2020 MERCEDES-BENZ SLC start stop button

ECO
star t/s top functi on Dur
ing auto maticeng ineswit ch-off,t he cli-
mat econtrol syst emonlyoper atesata
reduc edcapac ity.Ifyou requi refull clim ate
con trol capac ity,theE CO start /stopf unction
can bedeac tivate dbypres singthe ECO but-
to n( Ypage 122). Oper
ating thec lim atec ont rolsys-
tem s Activ
ating/d eactivatingc lim atec on-
tr ol
Gener alnot es When
thec lim ate control isswit ched off,the
air supply andaircirculat ionare also switched
off .The wind owscouldfog up. Ther efore,
swit choff clim atecontrol on lybrie fly
i Ac
tivate clim atecontrol prim arily usingthe
0058 button( Ypage 111).
Air- condi tioningsyst em X
Turn theS martKey toposit ion0048inthei gn i-
tio nlock( Ypage 118).
X To swit chon: turna irflow control 006B clock-
wise tothed esir edposit ion(excep tposit ion
0 )( Ypage 106).
X To swit choff:tur na irflow control 006B coun -
te r-clo ckwise toposit ion0(Y page 106).
3-z one autom atic clim atec ont rol X
Turn theS martKey toposit ion0048inthei gn i-
tio nlock( Ypage 118).
X To swit chon: pres sthe 0058 button.
The indicat orlamp inthe0058 buttonlight s
up. Airflow andairdist ribut ionare setto
auto maticmod e.
or
X Pre ssthe0078 button.
The indicat orlamp inthe0078 buttongoes
out .The prev iously selecteds ettin gs are
res tored.
X To swit choff:pres sthe 0078 button.
The indicat orlamp inthe0078 buttonlight s
up. Swit
ching cooling withairdeh umidi-
fica tion on/off
Gener alnot es If
you deac tivate the" Coolin gwithair- dehu-
midif ication"fun ction ,the air inside thev ehicle
will notb ec ooled. Theairinside thev ehicle
will also notb ed ehum idified. The wind owscan
fog upmor equick ly.Ther efore, deac tivate the
coo ling with air-dehum idification function only
brie fly.
The "Coolin gwithairdehum idification"fun c-
tio niso nlya vailabl ewhen thee ngine isrun -
nin g.The airinside thev ehicle iscoo ledand
dehum idifiedacc ording tothet em per atur e
selec ted.
Con densation may dripfrom theu nde rsideof
th ev ehicle when itis in coo ling mod e.This is
no rm aland notas ignthat there isam alfunc -
tio n.
Activ ating/d eactivating X
To act ivate: pres sthe 005A or0056 but-
to n.
The indicat orlamp inthe005A or0056 but-
to nl ight sup.
X To dea ctiv ate: pres sthe 005A or0056 but-
to n.
The indicat orlamp inthe005A or0056 but-
to ng oes out.The "Coolin gwithairdehum id-
ific atio n"fun ction has adelayed switch-off
feat ure. 110
Oper
ating thec lima tecontr olsyst emsClima tecontr ol

