2018 MERCEDES-BENZ CLA COUPE Owner's Manual

Applyingautom atically
The electric parking brak eisautomatically
applie dwhen th etransmission is in position j
and :
Rthee ngineiss witched off or
Rthed river is no twearing aseat belt and th e
driver's door is opened
To preven tthe electric parking brak efromb eing
automatically applied, pull handle :.
The electric parking brak eisalso engage dauto -
matically if:
RDistanc ePilotD ISTR ONICbring sthe vehicl e
to as tandstill or
Rth eH OLDf unction is keepin gthe vehicl esta-
tionary
RParking Pilo tiskeepin gthe vehicl estationary
In addition ,atleast on eofthefollowin gcondi -
tion smustbef ulfilled :
Rthee ngineiss witched off
Rthed river is no twearing aseat belt and th e
driver's door is opened
Rthere is asystem malfunction
Rthep owe rsupply is insufficien t
Rthev ehicl eiss tationary for alengthy period
The red F(USAonly) or ! (Canada only)
indicator lamp in th einstrumen tcluste rgoes
out .
The electric parking brak eisnotautomatically
engage diftheengin eisswitched off by th eECO
start/sto pfunction .
Releasing automatically
Your vehicle's electric parking brak eisauto-
matically release difall of th efollowin gcondi -
tion sare met :
Rthee ngineisr unnin g
Rthet ransmission is in position hork and
you depress th eaccelerato rpedal or shif t
from position jtoh ork
Rthes eat belt has been fastene d
if th etransmission is in position k,thetrunk lid
mus tbec losed. If your seat belt is no
tfastened, th efollowin g
condition smustbef ulfilled to automatically
release th eelectric parking brake:
Rthed river's door is closed
Ryou are shifting from transmission position
j or hav epreviously driven at speeds
greate rtha n2m ph(3 km/ h)
Ensure thaty oudo not depress the accelerator
peda lunintentionally. Otherwise, the parking
brake will be released and the vehicl ewills tart
to move.
Emergenc ybraking
The vehicl ecan also be braked durin ganemer-
gency by using the electri cparkin gb rake.
XWhil edriving, push handle :of the electric
parkin gbrake (Ypage 142).
The vehicl eisbraked as long as yo ukeep
handle :of the electri cparkin gb rake
pressed. The longe rthe electri cparkin gbrake
handle :is depressed, the greate rthe brak-
ing force.
During braking:
Raw arning tone sounds
Rthe ReleaseP arkingBrakemessage
appears
Rthe red F(USA only) or !(Canada
only) indicator lamp in the instrument cluster flashes
When the vehicl ehasbeen braked to astand-
still ,the electri cparkin gb rake is engaged.
Parking the vehicle foral ongp eriod
If yo uleave the vehicl eparked for longe rthan
fourw eeks,the battery maybed amagedby
exhaustive discharging.
If yo uleave the vehicl eparked for longe rthans ix
weeks ,the vehicl emaysufferd amageasa
resul toflackofu se.
XVisitaq ualified specialis tworkshop and seek
advice.
iYo uc an obtai ninformatio nabout trickle
chargers fromaq ualified specialis twork-
shop.
Parking143
Driving an dparking
Z

Drivingtips
General notes
Important safet ynotes
GWARNING
If you switch of fthe ignition whil edriving,
safety-relevant function sare only available
wit hlimitations, or no tatall. Thi scould affect,
fo re xample, th epowe rsteerin gand th ebrake
boostin geffect. You will require considerably
more effort to steer and brake .There is arisk
of an accident.
Do no tswitch of fthe ignition whil edriving.
GWARNING
If you operat emobile communication equip -
men twhen driving, you may be distracted
from th etraffic situation .You could also los e
contro lofthevehicle. There is ariskofa n
accident.
Only operat ethise quipmen twhen th evehicle
is stationary.
Observ ethe lega lrequirements fo rthe country
in whic hyou are driving. Some jurisdiction spro-
hibi tthe driver from usin gamobile phone whil e
drivin gavehicle.
If you mak eacallw hiled riving, always use
hands-free mode. Only operat ethe telephon e
when th etraffic situation permits. If you are
unsure ,pull over to asafel ocation and stop
befor eoperatin gthe telephone.
Bear in min dthatatas peed of only 30 mph
(approximately 50 km/h), th evehicle cover sa
distanc eof44f t(approximately 14 m)per sec-
ond.
Drive sensibly –save fuel
Observe the following tips to save fuel:
RThe tires should always be inflated to the rec-
ommended tire pressure.
