2018 MERCEDES-BENZ CLA COUPE warning lights

GWARNING
If ESP
®is malfunctioning, ESP®is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully.H ave ESP
®checked at a
qualified specialist workshop.
Vehicles without 4MATIC: when towing your
vehiclew ith the front axle raised, it is important
that you observe the notes on ESP
®
(Ypage2 82).
If the å ESP®OFF warning lamp lights up
continuously,E SP®is deactivated.
If the ÷ ESP®warning lamp and the å
warning lamp are lit continuously,E SP®is not
available due to amalfunction.
Observe the information on warning lamps
(
Ypage2 21) and display messages which may
be shownint he instrument cluster
(
Ypage1 92).
Only use wheels with the recommendedt ire
sizes. Only then wil lESP
®function properly.
Characteristics of ESP®
General information
If the ÷ ESP®warning lamp goes out before
beginning the journey ,ESP®is automatically
active.
If ESP
®intervenes, the ÷ESP®warning lamp
flashes in the instrument cluster.
If ESP
®intervenes:
XDo not deactivate ESP®under any circum-
stances.
XOnly depress the accelerator pedalasf ar as
necessary when pulling away.
XAdapt you rdriving style to sui tthe prevailing
road and weather conditions.
ECOs tart/stop function
The ECO start/stop function switches the
engine off automatically when the vehicles tops
moving. The engine starts automatically when
the driverw ants to pullawa ya gain. ESP
®
remains in its previousl yselected status. Exam-
ple: if ESP®was deactivated before the engine
was switched off, ESP®remains deactivated
when the engine is switched on again.
Deactivating/activating ESP®(except
Mercedes‑AMG vehicles)
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage6 1).
You can select between the following states of
ESP
®:
RESP®is activated.
RESP®is deactivated.
GWARNING
If you deactivate ESP
®,E SP®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.
The spinning of the wheels results in acutting
action for better traction on looses urfaces.
It may be best to deactivate ESP
®in the follow-
ing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
iActivate ESP®as soon as the situations
described above no longer apply.E SP®will
otherwise not be abl etostabilize the vehiclei f
the vehicles tarts to skid or awhee lstarts to
spin.
!Avoid spinning the drivenw heels for an
extended period with ESP®deactivated. You
coul dotherwise damage the drivetrain.
Deactivating/activating ESP®
You can deactivate or activate ESP®via the on-
board computer (Ypag e185).
ESP®deactivated:
The å ESP®OFF warning lamp in the instru-
ment cluster lights up.
ESP
®activated:
The å ESP®OFF warning lamp in the instru-
ment cluster goes out.
Driving safety systems65
Safety
Z

Characteristics when ESP®is deactivated
If ESP®is deactivatedand oneorm orew heels
start to spin,t he÷ ESP®warning lamp in the
instrumentc lusterflashes. In suchs ituations,
ESP
®will no tstabilizet hevehicle.
If you deactivate ESP®:
RESP®no longer improve sdriving stability.
REnginet orque is no longer limited and the
driv ewheels are able to spin.
RTractio ncontrol is still activated.
RActiv eBrake Assist is no longer available; nor
is it activated if you brak efirmly with assis-
tance from ESP
®.
RSTEER CONTROL is no longer active.
RESP®still provides support when you brake
firmly.
Deactivating/activatin gESP®
(Mercedes ‑AM Gvehicles)
Important safety notes
iObserv ethe "Important safety notes" sec-
tio n(Ypage 61).
You can selectb etween thefollowings tate so f
ESP
®:
RESP®is activated.
RSPORT handlingm ode is activated.
RESP®is deactivated.
GWARNING
When SPORT handlingm ode is activated,
there is agreate rrisk of skiddinga nd acci-
dents.
Only activat eSPORT handlingm ode in thesit-
uations describe dinthefollowing.
GWARNING
If you deactivate ESP
®,E SP®no longer sta-
bilizes th evehicle .Thereisani ncreased risk
of skiddinga nd an accident.
Only deactivate ESP
®in th esituations descri-
bed in th efollowing. In th
efollowings ituations,itmay be bette rto
activat eSPORT handlingm ode or deactivate
ESP
®:
Rwhen usings nowc hains
Rind eep snow
Ron sandorg ravel
Ron specially designated roads when th evehi-
cle's own oversteering and understeering
characteristics are desired
Drivin ginSPORT handlingm ode or without
ESP
®requires an extremely qualified and expe-
rienced driver.
iActivate ESP®as soon as th esituations
describe dabovenol onger apply. ESP®will
otherwise no tbeable to stabilizet hevehicle if
th ev ehicle start stoskidoraw heel start sto
spin.
!Avoid spinnin gthe driven wheels for an
extended period with ESP®deactivated. You
coul dotherwise damage th edrivetrain.
Deactivating/activatin gESP®
XTo activate SPORTh andling mode: briefly
pres sbutton :.
The M SPORT handlingm ode warning
lamp in th einstrumentc lusterlightsu p. The
SPORT handling mode
message appearsi n
th em ultifunction display.
XTo deactivat eSPORTh andling mode:
briefly pres sbutton :.
The M SPORT handlingm ode warning
lamp in th einstrumentc lustergoes out.
66Driving safety systems
Safety

