Page 85 of 464
85 Safety and Security
Anti-theft systems
Arming tow-away alarm
When you lock your vehicle, the tow-away
alarm is automatically armed after about
30 seconds.
When you unlock your vehicle, the
tow-away protection disarms
automatically.Disarming tow-away alarm
To prevent triggering the tow-away alarm
feature, switch off the tow-away alarm be-
fore towing the vehicle, or when parking on
a surface subject to movement, such as a
ferry or auto train.
The switch is located on the center con-
sole.
1Tow-away alarm off switch
2Indicator lamp
Turn off the ignition and remove the
SmartKey.
Press upper half1 of the switch.
Indicator lamp2 in the switch comes
on briefly.
Exit and lock your vehicle with the
SmartKey or (vehicles with
KEYLESS-GO*) the lock button at each
door handle.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.iYou cannot disarm the tow-away alarm
while the ignition is turned on.
Page 87 of 464
87 Controls in detail
Locking and unlocking
Seats
Memory function
Lighting
Instrument cluster
Control system
Automatic transmission
Good visibility
Automatic climate control
Audio system
Power windows
Soft top
Driving systems
Loading
Useful features
Page 88 of 464
88 Controls in detailLocking and unlocking
In the “Controls in detail” section you will
find detailed information on how to oper-
ate the equipment installed on your vehi-
cle. If you are already familiar with the
basic functions of your vehicle, this section
will be of particular interest to you.
To quickly familiarize yourself with the ba-
sic functions of the vehicle, refer to the
“Getting started” section of this manual.
The corresponding page numbers are giv-
en at the beginning of each segment.
Locking and unlocking
SmartKeys
Your vehicle comes supplied with two
SmartKeys, each with remote control and
a removable mechanical key. The locking
tabs for the mechanical key portion of the
two SmartKeys are a different color to help
distinguish each SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is
advisable to only unlock the vehicle when
you are in close proximity to it.
The SmartKey centrally locks and unlocks:
the doors
the glove box
the trunk lid
the fuel filler flap
SmartKey with remote controls1‹ Lock button
2Š Opening button for trunk lid
3Mechanical key locking tab
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 75)
!To prevent possible malfunction, avoid
exposing the SmartKey to high levels of
electromagnetic radiation.
iYou can also open and close the soft
top (
page 222) and the power win-
dows (page 213) using the
SmartKey.
Page 89 of 464
89 Controls in detail
Locking and unlocking
Factory setting
Global unlocking
Press buttonŒ.
All turn signal lamps flash once. The
locking knobs in the doors move up.
The vehicle will lock again automatically
within approximately 40 seconds of un-
locking if neither door nor trunk is opened,
the SmartKey is not inserted in the starter
switch, or the central locking switch is not
activated.
Global locking
Press button‹.
All turn signal lamps flash three times.
The locking knobs in the doors move
down.Selective setting
If you frequently travel alone, you may wish
to reprogram the SmartKey so that
pressingŒ only unlocks the driver’s
door and the fuel filler flap.
Press and hold buttonsŒ and‹
simultaneously for about five seconds
until battery check lamp5 flashes
twice.
The SmartKey will then function as fol-
lows:
Unlocking driver’s door and fuel filler
flap
Press buttonΠonce.
Global unlocking
Press buttonΠtwice.
Global locking
Press button‹.Restoring to factory setting
Press and hold buttonsŒ and‹
simultaneously for about six seconds
until battery check lamp5 flashes
twice.Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO* with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. It is possible for children
to open a locked door from the inside, which
could result in an accident and/or serious
personal injury.
Page 90 of 464
90 Controls in detailLocking and unlocking
Checking the batteries
Press button‹ orŒ.
Battery check lamp5 comes on brief-
ly to indicate that the SmartKey batter-
ies are in order.Unlocking and opening the trunk lid
You can unlock and open the trunk lid sep-
arately.
A minimum height clearance of 5.41 ft
(1.65 m) is required to open the trunk lid.
Press and hold button Š until the
trunk lid unlocks and begins to open.
!If you can no longer lock or unlock the
vehicle with the SmartKey, then the
batteries in the SmartKey are dis-
charged, the SmartKey is malfunction-
ing or the vehicle battery is drained.
Check the batteries in the
SmartKey and replace them if nec-
essary (
page 350).
Use the mechanical key to unlock
the doors (
page 348) and the
trunk (
page 349).
Have the vehicle battery and the
battery connections checked.
Use the mechanical key to lock the
doors and the trunk (
page 349).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz Cen-
ter.
!If battery check lamp5 does not
come on briefly during check, then the
SmartKey batteries are discharged.
Replace the batteries (
page 350).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.
iIf the batteries are checked within sig-
nal range of the vehicle, pressing
the‹ orŒ button will lock or
unlock the vehicle accordingly.
!The trunk lid swings open upwards au-
tomatically. Always make sure there is
sufficient overhead clearance.