RRemove unnecessary loads.
RRemove roof racksw hen they are not needed.
RWarm up the engineatlow engin espeeds.
RAvoid frequenta cceleration or braking.
RHave all maintenanc ework carried out as
indicated by the servicei ntervals in the Main- tenance Booklet or by the servicei
nterval dis-
play.
Fuel consumption also increases when driving in cold weather, in stop-start traffic and in hilly ter-
rain.
Drinking and driving
GWARNING
Drinkin gand driving and/or takin gdrugs and
driving are very dangerous combinations.
Even asmall amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of aserious or even fatal acci-
dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Thereforen ever leave
the engin erunning in enclosed spaces with-
out sufficientv entilation.
Certain engin esystems are designed to keep
the level of poisonous component sinexhaust
fumes within legal limits.
These systems only work at peak efficiency if
they are serviced exactly in accordance with the
manufacturer's specifications .Always have
work on the engin ecarried out at aqualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
BenzC enter for this purpose. In particular, work
relevant to safety or on safety-related systems
must be carried out at aqualified specialist
workshop.
The engin esettings must not be changed under
any circumstances. Furthermore, all specific
servicew ork must be carried out at regular
intervals and in accordance with the Mercedes-
Benzs ervicer equirements. Details can be found
in the Maintenance Booklet.
144Driving tips
Driving and parking

ECO display
The ECO display showsyou how economical
your driving style is. The ECO display assists you
in achievin gthe mos teconomical driving style
for th eselecte dsettings and prevailingc ondi-
tions .Your driving style can significantly influ-
enc ethe vehicle's consumption.
:Acceleration
;Coasting
=Constant
?Additional range achieved
Range ?is shownu nderBonus
fr.Startand
represents th eadditional range achieve dsince
th eb eginnin gofthejourney as aresult of an
adapted driving style.
If th efuel leve lhas dropped int othe reserve
range, the FuelLow
message is shownint he
multifunction display instead of range ?.The
8 warning lamp in th einstrumen tcluster
also lightsup(
Ypage 224). The ECO display consistsoft
hree sections ,with
an inner and outer area. The sections corre-
spondtot hefollowingt hree categories:
:Acceleration (evaluationofthe
acceleratio nprocesses):
Rtheo uter area fills up and th einner
area lightsupg reen: moderate
acceleration, especiall yathigher
speeds
Rth eo uter area empties and the
inner area is gray: sporty acceler-
ation
;Coasting (evaluationofall decelera-
tio np rocesses):
Rtheo uter area fills up and th einner
area lightsupg reen: anticipatory
driving ,kee pingy our distanc eand
early release of th eaccelerator.
The vehicle can coas twithout use
of th ebrakes.
Rtheo uter area empties and the
inner area is gray: frequenth eavy
braking
=Constant (continuous evaluation
ove rthe entire journey):
Rtheo uter area fills up and th einner
area lightsupg reen: constant
speeda nd avoidanc eofunneces-
sary acceleratio nand deceleration
Rtheo uter area empties and the
inner area is gray: fluctuationsi n
speed
The three inner areas display th ecurren tdriving
style and light up green as aresult of aparticu-
larly economical driving style. Dependingont he
driving situation, up to two areas may light up
simultaneously.
At th ebeginnin gofthejourney, th ethree outer
areas are emptya nd fill up asaresult of eco-
nomical driving .Ahigher leve lindicates amore
economical driving style. If th ethree outer areas
are completely fille datthesame time, th edriver
has adopted th emoste conomical driving style
for th eselecte dsettings and prevailingc ondi-
tions .The ECO display border lightsu p.
The ECO display does no tindicat ethe actual fuel
consumption. The additionally achieve drange
displayed under Bonus fr. Start
does not
indicat eafixed consumptio nreduction.
Driving tips145
Driving and parking
Z

In addition to driving style, the actual consump-
tion is affected by other factors, such as:
RLoad
RTire pressure
RCold start
RChoice of route
RActive electrical consumers
These factors are not includedint he ECO dis-
play.
An economical driving style specially requires
driving at moderate engine speeds.
Achieving ahigher valu einthe categories
"Acceleration" and "Constant":
Robserve the gearshift recommendations.
Rdrive the vehicle in drive program Cor E
(vehicles with aDYNAMIC SELECT button).
On long journeys at aconstant speed,e .g. on the
highway, only the outer area for "constant" will
change.
The ECO display summarizes the driving style
from the start of the journey to its completion.
