2020 MERCEDES-BENZ SLC light

starts
automatically andthebraking effectof
the HOLD function isdeactivated.
Automatic enginestart The
engine startsautomatically if:
R you switch offthe ECO start/st opfunction
by pressing theECO button
R you release thebrake pedalintransmission
position 005Bor005C and theHOLD function is
not active
R you depress theaccelerator pedal
R you engage reverse gear005E
R you move thetransmission outofposition
005D
R you switch todrive program S+
R you unfasten yourseatbeltoropen thedriv-
er's door
R the vehicle startstoroll
R the brake system requires this
R the temperature inthe vehicle interior devi-
ates from thesetrange
R the system detects moisture onthe wind-
shield whentheair-conditioning systemis
switched on
R the battery's condition ofcharge istoo low Shifting
thetransmission toposition 005Ddoes
not start theengine.
Deac tivating oractivating theECO
start /stop function X
To deactivate: pressECObutton 0043.
Indicator lamp0044goes out.
X To activate: pressECObutton 0043.
Indicator lamp0044lights up.
If indicator lamp0044isoff, theECO start/st op
function hasbeen deactivated manuallyoras
the result ofam alfunction. Theengine will
then notbeswitched offautomaticall ywhen
the vehicle stops. 122
DrivingDriving
andparking

Problems
withtheengine Problem
Possible
causes/co nsequences and0050 0050
Solutions The
engine doesnot
start. The
HOLD functionorAct ive Distanc eAssist DISTRONIC isactiva-
ted.
X Deactivat ethe HOLD function(Ypage 152)orAct ive Distanc e
Assist DISTRONIC (Ypage 150).
X Try tostart theengine again. The
engine doesnot
start. Thestarter motor
can beheard. R
There isam alfunction inthe engine electron ics.
R There isam alfunction inthe fuel supply .
Before attempt ingtostart theengine again:
X Turn theSmartK eyback toposition 0092inthe ignition lock.
or X Press theStart /Stopbutton repeatedly untilallindicator lampsin
the instrumen tcluster goout.
X Try tostart theengine again(Ypage 119). Avoid excessively long
and frequent attemptstos tart theengine asthese willdrain the
battery.
If the engine doesnotstart after several attempt s:
X Consult aquali fied specialist workshop. The
engine doesnot
start. Youcannot hear
the starter motor. The
on-board voltageistoo low because thebattery istoo weak or
discharged.
X Jump-start thevehicle (Ypage 261).
If the engine doesnotstart despite attemptstoj ump-st artit:
X Consult aquali fied specialist workshop. The
starter motorwasexposed toathermal loadthatwastoohigh.
X Allow thestarter motortocool down forapproximately two
minutes.
X Try tostart theengine again.
If the engine stilldoes notstart:
X Consult aquali fied specialist workshop. The
engine isnot run-
ning smoothly andis
misfiring. There
isam alfunction inthe engine electron icsorinam echanical
componen tofthe engine management system.
X Only depress theaccelerator pedalslightly.
Otherwise, non-combusted fuelmay getinto thecatalytic con-
verter anddamage it.
X Have thecause rectified immediately ataq uali fied specialist
workshop. Driving
123Drivingandparking Z

lamp
mayalsolight up.Am essage appears
in the multif unction display (Ypage 198). For
further informat iononwarnin gand indi-
cat orlamps inthe instrumen tclust er,see
(Y page 214). Problem
swithfuel andthef uel tank Problem
Possible
causes/consequ encesand0050 0050
Solut ions Fuel
isleakin gfromt he
vehic le. The
fuel lineorthe fuel tankisf aulty.
G WARN
ING
Risk ofexplo sionorfire.
X Turn theSmar tKey immed iatelytoposit ion0092inthe ignit ionlock
(Y page 118)andremo veit.
X Do not restartthe engin eunder anycircumst ances.
X Consult aqualified specialist workshop. The
fuel filler flapcan-
not beopen ed. The
fuel filler flapisnot unloc ked.
X Unlo ckthe vehic le(Y page 66). The
Smar tKey batt eryisdisch arged ornear lydisch arged.
X Unlo ckthe vehic leusing themec hanic alkey (Ypage 68). The
fuel filler flapisunloc ked,buttheopen ingmec hanis misjam-
med.
X Consult aqualified specialist workshop. Par
king Imp
ortant safet ynotes G
WARN
ING
Flamm ablemate rialsuch asleaves, grassor
twigs mayigniteifthe yc om eintoc ontac t
with hotpart softhe exhaus tsyst em or
exhaus tgas flow. There isar isk offire.
