Approved biodiesel
meets the ASTM D6751 specifications
and has the necessary oxidation stability
(min. 6h, proved with EN 14112 method)
to prevent damage to the system from
deposits and/or corrosion. The use of
non-approved biodiesel may damage the
fuel system.
G
Warning!
variants.
®
Please make sure you read the technical documentation, such as the Operator's Manual and
workshop information, before carrying out any maintenance work.
Please ask your service station for further
information. If the B5 biodiesel blend is
not sufficiently labeled to clearly indicate
that it meets the above standards, please
do not use it. The Mercedes-Benz limited
warranty does not cover damage caused
by the use of fuels not meeting Mercedes-
Benz approved fuel standards.
c) The specified engine maintenance jobs
have to be performed completely and
at the required intervals.
d) The operation of the emission control
system must not be altered in any
way. Alterations are not permissible by
law. In addition, alterations may result
in damage to the catalysts, increased
fuel consumption, and impaired engine
running conditions.
If the "CHECK ENGINE" indicator lamp in
the instrument cluster illuminates when the
engine is running, it indicates a possible
malfunction of the engine management
system or emission control system.
We recommend that you have the
malfunction checked as soon as possible.