Keep batteries out of the reach of children.
Seek medical attention immediately if a
battery is swallowed. G
WARNING
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. Observe
government disposal guidelines. California
residents, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Checking the battery X
Press the 0037or0036 button.
The SmartKey battery is working properly if
battery check lamp 0043lights up briefly.
If battery check lamp 0043does not light up
briefly during the test, the SmartKey battery
is discharged.
X Changing the battery (Y page 64)
i The battery can be obtained from any
authorized Mercedes-Benz Center.
i If the SmartKey battery is checked within
the signal range of the vehicle, pressing the
0037 or0036 button locks or unlocks the
vehicle.
Replacing the battery X
Take the mechanical key out of the
SmartKey (Y page 63).
You require a CR 2025 3 V cell battery. X
Press mechanical key 0044into the opening
in the SmartKey in the direction of the
arrow until battery tray cover 0043opens. Do
not hold the cover closed while doing so. X
Remove the cover of the battery tray.
X Repeatedly tap the SmartKey against your
palm until battery 0087falls out.
X Insert the new battery with the positive
terminal facing upwards. Use a lint-free
cloth to do so.
X Insert the front tabs of the battery tray's
cover first, and then press to close it.
X Check the function of all SmartKey buttons
on the vehicle. 64
SmartKeyOpening and closing
Doors
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts. G
WARNING
Do not carry heavy or hard objects in the
passenger compartment or trunk unless they
are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident Unlocking and opening the doors
from the outside
Coupe !
The doors swing upwards and out when
opened. Therefore, make sure that there is
sufficient clearance above the vehicle. X
To open the door: point the SmartKey
towards door handle 0043.
X Press the 0036button on the SmartKey.
Door handle 0043moves out.
X Lift the door by door handle 0043and swing
it up as far as it will go.
X To close the door: pull the door
downwards by the outer edge or the interior
door handle. Swing the door down gently
and allow it to engage in the lower position.
X Lock the vehicle with the SmartKey if
necessary (Y page 62).
Roadster X
To open the door: point the SmartKey
towards door handle.
X Press the 0036button on the SmartKey.
The door is unlocked and can be opened.
X Pull the door handle. Doors
67Opening and closing Z
X
Take the mechanical key out of the
SmartKey (Y page 63).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. 0043
Button for extending the handle
X Turn the mechanical key clockwise as far
as it will go to position 0047.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the trunk lid
are locked.
X Insert the mechanical key into the
SmartKey.
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed. Trunk
Important safety notes
G
WARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts. G
WARNING
Make sure the trunk lid is closed when the
engine is running and while driving. Among
other dangers, deadly carbon monoxide (CO)
gases may enter the vehicle interior resulting
in unconsciousness and death.
! The temperature in the trunk may be high.
For this reason, do not store any
temperature-sensitive objects in the trunk. Trunk
71Opening and closing Z
!
The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
Coupe: to fully open the trunk lid, a minimum
height of 5.5 ft (1.68 m) from the ground is
necessary.
Roadster: to fully open the trunk lid, a
minimum height of 5.7 ft (1.75 m) from the
ground is necessary.
The trunk lid can be:
R opened automatically from outside
R opened automatically from inside
R locked separately
R unlocked with the mechanical key
R opened with the emergency release button Opening/closing the trunk
Opening/closing from outside Opening
X
Press the 0054button on the SmartKey.
The trunk lid opens slightly. X
Reach into the gap and pull up the trunk lid.
Closing G
WARNING
To prevent possible personal injury, always
keep hands and fingers away from the trunk
opening when closing the trunk lid. Be
especially careful when small children are
around. X
Push the trunk lid down until it engages.
Use handle 0043to pull down the trunk lid if
necessary.
X If necessary, lock the vehicle with the
0037 button on the SmartKey.
Opening the trunk from inside the
vehicle You can open the tailgate from the driver's
seat when the vehicle is stationary.
X
Press trunk lid remote control button 0043.