Park thevehic leso that noflamm ablemate -
rials comeintoc ontac twith part softhe
vehic lewhich arehot.Take particular care
not topark ondry grasslan dorharve sted
grain fields. G
WARN
ING
If you leave childrenunsuper visedinthe
vehic le,the ycould setitin mot ionby,for
exam ple:
R release thepark ingbrak e.
R shift theautom atictransm ission outof
the park ingposit ionP.
R star tthe engin e.
In addition ,the ym ayoperat evehic leequip-
men tand becom etrapped. Thereisar isk of
an acc ident andinjury.
When leavingthe vehic le,always takethe
Smar tKey with youand lock thevehic le.
Never leavechildrenunsuper visedinthe
vehic le.
! Always
securethe vehic lecor rectlyagainst
rollin gaway. Otherwise, thevehic leor its
drive train could bedamaged. 134
Par
kingDriving andparking

App
lyingorreleas ing manua lly X
To apply :push handle0043.
When thee lectric park ingbrak eisa pplie d,
th er ed 0049 (USAonly) or 0024 (Canada
on ly) ind icat orlamp lightsup inthei nstru-
men tclus ter.
The electric park ingbrak ecan also be
applie dwhen theS martKey isrem oved.
X To releas e:pull handle0043.
The red0049 (USAonly) or 0024 (Canada
on ly) ind icat orlamp inthei nstrumen tclus -
te rg oeso ut.
The electric park ingbrak ecan onlybe
rel ease d:
R when theS martKey isin pos ition 0047inthe
ign ition lock(Ypage 118)or
R ifth ei gn ition was switched on usin gthe
St art /S topb utto n
App lyingautom atical ly The
electric park ingbrak eisa uto mat ically
applie dwhen thet rans mis sion isin pos ition
005D and :
R thee nginei ss wit ched off or
R thed river isno tw ear ing aseat belt andthe
dri ver 'sdoor isopen ed
To pre ven tthe elec tric park ingbrak efrom
bein gauto mat icallyapplie d,pull handle0043.
The electric park ingbrak eisa lso applie dauto -
mat icallyif:
R Ac tive Distanc eAssistD ISTR ONI Cbring s
th ev ehiclet oas tand still or
R theH OLDf unction iske epin gthe veh icle
st ati onary In
addit ion,atleast oneo fthe followin gcondi-
ti on sm ustb efulfilled :
R thee nginei ss wit ched off
R thed river isno tw ear ing aseat belt andthe
dri ver 'sdoor isopen ed
R there isas yst em malf unction
R thep owe rsupp lyisins ufficien t
R thev ehiclei ss tation ary foralen gthy per iod
The red0049 (USAonly) or 0024 (Canada
on ly) ind icat orlamp inthei nstrumen tclus ter
ligh tsup.
The electric park ingbrak eisn otauto matically
applie difthe engin eiss wit ched off bythe
ECO start /stopf unction .
Rel eas ing autom atical ly The
electric park ingbrak eisr elease dauto -
mat icallywhen allofthef ollowin gcondition s
are fulfilled :
R thee nginei sr unnin g
R The seat belttong ue isen gage dint he belt
buc kle
R thet rans mis sion isin pos ition 005Bor005E and
you depr essthea cceler atorpedal orshif t
fr om position 005Dto005B or005E
R ifth et rans mis sion isin pos ition 005E,t he
tr unk lidmus tbec losed
If th es eat belt tong ue isno te ngage dint he
seat beltbuckle, thef ollowin gcondition sm ust
be fulf illed :
R thed river 'sdoor isclo sed
R you mov ethe trans mis sion outofpos ition
005D oryou haveprevio usly driven atas pee d
abov e2m ph(3km /h)
R ifth et rans mis sion isin pos ition 005E,t he
tr unk lidmus tbec losed
When thee lectric park ingbrak eisr elease d,
th e0024 indicat orlamp goesoutinthei nstru-
men tclus ter.
Eme rgency brak ing The
vehiclec an also bebrak edduri ngan
eme rgencyb yusingthe elec tric park ingbrak e.
X Whil edrivin g,push handle0043ofthee lectric
park ingbrak e.
The vehiclei sb rak edfor aslon gasthe han -
dle ofthee lectric park ingbrak eisp resse d.
