Additives; Premium-Grade Unleaded Gasoline; Engine Oil - Mercedes-Benz CLS Operator's Manual

! To ensure the longevity and full
performance of the engine, only premium-
grade unleaded gasoline must be used.
If standard premium-grade unleaded
gasoline is unavailable and unleaded
gasoline of a lower grade is used for
refueling, observe the following
precautions:
only fill the fuel tank to half full with
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regular unleaded gasoline and fill the rest
with premium-grade unleaded gasoline
as soon as possible.
do not drive at the maximum speed.
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avoid sudden acceleration and engine
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speeds above 3000 rpm.
never refuel using fuel with a octane
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number lower than 87. Otherwise,
engine failure could occur.
Only refuel using unleaded gasoline with a
minimum octane rating of 91. If gasoline with
a lower octane rating is used, engine damage
may occur.
If unleaded gasoline is unavailable and
gasoline of an octane grade lower than 91 is
used, observe the following precautions:
Only refuel using enough gasoline to reach
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a gas station that offers unleaded gasoline.
Do not under any circumstances refuel
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using gasoline with a lower octane rating
than 87. Otherwise, immediate engine
damage may occur.
Avoid sudden acceleration and engine
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speeds over 3,000 rpm.
Using mixtures of methanol and ethanol is not
permitted. E10 fuel, a mixture of 10% ethanol
and 90% unleaded gasoline, may be used.
You will usually find information about the fuel
grade on the pump. If you cannot find the
label on the pump, ask the staff for
assistance.
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For further information, consult a
qualified specialist workshop or on the
Internet at http://www.mbusa.com (USA
only).
Service products and filling capacities
Information on refueling (

Additives

! Operating the engine with fuel additives
added later can lead to engine failure. Do
not mix fuel additives with fuel. This does
not include additives for the removal and
prevention of residue buildup. gasoline
must only be mixed with additives
recommended by Mercedes-Benz. Comply
with the instructions for use on the product
label. More information about
recommended additives can be obtained
from any authorized Mercedes-Benz
Center.
Mercedes-Benz recommends that you use
branded fuels that have additives.
Do not mix fuel additives with fuel. This
causes unnecessary costs and could lead to
engine failure.
Carbon deposits may form if the availability
of gasoline with relevant additives is
insufficient (in certain regions). In this case,
Mercedes-Benz recommends additives
approved for use in Mercedes-Benz vehicles;
see http://bevo.mercedes-benz.com.

Engine oil

General notes
! Never use engine oil or an oil filter of a
specification other than is necessary to
fulfill the prescribed service intervals. Do
not change the engine oil or oil filter in
order to achieve longer replacement
intervals than those prescribed. You could
otherwise cause engine damage or damage
to the exhaust gas aftertreatment.
Follow the instructions in the service
interval display regarding the oil change.
Otherwise, you may damage the engine and
the exhaust gas aftertreatment.
Comply with the important safety notes for
service products when handling engine oil
( page 373).
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375
page 165).
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