On long journeys, take regular breaks in good
time to allow yourself to rest. If you do not take a break, you will be warned again after
15 minutes at the earliest. This will only happen
if ATTENTION ASSIST still detects typical indi-
cators of fatigue or increasing lapses in concen- tration.
Vehicles with COMAND: if a warning is issued
in the multifunction display, a service station
search is performed in COMAND. You can select a service station and navigation to this service
station will then begin. This function can be acti-
vated and deactivated in COMAND. Traffic Sign Assist
General notes Traffic Sign Assist displays the maximum speed
permitted to the driver in the instrument cluster.
The data stored in the navigation system and
general traffic regulations are used to determine
the current speed limit.
As Traffic Sign Assist is a map-based system,
traffic signs put up temporarily (e.g. near road-
works) are not detected.
If a traffic sign that is relevant to your vehicle is passed, the display of the speed limits is upda-
ted.
Traffic signs with a restriction indicated by an
additional sign (e.g. in wet conditions) are also
shown.
The traffic signs are only displayed with the
restrictions if:
R The regulation must be observed with the
restriction, or
R Traffic Sign Assist is unable to determine
whether the restriction applies
If Traffic Sign Assist is unable to determine a
maximum permitted speed from any of the avail- able sources, no speed limit is displayed in the
instrument cluster either. Traffic Sign Assist is not available in all coun-
tries. In this case, symbol
0043is shown in the
assistance graphic display (Y page 237).
Important safety notes Traffic Sign Assist is only an aid and is not always
able to correctly display speed limits. Traffic
signs always have priority over the Traffic Sign
Assist display.
The system may be either functionally impaired
or temporarily unavailable if the information in
the digital street map of the navigation system is incorrect or out of date.
Instrument cluster display Displaying the assistance graphic
X Call up the assistance graphics display func-
tion using the on-board computer
(Y page 237).
X Select the Traffic Sign Assist display.
Detected traffic signs are displayed in the
instrument cluster.
Speed limit with unknown restriction 0043
Maximum permitted speed
0044 Maximum permitted speed for vehicles for
which the restriction in the additional sign is
relevant
0087 Additional sign for unknown restriction
A maximum permitted speed of 80 mph
(80 km/h) and a speed limit of 60 mph
(60 km/h) with an unknown restriction apply. Driving systems
205Driving and parking Z
There is a short delay before a change in outside
temperature appears in the multifunction dis-
play. Coolant temperature gauge
G
WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The engine
will otherwise be damaged.
All vehicles except PLUG-IN HYBRID: the
coolant temperature display is on the instru-
ment cluster on the right-hand side (Y page 37).
Under normal operating conditions and with the specified coolant level, the coolant temperature
may rise to 248 ‡ (120 †). Operating the on-board computer
Overview 0043
Multifunction display
0044 Right control panel
0087 Left control panel
X To activate the on-board computer: turn
the SmartKey to position 0047in 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 system: you can find further information on the Voice
Control System in the separate operating
instructions.
Vehicles with the Audio 20 multimedia system:
you can find further information on voice-oper-
ated control for navigation in the manufactur-
er's operating instructions. 230
Displays and operationOn-board computer and displays
Telephone menu
Introduction G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi- cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this 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.
X Switch on the mobile phone (see the manu-
facturer’s operating instructions).
X Switch on the multimedia system (see the
Digital Operator's Manual)
X Establish a Bluetooth ®
connection to the mul-
timedia system (see the Digital Operator's
Manual).
X Press the 0059or0065 button on the steering
wheel to select the Tel Telmenu.
You will see one of the following display mes-
sages in the multifunction display:
R Phone READY Phone READY or the name of the network
provider: the mobile phone has found a net-
work and is ready to receive.
R Phone No Service
Phone 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
Tel Tel
menu, a display message appears in the multi-
function display.
You can accept a call at any time regardless of
the menu selected.
X Press the 0061button on the steering wheel
to accept an incoming call. Rejecting or ending a call You can end or reject a call even if you are not in
the Tel Tel menu.
X Press the 0076button on the steering wheel
to reject or end a call.
Selecting an entry from the phone book X
Press the 0059or0065 button on the steering
wheel to select the Tel
Telmenu.
X Press the 0063,0064or0076 button to
switch to the phone book.
X Authorize access to the phone book on the
phone.
X Press the 0063or0064 button to select the
desired name.
or
X To start rapid scrolling: press and hold the
0063 or0064 button for longer than one sec-
ond.
Rapid scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored for
a name: press the 0061or0076 button to
start dialing.
or X If there is more than one number for a
particular name:
press the0061or0076
button to display the numbers.
X Press the 0063or0064 button to select the
number you want to dial.
X Press the 0061or0076 button to start dialing.
or
X To exit the telephone book: press the0076
or 0038 button.
Redialing The on-board computer saves the last names or
numbers dialed in the redial memory.
X Press the 0059or0065 button on the steering
wheel to select the Tel Telmenu.
X Press the 0061button to switch to the redial
memory.
