out by qualified technicians only. Contact an
authorized Mercedes-Benz Center for further
information.
The electro-hydraulic brake system must be
deactivated prior to working on the system.
High pressure is intermittently built up in the
system as part of its automatic self-test.
In addition, the system is automatically
activated when the vehicle is unlocked by
remote control, when the driver or passenger
door is opened, when the SmartKey in the
starter switch is turned to position 1 or the
KEYLESS-GO start/stop button is pressed
once, when the brake pedal is depressed or
when the parking brake is released. Failure to
deactivate the system prior to maintenance
will cause brake pistons to extend and brake
fluid to leak, which may result in injuries
(contusions and acid burns). Extended brake
pistons may also cause injury.
The electro-hydraulic brake system switches
off automatically
R approximately 2 minutes after you turned
the SmartKey in the starter switch to
position 0 or removed the SmartKey
R approximately 2 minutes after you pressed
the KEYLESS-GO start/stop button to turn
off the engine or power supply and opened
the driver’s door (with driver’s door open,
the starter switch is set to position 0, same
as SmartKey removed from starter switch)
R approximately 20 seconds after you locked
the vehicle from outside
For more information on your vehicle’s
brakes, see the “Driving instructions” section
( Y page 210).
Anti-theft systems
Immobilizer
The immobilizer prevents unauthorized
persons from starting your vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. The
engine can be started by anyone with a valid
SmartKey that is left inside the vehicle.
ActivatingXWith SmartKey: Remove the SmartKey
from the starter switch.XWith KEYLESS-GO: Turn off the engine and
open the driver’s door.
Deactivating
XSwitch on the ignition.
i Starting the engine will also deactivate
the immobilizer.
In the event that the engine cannot be
started (yet the vehicle’s battery is
charged), the system is not operational.
Contact an authorized Mercedes-Benz
Center or call 1-800-FOR-MERCedes (in the
USA) or 1-800-387-0100 (in Canada).
Anti-theft alarm system
Once the alarm system has been armed, a
visual and audible alarm is triggered when
someone opens
R a door
R the trunk
R the hood
R a storage compartment in the rear
R the glove box
R the storage compartment under the
armrest
The alarm will stay on even if the activating
element, a door, for example, is closed
immediately.
The alarm system will also be triggered when
R the vehicle is raised (tow-away alarm)
R the vehicle is opened with the mechanical
key
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you cannot shut a door, do not force it or
you could damage the door or the window.
Fix whatever is affecting the window before
trying to shut the door.
i USA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful interference, and
2. this device must accept any interference received, including
interference that may cause undesired
operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
i Canada only:
This device complies with RSS-210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interference,
and
2. this device must accept any interference received, including
interference that may cause undesired
operation of the device.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
Important notes on using KEYLESS-GO
R You can also use the SmartKey with
KEYLESS-GO like a normal SmartKey
( Y page 68).
R You can combine KEYLESS-GO functions
with normal SmartKey functions (e.g.
unlocking with KEYLESS-GO and locking
with button &).
R Always carry the SmartKey with you.
R Never store the SmartKey together with
-electronic items such as a mobile phone
or another SmartKey
- metallic objects such as coins or metal
foil
Doing so could impair the function of the
KEYLESS-GO system.
R To lock or unlock the vehicle, the SmartKey
must be located outside the vehicle within
approximately 3 ft (1 m) of a door or the
trunk.
R When the vehicle has been parked for more
than 72 hours, the KEYLESS-GO function is
deactivated. Pull an outside door handle
and switch on the ignition once to activate
the KEYLESS-GO function.
R If the SmartKey is positioned farther away
from the vehicle, the system may no longer
recognize the SmartKey. The vehicle
cannot be locked or the engine started via
the KEYLESS-GO system.
R If the SmartKey is removed from the vehicle
while the engine is running (e.g. if a
passenger exits the vehicle with the
SmartKey), the message Key Not
Detected appears in the multifunction
display while driving off.
Find the SmartKey or change its present
location immediately (e.g. place it on the
passenger seat or insert it in shirt pocket).
R If you have started the engine with the
KEYLESS-GO start/stop button, you can
only turn it off again with this button, even
if you have put the SmartKey in the starter
switch in the meantime.
R This does not apply if, after starting, the
automatic transmission is still in park
position P and the SmartKey is then
inserted in the starter switch. The
SmartKey will then have priority over the
KEYLESS-GO function and the vehicle’s
electrical system will operate according to
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RThe vehicle could be inadvertently
unlocked if the SmartKey is within 3 ft (1 m)
of the vehicle and
-an outside door handle is splashed with
water
or
-you attempt to clean an outside door
handle
RRemember that the engine can be started
by anyone with a SmartKey that is left
inside the vehicle. If you leave the
SmartKey behind when exiting and locking
the vehicle, the message Key Detected
In Vehicle appears in the multifunction
display.
Factory setting
XGlobal unlocking: Grasp an outside door
handle.
Unless you open a door or the trunk within
approximately 40 seconds after unlocking
the vehicle:
RThe vehicle will be locked again.
RThe anti-theft alarm system will be
rearmed.
