Page 97 of 506

95 Safety and Security
Anti-theft systems
Disarming the alarm system
The alarm system is disarmed when you
unlock your vehicle with the SmartKey or
KEYLESS-GO*. The turn signal lamps flash
once to indicate that the alarm system is
deactivated.
Canceling the alarm
With the SmartKey
Insert the SmartKey in the starter
switch.
or
Press the Œ or ‹ button on the
SmartKey.
The alarm is canceled.
With KEYLESS-GO*
Grasp the outside door handle.
or
Press the KEYLESS-GO* start/stop
button.
The alarm is canceled.
Tow-away alarm
Once the tow-away alarm is armed, a visual
and audible alarm will be triggered when
someone attempts to raise the vehicle.Arming the 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.
iIf the turn signal lamps do not flash
three times, one of the following ele-
ments may not be properly closed:
a door
the trunk lid
Close the respective element and lock
the vehicle again.
iThe tow-away protection alarm is trig-
gered, for example, if the vehicle is lift-
ed on one side.
If the alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
Tele Aid system* (
page 271), provid-
ed that the Tele Aid service was sub-
scribed to and properly activated, and
that necessary cellular service and GPS
coverage are available.
Page 98 of 506
96 Safety and SecurityAnti-theft systemsDisarming the 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 button is located on the overhead con-
trol panel.
1Tow-away alarm off button
Switch off the ignition and remove the
SmartKey from the starter switch.
Press button1.
The indicator lamp in the button 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.Canceling tow-away alarm
To cancel the alarm:
With the SmartKey
Insert the SmartKey in the starter
switch.
or
Press the Œ or ‹ button on the
SmartKey.
With KEYLESS-GO*
Grasp the outside door handle.
or
Press the KEYLESS-GO start/stop but-
ton.
iYou cannot disarm the tow-away alarm
when the ignition is switched on.
Page 120 of 506

118 Controls in detailLocking and unlocking
Briefly press emergency release
button1.
The trunk unlocks and the trunk lid
opens.
Illumination of the emergency release but-
ton:
The button will flash for 30 minutes af-
ter opening the trunk.
The button will flash for 60 minutes af-
ter closing the trunk.
Automatic central locking
The doors and the trunk automatically lock
when the ignition is switched on and the
wheels are turning at vehicle speeds of ap-
proximately 9 mph (15 km / h) or more.
You can open a locked door from the in-
side. Open door only when conditions are
safe to do so.
iThe emergency release button unlocks
and opens the trunk while the vehicle is
standing still or in motion.iThe emergency release button does
not open the trunk lid, if the vehicle
battery is discharged or disconnected.
iIf the emergency release button is
pressed and the vehicle was centrally
locked from the outside using the
SmartKey, the exterior lamps will flash
and the alarm will sound as the trunk
lid opens.
To cancel the alarm, do one of the fol-
lowing:
Insert the SmartKey in the starter
switch.
Press button Œ or ‹ on the
SmartKey.
In vehicles with KEYLESS-GO*
Grasp the outside door handle.
The SmartKey with KEYLESS-GO
must be within 3 ft (1 m) of the ve-
hicle.
Press the KEYLESS-GO* start/stop
button (
page 35).
The SmartKey with KEYLESS-GO
must be inside the vehicle.
iThe doors unlock automatically after an
accident if the force of the impact ex-
ceeds a preset threshold.
The vehicle automatically locks when
the ignition is switched on and the
wheels are turning at vehicle speeds of
approximately 9 mph (15 km / h) or
more. You could therefore lock yourself
out when the vehicle
is pushed or towed
is on a test stand
Page 121 of 506

119 Controls in detail
Locking and unlocking
For more information on towing the vehi-
cle, see the “Practical hints” section
(page 439).
You can deactivate the automatic locking
mode using the control system
(page 166).
Locking and unlocking from the inside
You can lock or unlock the doors and the
trunk from inside using the central locking
switch. This can be useful, for example, if
you want to lock the vehicle before starting
to drive.
The fuel filler flap cannot be locked or un-
locked with the central locking switch.The switch is located in the center console.
Central locking switch1Locking
2Unlocking
Locking
Press upper half1 of the central lock-
ing switch.
If all doors are closed, the vehicle
locks.
Warning!
G
When leaving the vehicle, always remove the
SmartKey or the SmartKey with
KEYLESS-GO* from the starter switch, take
it with you, and lock the vehicle. Do not
leave children unattended in the vehicle, or
with access to an unlocked vehicle. Unsu-
pervised use of vehicle equipment may
cause an accident and/or serious personal
injury.
Page 180 of 506

