engine MERCEDES-BENZ CLA-Class 2017 C117 Manual Online

(200 km/h) range. If ATTENTION ASSIST
detects typical indicators of fatigue or increas-
ing lapses in concentration on the part of the
driver, it suggests taking a break.
Important safety notes
ATTENTION ASSIST is only an aid to the driver. It
might not always recognize fatigue or increasinginattentiveness in time or fail to recognize them
at all. The system is not a substitute for a well-
rested and attentive driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all:
Rif the length of the journey is less than approx-
imately 30 minutes
Rif the road condition is poor, e.g. if the surface
is uneven or if there are potholes
Rif there is a strong side wind
Rif you have adopted a sporty driving style with
high cornering speeds or high rates of accel-
eration
Rif you are predominantly driving slower than
37 mph (60 km/h) or faster than 125 mph
(200 km/ h)
Rif the time has been set incorrectly
Rin active driving situations, such as when you
change lanes or change your speed
ATTENTION ASSIST is reset when you continue
your journey and starts assessing your tiredness
again if:
Ryou switch off the engine
Ryou take off your seat belt and open the driv-
er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level
You can have current status information dis-
played in the assistance menu (Ypage 182) of
the on-board computer.
XSelect the Assistance display for Attention
Assist using the on-board computer
(
Ypage 182).
The following information is displayed:
RLength of the journey since the last break.
RThe AttentionLeveldetermined by ATTEN-
TION ASSIST, displayed in a bar display in five
levels from high to low
RIf ATTENTION ASSIST is unable to calculate
the attention level and cannot output a warn-
ing, the System Passive
message appears.
The bar display then changes the display,
such as when you are driving at a speed below
37 mph (60 km/h) or above 124 mph
(200 km/h).
Activating ATTENTION ASSIST
XActivate ATTENTION ASSIST using the on-
board computer (Ypage 183).
The system determines the attention level of
the driver depending on the setting selected:
Standard
selected: the sensitivity with which
the system determines the attention level is set
to normal.
Sensitive
selected: the sensitivity is set
higher. The attention level detected by Attention
Assist is adapted accordingly and the driver is
warned earlier.
When ATTENTION ASSIST is deactivated, the
é symbol appears in the multifunction dis-
play in the assistance graphic display.
When ATTENTION ASSIST has been deactivated,
it is automatically reactivated after the engine
has been stopped. The sensitivity selected cor-
responds to the last selection activated (stand-
ard/sensitive).
Warning in the multifunction display
If fatigue or increasing lapses in concentration
are detected, a warning appears in the multi-
function display: ATTENTION ASSIST
Take aBreak!.
In addition to the message shown in the multi-
function display, you will then hear a warning
tone.
170Driving systems
Driving and parking

Important safety notes
GWARNING
If you operate information systems and com-
munication equipmen tintegrate din th evehi-
cle while driving ,you will be distracte dfrom
traffic conditions. You could also lose control
of th evehicle. Ther eis aris kof an accident.
Only operate th eequipmen twhen th etraffic
situation permits. If you are no tsur ethat this
is possible ,park th evehicl epayin gattention
to traffic condition sand operate th eequip-
men twhen th evehicl eis stationary.
You must observ eth elegal requirements for th e
country in whic hyou are currentl ydriving when
operating th eon-board computer.
GWARNIN G
If th einstrumen tcluste rhas faile dor mal-
functioned, you may no trecognize function
restriction sin systems relevan tto safety. The
operating safet yof your vehicl emay be
impaired .Ther eis aris kof an accident.
Drive on carefully. Hav eth evehicl echecke d
at aqualified specialist workshop immedi-
ately.
The on-board computer only shows message sor
warning sfrom certain systems in th emultifunc-
tion display. You should therefor emak esur e
your vehicl eis operating safely at all times .
If th eoperating safet yof your vehicl eis
impaired ,pull ove ras soo nas it is saf eto do so.