In
vehicle swithautoma tictransmission,
engage positionsPa nd Ro nly when the
vehicle isstationary .
Where possible,avoid spinning thedrive
wheel swhen pulling awayonslippery roads.
You could otherwise damagethe drive train. Key
positio ns
Smart Key 005A
Toremove theSmartKey
0047 Power supplyfor some consumers, such
as the windshi eldwipers
0048 Ignition (powersupp lyfor allconsumers)
and drive positio n
0049 Tostart theengine
i The
SmartKey canbeturned inthe ignition
lock even ifit is not thecorrect SmartKey
for the vehicle .The ignition isnot switched
on. The engine cannot bestarted.
KEY LESS-GO Gene
ralnotes
Vehicle swithKEYLESS- GOare equi pped with
aS martKey featuringanintegrated KEYLESS-
GO start function andadetachab leStart/St op
button.
The Start/St opbutton mustbeinserted inthe
ignition lockandtheSmartKey mustbeinthe
vehicle .
When youinsert theStart/St opbutton into
the ignition lock,thesystem needsapprox-
imatel ytwo seconds recognition time.Youcan
then usetheStart/St opbutton.
Pressing theStart/St opbutton several times
in successio ncorresponds tothe different keypositio
nsinthe ignition lock.Thisisonly the
case ifyou arenot depres singthebrake pedal.
If you depres sthe brake pedaland press the
Start/St opbutton, theengine startsimmedi -
ately .
Ac heck which periodicallyestabl ishes aradi o
connection betweenthe vehicle andthe
SmartKey determines whetheravalidS mart-
Key isin the vehicle .This occurs, forexample ,
when starting theengine.
To start thevehicle withoutactively usingthe
SmartKey:
R the Start/St opbutton mustbeinserted in
the ignition lock.
R the SmartKey mustbeinthe vehicle .
R the vehicle mustnotbelocked withthe
SmartKey orKEYLESS- GO(Ypage 66).
Do not keep theSmartKey:
R with electronic devices,e.g.amobilephone
or another SmartKey.
R with metall icobjects, e.g.coins ormetal
foil.
R inside metallicobjects, e.g.ametal case.
This canimpa irthe functionality ofthe KEY-
LESS- GOkey.
If you lock thevehicle withtheSmartKey's
remote controlorwith KEYLESS- GO,after a
short time:
R you willnot be abletos witch onthe ignition
with theStart/St opbutton.
R you willnot be abletos tart theengine with
the Start/St opbutton untilthevehicle is
unlocked again.
The engine canbeswitched offwhil ethe vehi-
cle isin motion bypressing andholdi ngthe
Start/St opbutton forthree seconds. This
function operatesindepe ndently ofthe ECO
start/stop automaticengine switch-off func-
tion. 118
Drivi
ngDrivi ngand parking

G
WARNING
After ashort time, hillstart assistwil lnol on-
ger brake yourvehicl eand itcoul droll awa y.
There isar isk ofan accide ntand injury .
There fore,quickly move yourfoot from the
brake pedaltot he accele ratorpedal.Never
lea vethe vehicl ewhen itis held byhillstart
assi st.
Hill start assistisnot active if:
R you arepulling awayonal evelroad oron a
dow nhill gradient
R the transmissi onisin posi tion 005C
R the electric parkingbrake isapp lied
R ESP ®
is malfu nctioning EC
Os tart/stop function
Introduc tion The
ECO start/stop functionswitches the
engine offautomatical lyifthe vehicl eiss top-
ped under certain conditions.
The engine startsautomatica llywhen the
drive rwants topul lawa ya gain. The ECO
start/stop functiontherebyhelpsyou to
redu cethe fuel consumpti onand emiss ionsof
you rvehicl e.
Important safetynotes G
WARNING
If the engine isswi tched offautomatica lly
and youexit thevehicl e,the engine is
restarted automatical ly.T he vehicl emay
begi nmoving. Thereisar isk ofaccide ntand
injury .
If you wishtoe xitthe vehicl e,alw ayst urn
off the ignitio nand secure thevehicl e
aga inst rolling awa y. Gene
ralnote s 0043
ECO start/stop display
The ECO start/stop functionisactiva ted
whene veryou switch onthe engine using the
SmartKey orthe Start/Stop button.
If the engine hasbeen switched offautomati-
call ybythe ECO start/stop function,the00D6
ECO symb olisshow nint he multi function dis-
pla y.
Automatic engineswitch-off If
the vehicl eisb raked toas tandstil lwith the
transmissi onin005B or005C,t heECO start/stop
function switches offthe engine automatical ly.
The ECO start/stop functionisopera tional
when:
R the indica torlamp inthe ECO button islit
green
R the outsi detempera tureiswithi nthe range
that issui table forthe system
R the engine isat normal operatingtempera -
ture
R the settempera tureforthe vehicl einterior
has been reache d
R the battery issuffi ciently charged
R the system detects thatthewinds hieldis
not fogged upwhen theair-condi tioningsys-
tem isswi tched on
R the hood isclosed
R the drive r'sdoor isclosed andthedrive r's
seat beltisf astened
All ofthe vehicl e'ssystems remainactive
when theengine isstoppe dautomatical ly.
Automatic engineswitch-off cantake placea
maximu moffour times inar ow (initi alstop,
then three subsequ entstops).
The HOLD function canbeactiva tedifthe
engine hasbeen switched offautomatical ly.I t
is then notnecessa ryto continue applying the
brakes duringthe automatic stopphase.When
you depre ssthe accele ratorpedal,the engine Drivi
ng
121Drivi ngand parking Z

