
Switching off (ATA) .......................... 76
Switching the function on/off
(ATA) ................................................ 76
Alarm system
see ATA (Anti-Theft Alarm system)
Anti-lock braking system
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Armrest
Stowage compartment .................. 283
Ashtray ............................................... 294
Assistance display (on-board com-
puter) .................................................. 221
Assistance menu (on-board com-
puter) .................................................. 221
ASSYST PLUS
Displaying a service message ........ 318
Hiding a service message .............. 318
Resetting the service interval dis-
play ................................................ 318
Service message ............................ 318
Special service requirements ......... 318
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 76
Function ........................................... 76
Switching off the alarm .................... 76
ATTENTION ASSIST
Activating/deactivating ................. 223
Display message ............................ 245
Function/notes ............................. 198
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshop
see Qualified specialist workshop
AUTO lights
Display message ............................ 241
see Lights
Automatic car wash (care) ............... 319
Automatic engine start (ECO start/
stop function) .................................... 149
Automatic engine switch-off (ECO
start/stop function) .......................... 149
Automatic headlamp mode .............. 124
Automatic transmission
Accelerator pedal position ............. 155
Automatic drive program ............... 156 Changing gear ............................... 155
DIRECT SELECT lever ..................... 152
Display message ............................ 254
Drive program display .................... 154
Driving tips .................................... 155
Emergency running mode .............. 159
Engaging drive positi
on .................. 153
Eng
aging neutral ............................ 153
Engaging park position automati-
cally ............................................... 152
Engaging reverse gear ................... 153
Engaging the park position ............ 152
Kickdown ....................................... 155
Manual drive program .................... 157
Manual drive program (Mercedes-
AMG vehicles) ................................ 158
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 226
Overview ........................................ 152
Problem (malfunction) ................... 159
Program selector button ................ 155
Pulling away ................................... 148
Starting the engine ........................ 147
Steering wheel paddle shifters ...... 156
Transmission position display ........ 154
Transmission positions .................. 154
Automatic transmission emer-
gency mode ....................................... 159
AUX (audio)
Notes/socket ................................ 279
B
Back button ....................................... 270
Backup lamp
Display message ............................ 241
Bag hook ............................................ 287
BAS (Brake Assist System) ................. 66
BAS PLUS (Brake Assist System
PLUS) with Cross-Traffic Assist
Function/notes ................................ 67
BAS PLUS with Cross-Traffic Assist
(Brake Assist PLUS with Cross-
Traffic Assist)
Important safety notes .................... 67
Battery (SmartKey)
Checking .......................................... 80
Important safety notes .................... 80
Index5 

Setting the date/time formatsee also Digital Operator's Man-
ual .................................................. 269
Setting the language
see also Digital Operator's Man-
ual .................................................. 269
Setting the time
see also Digital Operator's Man-
ual .................................................. 269
Settings
Factory (on-board computer) ......... 226
On-board computer ....................... 221
SETUP (on-board computer) .............226
Side impact air bag .............................5 0
Side marker lamp (display mes-
sage) ................................................... 241
Side windows
Cleaning ......................................... 322
Convenience closing feature ............ 92
Convenience opening feature ..........9 2
Important safety information ........... 90
Opening/closing .............................. 91
Problem (malfunction) .....................9 3
Resettin g........................................ .93
Reversin gfeature ............................ .91
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 269
Skibag ................................................ 285
Sliding sunroof
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 80
Changing the programming .............7 9
Checking the battery ...................... .80
Convenience closing feature ............ 92
Convenience opening feature .......... 92
Dis play message ............ ...
............. 257
Door central locking/unlocking ...... .77
Important safety notes .................... 77
KEYLESS-GO start function .............. 79
Loss .................................................8 1
Mechanical key ................................ 79
Overview .......................................... 77
Positions (ignition lock) ................. 145
Problem (malfunction) ..................... 81
Starting the engine ........................ 147 Smartphone
Starting the engine ........................ 147
SMS
see also Digital Operator's Man-
ual .................................................. 269
Snow chains ...................................... 345
Sockets
Center console .............................. 296
General notes ................................ 296
Rear compartment .........................2 96
Trunk ............................................. 297
Sound
Switching on/off ........................... 270
Special seat belt retractor .................. 59
Specialist workshop ............................ 30
Speed, controlling
see Cruise control
Speedometer
Activating/deactivating the addi-
tional speedometer ........................ 225
Digital ............................................ 215
In the Instrument cluster ................. 35
Segments ...................................... 210
Selecting the display unit ...............2 25
Standing lamps
Display message ............................ 241
Switching on/off ........................... 125
Start/Stop button
General notes ................................ 145
Key positions ................................. 146
Removing ....................................... 146
Starting the engine ........................ 147
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 146
STEER CONTROL .................................. 75
Ste
ering
Display message ............................ 257
Warning lamps ............................... 268
Steering Assist
see DISTRONIC PLUS
Steering Assist and Stop&Go Pilot
(DISTRONIC PLUS)
Display message ............................ 250
Steering assistant STEER CON-
TROL
see STEER CONTROL
Index19 