Contac t aqualified specialist workshop.
Fo ran overview, see th einstrumen tpanel illus-
tration (
Ypage 32).
Displays and operation
Instrument cluster lighting
The ligh tsensor in th einstrumen tcluste rauto -
matically control sth ebrightness of th emulti-
function display. In daylight, th edisplays in th e
instrumen tcluste rare no tilluminated.
The lighting in th einstrumen tcluster, in th edis-
plays and th econtrol sin th evehicl einterior can
be adjusted usin gth ebrightness control knob. The brightness control knob is locate
don th e
botto mleftof th einstrumen tcluste r
(
Ypage 32).
XTurn th ebrightness control knob clockwise or
counter-clockwise.
If th eligh tswitch is set to th eÃ, Tor
L position ,th ebrightness is dependen t
upon th ebrightness of th eambien tlight.
Speedometer with segments
The speedometer is divided int osegments on
vehicles wit hDistanc ePilot DISTRONIC.
The segments in th espeedometer indicat e
whic hspee drange is available.
RDistanc ePilot DISTRONI Cis activated
(Ypage 150):
On eor two segments in th eset spee drange
ligh tup.
RDistanc ePilot DISTRONI Cdetects avehicl ein
fron tmoving mor eslowly than th estore d
speed:
The segments between th espee dof th evehi-
cle in fron tand th estore dspee dligh tup.
Tachometer
!
Do no tdriv ein th eoverrevving range, as this
could damag eth eengine.
The red ban din th etachometer indicates th e
engine's overrevving range.
The engin eis limite dwithin arange to protect
th eengin ewhen th ered ban dis reached.
Outside temperature display
You should pay special attention to road condi-
tion swhen temperatures are aroun dfreezing
point.
Bea rin min dthat th eoutside temperature dis-
play indicates th etemperature measured and
does no trecord th eroad temperature.
The outside temperature display is in th emulti-
function display (
Ypage 176).
Ther eis ashort delay before achang ein outside
temperature appear sin th emultifunction dis-
play.
174Displays and operation
On-board computer and displays

Coolant temperature gauge
GWARNING
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.
The coolant temperature gage is in the instru-
ment cluster on the right-hand side (
Ypage 32).
The Hmarking in the coolant temperature gauge
corresponds to a coolant temperature of
approximately 248 ‡ (120 †).
Under normal operating conditions and at the
correct coolant level, the coolant temperature
gauge may rise to the Hmarking.
Operating the on-board computer
Overview
:Multifunction display
;Right control panel
=Left control panel
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.
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
Displays and operation175
On-board computer and displays
Z

Assistance menu
Introd uction
Dependin gon th eequipmen tinstalled in th e
vehicle, you hav eth efollowin goption sin th e
DriveAssist
menu:
RDisplaying th eassistanc egraphic
(Ypage 182)
RDeactivating/activating ES P®(except
Mercedes ‑AM Gvehicles) (Ypage 182)
RActivating/deactivating Active Brake Assis t
(Ypage 182)
RActivating/deactivating ATTENTION ASSIST
(Ypage 183)
RActivating/deactivating Blind Spot Assis t
(Ypage 183)
RActivating/deactivating Lan eKeepin gAssis t
(Ypage 183)
Displaying the assistance graphic
XPress th e= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress 9or: to select Assistanc eGraphic.
XPressato confirm .
The multifunction display shows th edistanc e
display of Distanc ePilo tDISTRONI Cin th e
assistanc egraphic .
The assistanc egraphic displays th estatus of
and information from th efollowin gdrivin g
systems or drivin gsafet ysystems :
RDistancePilo tDISTRONI C (Ypage 150)
RActive Brake Assis t (Ypage 61)
RATTENTION ASSIST (Ypage 169)
RLaneKeepin gAssis t (Ypage 172)
XPress :to display th eATTENTION ASSIST
assessment.