The trunk lid opens slightly. Locking the trunk separately
You can lock the trunk separately. If you then
unlock the vehicle centrally, the trunk
remains locked and cannot be opened.
X Close the trunk lid.
X Take the mechanical key out of the
SmartKey (Y page 63).72
TrunkOpening and closing
features. If, in automatic operation mode, a
side window encounters an obstruction that
blocks its path, the anti-entrapment feature
will stop the side window and open it slightly.
The side windows operate differently when
the switch is pulled and held. These details
can be found in the "Closing a blocked side
window" section in this chapter.
The closing of the side windows can be
immediately halted by releasing the switch or,
if the switch was pulled past the resistance
point and released, by pressing or pulling the
respective switch.
If a side window encounters an obstruction
that blocks its path when you are closing the
side windows by pressing and holding the
0037 button on the SmartKey, the anti-
entrapment feature will not operate. G
WARNING
Do not keep any part of your body up against
the window pane when opening a window. The
downward motion of the pane may pull that
part of your body down between the window
pane and the door frame and trap it there. If
there is a risk of entrapment, release the
switch and pull it to close the window.
Observe the important safety notes in the
"Children in the vehicle" section (Y page 51). Opening and closing the side
windows
0043
Left side window
0044 Right side window
The switches for both side windows are
located on the driver's door. There is also a
switch for the front-passenger side window
on the front-passenger door.
The switches on the driver's door take
precedence.
X Select key position 2with the Start/Stop
button (Y page 113).
X To open: press corresponding switch 0043
or 0044.
X To close: pull corresponding switch 0043
or 0044.
i If you press the switch beyond the point
of resistance, an automatic opening/
closing process is started in the
corresponding direction. You can stop
automatic operation by operating the
switch again.
i You can continue to operate the side
windows after you switch off the engine.
This function is available for up to five
minutes or until the driver's or front-
passenger door is opened. 74
Side windowsOpening and closing
Seats
Important safety notes
G
WARNING
In order to avoid possible loss of vehicle
control, the following must be done before the
vehicle is put into motion:
R seat adjustment
R steering wheel adjustment
R rear-view mirror adjustment
R fastening of seat belts G
WARNING
In order to avoid possible loss of vehicle
control, all seat, head restraint, steering
wheel and rear view mirror adjustments, as
well as fastening of seat belts, must be done
before setting the vehicle in motion. G
WARNING
Do not adjust the driver's seat while driving.
Adjusting the seat while driving could cause
the driver to lose control of the vehicle.
Never travel in a moving vehicle with the seat
backrest in an excessively reclined position as
this can be dangerous. You could slide under
the seat belt in a collision. If you slide under
it, the seat belt would apply force at the
abdomen or neck. This could cause serious or
fatal injuries. The seat backrest and seat belts
provide the best restraint when the wearer is
in a position that is as upright as possible and
seat belts are properly positioned on the
body. G
WARNING
Your seat belt must be adjusted so that you
can correctly fasten your seat belt.
Observe the following points:
R adjust the seat backrest until your arms are
slightly angled when holding the steering
wheel.
R adjust the seat to a comfortable seating
position that still allows you to reach the accelerator/brake pedal safely. The
position should be as far back as possible
with the driver still able to operate the
controls properly.
R adjust the head restraint so that it is as
close to the head as possible and the center
of the head restraint supports the back of
the head at eye level.
R never place hands under the seat or near
any moving parts while a seat is being
adjusted.
Failure to do so could result in an accident
and/or serious personal injury. G
WARNING
The electrically adjustable seats can be
operated at any time. Therefore, do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. A child's
unsupervised access to a vehicle could result
in an accident and/or serious personal injury. G
WARNING
Children 12 years old and under must be
seated and properly secured in an
appropriately sized infant restraint, toddler
restraint or booster seat recommended for
the size and weight of the child. For additional
information, see section "Children in the
vehicle".
