
XPress button : to select  Yes.XPress button  a to confirm.
Remaining driving range
XPress button  = or ;  to select the
Trip  menu.XPress button  : or 9  to select the
estimated remaining driving range.
Note that the values are calculated based
on the current fuel tank level and the
current driving style. Make sure to refuel in
time.
If only very little fuel is left in the tank, a
vehicle at the fuel pump  C appears
instead of the estimated remaining driving
range.:Estimated remaining driving range
Digital speedometer
XPress button  = or ;  to select the
Trip  menu.XPress button  : or 9  to select the
digital speedometer.:Digital speedometer
Navi menu
The  Navi  menu contains the functions
needed to operate your navigation system.
XPress button  = or ;  to select the
Navi  menu.
Route guidance not active
The multifunction display shows the direction
of travel and the name of the street you are
currently driving on, if known by the
navigation system.
:Direction of travel;Street you are currently driving on
Route guidance active
The image in the multifunction display
depends on whether you are being notified of
a driving maneuver.
No notification of driving maneuver
Example illustration
:Distance to destination;Distance to next driving maneuver=Street you are currently driving on?Symbol for “follow the course of the road”Control system277Controls in detailBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 277Z     

Vehicle equipment
i This Operator’s Manual describes all
features, standard or optional, potentially
available for your vehicle at the time of
purchase. Please be aware that your
vehicle might not be equipped with all
features described in this manual.
The first 1000 miles (1500 km)
The more cautiously you treat your vehicle
during the break-in period, the more satisfied
you will be with its performance later on.
R Drive your vehicle during the first
1  000 miles (1  500 km) at varying but
moderate vehicle and engine speeds.
R During the first 1  000 miles (1  500 km), do
not exceed a speed of 85 mph
(140 km/h).
R During this period, avoid engine speeds
above 4  500 rpm in each gear.
R During this period, avoid heavy loads (full
throttle driving) and excessive engine
speeds (no more than  2
/ 3 of maximum rpm
in each gear).
R Shift gears in a timely manner.
R Avoid accelerating by kickdown.
R Do not attempt to slow the vehicle down by
shifting to a lower gear using the gear
selector lever.
R Select gear ranges  3, 2  or  1 (Y  page 266)
only when driving at moderate speeds (for
hill driving).
R Select  C as the preferred shift program
( Y  page 267) for the first 1  000 miles
(1  500 km).
After 1  000 miles (1  500 km) you may
gradually increase vehicle and engine speeds
to the permissible maximum.
All of the above instructions also apply when
driving the first 1  000 miles (1  500 km) after
the engine or the transmission has been
replaced.
i Always obey applicable speed limits.
At the gas station
Refueling
GWarning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact. Extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging your
health.
GWarning!
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gas to
spray back out when removing the fuel pump
nozzle, which could cause personal injury.
!  Never refuel vehicles with gasoline engine
with diesel fuel. Even small amounts of
diesel fuel will damage the fuel system and
engine. Damage resulting from the use of
non-approved fuels or fuel additives or
resulting from mixing gasoline with diesel
fuel is not covered by the Mercedes-Benz
Limited Warranty.
!  If you have accidentally filled the tank
with incorrect or non-approved fuel, do not
switch on the ignition. Otherwise the
incorrect or non-approved fuel will get into
the fuel lines. The fuel system must be
drained completely. Contact an authorized
Mercedes-Benz Center to have the fuel
system drained completely.
320At the gas stationOperation
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! To prevent damage to the catalytic
converters, only use premium unleaded
gasoline in this vehicle.
Any noticeable irregularities in engine
operation should be repaired promptly.
Otherwise, excessive unburned fuel may
reach the catalytic converter, causing it to
overheat and potentially start a fire.
i Only use premium unleaded gasoline with
a minimum Posted Octane Rating of 91
(average of 96 RON/86 MON).
Information on gasoline quality can
normally be found on the fuel pump. Please
contact gas station personnel in case
labels on the pump cannot be found.
For more information on gasoline, see
“Premium unleaded gasoline”
( Y  page 425), see “Fuel requirements”
( Y  page 427), or contact an authorized
Mercedes-Benz Center, or visit
http://www.MBUSA.com  (USA only).
Locking/unlocking the vehicle with the
SmartKey automatically locks/unlocks the
fuel filler flap.
i In case the central locking system does
not release the fuel filler flap, or the
opening mechanism is clamping, contact
Roadside Assistance or an authorized
Mercedes-Benz Center.
The fuel filler flap is located on the right-hand
side of the vehicle towards the rear.   XTurn off the engine.i Leaving the engine running and the fuel
filler cap open can cause the yellow engine
malfunction indicator lamp  ; to
illuminate.
For more information, see also “Practical
hints” ( Y page 394).XOpen the driver’s door. This puts the starter
switch in position  0, same as with the
SmartKey removed from the starter switch.
The driver’s door then can be closed again.
or
XRemove the SmartKey from the starter
switch.XOpening:  Press fuel filler flap  : at the
point indicated by the arrow.XTurn fuel filler cap  ; counterclockwise.XTake off fuel filler cap  ;.
! 
The fuel filler cap is tethered to the fuel
filler neck. Do not drop the cap. It could
damage the vehicle paint finish.
XSecure fuel filler cap  ; by clipping the
plastic tether into hook  = on the inside of
the fuel filler flap.XFully insert filler nozzle unit and refuel.XOnly fill your tank until the filler nozzle unit
cuts out –  do not top off or overfill .XClosing: Turn fuel filler cap  ; clockwise
until it audibly engages.
i Close the fuel filler flap before locking the
vehicle. Otherwise the flap locking pin will
prevent closing the fuel filler flap.
XClose fuel filler flap  :.
Check regularly and before a long trip
For information on quantities and
requirements of operating agents, see “Fuels,
coolants, lubricants, etc.” ( Y page 425).
Check the following:
R Engine oil level ( Y page 323)
R Tire inflation pressure ( Y page 329)
R Coolant level ( Y page 324)
At the gas station321OperationBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 321Z  

