
Overhead control panel
FunctionPage
:uSwitches the rear inte-
rior lighting on/off113
;| Switches the automatic
interior lighting control
on/off
113
=p Switches the right-
hand reading lamp on/off113
?ï MB Info call button
(mbrace system)248
AG SOS button (mbrace
system)247
BRear-view mirror106
CButtons for the garage door
opener253
FunctionPage
DMicrophone for mbrace
(emergency call system),
telephone and Voice Control
System (see the separate
operating instructions)
EF Breakdown assistance
call button (mbrace system)248
Fp Switches the left-hand
reading lamp on/off113
Gc Switches the front inte-
rior lighting on/off113
38Overhead control panel
At a glance

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 the mes-
sage or data provided that:
Ryou have subscribed to the mbrace service.
Rthe mbrace service has been activated
properly.
Rthe necessary mobile phone network is
available.
72Protection against theft
Safety

SmartKey
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
If you attach heavy or large objects to the
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident.
Do not attach any heavy or large objects to the
SmartKey. Remove any bulky key rings before
inserting the SmartKey into the ignition lock.
!Keep the SmartKey away from strong mag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. a metal case.
This can affect the functionality of the Smart- Key.
SmartKey functions
:& To lock the vehicle
;FTo unlock the trunk lid
=%To unlock the vehicle
XTo unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
Rthe vehicle is locked again.
Ranti-theft protection is reactivated.
XTo lock centrally: press the&button.
The SmartKey centrally locks/unlocks:
Rthe doors
Rthe trunk lid
Rthe fuel filler flap
The turn signals flash once when unlocking and
three times when locking.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated using
the on-board computer (
Ypage 200).
When it is dark, the surround lighting also comes
on if it is activated in the on-board computer
(
Ypage 199).
KEYLESS-GO
General notes
Bear in mind that the engine can be started by
any of the vehicle occupants if there is a KEY-
LESS-GO key in the vehicle (
Ypage 130).
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-
SmartKey73
Opening and closing
Z

Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
SmartKey positions
SmartKey
gTo remove the SmartKey
(shift the transmission to position P)
1Power supply for some consumers, such as
the windshield wipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
iThe SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignition is not switched on.
The engine cannot be started.
KEYLESS-GO
General notes
Vehicles with KEYLESS-GO are equipped with
Smartkeys featuring the integrated KEYLESS-
GO function and a detachable Start/Stop but-
ton.
The Start/Stop button must be inserted in the
ignition lock and the Smartkey must be in the
vehicle.
When you insert the Start/Stop button into the
ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in
succession corresponds to the different key
positions in the ignition lock. This is only the
case if you are not depressing the brake pedal. If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
A check which periodically establishes a radio
connection between the vehicle and the Smart-
key determines whether a valid Smartkey is in
the vehicle. This occurs, for example, when
starting the engine.
To start the vehicle without actively using the
Smartkey:
Rthe Start/Stop button must be inserted in the
ignition lock.
Rthe Smartkey must be in the vehicle.
Rthe vehicle must not be locked with the
Smartkey or KEYLESS-GO (Ypage 73).
Do not keep the KEYLESS-GO key:
Rwith electronic devices, e.g. a mobile phone
or another Smartkey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. a metal case.
This can affect the functionality of KEYLESS-GO.
If you lock the vehicle with the Smartkey's
remote control or with KEYLESS-GO, after a
short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will not be able to start the engine with the
Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the button
on the front door (
Ypage 79), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This fun
ction
operates independently of the ECO start/stop
automatic engine switch-off function.
128Driving
Driving and parking

If you brake the vehicle with the parking brake,
the brake lamps will not light up.
XTo apply:depress parking brake ;firmly.
When the engine is running, the $(USA
only) or J(Canada only) indicator lamp
lights up in the instrument cluster.
XTo release: depress the brake pedal and keep
it depressed.
XPull release handle :.
When the ignition is switched on or the engine
is running, the $(USA only) or J(Can-
ada only) indicator lamp goes out in the instru-
ment cluster.
Parking the vehicle for a long period
If you leave the vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharging.
If you leave the vehicle parked for longer than six
weeks, the vehicle may suffer damage as a
result of lack of use.
XVisit a qualified specialist workshop and seek
advice.
iYou can obtain information about trickle
chargers from a qualified specialist work-
shop.
Driving tips
General notes
Important safety notes
GWARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If you operate mobile communication equip-
ment while driving, you will be distracted from traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate this equipment when the vehicle
is stationary.
Observe the legal requirements for the country
in which you are driving. Some jurisdictions pro-
hibit the driver from using a mobile phone while
driving a vehicle.
If you make a call while driving, always use
hands-free mode. Only operate the telephone
when the traffic situation permits. If you are
unsure, pull over to a safe location and stop
before operating the telephone.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers a
distance of 44 ft (approximately 14 m)per sec-
ond.
Drive sensibly – save fuel
Observe the following tips to save fuel:
XThe tires should always be inflated to the rec-
ommended tire pressure.
XRemove unnecessary loads.
XRemove roof racks when they are not needed.
XWarm up the engine at low engine speeds.
XAvoid frequent acceleration or braking.
XHave all maintenance work carried out as
indicated by the service intervals in the Main-
tenance Booklet or by the service interval dis-
play.
Fuel consumption also increases when driving in cold weather, in stop-start traffic and in hilly ter-
rain.
146Driving tips
Driving and parking

