2018 MERCEDES-BENZ CLA COUPE check engine light

Information aboutService .............261
Resetting the service intervald is-
play. ............................................... 261
Service message ............................ 261
Specials ervice requirements ......... 261
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 68
Function ...........................................6 8
Switching off the alarm .................... 68
ATTENTIO NASSIS T
Activating/deactivating ................. 185
Displa ymessage ............................ 207
Function/note s............................. 171
Audi omenu( on-board computer) .... 182
Audi osystem
see separate operating instructions
Authorized Mercedes-Benz Center
see Qualifie dspecialist workshop
Authorized workshop
see Qualifie dspecialist workshop
AUTO lights
Displa ymessage ............................ 204
see Lights
Automatic car was h(care) ............... 262
Automatic engine start (ECO start/
stopf unction) .................................... 126
Automatic engine switch-off (ECO
start/stopf unction).......................... 126
Automatic headlamp mode .............. 100
Automatic transmission
Accelerator peda lposition ............. 133
Changing gea r............................... 133
DIREC TSELECT lever ..................... 130
Drive program. ............................... 134
Drive programd isplay .................... 130
Driving tip s.................................... 133
DYNAMIC SELECT button (all vehi-
cle se xcept Mercedes-AMGv ehi-
cles) ............................................... 128
DYNAMIC SELECT controller
(Mercedes-AMGv ehicles) .............. 129
Emergency running mode. ............. 138
Engaging drive position .................. 132
Engaging neutral ............................ 131
Engaging park position
(Mercedes-AMGv ehicles) .............. 132 Engaging park position automati-
cally ............................................... 131
Engaging reverse gea
r................... 131
Engaging the park position ............ 130 Holding the ve
hiclestationary on
uphill gradients .............................. 134
Kickdown. ...................................... 134
Manua lshifting .............................. 136
Oil temperature (on-board com-
puter, Mercedes-AMGv ehicles) ..... 188
Overview ........................................ 130
Problem (malfunction) ................... 138
Pulling away ................................... 125
Selector lever ................................ 132
Starting the engine ........................ 124
Steering wheelp addleshifters ...... 136
Transmission position display ........ 132
Transmission position display
(DIRECT SELECT lever) ................... 130
Transmission positions .................. 133
Automatic transmissio nemer-
gencym ode....................................... 138
B
Back button ....................................... 230
Backup lamp
Displa ymessage ............................ 203
BAS (Brake Assist System) ................. 61
Battery (SmartKey)
Checking .......................................... 73
Important safety notes .................... 73
Replacing ......................................... 73
Battery (vehicle)
Charging ........................................ 278
Displa ymessage ............................ 206
Important safety notes .................. 276
Jump starting ................................. 278
Belt
see Seatb elts
Bel twarning ......................................... 44
Blind SpotA ssist
Activating/deactivating (on-
board computer) ............................ 186
Displa ymessage ............................ 208
Notes/function .............................. 172
Bluetooth
®
Searching for amobilephone ........ 233
Index5

Starting (important safety notes)... 123
Starting problems .......................... 127
Starting the engine with the
SmartKey ....................................... 124
Starting via smartphone ................ 124
Starting with the Start/Sto pbut-
ton ................................................. 124
Switching off .................................. 141
Tow-starting (vehicle )..................... 284
Engine electronics
Problem (malfunction) ................... 127
Engine jump starting
see Jump starting (engine)
Engine oil
Adding ........................................... 259
Additives ........................................ 318
Checking the oill evel ..................... 258
Checking the oill evel using the
dipstick .......................................... 258
Displa ymessage ............................ 206
Filling capacity ............................... 318
Notesa boutoilgrade s................... 317
Notesono illevel/consumption .... 258
Temperature (on-board computer,
Mercedes-AMGv ehicles) ............... 188
Entering an address
see also Digital Operator's Man-
ual.................................................. 229
ESP
®(ElectronicS tability Pro-
gram)
Activating/deactivating (on-
board computer) ............................ 219
AMG menu (on-board computer) ... 188
Characteristics ................................. 65
Deactivating/activating (button
in Mercedes-AMGv ehicles) ............. 66
Deactivating/activating (except
Mercedes‑ AMG vehicles) ................. 65
Deactivating/activating (on-
board computer, except
Mercedes-AMGv ehicles) ............... 185
Displa ymessage ............................ 192
Function/note s................................ 64
Generaln otes .................................. 64
Important safety information ........... 64
Trailer stabilization ........................... 67
Warning lamp ................................. 221 ETS/4ETS (ElectronicT
raction Sys-
tem) ...................................................... 64
Exhaust
see Exhaus tpipe
Exhaustc heck................................... 144
Exhaustp ipe
Cleaning ......................................... 266
Ex terio
r lighting
Cleaning ......................................... 265
see Lights
Exterior mirrors
Adjusting ......................................... 96
Dipping (automatic) ......................... 97
Folding in when locking (on-board
computer) ...................................... 188
Folding in/out (automatically )......... 97
Folding in/out (electrically) ............. 97
Outofp osition (troubleshooting )..... 97
Setting ............................................. 97
Storing settings (memory func-
tion) ................................................. 99
Storing the parking position ............. 98
Eyeglassesc ompartment ................. 238
F
Favorites
Overview ........................................ 231
Filler cap
see Refueling
First-aidk it......................................... 270
Flat tire
MOExtended tire s.......................... 271
Preparing the vehicl e..................... 271
TIREFIT kit ...................................... 272
Floormats ........................................... 256
Frequencies
Mobil ephone ................................. 313
Two-way radio ................................ 313
Fuel
Additives ........................................ 317
Consumption statistics .................. 180
Displaying the current consump-
tion ................................................ 180
Displaying the rang e...................... 180
Driving tip s.................................... 144
E10 ................................................ 316
Fue lgauge ....................................... 33
10Index