X Press the 0063or0064 button to select the
desired name or number. 236
Menus and submenusOn-board computer and displays
Further information about Active Distance
Assist DISTRONIC with Active Steering Assist
(Y page 177).
Activating/deactivating Active Brake
Assist You can use these functions to activate/deac-
tivate Active Brake Assist or, on vehicles with
the Driving Assistance package, to activate or
deactivate Active Brake Assist with cross-traffic
function.
X Press the 0059or0065 button on the steering
wheel to select the DriveAssist
DriveAssist menu.
X Press the 0063or0064 button to select
Brake Assist
Brake Assist.
X Press 0076to confirm.
The current selection appears.
X To activate/deactivate: press the0076but-
ton again.
When Active Brake Assist or Active Brake
Assist with cross-traffic function is deactiva-
ted, the 00D4symbol appears in the multi-
function display in the assistance graphic dis-
play.
Further information on Active Brake Assist
(Y page 67 )and Active Brake Assist with cross-
traffic function (Y page 72).
Activating/deactivating ATTENTION
ASSIST X
Press the 0059or0065 button on the steering
wheel to select the DriveAssist
DriveAssist menu.
X Press the 0063or0064 button to select
Attention Assist Attention Assist .
X Press the 0076button.
The current selection appears.
X Press 0076to confirm.
X Press the 0064or0063 button to set Off
Off ,
Standard
Standard orSensitive
Sensitive .
X Press the 0076button to save the setting.
When ATTENTION ASSIST is deactivated, the
00D7 symbol appears in the multifunction dis-
play in the assistance graphics display.
For further information about ATTENTION
ASSIST, see (Y page 203). Activating/deactivating Blind Spot
Assist X
Press the 0059or0065 button on the steering
wheel to select the DriveAssist
DriveAssist menu.
X Press the 0063or0064 button to select
Blind Spot Assist Blind Spot Assist .
X Confirm by pressing 0076on the steering
wheel.
The current selection appears.
X To activate/deactivate: press the0076but-
ton again.
For further information about Blind Spot Assist, see (Y page 206).
For further information about Active Blind Spot
Assist, see (Y page 209).
Activating/deactivating Lane Keeping
Assist X
Press the 0059or0065 button on the steering
wheel to select the DriveAssist DriveAssistmenu.
X Press the 0063or0064 button to select
Lane Keeping Assist
Lane Keeping Assist .
X Press 0076to confirm.
The current selection appears.
X Press 0076to confirm.
X Press the 0064or0063 button to set Off
Off,
Standard
Standard orAdaptive
Adaptive.
When Lane Keeping Assist or Active Lane
Keeping Assist is activated, the multifunction display shows the lane markings as bright
lines in the assistance graphic.
X Press the 0076button to save the setting.
For further information about Lane Keeping
Assist, see (Y page 207).
For further information about Active Lane Keep- ing Assist, see (Y page 211). Service menu
Introduction Depending on the equipment installed in the
vehicle, you have the following options in the
Serv. Serv. menu: 238
Menus and submenusOn-board computer and displays
R
calling up display messages in message mem-
ory (Y page 244)
R restarting the tire pressure loss warning sys-
tem (Y page 358) or checking the tire pres-
sure electronically (Y page 360)
R calling up the service due date (Y page 325).Settings menu
Introduction Depending on the equipment installed in the
vehicle, In the Sett. Sett.menu you have the follow-
ing options:
R Changing the instrument cluster settings
(Y page 239)
R Changing the light settings (Y page 239)
R Changing the vehicle settings (Y page 240)
R Changing the convenience settings
(Y page 240)
R Restoring the factory settings (Y page 241)
Instrument cluster submenu Selecting the distance unit
The Display Unit Speedometer / Odome‐
Display Unit Speedometer / Odome‐
ter:
ter: function allows you to choose whether
certain displays appear in kilometers or miles in the multifunction display.
X Press the 0059or0065 button on the steering
wheel to select the Sett.
Sett. menu.
X Press the 0064or0063 button to select the
Instrument Cluster
Instrument Cluster submenu.
X Press 0076to confirm.
X Press the 0064or0063 button to select the
Display Unit Speedometer / Odometer
Display Unit Speedometer / Odometer
function.
You will see the selected setting: km
km ormiles miles.
X Press the 0076button to save the setting.
The selected unit of measurement for distance
applies to:
R Digital speedometer in the Trip
Trip menu
R Odometer and the trip odometer
R Trip computer
R Current consumption and the range
R Navigation instructions in the Navi
Navi menu
R Cruise control R
Active Distance Assist DISTRONIC
R ASSYST PLUS service interval display
Selecting permanent display The Permanent Display: Permanent Display: function allows you
to choose whether the multifunction display
always shows the outside temperature or the
speed.
The speed display is inverse to the speedome-
ter.
X Press the 0059or0065 button on the steering
wheel to select the Sett. Sett.menu.
X Press the 0064or0063 button to select the
Instrument Cluster
Instrument Cluster submenu.
X Confirm by pressing 0076on the steering
wheel.
X Press the 0064or0063 button to select the
Permanent Display:
Permanent Display: function.