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

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
coolant tempera-
ture display showsa
value above 248‡
(120 †).The coolant
warning lampmayalso
be on and awarning
tone maysound. The
coolant levelistoo low. Thecoolant istoo hotand theengine is
no longer beingcooled sufficiently.
X Stop assoon aspossible andallow theengine andthecoolant to
cool down.
X Check thecoolant level(Ypage 243). Observe thewarning notes
as you dosoand add coolant ifnecessary. If
the coolant leveliscorrect ,the engine radiator fanmay befaulty.
The coolant istoo hotand theengine isno longer beingcooled suf-
ficiently.
X At coolant temperatures below248‡(120 †),drive tothe near-
est quali fiedspecialist workshop.
X Avoid heavy loadsonthe engine asyou doso, e.g. driving in
mountainous terrainandstop-and- gotraffic. Notes
ontowing vehicles
The vehicle isnot suitable forattaching tow
bar systems, suchasthose usedforflat tow-
ing ordinghy towing.
Att aching orusing towbarsystems mayresult
in damage tothe vehicle.
When towing avehicle withtowbarsystems,
safe driving characterist icscannot beguaran-
teed forthe towing vehicle orthe towed vehi-
cle.
The vehicle/vehicle combinationmayswerve.
Observe thepermissible towingmethods
(Y page 265)andthenotes ontowing with
both axles onthe ground (Ypage 265). DYNAMIC
SELECTbutton
Use theDYNAMIC SELECTbutton tochange
the drive program. Depending onthe drive pro-
gram selected thefollowing vehiclecharacter-
istics willchange:
R the drive (engine andtransmission manage-
ment)
R the suspension orthe adaptive adjustable
damping onlyonvehicles withAMG RIDE
CONTROL sportssuspension
R the sound ofthe exhaust system(vehicles
with sports exhaust system)
R the steering
R the availa bilityofthe ECO start/ stopfunc-
tion Each
timeyoustart theengine withtheSmart-
Key orthe Start /Stopbutton, driveprogram C
is activated. Forfurther information about
startin gthe engine, see(Ypage 119). X
Press DYNAMIC SELECTbutton 0043asmany
times asnecessary untilthedesired drive
program isselected.
The selected driveprogram appearsinthe
multifunct iondisplay .After as hort period of
time, thedisplay goesoutand thesymbol
for the selected driveprogram appears.
In addition, thecurrent driveprogram set-
tings aredisplay edbriefly inthe multimedia
system display.
i In
af ew countr ies,theECO start/ stop
funct ionisdeactivated atthe factory dueto
the availa blefuel grade. Inthis case, the
ECO start/ stopfunct ionisnot availa blein
any drive program, regardless ofthe display
in the multimedia systemdisplay.
In city traffic andstop-st arttraffic, drivepro-
gram Cis recommen ded. 124
DY
NAMIC SELECTbutt onDriving andparking