Deactivating/activating ESP®
Observ eth eimportant safet ynote son ES P®
(Ypage 63).
GWARNIN G
If you deactivat eES P
®,ES P®no longer sta-
bilizes th evehicle. There is an increased ris k
of skiddin gand an accident.
Only deactivat eES P
®in th esituation sdescri-
bed in th efollowing.
It may be best to deactivat eES P
®in th efollow-
ing situations:
Rwhen usin gsnow chain s
Rin deep snow
Ron sandor gravel
Deactivating/activating ES P®in Mercedes-
AM Gvehicles (Ypage 65).
Fo rfurther information about ES P®,see
(Ypage 63).
XStart th eengine.
XPress th e= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress 9or: to select ESP.
XPressato confirm .
The curren tselection appears.
XTo activate/deactivate: press thea but-
to nagain .
ES P
®is deactivated if th eå warning lamp
in th einstrumen tcluste rlights up continu -
ously when th eengin eis running.
If th e÷ andå warning lamp sligh tup
continuously, ES P
®is notavailable due to amal-
function .
Observ eth einformation on warning lamp s
(
Ypage 219).
Observ eth einformation on display message s
(
Ypage 189).
Activating ordeactivating Active Brake
Assist
XPress th e= or; buttonon th esteering
whee lto select th eDriveAssistmenu.
XPress th e9 or: buttonto select
Brake Assist.
182Menus and submenus
On-board computer and displays

For further information on the automatic locking
feature, see (Ypage 76).
Activating/deactivating the acoustic
locking verification signal
If you switch on theAcousticLockfunction, an
acoustic signal sounds when you lock the vehi-
cle.
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Vehiclesubmenu.
XPress ato confirm.
XPress the :or9 button to select the
Acoustic Lockfunction.
If the Acoustic Lockfunction is activated,
the multifunction display shows the &
symbol in orange.
XPress the abutton to save the setting.
Convenience
Switching the fold-in mirrors when lock-
ing feature on/off
This function is only available in Canada.
This function is only available when the vehicle is
equipped with the electrical fold-in function.
When you activate the Auto.
MirrorFoldingfunction, the exterior mirrors are folded in when
the vehicle is locked. If you unlock the vehicle
and then open the driver's or front-passenger
door, the exterior mirrors fold out again.
If you have switched on the Auto. Mirror
Foldingfunction and you fold in the exterior
mirrors using the button on the door
(
Ypage 96), they will not fold out automatically.
The exterior mirrors can then only be folded out
using the button on the door.
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Conveniencesubmenu.
XPress ato confirm.
XPress the :or9 button to select the
Auto. Mirror Foldingfunction.
If the Auto. Mirror Foldingfunction is
switched on, the multifunction display shows
the exterior mirror in orange.
XPress the abutton to save the setting.
Restoring the factory settings
XPress the =or; button on the steering
wheel to select the Sett.menu.
XPress the:or9 button to select the
Factory Settingsubmenu.
XPress ato confirm.
The Reset All Settings?function
appears.
XPress the :or9 button to select Noor
Yes.
XPress the abutton to confirm the selec-
tion.
If you have selected Yes
, the multifunction
display shows a confirmation message.
For safety reasons, the Daytime Running
Lightsfunction in theLightsubmenu is only
reset if the vehicle is stationary.
AMG menu (Mercedes-AMG vehicles)
Warm-up
:Digital speedometer
;Gear indicator
=Upshift indicator
?Engine oil temperature
ACoolant temperature
BTransmission fluid temperature
XPress the =or; button on the steering
wheel to select the AMGmenu.
Upshift indicator: upshift indicatorUP=
indicates that the engine has reached the
overrevving range when in the manual drive
program.
Engine and transmission oil temperature:
when the engine and transmission are at nor- mal operating temperature, oil tempera-
ture ?and Bare displayed in white in the
multifunction display.