The longer thee lectric park ingbrak ehandle
is depr essed, theg reate rthe brak ingforce. 136
Pa
rkingDriv ingand parki ng

Do
not drink ortake drugsand drive orallo w
any one todrive whoh asbeen drinking or
taki ngdru gs.
Emi ssionc ontro l G
DA
NGE R
Co mbu stion eng inesemitp oiso no us
exh aust gases such ascar bonm onoxide.
Inha ling the seexh aust gases isha zar dous to
he alth and canresulti np oiso ning. Thereisa
ris ko ffatal inju ry.T he ref ore ,neve rlea ve the
eng inerunning anencl osedspace withou t
ad eq uate venti latio n.
Ce rta ineng inesystem saredesigne dtok eep
the level ofpoisono uscomp onents inexh aust
fu mes withi nlegallimits .
The sesystem sonlyw orka tpeake ffici ency if
the yareser viced exa ctly inacc ordance with
the manuf actu rer'ssp eci ficati ons. Alwaysh ave
wo rkon the enginecarriedo utataq ualifi ed
sp eci alistw orksh op.M erced es-Benz recom-
mend sthaty ou usea na uthor izedM erced es-
Benz Center forthisp urpo se. Inpartic ular ,
wo rkreleva ntto safety oron safety -related
sy stem smustb ec arrie do utataq ualifi ed spe-
cia list wo rksh op.
The enginesetti ngsmustnot becha nge d
und erany circum stances .Furthe rmo re,all
sp eci fic ser vicew orkm ustb ec arrie do utat
reg ular inte rvalsand inacc ordance with the
Me rced es-Benz servicerequirem ents .Deta ils
can befou ndinthe Mainte nance Booklet. EC
Od isplay
The ECO disp lays hows youh ow eco nomi cal
yo ur drivin gs tyle is.T he ECO disp laya ssists
yo ui na chievin gthe mos teconomi caldrivin g
sty lefor the selecte dsetti ngs and prevailing
cond itions. Your drivin gs tyle can signi ficantl y
infl uence thevehicle's cons umption. 0043
Accel eration
0044 Coasting
0087 Consta nt
0085 Add itiona lran ge ach ieved
Ra nge 0085issho wnund erBon usfr. Start Bon
usfr. Start
and represents theadditio nal range achieved
si nce thebeginning ofthe journey asaresult
of an adapted drivin gs tyle.
If the fuel level hasd ropp ed into thereserve
ra nge ,the Fue lLow Fue
lLowmes sage issho wninthe
mu ltifu nctio ndispl ay instea dofran ge 0085.T he
00B6 warning lamp inthe instrument cluster
al so lights up(Ypage 214 ). 13
8 Dr
ivi ng tipsDrivi ng andp arki ng

The
ECO display consistsofthree section s,
with aninner andouter area.Thesection scor-
respond tothe following threecategories: 0043
Acce
leration (evaluation ofall
acceleration processes):
R the outer areafillsupand the
inner arealights upgreen: moder-
ate acceleration ,especially at
higher speeds
R the outer areaempties andthe
inner areaisgray: sporty acceler-
ation 0044
Coasting
(evaluation ofall deceler-
ation processes):
R the outer areafillsupand the
inner arealights upgreen: antici-
patory driving, keeping yourdis-
tanc eand early release ofthe
accelerator. Thevehicle can
coast without useofthe brakes.
R the outer areaempties andthe
inner areaisgray: frequent heavy
braking 0087
Constant
(continuous evaluation
over theentir ejourney):
R the outer areafillsupand the
inner arealights upgreen: con-
stant speed andavoidance of
unnecessary accelerationand
deceleration
R the outer areaempties andthe
inner areaisgray: fluctuations in
speed The
three innerareas display thecurrent driv-
ing style andlight upgreen asaresult ofap ar-
ticularly economicaldriving style.Dependin g
on the driving situation, uptotwo areas may
light upsimultaneously.
At the beginning ofthe journey, thethree
outer areas areempty andfillup asaresult of
econom icaldriving. Ahigher levelindicates a
more econom icaldriving style.Ifthe three
outer areas arecompletely filledatthe same
time, thedriver hasadopted themost eco-
nomical drivingstyleforthe selected settings
and prevailing conditions.TheECO display
border lightsup.
The ECO display doesnotindicate theactual
fuel consumpt ion.Theadditionally achieved range
display edunder Bonus fr.start Bonus
fr.start does
not indicate afixed consumpt ionreduction .
In addition todriving style,theactual con-
sumption isaffect edbyother factors,such as:
R load
R tire pressure
R cold start
R choice ofroute
R active electric alconsumer s
These factorsarenot included inthe ECO dis-
play.