Restraint system warninglamp
The functions of the restraint system are
checke dafterthe ignition is switched on and at
regular interval swhile the engine is running.
Therefore, malfunctions can be detected in
goodt ime.
The 6 restraint system warning lamp on the
instrument cluster lights up when the ignition is
switched on. It goeso utno later than afew sec-
onds afte rthe vehicl eisstarted. The compo-
nents of the restraint system are in operational
readiness.
Am alfunction haso ccurred if the6restraint
system warning lamp:
Rdoe snot light up afte rthe ignition is switched
on
Rdoe snot go outa fteraf ew seconds with the
engine running
Rlights up agai nwhile the engine is running
GWARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deplo yas
intended during an accident. Thisc an affect
for exampl ethe Emergency Tensioning
Device or the ai rbag.Thisp oses an increased
ris kofi njury or evenf atalinjury.
Have the restraint system checke dand
repaired in aquali fied specialist workshopa s
soona spossible.
PASSENGER AI RBAG indicator lamp
PASSENGER AIR BAG ON indicator lamp :and
PASSENGER AIR BAG OFF indicator lamp ;are
part of the Occupant Classification System
(OCS). The indicator lamps display the statu
softhe
front-passenger front ai rbag.
RPASSENGER AIR BAG ON lights up for 60 sec-
onds ,sub sequently both indicator lamps are
off (PASSENGER AIR BAG ON and OFF):t he
front-passenger front ai rbag is able to deploy
in the event of an accident.
RPASSENGER AIR BAG OFF lights up :the front-
passenger front ai rbag is deactivated. It will
then not be deploye dinthe event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator lamp shows the statu softhe front-passenger
front ai rbag.T he PASSENGER AIR BAG OFF
indicator lamp may be li tcontinuously or be off.
Depending on the person in the front-passenger
seat, the front-passenger front ai rbag must
either be deactivated or enabled; see the fol-
lowing points. Yo umustm ake sure of this both
before and during ajourney.
RChildreninac hild restraintsystem:
whethert he front-passenger front ai rbag is
enabled or deactivated depends on the instal- le dc hild restraint system, and the ag eand
size of the child .Therefore, be sure to observe
the notes on the "Occupant Classification
System (OCS)" (
Ypage 47 )and on "Chil-
dre nint he vehicle" (Ypage 54). There you
will also find instructions on rearward and
forward-facing child restraint systems on the
front-passenger seat.
RAl lo the rpersons: depending on the classi-
fication of the person in the front-passenger
seat, the front-passenger front ai rbag is ena-
bled or deactivated (
Ypage 47). Be sure to
observe the notes on "Seat
belts“ (
Ypage 41 )and "Ai rbags"
(Ypage 45). There yo ucan also find infor-
mation on the correct seatp osition.
Seat belts
Introduction
Seatb elts are the most effective means of
restricting the movement of vehicl eoccupants
in the event of an accident or the vehicl erolling
over. Thisr educesthe ris kofvehicleoccupants
coming into contact with parts of the vehicle
interio rorbeing ejecte dfrom the vehicle. Fur-
thermore,t he seatbelth elps to keep the vehicle
Occupan tsafety41
Safety
Z