If the multifunction display shows oil temper-
ature ?orB in blue, the engine or the
transmission are not yet at normal operating
Menus and submenus185
On-board computer and displays
Z

temperature. Avoid driving at full engine out-
put during this time.
SETUP
:DriveComfort/Sport/Sport +
;Chassis Comfort/Sport/Sport +
=Transmission D/M
?ESP®On/Offor SPORT handling mode
Sport
SETUP displays the following information and
functions:
Rthe digital speedometer
Rthe gear indicator
Rthe drive system setting
Rthe suspension mode
Rthe transmission position
Rthe ESP®(Electronic Stability Program) status
XPress =or; on the steering wheel to
select the AMGmenu.
XPress9repeatedly until SETUP appears.
RACETIMER
Displaying and starting RACETIMER
:Lap
;RACETIMER
The RACETIMER is only intended for use on a
closed race circuit. Do not use the function on
public roads. You can start the RACETIMER when the engine is
running or if the SmartKey is in position
2in the
ignition lock.
XPress =or; on the steering wheel to
select the AMGmenu.
XPress the9button repeatedly until the
RACETIMER appears.
XTo start: press the abutton to start the
RACETIMER.
Displaying the intermediate time
XPress the =or; button to select
Interm. Time.
XPress ato confirm.
The intermediate time appears for five sec-
onds.
Starting a new lap
:RACETIMER
;Fastest lap time (best lap)
=Lap
XPress ato confirm New Lap.
iIt is possible to store a maximum of sixteen
laps. The 16th lap can only be completed with
Finish Lap
.
Stopping the RACETIMER
186Menus and submenus
On-board computer and displays

XPress the%button on the steering wheel.
XConfirm Yeswitha.
The RACETIMER interrupts timing if you stop the
vehicle and turn the SmartKey to position 1in
the ignition lock. If you turn the key to position 3
and then press ato confirm Start
, timing is
continued.
Resetting the current lap
XStop the RACETIMER.
XPress the =or; button to select
Reset Lap.
XPress ato reset the lap time to "0".
Deleting all laps
If you switch off the engine, the RACETIMER is
reset to "0" after 30 seconds. All laps are
deleted.
You cannot delete individual stored laps. If you
have stopped 16 laps, the current lap does not
have to be reset.
XReset the current lap.
XPress ato confirm Reset.
Reset Race-Timer?appears in the multi-
function display.
XPress the :button to select Yesand press
the a button to confirm.
All laps are deleted.
Overall statistics
:RACETIMER overall evaluation
;Total time driven
=Average speed
?Distance covered
AMaximum speed
This function is shown if you have stored at least
one lap and stopped the RACETIMER.
XPress the =or; button on the steering
wheel to select the AMGmenu.
XPress the9button repeatedly until the
overall evaluation appears.
Lap statistics
:Lap
;Lap time
=Average lap speed
?Lap length
ATop speed during lap
This function is only available if you have stored
at least two laps and have stopped the RACE-
TIMER.
XPress the =or; button on the steering
wheel to select the AMGmenu.
XPress9repeatedly until a lap evaluation
appears.
Each lap appears in a separate submenu. The
fastest lap is indicated by flashing symbol :.
XPress the9or: button to select a dif-
ferent lap evaluation.
Menus and submenus187
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dor released. It then
goe sout or remain slit .
The electric parking brak eis malfunctioning .
XSwitchoff th eignition and tur nit bac kon .
XApply th eelectric parking brake.
If it is no tpossibl eto engage th eelectric parking brake:
XShift th etransmission to position P.
XVisitaqualified specialist workshop .
If it is no tpossibl eto release th eelectric parking brak emanually:
XReleas eth eelectric parking brak eautomatically (Ypage 141).
If th eelectric parking brak estill canno tbe released:
XConsult aqualified specialist workshop .
The yellow!warning lamp lights up. If you manually apply or
release th eelectric parking brake, th ered F (USAonly) or !
(Canada only) indicator lamp flashes .
