Emission Control System Caution - Mercedes-Benz Light Truck 2002 Service Booklet

Emission Control System Caution

Your Mercedes-Benz is equipped with both a three-way cata-
lyst 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:
a. In all models, use only premium unleaded gasoline with
an anti-knock index of at least 91 (as displayed on the
pump). Damage to the engine could occur if premium
unleaded fuel is not used. Refer to the Operator's Manual or
Factory Approved Service Products booklet for special pre-
cautions.
b. Leaded gasoline should not be used under any circum-
stances. Damage to the emission control components will
result.
c. The specified engine maintenance jobs have to be per-
formed 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 mainte-
nance jobs may adversely affect the emission control sys-
tem on the vehicle and reduce its service life.
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 cat-
alysts, increased fuel consumption and impaired engine
running conditions.
e. Irregular engine running conditions should be cor-
rected immediately by an authorized Mercedes-Benz
Light Truck Center. Such irregular running conditions can
influence the proper function of the emission control sys-
tem.
"CHECK ENGINE" indicator lamp in the instrument cluster: If
the lamp comes on 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.
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