XGlobal locking: Press lock button : on an
outside door handle.
Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey. Grasping the
driver’s outside door handle will then only
unlock the driver’s door, interior lockable
storage compartments, and the fuel filler flap.
XSwitching on/off: Press and hold buttons
% and & simultaneously for
approximately 6 seconds until the battery
check lamp (Y page 71) flashes twice.
KEYLESS-GO will then function as follows:
XUnlocking driver’s door and fuel filler
flap: Grasp the driver’s outside door
handle.
XGlobal unlocking: Grasp the outside door
handle on the passenger side.
XGlobal locking: Press lock button : on an
outside door handle.
Checking SmartKey batteries
Example illustration: SmartKey with KEYLESS-GO
XPress button & or % on the
SmartKey.
Battery check lamp : comes on briefly to
indicate that the SmartKey batteries are in
order.
If the battery check lamp does not come on
briefly during check, the SmartKey batteries
are discharged.
XReplace the batteries (Y page 269).
iYou can obtain the required batteries at
any authorized Mercedes-Benz Center.
iIf the batteries are checked within signal
range of the vehicle, pressing button
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Automatic central locking
You can switch the automatic central locking
on or off using the control system
(Y page 126).
The doors and the trunk lock automatically
when the vehicle is set into motion.
You can open a locked door from the inside.
Open door only when conditions are safe to
do so.
The doors are designed to unlock
automatically after an accident if the force of
the impact exceeds a preset threshold.
The vehicle locks automatically when the
ignition is switched on and the wheels are
turning at a vehicle speed of above 9 mph
(15 km/h). You could therefore lock yourself
out when the vehicle is pushed or towed or is
on a test stand.
Locking and unlocking from the inside
GObserve Safety notes, see page 51.
You can lock or unlock the vehicle from the
inside using the central locking or unlocking
switch. This can be useful, for example, if you
want to lock the vehicle before starting to
drive.
The central locking or unlocking switch does
not lock or unlock the fuel filler flap or the
interior storage compartments, such as the
glove box.
XLocking: Press central locking switch :.
When all doors are closed, the vehicle
locks.
XUnlocking: Press central unlocking
switch ;.
You can open a locked door from the inside.
Open door only when conditions are safe to
do so.
If the vehicle was previously locked with the
central locking switch
Rand the SmartKey is set to factory settings,
the complete vehicle is unlocked when a
door is opened from the inside
Rand the SmartKey is set to selective
settings, only the door opened from inside
is unlocked
If the vehicle has been locked centrally with
the SmartKey or with KEYLESS-GO, it will not
unlock using the central unlocking switch.
Opening the trunk
GWarning!
Make sure the trunk is closed when the engine
is running and while driving. Among other
dangers, deadly carbon monoxide (CO) gases
may enter vehicle interior resulting in
unconsciousness and death.
! When you open the trunk, the trunk lid
swings open upwards. Always make sure
there is sufficient overhead clearance.
You can open the trunk when the vehicle is
stationary and the retractable hardtop is fully
opened or closed.
A minimum height clearance of 6.2 ft (1.88 m)
is required to open the trunk lid.
iTo facilitate trunk loading and unloading
when the hardtop is retracted, you can
raise the hardtop from its storage position
in the trunk using the load assist feature
(Y page 164). You may also unhook the
luggage cover.
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Closing the trunkGWarning!
Make sure the trunk is closed when the engine
is running and while driving. Among other
dangers, deadly carbon monoxide (CO) gases
may enter vehicle interior resulting in
unconsciousness and death.
GWarning!
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.
GObserve Safety notes, see page 51.
Do not leave the SmartKey in the open trunk.
You may lock yourself out.
If the vehicle was previously locked centrally
with the SmartKey or KEYLESS-GO, the trunk
lid will lock automatically when closed. All
turn signal lamps flash three times and an
acoustic signal sounds three times to confirm
locking.
iWhen the hardtop is retracted, it must be
completely lowered in the trunk before the
trunk can be closed (Y page 155).
Closing the trunk from the outside
manually
XLower trunk lid by pulling on handle :
firmly.
XClose trunk with hands placed flat on trunk
lid.
The power closing assist automatically
ensures that the trunk lid is pulled completely
close (Y page 78).
Closing the trunk from the inside
automatically
GWarning!
Maintain sight of the area around the rear of
the vehicle while operating the trunk lid with
the door mounted switch. Monitor the closing
procedure carefully to make sure no one is in
danger of being injured.
To interrupt the closing procedure, release
the door mounted remote trunk opening/
closing switch again.
Even with the SmartKey removed from the
starter switch or the SmartKey with KEYLESS-
GO removed from the vehicle, the remote
trunk opening/closing switch can be
operated. 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.
In vehicles with trunk opening/closing
system you can close the trunk from the
inside using the remote trunk opening/
closing switch.
If the trunk lid comes into contact with an
object while closing, the closing procedure is
stopped and the trunk lid reopens slightly.
This will happen only while the trunk is in its
upper motion sequence. Check if luggage has
been piled too high, for example.