An econom icaldriving stylespecially requires
driving atmoderate enginespeeds.
Achievin gahigher value inthe categories
"Accelerat ion"and"Constant ":
R observe thegearshift recommendations .
R drive thevehicle indrive program Cor E.
In urban trafficand stop- start traffic,drive pro-
gram Cis recomm ended.
On long journeys atac onst antspeed, e.g.on
the highway, onlytheouter areafor"const ant"
will change.
The ECO display summarizes thedriving style
from thestart ofthe journey toits completion .
Therefore, therearemore marked changes in
the outer areas atthe start ofajourney. On
longer journeys, therearefewer changes. For
more marked changes, performamanual rest
(Y page 172).
Further informationonthe ECO display
(Y page 171). Br
aking
Import antsafety notes G
WARNIN
G
If you shift down onaslippery roadsurface
in an attempt toincrease theengine's brak-
ing effect ,the drive wheels couldlosetheir
grip. There isan increased dangerofskid-
ding andaccident s.
Do not shift down foradditional enginebrak-
ing onaslippery roadsurface. Driving
tips
139Driving andparking Z

Downh
illgrad ient s !
On
long,steep gradie nts, you mus tred uce
th el oad ontheb rake s.To use engin eb rak-
in g, shi ftto alowe rgear ingoo dtime. Thi s
hel psyou toavo idoverh eatingt he bra kes
and wear ingt hemo utexce ssi vel y.
Whe nmakingu seofthee ngineb raking
ef fect ,iti sp ossib lethat ad rive whee lmay
no tturnf or som etime,e.g. inthec aseo f
sudd enlych ang ingo rslipper yroads urfac e
co nd ition s.Thi scouldcau sedam agetothe
dri ve train .Thist ypeo fdam age isno tc ov-
ere dbythe Mer cedes -Ben zw arrant y.
Chan geinto alowe rgear ingoo dtimeo nlon g
and steep down hillgradie nts. Thi sise spec ially
imp ortant ifth ev ehicle islade n.
Thi salso appli esifyou haveactivat edcruise
co ntro lo rA ctiveD istan ceAssis tD ISTR ON IC.
Hea vyandligh tloa ds G
WAR
NING
If you restyour foot on theb rake peda l
whil edrivin g,theb raking sys temc anover-
heat .Thisi nc rea sest he stopp ingd ista nc e
and canevencause theb raking sys temt o
fail .The re isar isko fana cciden t.
Nev eruse theb rake peda lasaf ootre st.
Nev erdepr esstheb rake peda land the
acc eler ator peda latthe sam etime.
! De
pre ssing theb rake peda lcon stan tly
res ultsine xces sive and premat ure wear to
th eb rake pads .
If th eb rake sh aveb eens ubj ectedt oa heav y
load ,don otstop thev ehicle imm ediately, but
dri ve on foras hortwhil e.Thi sallow sthe air-
flo wt ocoolthe bra kesm oreq uickly.
Wet road s If
you havedriven foral ongt imeinh eav yrain
wit hout braking ,the re may beadelayed reac-
ti on from theb rake sw hen braking fort he first
ti me. Thism ayalso occur afterthev ehicle has
bee nwash edordriven thro ugh deepwater.
You then hav etod epr ess theb rake peda l
mo refirmly. Main tain ag reater dis tanc ef rom
th ev ehicle in fron t.
Af terd rivin go naw etroad orhav ingt he veh i-
cl ew ash ed, brakefirmly whilepayin gattenti on to
thet raffic co nd ition s.Thi sw illwarm upthe
bra kediscs,the reby dryi ngthem morequic kly
and protectingt hema gain stcorrosi on.
Lim ited brak ing performa nce onsalt-
tr eat edroad s If
you drive on salt edroads, alayer ofsalt resi-
due may form ontheb rake discsand brake
pads .Thisc an res ult inas igni fic ant lylon ger
bra king distanc e.
R In order topre ven tany salt build -up,apply
th eb rake so ccasion ally whilepayin gatten-
ti on tothet raffic co nd ition s.
R Care fullydepr ess theb rake peda land the
beg inning and endo faj ourney.
R Main tain ag reater dis tanc et ot he veh icle
ahea d.
Ser vici ngtheb rake s !
The
brakeflui dlevel may betool ow, if:
R ifth er ed bra kewarn ingl amp lightsup in
th ei nstru ment clust erand
R you hear awarningt onew hilet he engin e
is run ning
Obs erveaddit ionalwarn ingm essag esinthe
mult ifunction display.
