The fuel filler flap is located on the right-hand
side of the vehicle towards the rear.
XTurn off the engine.
iLeaving the engine running and the fuel
filler cap open can cause the yellow fuel
tank reserve warning lamp to flash and the
malfunction indicator lamp ! (USA
only) or ; (Canada only) to illuminate.
For more information, see also “Practical
hints” (Y page 303).
XRemove the SmartKey from the starter
switch.
KEYLESS-GO: Open 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.
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.
XSet fuel filler cap ; on 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.
iClose the fuel filler flap before locking the
vehicle. Otherwise the flap locking pin will
prevent closing the fuel filler flap.
XClose fuel filler flap :.
Low outside temperatures (diesel
engine)
! Do not fill the tank with gasoline. Do not
blend diesel fuel with gasoline or kerosene.
The fuel system and engine will otherwise
be damaged, which is not covered by the
Mercedes-Benz Limited Warranty.
To prevent malfunctions, diesel fuel with
improved cold flow characteristics is offered
in the winter months. Check with your fuel
retailer.
Check regularly and before a long trip
For information on quantities and
requirements of operating agents, see “Fuels,
coolants, lubricants, etc.” (Y page 356).
Check the following:
REngine oil level (Y page 214)
RTire inflation pressure (Y page 221)
RCoolant level (Y page 216)
RVehicle lighting (Y page 311)
RWasher system and headlamp cleaning
system (Y page 217)
RBrake fluid (Y page 217)
Engine compartment
Hood
GWarning!
Do not pull the release lever while the vehicle
is in motion. Otherwise the hood could be
forced open by passing air flow.
212Engine compartmentOperation
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Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver’s door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also result
in handling or steering problems, or brake
failure.
Check the tire inflation pressure at least once
a month.
Check and adjust the tire inflation pressure
when the tires are cold ( Y page 219).
Checking tire inflation pressure
manually
Follow the steps below to achieve correct tire
inflation pressure:
XRemove the cap from the valve on one tire.XFirmly press a tire gauge onto the valve.XRead the tire inflation pressure on the tire
gauge and check against the
recommended tire inflation pressure on the
Tire and Loading Information placard on the
driver’s door B-pillar ( Y page 227). If
necessary, add air to achieve the
recommended tire inflation pressure.XIf you have overfilled the tire, release tire
inflation pressure by pushing the metal
stem of the valve with e.g. a tip of a pen.
Then recheck the tire inflation pressure
with the tire gauge.XInstall the valve cap.XRepeat this procedure for each tire.
Tire pressure loss warning system
(Canada only)
While the vehicle is being driven, the tire
pressure loss warning system monitors the
set tire inflation pressures by evaluating each
wheel’s rotational speed. This allows the
system to detect a significant loss of pressure
in a tire. If a wheel’s rotational speed changes
due to falling tire inflation pressure, you will
see a corresponding warning message in the
multifunction display.
The tire pressure loss warning system may
function in a restricted manner or with a delay
R when snow chains are mounted to the
vehicle
R in the presence of ice and snow
R when you are driving on a loose surface
(e.g. sand or gravel)
R when you are driving in a very sporty
manner (involving rapid acceleration or
high speeds in curves)GWarning!
When the multifunction display shows the
message Tire Pressure Check Tires , one
or more of your tires are significantly
underinflated. You should stop and check
your tires as soon as possible, and inflate
them to the proper tire inflation pressure as
indicated on the vehicle’s Tire and Loading
Information placard or on the tire inflation
pressure label.
Driving on a significantly underinflated tire
causes the tire to overheat and can lead to
tire failure. Underinflation also reduces fuel
efficiency and tire tread life, and may affect
the vehicle’s handling and stopping ability.
Each tire, including the spare, should be
checked at least once a month when cold.
Inflate the tires to the recommended tire
inflation pressure as specified on
R the Tire and Loading Information placard on
the driver’s door B-pillar
or
R the tire inflation pressure label located on
the inside of the fuel filler flap
222Tires and wheelsOperation
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SmartKey with KEYLESS-GO
XMove locking tab : in the direction of
arrow.
XSlide mechanical key ; out of the housing.
Unlocking the driver’s door
XInsert mechanical key ; into the driver’s
door lock.
XTurn mechanical key ; counterclockwise
to position 1.
XPull the door handle past the resistance
point until the locking knob moves up.
The driver’s door is unlocked.
XPull the door handle once more to open the
driver’s door.
XTurn mechanical key ; back and remove
it from the driver’s door lock.Locking the vehicle
If you cannot lock the vehicle with the
SmartKey or with KEYLESS-GO, lock it as
follows:
XClose the front passenger door, the right
rear door, and the tailgate.
XOpen the driver’s door and the rear left
door.
XPress the central locking switch
(Y page 75).
The locking knobs of the front passenger
door and the rear doors move down.
XIf the vehicle battery is disconnected or
drained: Press down the locking knobs on
the front passenger door and the rear
doors.
XExit the vehicle.XClose the driver’s door.XEnter the vehicle through the rear left door.XPress down the locking knob of the driver’s
door.
! To prevent inadvertent lockout, make
sure to have the SmartKey with you before
proceeding with the next step. The next
step will lock the vehicle.
XExit the vehicle.XClose the rear left door.
The vehicle is locked.
iThis procedure does not arm the anti-
theft alarm system, nor does it lock the fuel
filler flap.
Unlocking and opening the tailgate
If the tailgate can no longer be unlocked and
opened using button F on the SmartKey
or the KEYLESS-GO function, use the
emergency release lever to unlock and open
the tailgate.
The emergency release lever is located on the
inside of the tailgate.
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A minimum height clearance of 7.2 ft
(2.20 m) is required to open the tailgate.
XRemove cover ; from the trim on the
tailgate.
XPush emergency release lever : all the
way to the left.
! The tailgate swings open upwards
automatically. Always make sure there is
sufficient overhead clearance.
XOpen the tailgate.
iIf the vehicle has previously been locked
from the outside using the SmartKey or
KEYLESS-GO, opening the tailgate from the
inside using the emergency release lever
will trigger the anti-theft alarm system.
To cancel the alarm, do one of the
following:RInsert the SmartKey into the starter
switch.
RPress button % or & on the
SmartKey.
In vehicles with KEYLESS-GO:RPull an outside door handle.
The SmartKey must be within 3 ft (1 m)
of the vehicle.
RPress the KEYLESS-GO start/stop
button.
The SmartKey must be inside the vehicle.
XReinstall cover ;.Fuel filler flapGWarning!
HYBRID vehicles: It is imperative that you read
the HYBRID Supplemental Operating
Instructions included in your vehicle literature
portfolio. You may otherwise not recognize
potential danger.
GWarning!
Avoid contact with the vehicle walls as they
may contain sharp edges. Otherwise, you
could injure yourself while releasing the fuel
filler flap.
In case the central locking system does not
release the fuel filler flap, you can open it
manually.
The fuel filler flap release is located on the
passenger side in the cargo compartment
behind the cover.
XOpen the tailgate (Y page 75).XOpen the cover on the passenger-side trim
panel (Y page 316).
XPull yellow fuel filler flap release : in
direction of arrow.
The fuel filler flap is unlocked.
XOpen the fuel filler flap (Y page 210).XClose the cover.XClose the tailgate.308Unlocking/locking manuallyPractical hints
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