A child's risk of serious or fatal injuries is
significantly increased if the child restraints
are not properly secured in the vehicle and/
or the child is not properly secured in the child
restraint.
! To avoid damage to the seats and the seat
heating, observe the following information:
R do not spill any liquids on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
R if the seat covers are damp or wet, do not
switch on the seat heating. The seat
heating should also not to be used to dry
the seats. Seats
83Seats, steering wheel and mirrors Z
i
If the battery voltage is too low, AIRSCARF
may switch off. Steering wheel
Important safety notes
G
WARNING
Do not adjust the steering wheel while driving.
Adjusting the steering wheel while driving
could cause the driver to lose control of the
vehicle.
The electrical steering wheel adjustment
feature can be operated at any time.
Therefore, do not leave children unattended
in the vehicle, or with access to an unlocked
vehicle. A child's unsupervised access to a
vehicle could result in an accident and/or
serious personal injury. Adjusting the steering wheel
0043
To adjust the steering wheel position
(fore-and-aft adjustment)
0044 To adjust the steering wheel height
i Other topics:
R EASY-ENTRY/EXIT feature
(Y page 86)
R Storing settings (Y page 89) EASY-ENTRY/EXIT feature
Important safety notes The EASY-ENTRY/EXIT feature makes getting
in and out of your vehicle easier.
You can activate and deactivate the EASY-
ENTRY/EXIT feature in the on-board
computer (Y
page 156). G
WARNING
You must make sure no one can become
trapped or injured by the moving steering
wheel when the easy-entry/exit feature is
activated.
To stop steering wheel movement, move
steering wheel adjustment stalk or press the
memory position switch.
Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Children could open the driver's door and
unintentionally activate the easy-entry/exit
feature, which could result in an accident
and/or serious personal injury. G
WARNING
Let the system complete the adjustment
procedure before setting the vehicle in
motion. All steering wheel adjustment must
be completed before setting the vehicle in
motion. Driving off with the steering wheel
still adjusting could cause the driver to lose
control of the vehicle.
Position of the steering wheel when the
EASY-ENTRY/EXIT feature is active The steering wheel swings upwards when
you:
R
remove the SmartKey from the ignition lock
R open the driver's door with the KEYLESS-
GO start function in position 1
R open the driver's door and the SmartKey is
in position 0or 1in the ignition lock
i The steering wheel only moves upwards if
it has not already reached the upper end
stop. 86
Steering wheelSeats, steering wheel and mirrors
005A
To remove the SmartKey
0047 Power supply for some consumers, such
as the windshield wipers
0048 Ignition (power supply for all consumers)
and drive position
0049 To start the engine
i The SmartKey can be turned in the
ignition lock even if it is not the correct
SmartKey for the vehicle. The ignition is not
switched on. The engine cannot be started. Starting the engine
Important safety notes G
WARNING
If children are left unsupervised in the vehicle,
they could:
R open the doors, thus endangering other
people or road users.
R get out and disrupt traffic.
R operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
R release the parking brake.
R shift the automatic transmission out of
parking position P.
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces
without sufficient ventilation. i
Do not depress the accelerator pedal
when starting the engine.
Starting procedure with the Start/Stop
button i
The Start/Stop button can be used to
start the vehicle without inserting the
SmartKey into the ignition lock. You merely
need to carry the SmartKey on your person.
X Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button (Y page 113)
once.
The engine starts.
Starting procedure with the SmartKey If the Start/Stop button is inoperative, you
can also start the vehicle using the SmartKey
in the ignition lock.
X
Turn the SmartKey to position 3in the
ignition lock (Y page 113) and release it as
soon as the engine is running. Pulling away
AMG SPEEDSHIFT DCT 7-speed sports
transmission G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
i It is only possible to shift the transmission
from position Pto the desired position, if:
R the engine is running and
R you depress the brake pedal
Only then is the parking lock released. If the
brake pedal is not depressed, the E-SELECT 114
DrivingDriving and parking