Under normal operating conditions and with the
specified coolant level, the coolant temperature
may rise to 248 ‡ (120 †).
Operating the on-board computer
Overview
:Multifunction display
;Switches on voice-operated navigation or
the Voice Control System
=Right control panel
?Left control panel
ABack button
XTo activate the on-board computer: turn
the SmartKey to position 1in the ignition lock.
You can control the multifunction display and the settings in the on-board computer using
the buttons on the multifunction steering
wheel.
Vehicles with the COMAND multimedia sys-
tem: you can find further information on the
Voice Control System in the separate operat-
ing instructions.
Vehicles with the Audio 20 multimedia sys-
tem: you can find further information on
voice-operated navigation in the manufactur-
er's operating instructions.
Left control panel
=
;RCalls up the menu and menu bar
9
:Press briefly:
RScrolls in lists
RSelects a submenu or function
RIn the Audiomenu: selects the
previous or next station, when the
preset list or station list is active,
or an audio track or video scene
RIn the Tel(telephone) menu:
switches to the phone book and
selects a name or telephone num-
ber
9
:Press and hold:
RIn the Audiomenu: selects a pre-
set list or a station list in the
desired frequency range, or an
audio track or video scene using
rapid scrolling
RIn the Tel(Telephone) menu:
starts rapid scrolling if the phone
book is open
aRConfirms the selection or display
message
RIn the Tel(Telephone) menu:
switches to the phone book and
starts dialing the selected number
Right control panel
~RRejects or ends a call
RExits the telephone book/redial
memory
6RMakes or accepts a call
RSwitches to the redial memory
W
XRAdjusts the volume
8RMute
190Displays and operation
On-board computer and displays

Back button
%Press briefly:
RBack
RSwitches off voice-operated navi-
gation or the Voice Control System
RHides display messages or calls up
the lastTripmenu function used
RExits the telephone book/redial
memory
%Press and hold:
RCalls up the standard display in the
Tripmenu
Multifunction display
:Text field
;Menu bar
=Drive program
?Transmission position
APermanent display: outside temperature or
speed
XTo display menu bar ;:press the =
or ; button on the steering wheel.
If you do not press the buttons any longer,
menu bar ;is faded out after a few seconds.
Text field :shows the selected menu or sub-
menu as well as display messages.
Possible displays in the multifunction dis-
play:
RZ Gearshift recommendation, when shifting
manually (Ypage 138)
Rj Active Parking Assist (Ypage 166)
RCRUISECruise control (Ypage 151)
R_ Adaptive Highbeam Assist
(Ypage 112)
R¤ ECO start/stop function (Ypage 131)
RëHOLD function (Ypage 162)
Menus and submenus
Menu overview
Press the =or; button on the steering
wheel to call up the menu bar and select a menu.
Operating the on-board computer (
Ypage 190).
Depending on the equipment installed in the
vehicle, you can call up the following menus:
RTripmenu (Ypage 191)
RNavimenu (navigation instructions)
(Ypage 193)
RAudiomenu (Ypage 194)
RTelmenu (telephone) (Ypage 195)
RDriveAssistmenu (assistance)
(Ypage 196)
RServ.menu (Ypage 198)
RSett.menu (settings) (Ypage 198)
The displays are controlled by the multimedia
system. For this reason, the displays for the
Audio
, Naviand Telmenus may differ slightly
to those in your vehicle.
Trip menu
Standard display
XPress and hold the %button on the steer-
ing wheel until the Tripmenu with trip odom-
eter :and odometer ;appears.
Menus and submenus191
On-board computer and displays
Z

Only for vehicles with COMAND: you can use the
Audiomenu to operate video DVDs.
XSwitch on the multimedia system and select
video DVD (see the separate operating
instructions).
XPress the=or; button on the steering
wheel to select the Audiomenu.
XTo select the next or previous scene:
briefly press the9or: button.
XTo select a scene from the scene list
(rapid scrolling): press and hold the 9
or : button until desired scene :
appears.
Telephone menu
Introduction
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
When telephoning, you must observe the legal
requirements for the country in which you are
currently driving.
XSwitch on the mobile phone (see the manu-
facturer’s operating instructions).
XSwitch on the multimedia system (see sepa-
rate operating instructions).
XEstablish a Bluetooth®connection to the mul-
timedia system (see the separate operating
instructions).
XPress the =or; button on the steering
wheel to select the Telmenu. You will see one of the following display mes-
sages in the multifunction display:
RPhone READYor the name of the network
provider: the mobile phone has found a net-
work and is ready to receive.
RPhone No Service: there is no network
available or the mobile phone is searching for
a network.
Accepting a call
If someone calls you when you are in the Telmenu, a display message appears in the multi-
function display.
You can accept a call at any time regardless of
the menu selected.
XPress the6button on the steering wheel
to accept an incoming call.
Rejecting or ending a call
XPress the ~button on the steering wheel
to reject or end a call.
Selecting an entry in the phone book
XPress the =or; button on the steering
wheel to select the Telmenu.
XPress the9,:ora button to
switch to the phone book.
XAuthorize access to the phone book on the
phone.
XPress the 9or: button to select the
desired name.
or
XTo start rapid scrolling: press and hold:
or 9 for longer than one second.
The names in the phone book are displayed
quickly one after the other.
Rapid scrolling stops when you release the
button or reach the end of the list.
XIf only one telephone number is stored for
a name: press the 6ora button to
start dialing.
or
XIf there is more than one number for a
particular name: press the6ora
button to display the numbers.
XPress the 9or: button to select the
number you want to dial.
XPress the 6ora button to start dialing.
Menus and submenus195
On-board computer and displays
Z