Therefore, there are more marked changes in
the outer areasatt he start ofajourney. On lon-
ger journeys, there are fewer changes. For more
marked changes, perform amanua lrest
(
Ypage 181).
For more information on the ECO display, see
(
Ypage 180).
Braking
Important safety notes
GWARNING
If you shift down on aslippery road surface in
an attempt to increase the engine's braking
effect, the drive wheelsc ould lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on aslippery road surface.
Downhill gradients
!On long and steep gradients, you must
reduce the load on the brakes by shifting to a
lowerg ear in good time. This allows you to
take advantage of engine braking. For this you
must first activate manua lgearshifting. This helps you to avoid overheating the brakes and
wearing them out excessively.
When you take advantage of engine braking, it
is possible that
adrive wheel willn ot rotate for
some time, e.g. on aslippery road surface.
This could cause damage to the drive train.
This type of damage is not covered by the
Mercedes-Benz warranty.
Briefly depressing the accelerator pedalo n
downhill gradients whilet he manualdrive pro-
gram Mis temporarilya ctivated: the automatic
transmission may switch to the last active auto-
matic drive program Eor S.T he automatic trans-
missionm ay shift to ahigherg ear. This can
reduce the engine's braking effect.
Heavy and light loads
GWARNING
If you rest you rfoot on the brake pedalw hile
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail.T here is a
risk of an accident.
Never use the brake pedalasaf ootrest. Never
depresst he brake pedala nd the accelerator
pedalatt he same time.
!Depressing the brake pedalc onstantly
results in excessive and premature weart o
the brake pads.
If the brakes have been subjected to aheavy
load,don ot stop the vehicle immediately.D rive
on for ashort while. This allows the airflow to
cool the brakes more quickly.
Wet roads
If you have driven for along time in heavy rain
withoutb raking, there may be adelayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depresst he brake pedalmore
firmly.M aintainagreater distance from the
vehicle in front.
After driving on awet road or having the vehicle
washed, brake firmly whilep aying attention to
the traffic conditions. This willw arm up the
brake discs, thereby drying them more quickly
and protecting them against corrosion.
146Driving tips
Driving and parking

Limited braking performance on salt-
treated roads
If you driveonsalted roads,alayer of salt resi-
due may for monthebraked iscsand brake
pads. This can result in asignificantly longer
braking distance.
RIn ordertop revent any salt build-up, apply the
brakes occasionally while paying attention to th et raffic conditions.
RCarefully depress th ebrakep edal and the
beginnin gand end of ajou rney.
RMaintain agreater distanc etothevehicle
ahead.
Servicing th ebrakes
!The brakef luid level may be to olow, if:
Rif th ered brakew arning lamp lightsupi n
th ei nstrumentc luster and
Ryou hearawarning tone while th eengine is
running
Observe additional warning messages in the
multifunction display.
The brakef luid level may be to olow due to
brak epad wear or leaking brak elines.
Hav ethe brakes ystem checked immediately.
Consult aqualifie dspecialist workshop to
arrange this.
!Af unction or performanc etests hould only
be carried out on a2-axle dynamometer. If
you wish to operate th evehicle on such a
dynamometer, please consult aqualifie dspe-
cialis tworkshop in advance. You could oth-
erwis edamage th edrivet rain or th ebrake
system.
!As th eESP®system operates automatically,
th ee ngine and th eignitio nmust be switched
off (th eSmartKey must be in position uor
1 in th eignitio nlock), if th eelectric parking
brakeist ested onabraking dynamometer
(maximum 10 seconds).
Brakin gtriggered automatically by ESP
®may
cause severe damage to th ebrakes ystem.
All check sand maintenanc ework on th ebrake
system must be carried out at aqualifie dspe-
cialis tworkshop.
Hav ebrakep ads installe dand brakef luid
replaced at aqualifie dspecialist workshop. If th
ebrakes ystem has onl ybeen subject to
moderatel oads, you should tes tthe functional-
ity of your brakes at regular intervals.
You can fin dadescription of Brake Assist (BAS
)
on (Ypage 61).
Mercedes-Ben zrecommend stha tyou onl yhave
brak epads/linings installe donyour vehicle
whichh ave been approved for Mercedes-Benz
vehicle sorwhichcorrespondtoane quivalent
qualitys tandard. Brake pads/linings whichh ave
not been approved for Mercedes-Ben zvehicles
or whicha re not of an equivalent qualityc ould
affect your vehicle's operatin gsafety.