Merce
des-AMGSLC 43 0043
Transmi ssionposition
0044 Drive progra m
The current transmissi onposi tion anddrive
progra mappear inthe multi function display.
Eng aging parkpositi onP X
When thevehicl eiss tationa ry,depre ssthe
brake pedal.
X Press button 0043.
Eng aging parkpositi onPautomati-
call y Park
position 005Disau tomatical lyengag edif:
R you switch offthe engine using the Smart-
Key and remove theSmartKey
R you switch offthe engine using the Smart-
Key orusi ng the Start/Stop buttonand
open thedrive r'sdoor orfront-passenge r
door
R you open thedrive r'sdoor when thevehicl e
is stationa ryor when drivingatav ery low
spee dand the transmissi onisin posi tion 005B
or 005E
Under certain conditions, theautomatic trans-
missi onshifts automatical lyto transmissi on
posi tion 005Difthe HOLD function orActive Dis-
tance Assist DISTRONIC isactiva ted.Observe
the informati onon the HOLD function (Y
pag e152) and onActive Distance Assist
DISTRONIC (Ypag e148).
Eng aging reverse gearR !
Only
move theautomatic transmissi onto
005E when thevehicl eiss tationa ry.
X Depress thebrake andkeep itpresse d.
X Push thesele ctor lever forwa rdspast the
first point ofresis tance.
The ECO start/stop functionisnot available
when reverse gearise ngag ed.Further infor-
mation onthe ECO start/stop function
(Y pag e121) .
Shiftin gton eutral N G
WARNING
If child renareleft unsu pervi sedinthe vehi-
cle, they could:
R opera tethe vehicl e'sequ ipme nt
Additio nally,child rencoul dsetthe vehicl ein
motion if,for exampl e,they:
R relea sethe parking brake
R shift theautomatic transmissi onout of
park position 005D
R start theengine
There isar isk ofan accide ntand injury .
Never leavechild renoranima lsunattended
in the vehicl e.
When leaving thevehicl e,alw ayst ake the
SmartKey withyouand lock thevehicl e.This
als oa ppliesf or the Digita lVehicl eKeyifthe
"Digi talVehicl eKey" function isactiva tedvia
Mercede smeconnect.
X When thevehicl eiss tationa ry,depre ssthe
brake pedal.
X Push thesele ctor lever forwa rdsorback to
the first point ofresis tance.
If you switch the engine offwith thetransmis-
sion inposi tion 005Eor005B,t heautomatic trans-
missi onshifts to005C automatical ly.
With theSmartKey: ifyou then open thedriv-
er's door orthe front-passenge rdoor or
remove theSmartKey fromtheignitio n,the
au tomatic transmissi onshifts to005D automati-
call y. 126
Automatic
transmissio nDrivingand parking

With
KEYLESS-GO :if you then open thedriv-
er's orfront-passenge rdoor, theautomatic
transmissi onshifts to005D automatical ly.
If you want theautomatic transmissi onto
remai ninn eutral 005C,e.g.when havingthe
vehicl ecleaned inan automatic carwas hwith
at owing system:
X Vehic leswith KEYLESS-GO :remove the
Start/Stop buttonfromtheignitio nlock.
X Insert theSmartKey intotheignitio nlock.
X All vehi cles:swi tch the ignitio non.
X Depress thebrake pedaland keep it
depre ssed.
X Shift toneutral 005C.
X Rel ease thebrake pedal.
X Rel ease theelectric parkingbrake.
X Switch offthe ignitio nand leavethe Smart-
Key inthe ignitio nlock.
Eng agin gdrive position D X
When thevehicl eiss tationa ry,depre ssthe
brake pedal.
X Push thesele ctor leverback past thefirst
point ofresis tance. Transmissio
npositi ons 0045 Park
positi on
This prevents thevehicl efrom roll-
ing awa ywhen stoppe d.
Only shiftthetransmissi oninto
posi tion 0045 (Ypag e125) when
the vehicl eiss tationa ry.The park-
ing lock shou ldnot beused asa
brake whenparking.Alwa ysapp ly
the electronic parkingbrake inadd i-
tion tothe parki nglock inorder to
secure thevehicl e.
If the SmartKey isremoved fromthe
ignitio nlock, thetransmissi onis
locked.
The automatic transmissi onshifts
to 0045 automatical ly:
R when theSmartKey isremoved
from theignitio nlock
R when theengine isswi tched off
with thetransmissi oninposi tion
0046 or003A andone ofthe
doors isopened
In the event ofam alfunction ofthe
vehicl e'selectronics, thetransmis-
sion may lockinposi tion 0045.
Have thevehicl eelectronics
checked immediatelyataq ualified
speci alist worksho p. 0046 Reverse
gear
Only shiftthetransmissi oninto
posi tion 0046 when thevehicl eis
stationa ry. Automatic
transmissio n
127Drivi ngand parking Z