iThe immobilizer is always deactivated when
you start the engine.
In the event that the engine cannot be started
(yet the vehicle's battery is charged), the sys-
tem 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).
ATA (anti-theft alarm system)
XTo arm: lock the vehicle with the SmartKey or
KEYLESS-GO.
Indicator lamp :flashes. The alarm system
is armed after approximately ten seconds.
XTo disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or
XInsert the SmartKey into the ignition lock.
or
XPress the Start/Stop button.
The SmartKey must be in the vehicle.
A visual and audible alarm is triggered if the
alarm system is armed and you open:
Ra door
Rthe vehicle with the mechanical key
Rthe trunk lid
Rthe hood
XTo stop the alarm with the SmartKey:
press the %or& button on the Smart-
Key.
The alarm is stopped.
or
XRemove the Start/Stop button from the igni-
tion lock.
XInsert the SmartKey into the ignition lock.
The alarm is stopped.
XTo stop the alarm using KEYLESS-GO:
grasp the outside door handle. The SmartKey
must be outside the vehicle.
The alarm is stopped.
or
XPress the Start/Stop button on the dash-
board. The SmartKey must be inside the vehi- cle.
The alarm is stopped.
The alarm is not switched off, even if you close
the open door that triggered it, for example.
iIf the alarm continues for more than
30 seconds, the mbrace emergency call sys-
tem automatically notifies the Customer
Assistance Center. This is done either by text message or data connection.
The emergency call system sends a message
or establishes a data connection provided
that:
Ryou have subscribed to the mbrace service.
Rthe mbrace service has been activated
properly.
Rthe necessary mobile phone network is
available.
76Protection against theft
Safety 

signal can be activated and deactivated via the
multimedia system; see the Digital Operator's
Manual.
You will receive visual and acoustic locking con-
firmation if all components were able to be
locked.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the SmartKey;
see the Digital Operator's Manual.
XTo open the trunk lid automatically from
outside the vehicle:press and hold theF
button until the trunk lid opens.
XTo open the trunk lid automatically from
outside the vehicle: if the SmartKey is loca-
ted in the immediate vicinity of the vehicle,
press the Fbutton on the SmartKey.
When the trunk lid closes you can then
release the button.
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a Smart-
Key in the vehicle (
Ypage 147).
Locking/unlocking centrally
You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you only need carry the
SmartKey with you. You can combine the func-
tions of KEYLESS-GO with those of a conven-
tional SmartKey. Unlock the vehicle by using
KEYLESS-GO, for instance, and lock it using the
& button on the SmartKey.
The driver's door and the door at which the han-
dle is used, must both be closed. The SmartKey
must be outside the vehicle. When locking or
unlocking with KEYLESS-GO, the distance
between the SmartKey and the corresponding
door handle must not be greater than 3 ft (1 m).
A brief radio connection between the vehicle
and the SmartKey determines whether a valid
SmartKey is in, or in the direct vicinity of, the
vehicle. This occurs, for example:
Rwhen starting the engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
Rduring convenience closing
XTo unlock the vehicle: touch the inner sur-
face of the door handle.
XTo lock the vehicle: touch sensor surface :
or ;.
Make sure that you do not touch the inner
surface of the door handle.
XConvenience closing feature: touch
recessed sensor surface ;for an extended
period.
Further information on the convenience clos-
ing feature (
Ypage 92).
XTo unlock the trunk lid: pull the handle on
the trunk lid.
Deactivating and activating
If you do not intend to use a SmartKey for an
extended period of time, you can deactivate the
KEYLESS-GO function of the SmartKey. The
SmartKey will then use very little power, thereby
conserving battery power. For the purposes of
activation/deactivation, the vehicle must not be
nearby.
XTo deactivate: press the&button on the
SmartKey twice in rapid succession.
The battery check lamp (
Ypage 80) of the
SmartKey flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated.
XTo activate: press any button on the Smart-
Key.
or
XInsert the SmartKey into the ignition lock.
KEYLESS-GO and all of its associated features
are available again.
78SmartKey
Opening and closing 