Mercedes-Ben zrecommend sthaty ou onl yuse
brakef luid that has been specially approved for
your vehicle by Mercedes-Benz, or whichc orre-
sponds to an equivalent qualitys tandard. Brake
fluid whichh as not been approved for
Mercedes-Ben zvehicle sorw hichisn ot of an
equivalent qualityc ould affect your vehicle's
operatin gsafety.
Checkingb rake lining thickness
You can measure th ebreak pad/linin gthick-
nes susingat estg age. Color-coding( green or
red) on th etestg age allows you to determine
whether th ebrakep ad/linin gthicknes sisstill
sufficient .The tes tgage is in th evehicle docu-
mentw allet in th egloveb ox.
Front wheel
Driving tips147
Driving and parking
Z

Rear wheel
XBring thevehicl eand wheels int oasuitable
position so that you can attach test gage A.
XSecurethe vehicl eagainst rollin gaway
(Ypage 141).
XEngage park position P.
XSwitchoff th eengine.
XPlac etestg age Abetween th ewheel's
spoke sonb rakepad/lining =.
XHold test gage Averticall yonb rak edisc :
and slid emeasurin gpin; onto brak e
disc :.
XChec kwhichc olor field ?thea rrow on
measurin gpin; is pointing to .
Green: theb rak epad/lining thickness is suf -
ficient.
Red :th eb rak epad/lining thickness is no t
sufficient. Hav ethe brak epads/lining
checke dataq ualified specialist workshop.
To avoi daninaccurat emeasurement:
Rmak esurey ou position th ewheels suitably
Rdo no tput th emeasurin gpin on arecess in
th eb rak edisc
Driving on wet roads
Hydroplaning
If water has accumulated to acertai ndept hon
th er oad surface, there is adanger of hydro-
planing occurring, eve nif:
Ryou driv eatlow speeds
Rthet ires hav eadequat etread dept h
Fo rthisr eason ,intheevent of heav yrain or in
condition sinwhichh ydroplaning may occur ,
you mus tdriveint hefollowin gmanner:
Rlower your spee d
Ravoidruts
Ravoi dsudde nsteering movement s
Rbrakecarefully
Driving on flooded roads
!Do no tdrivet hroug hflooded areas .Chec k
th ed ept hofa ny water before driving throug h
it .D rive slowly throug hstanding water. Oth-
erwise, water may ente rthe vehicl einterior or
th ee nginec om partment. This can damag e
th ee lectronic component sintheengin eor
th ea utomatic transmission .Water can also
be drawn in by th eengine's air suction nozzles
and this can caus eengined amage.
Winter driving
GWARNIN G
If you shif tdown on aslipper yroad surfac ein
an attemp ttoincreas ethe engine's braking
effect, th edrivew heels could lose their grip.
There is an increased danger of skiddin gand
accidents .
Do no tshif td own for additional engin ebrak -
ing on aslipper yroad surface.
GDANGER
If th eexhaust pipe is blocke doradequat e
ventilation is no tpossible, poisonous gase s
suc hasc arbon monoxide (CO) may ente rthe
vehicle. This is th ecase, e.g. if th evehicl e
become strapped in snow. There is arisko f
fatal injury.
148Driving tips
Driving and parking

If you leave the engine or the auxiliary heatingrunning, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a
window on the side of the vehicle that is not
facing into the wind.
Have you rvehicle winter-proofed at aqualified
specialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur-
faces. Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise control or Distance PilotD ISTRONIC.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
XShift the transmission to position N.
XTry to bring the vehicle under control using
corrective steering.
The outsidet emperature indicator is not
designed to serve as an ice-warning device and is therefore unsuitable for that purpose.
Changes in the outsidet emperature are dis-
played after ashort delay.
Indicated temperature sjust above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in
woodeda reasoronb ridges.
You shoul dpay speciala ttention to road condi-
tions when temperature sare around freezing
point.
For more information on driving with snow
chains, see (
Ypage 290).
For more information on driving with summer
tires, see (
Ypage 289).
Observe the notes in the "Winter operation" sec-
tion (
Ypage 289).
Drivin gsystems
Cruise control
General notes
Cruise control maintains aconstant road speed
for you .Itbrakes automatically in order to avoid
exceeding the set speed.Onl ong and steep
downhill gradients, especially if the vehicle is
laden, you must select alow gear in good time.
You need to shift manually using the steering
wheel paddle shifters beforehand. By doing so,
you willm ake use of the braking effect of the engine. This relieves the load on the brake sys-
tem and prevents the brakes from overheating
and wearing too quickly.