XTo deactivate ESP®:press button :until
the å ESP®OFF warning lamp lights up in
the instrument cluster.
The ÷ OFF
message appears in the multi-
functio ndisplay.
XTo activate ESP®:briefl ypress button :.
The å ESP®OFF warning lamp in the
instrument cluster goe sout.T he ÷ ESP®
ONmessage appears in the multifunctio ndis-
play.
Characteristic sofactivatedS PORT han-
dling mode
If SPOR Thandling modeisa ctivatedand one or
more wheels start to spin, the ÷ESP®warn-
ing lamp in the instrument cluster flashes. ESP®
onlys tabilizes the vehicl etoalimite dd egree.
Whe nSPOR Thandling modeisa ctivated:
RESP®onlyimprovesd riving stability to alim i-
ted degree.
RTractio ncontroliss tilla ctivated.
RThe engine's torque is onlyr estrictedtoa
limite ddegreea nd the drive wheels may start
to spin.
The spinning of the wheels results in acutting
action for better tractio nonloose surfaces.
RESP®stil lprovides support when yo ubrake
firmly.
Characteristic swhenE SP®is deactivated
If ESP®is deactivate dand one or more wheels
start to spin, the ÷ESP®warning lamp in the
instrument cluster does not flash. In such situa-
tions, ESP
®will not stabilize the vehicle.
If yo udeactivate ESP®:
RESP®no longer improvesd riving stability.
REngine torque is no longer limite dand the
drive wheels are able to spin.
The spinning of the wheels results in acutting
action for better tractio nonloose surfaces.
RTractio ncontroliss tilla ctivated.
RActive Brake Assist is no longer available ;nor
is it activate difyoubrake firmly with assis-
tance from ESP
®.
RESP®stil lprovides support when yo ubrake
firmly.
ESP®trailer stabilization
General information
If your vehicle/trailer combinatio nbegin sto
swerve ,ESP®assists yo uinthissituation. ESP®
slowst he vehicl edownbyb raking and limiting
the engine outputu ntilthe vehicle/trailer com-
bination hass tabilized.
Important safety notes
GWARNING
If roada nd weather conditions are poor,
traile rstabilization will not be able to prevent
the vehicle/trailer combinatio nfrom swerv-
ing .Trailers with ahighc ente rofg ravity can
tip overb efore ESP
®can detect this. There is
ar iskofana ccident.
Alway sadapt your driving style to the prevail-
ing roada nd weather conditions.
If your vehicl ewitht raile r(vehicle/trailer com-
bination) begins to lurch, yo ucan onlys tabilize
the vehicle/trailer combinatio nbydepressing
the brake firmly.
ESP
®traile rstabilization is active above speeds
of about65k m/h.
ESP
®traile rstabilization does not work if ESP®
is deactivate dordisable dbecause of amalfunc-
tion.
EBD (electronicb rake forcedistribu-
tion)
General information
EBD monitors and controls the brake pressure
on the rearw heelstoi mprove driving stability
whil ebraking.
Important safety notes
iObserve the "Important safety notes "sec-
tio n(Ypage 61).
GWARNING
If EBD is malfunctioning ,the rearw heelscan
lock, e.g .under ful lbraking .Thisi ncreases the
ris kofs kidding and an accident.
Driving safety systems67
Safety
Z