The current setting, Outside Temperature
Outside Temperature,
Speedometer [km/h]
Speedometer [km/h] orSpeedometer
Speedometer
[mph]
[mph] appears.
X To change the setting: press0076again.
Light submenu Setting the daytime running lamps
This function is not available in Canada.
X Press the 0059or0065 button on the steering
wheel to select the Sett.
Sett.menu.
X Press the 0064or0063 button to select the
Light
Light submenu.
X Press 0076to confirm.
X Press 0064or0063 to select the Daytime
Daytime
Running Lights
Running Lights function.
If the Daytime
Daytime Running
RunningLights
Lightsfunction has
been switched on, the cone of light and the
0086 symbol in the multifunction display are
shown in orange.
X Press the 0076button to save the setting.
Further information on daytime running lamps
(Y page 110).
Switching the Intelligent Light System
on/off
X Press the 0059or0065 button on the steering
wheel to select the Sett. Sett.menu.
X Press the 0064or0063 button to select the
Light
Light submenu.
X Press 0076to confirm. Menus and submenus
239On-board computer and displays Z
Display messages
Possible causes/consequences and
0050
0050Solutions Radar
Radar
Sensors
Sensors Dirty
Dirty
See Operator's Man‐
See Operator's Man‐
ual ual The radar sensor system is malfunctioning.
Possible causes are:
R dirt on sensors
R heavy rain or snow
R when driving on inter-urban roads without traffic or infrastructure,
e.g. in desert-like areas
At least one driving system or driving safety system is malfunctioning
or is temporarily unavailable:
R PRE-SAFE ®
PLUS
R Active Brake Assist
R Active Lane Keeping Assist
R Active Blind Spot Assist
R Active Distance Assist DISTRONIC
If the radar sensor system in front is dirty, Active Blind Spot Assist will
not perform a course-correcting brake application.
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving and
drive safety systems will be available again. The display message dis-
appears.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 156).
X Switch off the engine.
X Clean all sensors (Y page 330).
X Restart the engine.
The display message disappears. 0075
SRS SRS
Malfunction Malfunction Ser‐
Ser‐
vice Required
vice Required The restraint system is malfunctioning.
The
0075 warning lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately.
For further information about the restraint system, see (Y page 44).0075
Front Left Malfunc‐ Front Left Malfunc‐
tion Service tion Service
Required Required
orFront
Front
Left Malfunction
Left Malfunction
Service Required Service Required The restraint system has malfunctioned at the front on the left or right.
The 0075 warning lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately. 252
Display
messagesOn-board computer and displays
Display messages
Possible causes/consequences and
0050
0050Solutions 0075
Rear Left Malfunc‐ Rear Left Malfunc‐
tion Service tion Service
Required Required
orRear
Rear
Right Malfunction
Right Malfunction
Service Required Service Required The rear left-hand or right-hand restraint system is malfunctioning.
The 0075 warning lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately. 0075
Rear Rear
Center
Center Malfunc‐
Malfunc‐
tion Service
tion Service
Required Required The rear center restraint system is malfunctioning. The
0075warning
lamp also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be triggered unintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately. 0075
Left Side Curtain Left Side Curtain
Airbag Malfunction Airbag Malfunction
Service Required Service Required
or
Right Side Curtain
Right Side Curtain
Airbag Malfunction Airbag Malfunction
Service Required Service Required The left-hand or right-hand window curtain air bag is malfunctioning.
The 0075 warning lamp also lights up in the instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered unin-
tentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop immediately. Display
messages
253On-board computer and displays Z
Display messages
Possible causes/consequences and
0050
0050Solutions Service
Service
Required
Required Do
Do
Not Shift Gears
Not Shift Gears
Visit Dealer Visit Dealer You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position
005Bis selected:
X Drive to a qualified specialist workshop without shifting the trans-
mission from position 005B.
If position 005E,005Cor005D is selected:
X Secure the vehicle against rolling away (Y page 156).
X Notify a qualified specialist workshop or breakdown service. Reversing Reversing
Not
NotPossi‐
Possi‐
ble
ble Service
Service Required
Required You can no longer shift to transmission position
005Edue to a malfunc-
tion.
Transmission positions 005D,005Cor005B continue to be available.
A warning tone also sounds.
X Visit a qualified specialist workshop. Transmission Mal‐ Transmission Mal‐
function Stop function Stop A malfunction has occurred in the mechanical transmission compo-
nents.
A warning tone also sounds. The transmission shifts automatically to position 005C.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Shift the transmission to position 005D.
X Secure the vehicle against rolling away (Y page 156).
X Notify a qualified specialist workshop or breakdown service. Auxiliary Battery Auxiliary Battery
Malfunction Malfunction The auxiliary battery for the automatic transmission is no longer being
charged.
X Visit a qualified specialist workshop.
X Until then, always set the automatic transmission to position 005D
before switching off the engine.
X Before leaving the vehicle, apply the electric parking brake. 0065 The tailgate is open
G WARNING
When the engine is running, exhaust gases can enter the vehicle inte- rior if the tailgate is open.
There is a risk of poisoning.
X Close the tailgate. Display
messages
271On-board computer and displays Z