Vehicles with trunk lid opening/closing
system*: To stop the opening proce-
dure, press buttonŠ. The Trunk lid
stops moving.
Page 91 of 464
91 Controls in detail
Locking and unlocking
The trunk lid can also be opened from its
inside in an emergency, see “Trunk lid
emergency release” (
page 105).Loss of SmartKey or mechanical key
If you lose a SmartKey or mechanical key,
you should do the following:
Have the SmartKey deactivated by an
authorized Mercedes-Benz Center.
Report the loss of the SmartKey or the
mechanical key immediately to your
car insurance company.
If necessary, have the mechanical lock
replaced.
Your authorized Mercedes-Benz Center
will be glad to supply you with a replace-
ment.
SmartKey with KEYLESS-GO*
Specially equipped vehicles come with two
SmartKeys with KEYLESS-GO, each with
remote control and a removable mechani-
cal key. The locking tabs for the mechani-
cal key portion of the two SmartKeys are a
different color to help distinguish each
SmartKey unit.
The KEYLESS-GO function is integrated
into the SmartKey. On these vehicles, the
validity of the SmartKey with KEYLESS-GO
is checked every time you pull a door
handle.
iIf the trunk lid does not open, it is still
locked separately (if applicable)
(page 106)
If the vehicle was previously centrally
locked, the trunk lid will lock automati-
cally when closed (
page 100). The
turn signals will flash three times to
confirm locking.
!To prevent possible malfunction, avoid
exposing the SmartKey with
KEYLESS-GO to high levels of electro-
magnetic radiation.
Page 92 of 464
92 Controls in detailLocking and unlockingIf the SmartKey with KEYLESS-GO* is valid,
your vehicle unlocks
the doors
the glove box
the trunk lid
the fuel filler flap
SmartKey with KEYLESS-GO1‹ Lock button
2Š Opening button for trunk lid
3Mechanical key locking tab
4ΠUnlock button
5Battery check lamp
6Â Panic button (
page 75)For more information on using the
SmartKey buttons, see “SmartKeys”
(
page 88)
Important notes on using KEYLESS-GO*
You can also use the SmartKey with
KEYLESS-GO like a normal SmartKey
(page 88).
You can combine KEYLESS-GO func-
tions with normal SmartKey functions
(e.g. unlocking with KEYLESS-GO and
locking with the remote control).
Always carry the SmartKey with
KEYLESS-GO with you.
Never store the SmartKey with
KEYLESS-GO together with:
electronic items such as a cellular
phone or another SmartKey with
KEYLESS-GO
metallic objects such as coins or
metal foil
Warning!
G
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
SmartKey with KEYLESS-GO with you and
lock the vehicle. Do not leave children unat-
tended in the vehicle, or with access to an
unlocked vehicle. Unsupervised use of vehi-
cle equipment may cause an accident
and/or serious personal injury.iYou can also open and close the soft
top (
page 222) and the power win-
dows (page 213) using the
SmartKey.
iIf the vehicle has been parked for a
longer period of time, you must pull the
door handle in order to activate the
KEYLESS-GO function.
Page 93 of 464
93 Controls in detail
Locking and unlocking
Doing so could impair the function of
the KEYLESS-GO system.
To lock or unlock the vehicle, the
SmartKey with KEYLESS-Go must be lo-
cated outside the vehicle within ap-
proximately 3 ft (1 m) of a door or the
trunk.
In order to start the engine with the
SmartKey with KEYLESS-GO:
the SmartKey with KEYLESS-GO
must be located in the vehicle
all the doors must be closed
the brake pedal must be depressed
If you have started the engine with the
KEYLESS-GO start/stop button, you
can only turn it off again with this but-
ton, even if you have put the SmartKey
in the starter switch in the meantime.
This does not apply if, after starting, the
gear selector lever is still in positionP.
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 accord-
ing to the position of the SmartKey in
the starter switch, even stopping the
engine.
If the SmartKey with KEYLESS-GO is
positioned farther away from the vehi-
cle the system may no longer recognize
the SmartKey with KEYLESS-GO. The
vehicle cannot be locked or the engine
started via the KEYLESS-GO system.
If the SmartKey with KEYLESS-GO is re-
moved from the vehicle while the igni-
tion is switched on (e.g. if passenger
exits the vehicle with the SmartKey
with KEYLESS-GO), the message
Key
not recognized!
will appear in the
multifunction display.
Find the SmartKey with KEYLESS-GO or
change its present location immediate-
ly (e.g. place it on the front passenger
seat or insert it in shirt pocket).
Remember that the engine can be
started by anyone with a SmartKey
with KEYLESS-GO that is left inside the
vehicle. If you leave the SmartKey with
KEYLESS-GO behind when exiting and
locking the vehicle, the message
Key
recognized in vehicle!
will appear in
the multifunction display.
