You can select between the following states
of ESP ®
:
R ESP ®
is activated.
R SPORT handling mode is activated.
R ESP ®
is deactivated. G
WARNING
When SPORT handling mode is activated,
there is a greater risk of skidding and
accidents.
Only activate SPORT handling mode in the
situations described in the following. G
WARNING
If you deactivate ESP ®
, ESP ®
no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP ®
in the situations
described in the following.
In the following situations, it may be better to
activate SPORT handling mode or deactivate
ESP ®
:
R when using snow chains
R in deep snow
R on sand or gravel
R when driving on designated roads when the
vehicle's own oversteering and
understeering characteristics are desired
Driving in SPORT handling mode or without
ESP ®
requires an extremely qualified and
experienced driver.
i Activate ESP ®
as soon as the situations
described above no longer apply. ESP ®
will
otherwise not be able to stabilize the
vehicle if the vehicle starts to skid or a
wheel starts to spin.
! Avoid spinning the driven wheels for an
extended period with ESP ®
deactivated.
You could otherwise damage the drivetrain. Deactivating/activating ESP
® X
To activate SPORT handling mode:
briefly press button :.
The M warning lamp in the instrument
cluster lights up. The SPORT handling SPORT handling
mode
mode message appears in the multifunction
display.
X To deactivate SPORT handling mode:
briefly press button :.
The M warning lamp in the instrument
cluster goes out. ESP ®
is activated.
X To deactivate ESP ®
:press and hold down
button :until the handå warning
lamps in the instrument panel light up.
The OFF OFF message appears in the
multifunction display.
X To activate ESP ®
:when SPORT handling
mode is activated or ESP ®
is deactivated,
press button :briefly.
The h andå warning lamps in the
instrument cluster go out. The ON
ONmessage
appears in the multifunction display.
Characteristics of activated SPORT
handling mode
SPORT handling mode raises the intervention
threshold for stabilizing the vehicle. This
allows for a sportier driving style on
designated race circuits and may in certain
situations improve the traction in comparison
with ESP ®
.
If SPORT handling mode is activated and one
or more wheels start to spin, the h
warning lamp in the instrument cluster Driving safety systems
57Safety Z
ProCarManuals.com
X
To arm: lock the vehicle with the
SmartKey.
The tow-away alarm is armed after
approximately 30 seconds.
X To deactivate: unlock the vehicle with the
SmartKey.
The tow-away alarm is deactivated
automatically.
To prevent a false alarm, deactivate the tow-
away alarm manually if your vehicle:
R is being transported
R is being loaded onto a ferry or car
transporter, for example
R is parked on a movable surface, e.g. in a
split-level garage
X To deactivate: use the Start/Stop button
to set SmartKey position 0.
or
X Remove the SmartKey from the ignition
lock. X
Press button :.
Indicator lamp ;lights up briefly.
X Lock the vehicle with the SmartKey.
The tow-away alarm is deactivated.
The tow-away alarm remains deactivated
until the vehicle is unlocked and locked
again. 60
Theft deterrent locking systemSafety
ProCarManuals.com
When it is dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 155).
You can also set an audible signal to confirm
that the vehicle has been locked or unlocked.
The audible signal can be activated and
deactivated using the on-board computer
(Y page 156).
X To unlock centrally: press the%
button.
If you do not open the vehicle within
approximately 40 seconds of unlocking:
R the vehicle is locked again.
R the anti-theft alarm system is armed again.
X To lock centrally: press the&button. Changing the settings of the locking
system
You can change the setting of the locking
system in such a way that only the driver's
door and the fuel filler flap are unlocked. This
is useful if you frequently travel on your own.
X To change the setting: press and hold
down the %and& buttons
simultaneously for approximately six
seconds until the battery check lamp
(Y page 64) flashes twice.
The SmartKey now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the%
button twice.
X To lock centrally: press the&button. Restoring the factory settings
X Press the %and& buttons
simultaneously for approximately six
seconds until the battery check lamp
flashes twice. Mechanical key
General notes If the vehicle can no longer be locked or
unlocked with the SmartKey, use the
mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (Y
page 58).
There are several ways to turn off the alarm:
X Press the %or& button on the
SmartKey.
or
X Insert the SmartKey into the ignition lock.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch :in the direction of
the arrow and at the same time remove
mechanical key ;from the SmartKey. SmartKey battery
Important safety notes Have the batteries changed at a qualified
specialist workshop.
G
WARNING
Batteries contain toxic substances.