The brakeflui dlevel may betool ow due to
bra kepad wear orleak ingb rake lines.
Hav ethe bra kesys temc hecked imm edi-
at ely. Consult aqualif iedspecialis twork-
sho ptoa rrang ethis.
! As
theE SP®
sys temo perat es aut omati-
cal ly,thee nginea nd thei gn ition mus tbe
swit ched off( theS martKey mustbeinp osi-
ti on 0092 or0047 inthei gn ition lock),ift he
elec tric par king bra keistested on abraking
dyn amo meter(ma ximum 10sec onds).
Br ak ingt rigg ere dautom atically byESP®
may causesev ere dam agetotheb rake sys -
te m.
Al lc he cksa nd main tenan cewor konthe bra ke
sys temm ustb ec arrie do utataq ualif iedspe-
ci alis tworks hop .
Hav ebrake pads inst alled andbrakeflui d
rep laced ataq ualif iedspecialis tworks hop .
If th eb rake sys temh asonlybee nsubj ectto
mo der atel oad s,you should test thef unction -
alit yofyour brakesa treg ular inte rvals.
In fo rm ation onBAS(Brak eA ssist) (Y page 57). 140
Dri
ving tipsDri ving andp ark ing

When
youactivat ecruise control,the stored
speed isshown inthe multifunc tiondisplay for
five secon ds.The speed isthen permanen tly
displayed inthe status indicator togetherwith
the 00B2 symbol.
In vehicles withasegment circleinthe speed-
ometer ,the segment sbetween thecurren tly
stored speedandtheend ofthe segment cir-
cle light up.
Storing, maintaining andcalling upa
speed Storing
andmaint aining aspeed
X Acc elerate thevehicle tothe desired speed.
X Briefly pressthecruise controllever up0043
or down 0085.
X Remove yourfootfrom theaccelerat or
pedal.
Cruise controlisactivat ed.The vehicle auto-
matically maintainsthe stored speed.
You canstore thecurren tspeed ifyou are
driving fasterthan20mph (30km/ h).
i Cruise
controlmay beunable tomaintain
the stored speedonuphill gradients .The
stored speedisresumed whenthegradient
evens out.Cruise controlmaintain sthe
stored speedondownhill gradients byauto-
matically applyingthebrakes.
Storing orcalling upaspeed G
WARNIN
G
If you callupthe stored speedanditdiffers
from thecurren tspeed, thevehicle acceler-
ates ordecelerates. Ifyou donot know the
stored speed, thevehicle couldaccelerat e
or brake unexpec tedly.There isar isk ofan
accident .
Pay atten tiontothe road andtrafficcondi-
tions before callingupthe stored speed. If
you donot know the stored speed, storethe
desired speedagain.
X Briefly pullthecruise controllever towards
you 0087.
X Remove yourfootfrom theaccelerat or
pedal.
The first time cruise controlisactivat ed,it
stores thecurren tspeed orregulates the speed
ofthe vehicle tothe previously stored
speed.
Setting aspeed G
WARNIN
G
Keep inmind thatitmay take abrief
momen tuntil the vehicle hasmade thenec-
essary adjustmen ts.
Inc rease ordecrease thesetvehicle speed
to av alue thattheprevailing roadcondit ions
and legal speed limitspermit. Otherwise,
sudden andunexpec tedaccelerat ionor
deceleration ofthe vehicle couldcause an
accident and/orserious injurytoyou and
others .
X To
adj ust the setspeed in1m phincre-
ments (1km/h increments): brieflypress
the cruise controllever up0043 tothe pres-
sure point forahigher speed, ordown 0085
for alower speed.
Ever ytime thecruise controllever is
pressed upordown, thelast speed stored is
incr eased orreduced.
X To
adj ust the setspeed in5m phincre-
ments (10km/h increments): briefly
press thecruise controllever up0043 past the
pressure pointforahigher speed, or
down 0085for alower speed.
Ever ytime thecruise controllever is
pressed upordown, thelast speed stored is
incr eased orreduced.
i The
speed indicated inthe speedometer
may differ slightly fromthespeed stored.
i Cruise
controlisnot deactivat edifyou
depress theaccelerat orpedal. Forexample,
if you accelerat ebriefly toovert ake,cruise
cont roladjusts thevehicle's speedtothe
last speed stored afteryouhave finished
overt aking. Driving
systems
143Driving andparking Z