When the engine is running, you can use the
cruise control lever to limitt
he speed to any
speed between20m ph (30 km/h)and the tech-
nicallyp ermitted maximum speed of the vehicle.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain asteady
speed for aprolongedp eriod.
The speed indicated in the speedometer may
differ slightly from the speed stored.
Important safety notes
If you fail to adapt you rdriving style, cruise con-
trol can neither reduce the risk of an accident
nor override the lawsofp hysics. Cruise control
cannot take into account the road, traffic and
weather conditions. Cruise control is only an
aid.Y ou are responsible for the distance to the
vehicle in front, for vehicle speed,f or braking in
good time and for staying in you rlane.
Do not use cruise control:
Rin road and traffic conditions which do not
allow you to maintain aconstant speed,e .g. in
heavy traffic or on winding roads
Ron slippery road surfaces .Braking or accel-
erating could cause the drive wheelstol ose
traction and the vehicle could then skid
Rin poor visibility, e.g. due to fog, heavy rain or
snow
If there is achange of drivers, advise the new
driver of the speed stored.
Cruise control lever
:Activates or increases speed
;Activates or reduces speed
Driving systems149
Driving and parking
Z

=Deactivatescruis econtrol
?Activate satthe current speed/las tstored
speed
When yo uactivate cruis econtrol, the stored
spee diss hown in the multifunctio ndisplay for
fiv es econds.
Activatio nconditions
To activate cruis econtrol, al lofthe following
activatio nconditions must be fulfilled:
Rthe electri cparkin gb rake must be released.
RESP®must be active, bu tnot intervening.
Rthe transmission must be in position h.
Storing, maintainingand callin gupa
speed
Storin gand maintainin gthe current
speed
Yo uc an stor ethe current spee difyouared riv-
ing faster than20m ph (30 km/h).
XAccelerate the vehicl etothe desired speed.
XBrieflypress the cruis econtro llev er up :or
down ;.
XRemov eyourfoo tfromt he accelerator pedal.
Cruise contro lisactivated .The vehicl eauto-
maticall ymaintains the stored speed.
iCruise contro lmaybe unabl etomaintain
the stored spee donuphillgradients .The
stored spee disresumed when the gradient
evens out. Cruise contro lmaintains the
stored spee dondownhil lgradients by auto-
maticall yapplyin gthe brakes.
Storin gthe curren tspeed or callin gupthe
las tstored speed
GWARNING
If yo ucallupt he stored spee dand it differs
fromt he current speed, the vehicl eacceler-
ate sord ecelerates. If yo udonot know the
stored speed, the vehicl ecould accelerate or
brake unexpectedly .There is ariskofana cci-
dent.
Pa ya ttentio ntothe roa dand trafficc ondi-
tions beforec alling up the stored speed. If you
do not know the stored speed, stor ethe
desired spee dagain .
XBriefl ypullt he cruis econtro llev er towards
you ?.
XRemov eyourfoo tfromt he accelerator pedal.
The first time cruis econtro lisactivated ,it
stores the current spee dorregulate sthe
spee doft he vehicl etothe previously stored
speed.
Settin gaspeed
Keepinm indt hatitm aytake abrief moment
unti lthe vehicl ehasaccelerated or braked to
the spee dset.
XTo adjustt he setspeed in 5mph incre-
ments (10k m/h increments): briefly press
the cruise control lever up :past the pres-
sure point for ahigher speed, or down ;for
al ower speed.
XTo adjust the set speed in 1mphincre-
ments (1 km/h increments): briefly press
the cruise control lever up :to the pressure
point for ahigher speed, or down ;for a
lower speed.
iCruise control is not deactivated if you
depress the accelerator pedal. For example, if
you accelerateb riefly to overtake, cruise con-
trol adjusts the vehicle's speed to the last
speed stored after you have finished overtak-
ing.
Deactivating cruise control
There are several ways to deactivate cruise con-
trol:
XBriefly press the cruise control lever forwards
=.
or
XBrake.
Cruise control is automatically deactivated if:
Rthe vehicle is secured with the electric park-
ing brake
Ryou are driving at less than 20 mph (3 0km/ h)
RESP®intervenes or yo udeactivate ESP®
Ryous hift the transmission to position i
whil edriving
If cruis econtro lisdeactivated ,you will hear a
warning tone.Y ouwill see the Cruise Con‐
trolOffmessage in the multifunctio ndisplay
for approximately fiv eseconds.
150Driving system s
Driving an dparking