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 arisk 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 object stothe
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 object stothe
SmartKey. Remove any bulky key rings before
insertingt he SmartKey into the ignition lock.
!Keep the SmartKey away from stron gmag-
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. amobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. ametal case
Vehicles with KEYLESS-GO startf unction:do
not keep the SmartKey in the trunk.O therwise,the SmartKey may not be detected, e.g. when
startin
gthe engine using the Start/Stop button.
SmartKey functions
:& To lock the vehicle
;FTo open the trunk lid
=%To unlock the vehicle
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: 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.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the remote
control (see the separate operating instruc-
tions).
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 187).
XTo open the trunk lid automatically: press
and hold the Fbutton until the trunk lid
opens (
Ypage 79).
70SmartKey
Opening and closing

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 arisk of fatal
injury.
Keep batteries out of the reach of children. If
ab attery is swallowed, seek medical attention
immediately.
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
battery replaced at aqualified 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 73).
iIf the SmartKey battery is checked within
the signal reception range of the vehicle,
pressing the &or% button:
Rlocks or
Runlocks the vehicle
iYou can get abattery at any qualified spe-
cialist workshop.
Replacing the battery
You require aCR20253Vc ell battery.
XTake the mechanical key out of the SmartKey
(Ypage 72).
XPress mechanical key ;into the opening in
the SmartKey in the direction of the arrow
until battery tray cover :opens. When doing
so, do not hold cover :shut.
XRemove battery tray cover :.
XRepeatedly tap the SmartKey against your
palm until battery=falls out.
XInsert the new battery with the positive ter-
minal facing upwards. Use alint-free cloth to
do so.
XMake sure that the surface of the battery is
free of lint, grease and other contaminants.
XInsert the front tabs of battery tray cover :
and then press to close it.
XInsert mechanical key into the SmartKey
(Ypage 72).
XCheck the function of all SmartKey buttons on
the vehicle.
SmartKey73
Opening and closing
Z

Mirrors
Rear-view mirror
XAnti-glare mode:flick anti-glare lever :for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
GWARNING
You coul dlose control of you rvehicleify ou do
the following while driving:
Radjust the driver's seat, headr estraint,
steering wheelorm irrors
Rfasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, headr estraint, steer-
ing wheela nd mirror and fasten you rseat belt
before starting the engine.
GWARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you coul dmisjudge the dis-
tance from road users traveling behind, e.g.
when changing lane .There is arisk of an acci-
dent.
For this reason, alway smake sure of the
actua ldistance from the road users traveling
behind by glancing over you rshoulder.
XTurn the SmartKey to position 1or2 in the
ignitio nlock (Ypage1 22).
XExterior mirror on the front-passenger side:
press button ;.
Exterior mirror on the driver's side:p ress but-
ton :.
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button =as long as the indicator
lamp is lit.
XPress button =up, down, or to the right or
left until you have adjusted the exterior mirror
to the correct position. You should have a
good overview of traffic conditions.
The convex exterior mirrors provide alarger field
of vision.
After the engine has been started, the exterior
mirrors are automatically heated at low outside
temperatures. Heating takes amaximu moften
minutes.
iYou can als oheatu pthe exterior mirrors
manually by switching on the rear window
defroster.
96Mirrors
Seats, steering wheel and mirrors

Exteriorlighting
General notes
For reasonsofs afety, Mercedes-Ben zrecom-
mends that you driv ewith th elightss witched on
even durin gthe daytime. In somec ountries,
operatio noftheheadlamps varies due to legal
requirement sand self-imposedo bligations.
Settingthe exterio rlighting
Settin goptions
Exterior lighting can be set usingt he:
Rlight switch
Rcombinatio nswitch (Ypage 101)
Ron-board compute r(Ypage 187)
Light switch
Operation
1WLeft-hands tanding lamps
2 XRight-hand standing lamps
3TParking lamps ,licens eplatea nd
instrumen tcluste rlighting
4 ÃAutomatic headlampm ode, controlled
by th elight sensor
5LLow-beam/high-beam headlamps
B RRear fog lamp
If you hear awarning tone when you leave the
vehicle ,the lightsm ay still be switched on.
XTurn thelight switch to the Ãposition.
The exteriorl ighting (excep tthe parking/stand-
ing lamps )switches off automaticall yifyou:
Rremove th eSmartKey from th eignition lock
Ropen th edriver'sd oor with th eSmartKey in
position g
Automatic headlamp mode
Ãis thepreferred light switch position:
RThe light settin gisautomaticall yselected
according to th ebrightnes softheambient
light (exception: poor visibilityd ue to weather
conditionss uchasfog,sno wors pray).
RWiththeSmartKey in position 1in th eigni-
tio nlock: th eparking lamps are switched on
or off automaticall ydependingont hebright-
nes soft heambient light.
RWitht heengine running: if you have activated
the DaytimeR unningLightsfunction via
th eo n-board computer, th edaytime running
lamps or th eparking lamps and th elow-beam
headlamps are switched on or off automati-
cally dependingont hebrightnes softheambi-
ent light.
XTo switch on th eautomatic headlamp
mode: turnthe light switch to the Ãposi-
tion.
GWARNING
When th elight switch is set to Ã,thelow-
beam headlamps may no tbeswitched on
automaticall yifthere is fog ,sno woro ther
causes of poor visibilityd ue to theweather
conditionss uchasspray. Thereisar isk of an
accident.
In suchs ituations,tur nt he light switch to
L.
The automatic headlampf eature is only an aid.
The driver is responsible for th evehicle's light-
ing at all times.
Canada only:
The daytime runnin glamps improve th evisibility
of your vehicle durin gthe day. The daytime run-
nin glamps function is required by law in Can-
ada. It canno tthe refore be deactivated.
When th eengine is runnin gand th evehicle is
stationary: if you shiftt heautomatic transmis-
sion from adriving position to position jthe
daytime runnin glamps or low-beam headlamps
go out after 3minutes.
When th eengine is running, th evehicle is sta-
tionar yand in bright ambient light:ify ou turnthe
light switch to the Tposition,t hedaytime
runnin glamps and parking lamps tur non.
If th eengine is runnin gand you tur nthe light
switch to the Lposition,t hemanual settings
100Exterior lighting
Lightsa nd windshield wipers