KEYLESS-GOstart function
Gene ral notes
Bear in min dthat th eengin ecan be started by
any of th evehicl eoccupant sif there is aSmart -
Key in th evehicl e (
Ypage 147).
Changing the settings ofthe locking
system
You can chang eth esetting sof th elocking sys-
tem. This mean sthat only th edriver's door and
th efuel filler flap are unlocke dwhen th evehicl e
is unlocked. This is useful if you frequentl ytravel
on your own .
XTo change th esetting: press and hold down
th e% and& buttons simultaneousl y
for approximately six seconds until th ebat -
tery chec klamp (
Ypage 80 )flashes twice .
If th esetting of th elocking system is changed
within th esignal range of th evehicle, pressing
th e& or% button:
Rlocks or
Runlocks th evehicl e
The SmartKey no wfunction sas follows :
XTo unlock: press the% buttononce .
XTo unlock centrally: press the% button
twice .
XTo lock: press the& button.
The KEYLESS-GO function scan be changed as
follows :
XTo unlock th edriver's door :touch th einner
surfac eof th edoor handle on th edriver's
door .
XTo unlock centrally: touch theinner surfac e
of th edoor handle on th efront-passenger
door or th erear door .
XTo lock centrally: touch theouter sensor
surfac eon on eof th edoor handles .
XTo restoreth efactory settings: press and
hold th e% and& buttons simultane -
ousl yfor approximately six seconds until th e
battery chec klamp (
Ypage 80) flashes
twice .
Mechanical key
Gene ral notes
If th evehicl ecan no longer be locke dor
unlocke dwit hth eSmartKey or KEYLESS-GO ,
use th emechanical key.
If you use th emechanical ke yto unloc kand
open th edriver's door ,th eanti-thef talarm sys-
te m will be triggered .Switc hoff th ealarm
(
Ypage 76) .
If you unloc kth evehicl eusin gth emechanical
key, th efuel filler flap will no tbe unlocke dauto -
matically.
XTo unlock th efuel filler flap: insert the
SmartKey int oth eignition lock.
Removing the mechanical key
XPush release catch :in th edirection of th e
arrow and at th esam etime remove mechan -
ical ke y; from th eSmartKey.
Fo rfurther information about :
RLocking/unlocking thedriver's door
(Ypage 84 )
RUnlocking th etrunk (Ypage 90 )
Inserting the mechanical key
XPush mechanical ke y; completely int oth e
SmartKey until it engage sand release
catch :is bac kin it sbasic position .
SmartKey79
Opening and closing
Z 

SmartKey battery
Important safety notes
GWARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatalinjury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately.
HEnvironmental note
Batteries contain dangerous
substances. It is against the
law to dispose of them with
the household rubbish. They
must be collected separatelyand recycled to protect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to a qualified spe-
cialist workshop or a special
collection point for used bat-
teries.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm.
Mercedes-Benz recommends that you have the
batteries replaced at a qualified specialist work-
shop.
Checking the battery
XPress the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
XChange the battery (Ypage 80).
If the SmartKey battery is checked within the
signal reception range of the vehicle, pressing
the & or% button:
Rlocks or
Runlocks the vehicle
iYou can obtain a battery from any qualified
specialist workshop.
Replacing the battery
You require a CR 2025 3 V cell battery.
XTake the mechanical key out of the SmartKey
(Ypage 79).
XPress mechanical key ;into the SmartKey
opening in the direction of the arrow until bat-
tery compartment cover :opens. Do not
hold battery compartment cover :closed
while doing so.
XRemove battery compartment cover :.
80SmartKey
Opening and closing 

XRepeatedly tap theSmartKey against your
palm until battery =falls out .
XInsertth ene wbattery wit hth epositive ter-
minal facing upwards. Use alint-free cloth to
do so.
XMak esur ethat th esurfac eof th ebattery is
free of lint, grease and other contaminants.
XInser tth efron ttab sof battery compartmen t
cover :intoth ehousing first and then press
to close it .
XInsertmechanical ke y; intoth eSmartKey
(Ypage 79).
XChec kth efunction of all SmartKey buttons on
th evehicle.
Problems with the SmartKey
ProblemPossible causes/consequences and MSolutions
You can no longer lockor
unlock th evehicl eusin g
th eSmartKey.The SmartKey battery is discharged or nearly discharged.
XChec kth eSmartKey battery (Ypage 80) and replace it if necessar y
(Ypage 80).
If this does no twork:
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 84).
There is interferenc efrom apowerful source of radi owaves.
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 84).
The SmartKey is faulty.
XLockor unlock th evehicl eusin gth emechanical ke y (Ypage 84).
XHaveth eSmartKey checke dat aqualified specialist workshop.
You can no longer loc kor
unlock th evehicl eusin g
KEYLESS-GO .KEYLESS-GO was deactivated.
XReactivateKEYLESS-GO (Ypage 78).
The SmartKey battery is discharged or nearly discharged.
XCheckth eSmartKey battery (Ypage 80) and replace it if necessar y
(Ypage 80).
If this does no twork:
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 84).
There is interferenc efrom apowerful source of radi owaves.
XLoc kor unlock th evehicl eusin gth emechanical ke y (Ypage 84).
SmartKey81
Opening and closing
Z 

ProblemPossible causes/consequences andMSolutions
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of the
SmartKey.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
XLock or unlock the vehicle using the mechanical key (Ypage 84).
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
The engine cannot be
started using the Smart-
Key.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary (Ypage 334).
or
XJump-start the vehicle (Ypage 335).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 80) and replace it if necessary
(Ypage 80).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost a Smart-
Key.XHave the SmartKey deactivated at a qualified specialist workshop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
82SmartKey
Opening and closing