Mercedes-Benz 2013 CL Operator's Manual page 488

Service products and filling capacities
486
if the vehicle is carrying a light load, e.g.
R
two passengers without luggage, do not
allow the engine to rev above 3000 rpm.
if the vehicle is fully loaded or is being
R
operated in mountainous terrain, do not
depress the accelerator pedal further
than Ô of the pedal travel.
Only refuel using premium-grade unleaded
gasoline with a minimum octane rating of 91.
Reformulated Gasoline (RFG) and/or
unleaded gasoline with additives can be used.
The concentration of additives in the fuel,
however, must not exceed 10 %, e.g.:
Ethanol
R
TAME
R
ETBE
R
IPA
R
TBA
R
For MTBE, the concentration should not
exceed 15 %.
The concentration of methanol in gasoline,
including other additives, must not exceed
3 %.
Using mixtures of methanol and ethanol is not
permitted. Gasohol, a mixture of 10 % ethanol
and 90 % unleaded gasoline, may be used.
All of these mix fuels must fulfill the fuel
requirements, e.g.:
knock resistance
R
boiling point
R
vapor pressure
R
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.
i
For further information, consult an
authorized Mercedes-Benz Center or on
the Internet at http://www.mbusa.com
(USA only).
Information on refueling (
Additives
! Do not refuel with low-grade fuel and do
not use fuel additives that are not tested
and approved for Mercedes-Benz vehicles.
Damage to or malfunctions of the fuel
system may otherwise occur.
One of the main problems of poor fuel quality
is the forming of deposits that are created
during the gasoline combustion process.
Mercedes-Benz recommends that you use
branded fuels that have additives.
If you use fuels without these additives over
a longer period of time, carbon deposits may
build up. These deposits form at the inlet
valves and in the combustion chamber in
particular.
This could lead to engine problems, e.g.:
longer engine warm-up phase
R
uneven idle
R
engine noise
R
misfiring
R
loss of power
R
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.
For a list of approved products, consult an
authorized Mercedes-Benz Center. Comply
with the instructions for use on the product
label.
Do not mix other fuel additives with fuel. This
causes unnecessary costs and could damage
the engine.
Engine oil
Points to note
! Never use engine oil or an oil filter of a
page 284).
Y
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