XTo switchoff the high-beam headlamps:
move the combinatio nswitch back to its nor-
malp osition.
The blue Kindicator lamp in the instru-
ment cluster goe sout.
Vehicles with Adaptive Highbeam Assist:
when Adaptive Highbeam Assist is active, it
controls activation and deactivation of the
high-bea mheadlamps (
Ypage 102).
XTo switc honthe high-beam flasher: pull
the combinatio nswitch in the direction of
arrow =.
Hazard warning lamps
XTo switc honthe hazard warning lamps:
press button :.
All turn signals flash. If yo unow switch on a
turn signalu sing the combinatio nswitch ,only
the turn signall ampont he corresponding
side of the vehicl ewillf lash.
XTo switc hoff the hazard warning lamps:
press button :.
The hazard warning lamps automaticall yswitch
on if:
Ran ai rbag is deployed or
Rthe vehicl edecelerates rapidly from aspeed
of above 45 mph (70 km/h )and comestoa
standstill
The hazard warning lamps switch off automati-
cally if the vehicl ereachesas peed of above
6m ph (10 km/h )again afteraf ullb rake appli-
cation.
The hazard warning lamps stil lope rate if the
ignition is switched off.
Adaptiv eHighbeam Assist
General notes
Yo uc an us ethisf unctio ntoset the headlamps
to change between lo wbeama nd high beam
automatically. The system recognizes vehicles
with thei rlights on, either approaching from the
opposite direction or traveling in front of your
vehicle, and consequentlys witches the head-
lamps from high beam to lo wbeam. Once the
system no longer detects any otherv ehicles, it
reactivates the high-bea mheadlamps.
The system's optica lsensor is locate dbehin d
the windshield nea rthe overhead controlp anel.
Important safety notes
GWARNING
Adaptive Highbeam Assist does not recognize
roadu sers:
Rwh oh avenol ights ,e.g.p edes trians
Rwhoh avep oorlighting, e.g .cyclists
Rwhose lighting is blocked, e.g .byab arrier
On very rar eoccasions, Adaptive Highbeam
Assist mayf ailtor ecognize othe rroadu sers
thath avel ights ,orm ayrecognize them too
late. In this, or in similar situations, the auto-
matic high-bea mheadlamps will not be deac-
tivated or will be activate dregardless. There is
ar iskofana ccident.
Alway scarefull yobserve the traffic conditions
and switch off the high-bea mheadlamps in
goo dtime.
Adaptive Highbeam Assist canno ttake into
account road, weather or traffic conditions.
Adaptive Highbeam Assist is onlyana id.Y ou are
responsibl efor adjusting the vehicle's lighting
to the prevailing light, visibility and traffic con-
ditions.
In particular, the detection of obstacle scan be
restricte difthereis:
Rpoor visibility ,e.g.d ue to fog,h eavy rainor
snow
Rdirt on the sensors or the sensors are
obscured
102Exterior lighting
Lights and windshield wiper s