Drivingsafet ys ystems
Overview of drivin gsafet ys ystems
In this section ,you will fin dinformati on about
th ef ollowin gdrivin gsafet ysystems :
RABS(Anti-lock Brakin gSystem)
(Ypage 61)
RBA S(Brak eAssist System) (Ypage 61)
RActive Brak eAssist(Ypage 62 )
RESP®(Electronic Stability Program)
(Ypage 64)
REB D( Electroni cBrak eforce Distribution )
(Ypage 67 )
RADAPTIV EBRAKE (Ypage 68 )
RSTEERCONTROL (Ypage 68)
Important safet ynotes
If you fail to adapt your drivin gstyle or if you are
inattentive ,the drivin gsafet ysystems can nei-
ther reduce th eriskofana ccidentnor override
th el aws of physics. Driving safet ysystems are
merely aids designed to assist driving. You are
responsible fo rmaintainin gthe distanc etothe
vehicle in front, fo rvehicle speed, fo rbraking in
goo dtime, and fo rstayin ginl ane. Always adapt
your drivin gstyle to suit th eprevailin groada nd
weather condition sand maintain asafed istanc e
from th evehicle in front. Drive carefully.
The drivin gsafet ysystems described only wor k
as effectively as possible when there is ade-
quat econtac tbetween th etires and th eroad
surface. Please pay special attention to th e
note sont ires ,recommended minimum tire
tread depths, etc. (
Ypage 288).
In wintr ydrivin gconditi ons, always use winte r
tires (M+ Stires )a nd if necessary,s now chains.
Onlyint hiswaywill the driving safety systems
describe dinthissection work as effectively as
possible.
ABS (Anti-lock Brakin gSystem)
General information
ABS regulate sbrake pressure in such awaythat
the wheels do not lock when yo ubrake. This
allows yo utocontinue steering the vehicl ewhen
braking. The
! ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goe soutwhen the engine is running.
ABS works from aspeed of about5m ph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, eve nwheny ou
onlyb rake gently.
Important safety notes
iObserve the "Important safety notes "sec-
tio n(Ypage 61).
GWARNING
If ABS is faulty ,the wheels could lock when
braking .The steerability and braking charac-
teristic smaybe severely impaired.A ddition-
ally ,further driving safety systemsa re deac-
tivated.T here is an increased danger of skid-
ding and accidents.
Driv eonc arefully. Hav eABS checked imme-
diately at aquali fied specialist workshop.
Whe nABS is malfunctioning ,othe rsystems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp (
Ypage 220 )and dis-
play messages which maybes hown in the
instrument cluster (
Ypage 192).
Braking
XIf ABS intervenes: continue to depress the
brake peda lvigorously unti lthe braking sit-
uatio niso ver.
XTo make afullb rake application: depress
the brake peda lwithf ullf orce.
If ABS intervene swhenb raking ,you will fee la
pulsing in the brake pedal.
The pulsating brake peda lcan be an indication
of hazardousr oadconditions, and functions as a
reminder to take extra car ewhile driving.
BAS (Brak eAssis tSystem)
General information
BAS operates in emergency braking situations.
If yo udepress the brake peda lquickly, BAS
automaticall yboosts the braking force,t hus
shortening the stopping distance.
Driving safety systems61
Safety
Z

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

ProblemPossible causes/consequences andMSolutions
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of the
SmartKey.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function:
XUnlock (Ypage 77) or lock (Ypage 77) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at aqualified specialist
workshop.
The engine cannot be
started using the Smart-
Key.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary (Ypage 278).
or
XJump-start the vehicle (Ypage 278).
or
XConsult aqualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 73) and replace it if necessary
(Ypage 73).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from apowerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost aSmart-
Key.XHave the SmartKey deactivated at aqualified specialist workshop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
SmartKey75
Opening and closing
Z

Problems with the seat heating
ProblemPossible causes/consequences andMSolutions
The seat heating has
switched off prematurely
or cannot be switched
on.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will switch
back on automatically.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is arisk of an accident.
Adjust the driver's seat, head restraint,s teer-
ing wheel and mirror and fasten your seat belt before startin gthe engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is arisk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
Adjusting the steering wheel
GWARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is arisk of an
accident.
Before startin goff, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
:Release lever
;Adjustst he steering wheel height
=Adjuststhe steering wheel position (fore-
and-aft adjustment)
XPush release lever :down completely.
The steering column is unlocked.
XAdjust the steering wheel to the desired posi-
tion.
XPush release lever :up completely.
The steering column is locked.
XCheck if the steering column is locked. When
doing so, try to push the steering wheel up or down or try to move it in the fore-and-aft
direction.
Steering wheel95
Seats, steering wheela nd mirrors
Z

ProblemPossible causes/consequences andMSolutions
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 278).
If the engine does not start despite attempt stojump-start it:
XConsult aqualified specialist workshop.
The starter motor was exposed to athermal load that was too high.
XAllow the starter motor to cool down for approximately two minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult aqualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.There is amalfunction in the engine electronics or in amechanical
componentoft he engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at aqualified specialist work-
shop.
The coolant temperature
gauge shows avalue
above 248 ‡(120 †).
The coolant warning
lamp may also be on and
aw arning tone may
sound.The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 260). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELECTb utton (all vehicles
except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
will change:
Rthe drive (engine and transmission manage-
ment)
Rthe suspension (vehicles with damping sys-
tem or AMG adaptive sport suspension sys-
tem)
Rthe steering
Rthe availability of the ECO start/stop function
Rthe climate control:
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program Cis
activated. For further information about starting
the engine, see (
Ypage 125).
XPress DYNAMIC SELECT button :as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display.A fter five seconds the
display goes out and the status icon of the
selected drive program appears.
128DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)
Driving and parking