The electric parking brak eis malfunctioning .It is no tpossibl eto apply
th eelectric parking brak emanually.
XShift th eselector lever to P,as th eelectric parking brak eis no t
applie dautomatically.
XVisit aqualified specialist workshop .
F(USA
only)
!( Canada
only)
Parkin gBrake Inop‐
erativ e
The yellow !warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dor released. It then
goe sout or remain slit .
The electric parking brak eis malfunctioning ,e.g. because of over-
voltag eor undervoltage.
XRemove th ecaus efor th eovervoltage or undervoltage, e.g. by
charging th ebattery or restarting th eengine.
XEngage or release th eelectric parking brake.
If it remain simpossible to apply or release th eelectric parking brake:
XSwitc hoff th eignition and tur nit bac kon .
XEngage or release th eelectric parking brake.
If th eelectric parking brak estill canno tbe released:
XConsult aqualified specialist workshop .
If th eelectric parking brak estill canno tbe applied:
XVisit aqualified specialist workshop .
Display messages193
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up and th ered F (USAonly)
or ! (Canada only) indicator lamp flashes .
It is no tpossibl eto apply th eelectric parking brak emanually.
XShift th etransmission to position P.
XVisitaqualified specialist workshop .
$(USA
only)
J( Canada
only)
Check Brake Fluid
Level
There is no tenough brak efluid in th ebrak efluid reservoir .
A warning tone sounds. The $(USAonly) or J(Canada only)
warning lamp sin th einstrumen tcluste rmay also ligh tup.
GWARNIN G
The braking effec tmay be impaired.
There is aris kof an accident.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions. Do no tcontinu edrivin g
under any circumstances.
XSecur eth evehicl eagainst rollin gaway (Ypage 140).
XConsult aqualified specialist workshop .
XDo notadd brak efluid .This does no tcorrec tth emalfunction .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
XVisit aqualified specialist workshop .
G
Inoperative
Oneor mor emain features of th embrace system are malfunctioning .
XVisitaqualified specialist workshop .
ActiveBrakeAssistFunctionsCurrentlyLimitedSee Opera‐tor's Manual
Active Brake Assis tis temporarily inoperative.
Possibl ecauses are:
Rth eradar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation
Rth esystem is outside th eoperating temperature range
Rth eon-boar dvoltag eis to olow
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Active Brake Assis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 140).
XRestart th eengine.
Active BrakeAssist :SystemInop‐erative
Active Brake Assis tis unavailable due to amalfunction .Situation -
dependen tparking assistanc emay also hav efailed.
XVisit aqualified specialist workshop immediately.
194Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
RadarSensorsDirtySee Operator' sMan ‐ual
The radar sensor system is malfunctioning .
Possibl ecauses are:
RDirt on sensor s
RHeavy rain or snow
RWhendrivin gon inter-urban roads without traffic or infrastructure,
e.g. in desert-like area s
At least on edrivin gsystem or drivin gsafet ysystem is malfunctioning
or is temporarily unavailable :
RActive Brake Assist
RDistancePilo tDISTRONI C
A warning tone also sounds.
Once th ecaus eof th eproblem is no longer present, th edrivin gand
drive safet ysystems will be available again .The display message dis-
appears.
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 140).
XSwitchoff th eengine.
XClean all sensor s (Ypage 262).
XRestart theengine.
The display message disappears.
6
SRSMalfunctionSer ‐viceRequired
The restrain tsystem is malfunctioning .The 6 warning lamp also
lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbe triggered .
There is an increased ris kof injury.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th erestrain tsystem, see (
Ypage 39).
6
Front Lef tMalfunc‐tio nServic eRequiredorFrontRight MalfunctionServic eRequired
The restrain tsystem is malfunctioning at th efron ton th elef tor right .
The 6 warning lamp also lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbe triggered .
There is an increased ris kof injury.
XVisit aqualified specialist workshop immediately.
Display messages19 5
On-board computer and displays
Z