Swallowing batteries can lead to serious
health issues or death. SmartKey
63Opening and closing
Z
ProCarManuals.com
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 &or% button.
The SmartKey battery is working properly if
battery check lamp :lights up briefly.
If battery check lamp :does 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
& or% 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 ;into the opening
in the SmartKey in the direction of the
arrow until battery tray cover :opens. 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 =falls 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
ProCarManuals.com
Problem Possible causes/consequences and
M
MSolutions The engine cannot be
started using the
SmartKey. The on-board voltage is too low.
X
Switch off non-essential consumers, such as seat heating or
interior lighting, and try to start the engine again.
X Remove the SmartKey and reinsert it into the ignition lock.
X Start the engine within 30 seconds of inserting the SmartKey
into the ignition lock.
X Repeat if necessary.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 236).
or
X Jump-start the vehicle (Y page 240).
or
X Consult a qualified specialist workshop. The SmartKey cannot
be turned in the ignition
lock. The SmartKey has been in position
0for a considerable time.
X Remove the SmartKey and reinsert it into the ignition lock.
X Check the starter battery and charge it if necessary
(Y page 236).
X Start the engine. The on-board voltage is too low.
X
Switch off nonessential consumers, such as seat heating or
interior lighting, and try to turn the SmartKey again.
If this does not work:
X Check the starter battery and charge it if necessary
(Y page 236).
or
X Jump-start the vehicle (Y page 240).
or
X Consult a qualified specialist workshop. 66
SmartKeyOpening and closing
ProCarManuals.com
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 :.
X Press the %button on the SmartKey.
Door handle :moves out.
X Lift the door by door handle :and 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 %button on the SmartKey.
The door is unlocked and can be opened.
X Pull the door handle. Doors
67Opening and closing Z
ProCarManuals.com
Unlocking and opening doors from
the inside
Coupe You can only open a door from the inside if it
is unlocked.
The vehicle locks the doors automatically,
when you drive faster than 9 mph
(15 km/h).
The doors are automatically unlocked after a
journey if you switch off the engine.
! The doors swing upwards and out when
opened. Therefore, make sure that there is
sufficient clearance above the vehicle. X
To unlock the door manually: press
the % button of central locking =.
or
X Pull locking knob :upwards.
X To open the door: pull handle;.
X Swing the door upwards as far as it will go.
X To close the door: pull the door down by
handle ?.
X Allow the door to engage in the lower
position.
X To lock the door manually: press
the & button of central locking =.
or
X Push locking knob :downwards.
Roadster You can open a door from inside the vehicle
even if it has been locked. Only open the door when the traffic situation
permits.
X
Pull door handle ;.
If the door is locked, locking knob :pops
up. The door is unlocked and can be
opened.
i When a door is opened, the side window
on that side opens slightly. When the door
is closed, the triangular window closes
again.
! The side windows will not open/close if
the battery is discharged or if the side
windows have iced up. It will then not be
possible to close the door. Do not attempt
to force the door closed. You could
otherwise damage the door or the side
window. Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. This feature may be useful if,
for example, you wish to unlock the front-
passenger door from the inside or lock the
vehicle before you pull away.
Coupe: the central locking/unlocking button
does not lock or unlock the fuel filler flap.
Roadster: the central locking/unlocking
button does not lock or unlock the fuel filler
flap or the stowage compartments, such as
the glove box. 68
DoorsOpening and closing
ProCarManuals.com
Coupe
X
To unlock: insert the mechanical key into
the lock of the driver's door as far as it will
go.
X Turn the mechanical key clockwise to
position 2.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X To open the door: press button:.
The handle moves out slightly from the
door.
X Pull the handle out as far as it will go.
X Swing the door upwards by the handle.
Roadster X
Turn the mechanical key counter-clockwise
to position 1.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the
SmartKey. Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey, use the mechanical key.
Coupe :
Button for extending the handle
X To lock: lock the front-passenger door
manually from the inside ( Ypage 68).
X Leave the vehicle and close the driver's
door.
X Insert the mechanical key into the lock of
the driver's door as far as it will go.
X Turn the mechanical key counter-clockwise
to position 3.
The door is locked.
X Turn the mechanical key back and remove
it.
X Check that both doors are locked.
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed.
Roadster X
Open the driver's door.
X Close the front-passenger door and the
trunk lid.
X Press the locking button (Y page 68).
X Check that the locking knob is in the lower
position on the front-passenger door. Press
the locking knob down by hand, if
necessary.
X Close the driver's door. 70
DoorsOpening and closing
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