178 Controls in detailAutomatic transmissionGear selector lever position
Effect
ì
Park position
Gear selector lever position
when the vehicle is parked. Place
gear selector lever in positionP
only when vehicle is stopped.
The park position is not intended
to serve as a brake when the
vehicle is parked. Rather, the
driver should always set the
parking brake in addition to
placing the gear selector lever in
positionP to secure the vehicle.
EffectThe SmartKey can only be
removed from the starter switch
with the gear selector lever in
positionP. With the SmartKey
removed, the gear selector lever
is locked in positionP.
If the vehicle’s electrical system
is malfunctioning, the gear
selector lever could remain
locked in positionP
(page 412).
í
Reverse gear
Place gear selector lever in
positionR only when vehicle is
stopped.
Effect
ë
Neutral
No power is transmitted from the
engine to the drive axle. When
the brakes are released, the
vehicle can be moved freely
(pushed or towed).
To avoid damage to the trans-
mission, never engageN while
driving.
If the ESP is deactivated or
malfunctioning:
Move gear selector lever toN
only if the vehicle is in danger of
skidding, e.g. on icy roads.
ê
Drive
The transmission shifts
automatically. All forward gears
are available.
Page 181 of 506

179 Controls in detail
Automatic transmission
Automatic shift programm
The program mode selector switch is
located on the lower part of the center
console.
1Program mode selector switch
C Comfort For comfort driving
S Sport For standard driving
The current gear selector lever position
and the selected program mode (
C/S) are
indicated in the multifunction display
(
page 174).
!Coasting the vehicle, or driving for any
other reason with gear selector lever
inN can result in transmission damage
that is not covered by the
Mercedes-Benz Limited Warranty.Warning!
G
Getting out of your vehicle with the gear
selector lever not fully engaged in positionP
is dangerous. Also, positionP alone is not
intended to or capable of preventing your
vehicle from moving, possibly hitting people
or objects.
Always set the parking brake in addition to
shifting to positionP (
page 55).
When parked on an incline, turn the front
wheels towards the road curb.
Do not park this vehicle in areas where com-
bustible materials such as grass, hay or
leaves can come into contact with the hot
exhaust system, as these materials could be
ignited and cause a vehicle fire.
Warning!
G
When leaving the vehicle, always remove the
SmartKey or the SmartKey with
KEYLESS-GO* from the starter switch, take
it with you, and lock the vehicle. Do not
leave children unattended in the vehicle, or
with access to an unlocked vehicle. Children
could move the gear selector lever from
positionP, which could result in an accident
and/or serious personal injury.
Page 245 of 506

243 Controls in detail
Driving systems
1Distance warning function on/off
switch
2Control lamp
3Thumbwheel for setting distance
Increasing distance
Increasing the distance setting tells
Distronic to maintain a greater following
distance to the vehicle ahead.
Turn thumbwheel3 towards¯.Decreasing distance
Decreasing the distance setting tells
Distronic to maintain a shorter following
distance to the vehicle ahead.
Turn thumbwheel3 towards®.
Distance warning function
When Distronic is deactivated, this func-
tion will continue to warn you when recog-
nizing a stationary obstacle or a slower
vehicle moving in the vehicle’s path and
the danger of a collision exists:
The distance warning lampl in the
instrument cluster comes on.
An intermittent warning sounds.
If these warnings are issued, you must
brake manually to maintain a safe distance
and avoid a collision with the vehicle
ahead.
When pressing the brake pedal, the warn-
ing sound stops. The warning sound also
stops when the distance to the vehicle ahead is sufficient again without applying
the brake pedal. In this case the distance
warning lamp also extinguishes.
Warning!
G
If the DTR warning lampl in the instru-
ment cluster comes on while driving and/or
an intermittent warning sounds, immediate
attention on the part of the driver is re-
quired. As required by the traffic situation,
apply the brakes and navigate around a pos-
sible obstacle. However, do not drive by re-
lying on the distance warning function, as
this will result in an emergency braking ap-
plication. Especially depending on road sur-
face conditions and driver reaction, this will
not always enable you to avoid a collision.iComplex driving situations are not al-
ways fully recognized by Distronic. This
could result in wrong or missing dis-
tance warnings.
Page 262 of 506
260 Controls in detailLoading
Fold the seat backrest forward.
Loading instructions
The total load weight including vehicle oc-
cupants and luggage/cargo should not ex-
ceed the load limit or vehicle capacity
weight indicated on the corresponding
placard located on the driver’s door B-pil-
lar.The handling characteristics of a fully load-
ed vehicle depend greatly on the load dis-
tribution. It is therefore recommended to
load the vehicle according to the illustra-
tions shown, with the heaviest items being
placed towards the front of the vehicle.
Always place items being carried against
front or rear seat backrests, and fasten
them as securely as possible.
The heaviest portion of the cargo should al-
ways be kept as low as possible since it in-
fluences the handling characteristics of
the vehicle.
!Leave the seat cushion hinge in this po-
sition. The upholstery could be dam-
aged if you fold the hinge back.