Emission System Maintenance - Mercedes-Benz C-Class Maintenance Booklet

Emission System Maintenance

8
anticorrosion/antifreeze coolant meeting
factory specifications. Please see your
authorized Mercedes-Benz Center for more
information on this subject.
Emission System Maintenance
Gasoline Engines
The U.S. Environmental Protection Agency
and, in California, the Air Resources Board
have certified that the emission control
systems of your vehicle comply with the
applicable exhaust emission standards for
MY 2010 vehicles.
To be certain that the emission control
systems function as designed, regular
maintenance is necessary for components of
the vehicle which affect exhaust and
evaporative emissions composition.
The vehicle owner is responsible for the
regular maintenance of the emission control
system, as well as the use of premium
unleaded gasoline with an anti-knock index of
at least 91 (displayed on the pump) in all
gasoline engine models unless otherwise
specified.
Failure to properly maintain the emission
system may result in repairs not being
covered by the emission system warranties.
Explanations of each maintenance job are
Y
given on ( page 10).
Emission Control System Caution -
Gasoline Engines
Your Mercedes-Benz vehicle is equipped with
both a three-way catalyst and a closed loop
oxygen sensor system to comply with current
exhaust emission regulations. Keep your
vehicle in proper operating condition by
following our recommended maintenance
instructions as outlined.
The following has to be adhered to:
G
Warning!
a) In all gasoline engine models, use only
premium unleaded gasoline with an anti-
knock index of at least 91 (as displayed
on the pump) unless otherwise
specified. Damage to the engine could occur
if premium unleaded fuel is not used. Refer to
the Operator's Manual for special
precautions.
b) Leaded gasoline should not be used
under any circumstances. Damage to the
emission control components will result.
c) In select models, the use of Ethanol
(E85) is also permissible. Models capable
of also operating with E85 are identified by a
label on the fuel filler flap reading 'Premium
gasoline or E85 only!'. Do not use Ethanol fuel
(E85) to operate any vehicle unless it is
specifically identified as Ethanol fuel (E85)
compatible. Damage to the engine could
occur if improper fuels are used. Refer to the
Operator's Manual for special precaution.
d) The specified engine maintenance jobs
have to be performed completely and at
the required intervals. Correct ignition
timing and properly functioning spark plugs
for instance are important for the service life
of the catalysts. Failure to properly perform
the specified maintenance jobs may
adversely affect the emission control system
on the vehicle and reduce its service life.
e) 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.
f) Irregular engine running conditions
should be corrected immediately by an
authorized Mercedes-Benz Center. Such
irregular running conditions can influence the
proper function of the emission control
system.
If the "CHECK ENGINE" indicator lamp in the
instrument cluster illuminates when the
engine is running, it indicates a possible
Please make sure you read the technical documentation, such as
the Operator's Manual and workshop information, before carrying
out any maintenance work.