When ATTENTION ASSIST is deactivated, the
ésymbol appears in the multifunction
display in the assistance graphic display.
When ATTENTION ASSIST has been deactiva-
ted, it is automatically reactivated after the
engine has been stopped. The sensitivity
selected corresponds to the last selection
activated (standard/sensitive).
Warning in the multifunction display
If fatigue or increasing lapses in concentra-
tion are detected, a warning appears in the
multifunction display: Attention Assist:
Take a Break!
In addition to the message shown in the mul-
tifunction display, you will then hear a warn-
ing tone.
XIf necessary, take a break.
XConfirm the message by pressing the a
button on the steering wheel.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break and ATTENTION ASSIST
continues to detect increasing lapses in con-
centration, you will be warned again after
15 minutes at the earliest. This will only hap-
pen if ATTENTION ASSIST still detects typical
indicators of fatigue or increasing lapses in
concentration.
If a warning is output in the multifunction dis-
play, COMAND performs a service station
search. You can select a service station and
navigation to this service station will then
begin. This function can be activated and
deactivated in COMAND.
Traffic Sign Assist
General notes
Traffic Sign Assist displays the maximum
speed permitted to the driver in the instru-
ment cluster. The data and general traffic reg-
ulations stored in the navigation system 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
roadworks) are not detected.
If a traffic sign that is relevant to your vehicle
is passed, the display of the speed limits is
updated.
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:
Rthe regulation must be observed with the
restriction, or
RTraffic 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
available 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 :is shown in the
assistance graphic display (
Ypage 243).
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.
Driving systems217
Driving and parking
Z
Useful information............................230
Important safety notes .....................230
Displays and operation .....................230
Menus and submenus ......................235
Display messages ............................. 251
Warning and indicator lamps in the
instrument cluster ............................285
229
On-board computer and displays
Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops (
Ypage 26).
Important safety notes
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.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Pull over as soon as it is safe to do so and
consult a qualified specialist workshop.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
If the operating safety of your vehicle is
impaired, pull over as soon as it is safe to do
so. Contact a qualified specialist workshop.
The on-board computer only shows messages
or warnings from certain systems in the mul-
tifunction display. You should therefore make
sure your vehicle is operating safely at all
times.
For an overview, see the instrument panel
illustration (
Ypage 33).
Displays and operation
Instrument cluster lighting
The light sensor in the instrument cluster
automatically controls the brightness of the
multifunction display. In daylight, the displays in the instrument cluster are illuminated. A
dimming function is not possible in daylight.
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control is located between the
instrument cluster and the COMAND Display
(
Ypage 35).
XTurn the brightness control knob clockwise
or counter-clockwise.
If the light switch (
Ypage 126) is set to
Ã, TorL, the brightness is
dependent upon the brightness of the
ambient light.
Tachometer
!
Do not drive in the overrevving range, as
this could damage the engine.
230Displays and operation
On-board computer and displays
Settings menu
Introduction
Depending on the equipment installed in the
vehicle, you have the following options in the
Settings
menu:
RChanging assistance settings
(
Ypage 244)
RChanging head-up display settings
(
Ypage 246)
RChanging the light settings (Ypage 247)
RChanging the instrument cluster settings
(
Ypage 248)
RRestoring the factory settings
(
Ypage 249)
Assistance submenu
Deactivating/activating ESP®
Observe the "Important safety notes" section
in the description of ESP®(Ypage 73).
GWARNING
If you deactivate ESP
®, ESP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP
®in the situations descri-
bed in the following.
It may be best to deactivate ESP®in the fol-
lowing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel For further information about ESP
®, see
(
Ypage 73).
XStart the engine.
XPress the òbutton on the steering
wheel to open the menu list.
XPress :or9 on the steering wheel
to select the Settings
menu.
XConfirm by pressing aon the steering
wheel.
XUse : or9 to select the DriveAs‐
sistsubmenu.
XPressato confirm your selection.
XPress the :or9 button to select
ESP
.
XPress ato confirm.
The current selection appears.
XTo activate/deactivate: press thea
button again.
ESP
®is deactivated if the åwarning lamp
in the instrument cluster lights up continu-
ously when the engine is running.
If the ÷ warning lamp lights up continu-
ously, ESP
®is not available due to a malfunc-
tion.
Observe the information on warning lamps
(
Ypage 290).
Observe the information on display messages
(
Ypage 252).
Automatic activation of Night View Assist
Plus
XPress òon the steering wheel to open
the menu list.
XPress :or9 on the steering wheel
to select the Settings
menu.
XConfirm by pressing aon the steering
wheel.
XUse : or9 to select the DriveAs‐
sistsubmenu.
XPressato confirm your selection.
XPress the :or9 button to select
Night View Assist
.
244Menus and submenus
On-board computer and displays
XConfirmbypressing aon the steering
wheel.
XPress :or9 to select the Lights
submenu.
XPressato confirm.
XPress the :or9 button to select the
Spotlight
function.
XPress the abutton to save the setting.