Display messagesPossible causes/consequences and M Solutions#The battery is no longer charging.     
Possible causes:
R alternator malfunctioning
R broken poly-V-belt
R a malfunction in the electronic systemXStop immediately in a safe location or as soon as it is safe to do
so and check the poly-V-belt.XIf it is broken:  Do not continue to drive. Otherwise the engine
will overheat due to an inoperative water pump which may result
in damage to the engine. Contact an authorized Mercedes-Benz
Center.XIf it is intact:  Drive to the nearest authorized Mercedes-Benz
Center immediately. Adjust driving to be consistent with
reduced braking responsiveness.4
Check Engine Oil 
At Next RefuelingThe engine oil has dropped to a critical level.  XCheck the engine oil level ( Y page 323) and add engine oil as
required ( Y page 323).XIf you must add engine oil frequently, have the engine checked
for possible leaks.
If the message  Check Engine Oil At Next Refueling  appears while the engine is running
and at operating temperature, the engine oil level has dropped to approximately the minimum
level.
The message will be stored in the vehicle status message memory after you have cleared it
from the multifunction display.
Visually check for oil leaks. If there are no obvious oil leaks, drive to the nearest service station
to refill your engine oil to the required level.
For information on approved engine oils contact an authorized Mercedes-Benz Center or visit
http://www.MBUSA.com  (USA only).
!  Engine oil level warnings should not be ignored. Extended driving with the symbol displayed
could result in serious engine damage that is not covered by the Mercedes-Benz Limited
Warranty.
Display messagesPossible causes/consequences and  M SolutionsCThe fuel level is low.XRefuel at the next gas station.8
Fuel Level LowThe fuel level has dropped below the reserve mark.  XRefuel at the next gas station.Vehicle status messages in the multifunction display383Practical hintsBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 383Z 

Only brake fluid approved by Mercedes-Benz
is recommended. Any authorized Mercedes-
Benz Center will provide you with additional
information.
Premium unleaded gasoline
GWarning!
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact. Extinguish all smoking materials.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging your
health.
!  To maintain the engine’s durability and
performance, premium unleaded gasoline
must be used.
If premium unleaded gasoline is not
available and low octane gasoline is used,
follow these precautions:
R Have the fuel tank only partially filled
with unleaded regular gasoline and fill up
with premium unleaded gasoline as soon
as possible.
R Avoid full throttle driving and abrupt
acceleration.
R Do not exceed an engine speed of
3  000 rpm if the vehicle is loaded with a
light load such as two persons and no
luggage.
R Do not exceed   2
/ 3  of maximum
accelerator pedal position if the vehicle
is fully loaded or operating in
mountainous terrain.
Fuel requirements
Only use premium unleaded gasoline. The
octane number (posted at the pump) must be
91 min. It is an average of both the Research
Octane Number (RON) and the Motor Octane
Number (MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Reformulated gasolines (RFG) and/or
unleaded gasoline containing oxygenates
such as ethanol, TAME, ETBE, IPA, IBA, and
TBA can be used provided the ratio of any one
of these oxygenates to gasoline does not
exceed 10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is not
allowed. Gasohol, which contains 10%
ethanol and 90% unleaded gasoline, can be
used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
Gasoline additives
A major concern among engine
manufacturers is carbon build-up caused by
gasoline. Mercedes-Benz recommends only
the use of quality gasoline containing
additives that prevent the build-up of carbon
deposits.
After an extended period of using fuels
without such additives carbon deposits can
build up, especially on the intake valves and
in the combustion area, leading to engine
performance problems such as:
R Warm-up hesitation
R Unstable idle
R Knocking/pinging
R Misfire
R Power loss
In areas where carbon deposits may be
encountered due to lack of availability of
gasoline which contains these additives, the
Fuels, coolants, lubricants, etc.427Technical dataBA 197 USA, CA Edition A 2011; 1; 27, en-UShereepeVersion: 3.0.3.52010-03-24T15:31:10+01:00 - Seite 427Z