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Power closing assist for trunk lid
It is not necessary to slam the trunk lid
closed. An electrical power-assisted
mechanism draws the trunk lid closed quietly
and automatically once the trunk lid has been
latched. When the electrical power-assisted
mechanism has stopped, the trunk can be
reopened.
GWarning!
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.
In case of danger, pull the inside or outside
door handle, or press the trunk lid lock.
To prevent personal injury, never actuate the
closing assist mechanism by tampering with
the door or trunk lid latch.
GWarning!
Make sure the trunk is closed when the engine
is running and while driving. Among other
dangers, deadly carbon monoxide (CO) gases
may enter vehicle interior resulting in
unconsciousness and death.
XPress the trunk lid gently into its lock.Starter switch positions
SmartKey
GObserve Safety notes, see page 51.
Starter switch
gFor removing SmartKey (gear selector
lever must be in park position P)
1Power supply for some electrical
consumers, e.g. wipers
2Ignition (power supply for all electrical
consumers) and driving position
3Starting position
When you switch on the ignition, all lamps in
the instrument cluster come on. The high-
beam headlamp indicator lamp and turn
signal indicator lamps will only come on if
activated. If a lamp in the instrument cluster
fails to come on when the ignition is switched
on, have it checked and replaced if necessary.
If a lamp in the instrument cluster remains on
after starting the engine or comes on while
driving, refer to “Lamps in instrument cluster”
(Y page 254).
XAlways remove the SmartKey from the
starter switch when the engine is not in
operation.
This will help to prevent accelerated vehicle
battery discharge or a completely
discharged vehicle battery.
If the SmartKey cannot be turned in the
starter switch, the vehicle battery may not be
sufficiently charged.
XCheck the vehicle battery and charge it if
necessary (Y page 285).
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orXGet a jump start (Y page 285).
KEYLESS-GO
GObserve Safety notes, see page 51.
Vehicles equipped with the KEYLESS-GO
feature are supplied with a SmartKey with
integrated KEYLESS-GO function.
The SmartKey must be present in the vehicle.
Pressing the KEYLESS-GO start/stop button
without depressing the brake pedal
corresponds to the various starter switch
positions (Y page 78).
Pressing the KEYLESS-GO start/stop button
with the brake pedal firmly depressed will
start the engine (Y page 98).
The function of the SmartKey overrules the
KEYLESS-GO function.
XMake sure the automatic transmission is in
park position P.
XDo not depress the brake pedal.
KEYLESS-GO start/stop button
:USA only;Canada only
Position 0
Before you press the KEYLESS-GO start/stop
button, the vehicle’s on-board electronics
have status 0 (as with SmartKey removed).
Position 1XPress the KEYLESS-GO start/stop button
once.
This supplies power for some electrical
consumers, e.g. wipers.
iWhen you now press the KEYLESS-GO
start/stop button
Ronce more, the ignition (position 2) is
switched on
Rtwice more the power supply is again
switched off
Ignition (or position 2)
XPress the KEYLESS-GO start/stop button
twice.
This supplies power for all electrical
consumers.
When you switch on the ignition, all lamps
in the instrument cluster come on. The
high-beam headlamp indicator lamp and
turn signal indicator lamps will only come
on if activated. If a lamp in the instrument
cluster fails to come on when the ignition
is switched on, have it checked and
replaced if necessary. If a lamp in the
instrument cluster remains on after
starting the engine or comes on while
driving, refer to “Lamps in instrument
cluster” (Y page 254).
iWhen you now press the KEYLESS-GO
start/stop button once, the power supply
is again switched off.
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Steering wheel adjustmentXAdjusting steering wheel in or out: Move
stalk in direction of arrows :.
XAdjusting steering wheel up or down:
Move stalk in direction of arrows ;.
iThe memory function (Y page 88) lets
you store the settings for the steering
wheel together with the settings for the
seat position and the exterior rear view
mirrors.
Easy-entry/exit feature
This feature allows the driver an easier entry
into and exit from the vehicle. When entering
and exiting the vehicle, the steering wheel is
in its uppermost position.
The easy-entry/exit feature can be activated
or deactivated in the Convenience submenu
of the control system (Y page 127).
GWarning!
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 do one of
the following:
RMove steering wheel adjustment stalk.
RPress one of the memory position buttons.
RPress memory button M.
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.
With the easy-entry/exit feature activated,
the steering wheel will return to its last set
position when you close the driver’s door with
the ignition switched on. The steering wheel
will also return to its last set position when
you insert the SmartKey into the starter
switch or press the KEYLESS-GO start/stop
button once with the driver’s door closed.
iThe last set steering wheel position is
stored when the ignition is switched off or
the position is stored in memory
(Y page 89).
With the easy-entry/exit feature activated,
the steering wheel tilts upwards when you
remove the SmartKey from the starter switch.
The steering wheel also tilts upwards when
you open the driver’s door with the SmartKey
in starter switch position 0 or 1 or the
KEYLESS-GO start/stop button in position 1.
iWhen the current position for the steering
wheel is in the uppermost tilt position, the
steering wheel will no longer be able to
move upward when the easy-entry/exit
feature is activated.
The adjustment procedure is briefly
interrupted when the engine is started.
GWarning!
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.
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