When the spotlight function isactivated,
the assistance graphic shows the pedes-
trian symbol.
Further information on the spotlight function
(
Ypage 221).
Switching the daytime running lamps on/
off
This function isnot availab le inCanada.
XPress the òbutton on the steering
wheel to open the menu list.
XPress :or9 on the steering wheel
to select the Settings
menu.
XConfirmbypressing aon the steering
wheel.
XPress :or9 to select the Lights
submenu.
XPressato confirm.
XPress :or9 to select the Daytime
Running Lightsfunction.
If the Daytime Running Lights
function
has been switched on, the cone of light and
the W symbol in the multifunction dis-
play are shown in whit e.
XPress theabutton to save the setting.
Further information on daytime running
lamps Daytime Running Lights
(Ypage 124).
Instrument cluster submenu
Selecting the distance unit
TheDisplay
UnitSpeed-/Odometerfunc-
tion allows you to choose whether certain
disp lays appear inkilometers or miles inthe
multifunction display.
XPress the òbutton on the steering
wheel to open the menu list.
XPress the :or9 button on the steer-
ing wheel to select the Settings
menu.
XConfirmbypressing aon the steering
wheel.
XPress :or9 to select the Instru‐
ment Clustersubmenu.
XPressato confirm.
XPress the :or9 button to select the
Display Unit Speed-/Odometer
func-
tion.
The current setting km
orMilesappears.
XPress the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
Rspeedometer
Rdigital speedometer inthe Tripmenu
Radditional speedometer inthe status area
of the multifunction display.
The unit inthe additional speedometer is
displayed inversely to the selected dis-
tance unit.
Rodometer and tr ipodometer
Rthe tr ipcomputer
Rthe current consumption and the range
Rnavigation instructions inthe Navimenu
Rcruise control
RSPEEDTRONIC
RDIST RONIC PLUS
RDIST RONIC PLUS withSt eering Assist and
St op&Go Pilot
RASSYST PLUS service interval display
Switching the additional speedometer
on/off
The Additional Speedometer [km/h]
function allows you to choose whether the
status area inthe multifunction display shows
the speed digitally. The unit inthe additional
speedometer isalways inverse to the speed-
ometer unit.
248Menus and submenus
On-board computer and displays
Safety systems
Display messagesPossible causes/consequences andMSolutions
!÷
Currently Unavail‐
able See Opera‐
tor's Manual
ABS (Anti-lock Brake System), ESP®(Electronic Stability Program),
BAS (Brake Assist), PRE‑ SAFE®, the HOLD function, Hill Start
Assist, Crosswind Assist, STEER CONTROL, Active Lane Keeping
Assist and Active Blind Spot Assist are temporarily unavailable.
BAS PLUS with Cross-Traffic Assist, PRE‑ SAFE
®Brake, PRE‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
In addition, the ÷and! warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
For example, the on-board voltage may be insufficient.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XDrive on carefully.
Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the multifunction display still shows the display message:
XDrive on carefully.
XVisit a qualified specialist workshop.
!÷
Inoperative See
Operator's Manual
ABS, ESP®, BAS, PRE‑SAFE®, the HOLD function, Hill Start Assist,
Crosswind Assist, STEER CONTROL, Active Lane Keeping Assist
and Active Blind Spot are unavailable due to a malfunction.
BAS PLUS with Cross-Traffic Assist, PRE‑SAFE
®Brake, PRE‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
The $ (USA only) or J(Canada only), ÷and! warn-
ing lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
GWARNING
252Display messages
On-board computer and displays
Warning and indicator lamps in the instrument cluster
General notes
Some systems carry out a self-diagnosis when the ignition is switched on. Therefore, some
indicator and warning lamps may light up or flash temporarily. This behavior is non-critical.
These indicator and warning lamps only indicate a malfunction if they light up or flash after
starting the engine or whilst driving.
Safety
Seat belts
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
üNAfter starting the engine, the red seat belt warning lamp lights up for
6 seconds.
The seat belt warning lamp reminds the driver and front passenger to fasten
their seat belts.
XFasten your seat belt (Ypage 48).
üN After starting the engine, the red seat belt warning lamp lights up. In addi-
tion, a warning tone sounds for up to 6 seconds.
The driver's seat belt is not fastened.
XFasten your seat belt (Ypage 48).
The warning tone ceases.
Warning and indicator lamps in the instrument cluster285
On-board computer and displays
Z
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
üNThe red seat belt warning lamp lights up after the engine starts, as soon as
the driver's or the front-passenger door is closed.
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 48).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow them in a
secure place.
The warning lamp goes out.
üN The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or front passenger has not fastened their seat belt. The vehicle is
being driven faster than 15 mph (25 km/h) or has briefly been driven faster
than 15 mph (25 km/h).
XFasten your seat belt (Ypage 48).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicle is being driven
faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph
(25 km/h).
XRemove the objects from the front-passenger seat and stow them in a
secure place.
The warning lamp goes out and the intermittent warning tone ceases.
286Warning and indicator lamps in the instrument cluster
On-board computer and displays