Page 78 of 464
78 Safety and SecurityPanic alarmAn audible alarm and flashing exterior 
lamps will operate for approximately 
21/2minutes.
1Âbutton
Activating
Press and hold button1for at least 
one second.
Deactivating
Press button1again.
or
Insert the SmartKey in the starter 
switch.
iWithout the antenna on the left rear 
side of the vehicle installed, the 
SmartKey signaling range for the panic 
alarm is considerably reduced. The 
panic alarm then only functions if the 
SmartKey is held in close proximity 
towards the antenna base. 
     
        
        Page 83 of 464

83 Safety and Security
Driving safety systems
For more information, see “Practical Hints” 
(page 345).Switching off the ESP
To improve the vehicle’s traction, turn off 
the ESP in driving situations where it would 
be advantageous to have the drive wheels 
spin and thus cut into surfaces for better 
grip such as:
starting out on slippery surfaces and in 
deep snow in conjunction with snow 
chains
in sand or gravel
Warning!
G
The ESP cannot prevent the natural laws of 
physics from acting on the vehicle, nor can 
it increase the traction afforded. The ESP 
cannot prevent accidents, including those 
resulting from excessive speed in turns, or 
hydroplaning. Only a safe, attentive, and 
skillful driver can prevent accidents. The ca-
pabilities of an ESP equipped vehicle must 
never be exploited in a reckless or danger-
ous manner which could jeopardize the us-
er’s safety or the safety of others.iThe ESP will only function properly if 
you use wheels of the recommended 
tire size (
page 413).
!Because of the ESP’s automatic opera-
tion, the engine must be turned off 
(SmartKey in starter switch position0 
or1) when
the parking brake is being tested on 
a brake test dynamometer
the vehicle is being towed with the 
front axle raised
Active braking action through the ESP 
may otherwise seriously damage the 
brake system.
Warning!
G
The ESP should not be switched off during 
normal driving other than in the circum-
stances described below. Disabling of the 
system will reduce vehicle stability in stan-
dard driving maneuvers.!Turn on the ESP immediately if the 
aforementioned circumstances do not 
apply anymore. 
     
        
        Page 86 of 464

86 Safety and SecurityAnti-theft systemsArming the alarm system
Lock the vehicle with the SmartKey. 
The turn signal lamps flash three times 
to indicate that the alarm system is ac-
tivated.
After approximately 15 seconds the in-
dicator lamp in the central locking 
switch starts flashing (
page 98).Disarming the alarm system
Unlock your vehicle with the SmartKey.
The turn signal lamps flash once to in-
dicate that the alarm system is deacti-
vated.
Canceling the alarm
To cancel the alarm:
Press theŒ or‹button on the 
SmartKey.
or
Insert the SmartKey in the starter 
switch.
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.
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
the fuel filler flap
the glove box
the storage compartment under the 
armrest
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 257), provided 
Tele Aid service was subscribed to and 
properly activated, and that necessary 
cellular service and GPS coverage are 
available (
page 257). 
     
        
        Page 87 of 464

87 Safety and Security
Anti-theft systems
Arming tow-away alarm
Lock your vehicle with the SmartKey.
The tow-away alarm is automatically 
armed after about 30 seconds.
Disarming tow-away alarm
To prevent triggering the tow-away alarm, 
switch off the tow-away alarm feature 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 lower part of 
the center console.
1Indicator lamp
2Tow-away alarm deactivation switch
Switch off the ignition (
page 35).
Remove the SmartKey from the starter 
switch.
Press tow-away alarm deactivation 
switch2.
Indicator lamp1 in the tow-away 
alarm deactivation switch comes on 
briefly.
Exit your vehicle.
Lock your vehicle with the SmartKey.
The tow-away alarm remains disarmed un-
til you lock your vehicle again.
Canceling tow-away alarm
To cancel the alarm:
Press theŒ or‹button on the 
SmartKey.
or
Insert the SmartKey in the starter 
switch.
iWhen you unlock your vehicle, the 
tow-away protection disarms 
automatically. The tow-away alarm 
remains disarmed until you lock the 
vehicle again.
iYou cannot disarm the tow-away alarm 
while the ignition is switched on. 
     
        
        Page 90 of 464

90 Controls in detailIn the “Controls in detail” section you will 
find detailed information on how to oper-
ate the equipment installed in your vehicle. 
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.
For more information on unlocking and 
locking, see (
page 34) and (
page 56).
Locking and unlocking
SmartKey
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 differ-
ent color to help distinguish each Smart-
Key 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 trunk lid
the fuel filler flap
the glove box
the storage compartment under the 
armrest
SmartKey with remote control1
‹
Lock button
2
Š
Unlock button for the trunk lid
3Mechanical key locking tab
4ŒUnlock button
5Battery check lamp
6ÂPanic button (
page 78)
iWithout the antenna on the left rear 
side of the vehicle installed, the 
SmartKey signaling range is consider-
ably reduced. Hold the SmartKey in 
close proximity towards the antenna 
base when locking or unlocking the 
vehicle.  
     
        
        Page 97 of 464

97 Controls in detail
Locking and unlocking
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 
approximately 9 mph (15 km/h).
You can open a locked door from the in-
side. Open door only when conditions are 
safe to do so.
You can deactivate the automatic locking 
using the control system, see “Setting 
automatic locking” (
page 141).
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 will not be locked or un-
locked with the central locking or unlock-
ing switch, respectively.
iIf the vehicle has previously been cen-
trally locked from the outside with the 
SmartKey, opening the trunk from the 
inside will trigger the anti-theft alarm 
system.
To cancel the alarm, do one of the fol-
lowing:
Press buttonŒor‹ on the 
SmartKey.
Insert the SmartKey in the starter 
switch.
iThe doors unlock automatically after an 
accident if the force of the impact ex-
ceeds a preset threshold.
To prevent the vehicle door locks from 
locking, deactivate the automatic cen-
tral locking when the vehicle
is pushed or towed
is on a test stand
Warning!
G
When leaving the vehicle, always remove the 
SmartKey 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. Unsuper-
vised use of vehicle equipment may cause 
an accident and/or serious personal injury. 
     
        
        Page 150 of 464

150 Controls in detailManual transmissionManual transmission is standard equip-
ment on select models and not available 
on all models.
For information on driving with a manual 
transmission, see “Manual transmission” 
(page 48).
Warning!
G
For vehicles equipped with a manual trans-
mission, getting out of your vehicle with the 
gearshift lever not engaged in first or re-
verse gear and parking brake engaged is 
dangerous.
Also, when parked on an incline, an engaged 
first or reverse gear alone may not prevent 
your vehicle from moving, possibly hitting 
people or objects.
Always set the parking brake in addition to 
engaging first or reverse gear (
page 56).
When parked on an incline, turn 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 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 gearshift lever, which could 
result in an accident and/or serious injury.Warning!
G
On slippery road surfaces, never downshift 
in order to obtain braking action.
This could result in drive wheel slip and re-
duced vehicle control. Your vehicle’s ABS 
will not prevent this type of loss of control. 
     
        
        Page 156 of 464

156 Controls in detailAutomatic transmission*Gear 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 376).
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.