2020 MERCEDES-BENZ SLC light

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
engine cannot be
started usingtheSmart-
Key. The
on-board voltageistoo low.
X Switch offnon- essential consumers, e.g.seat heating orinterior
lighting, andtrytostart theengine again.
If this does notwork:
X Check thestarter battery andcharge itifnecessary
(Y page 260).
or
X Jump-start thevehicle (Ypage 261).
or
X Consult aquali fied specialist workshop. The
engine cannot be
started usingKEYLE SS-
GO. TheSmartK eyisin
the vehicle. The
vehicle islocked.
X Unlock thevehicle andtrytostart thevehicle again. The
SmartK eybattery isdischarged ornearly discharged.
X Check theSmartK eybattery (Ypage 69)and replace itifneces-
sary (Ypage 69).
If this does notwork:
X Start yourvehicle withtheSmartK eyinthe ignition lock. There
isinterf erence fromapowerful sourceofradio waves.
X Start yourvehicle withtheSmartK eyinthe ignition lock. You
have lostaSmart-
Key. X
Have theSmartK eydeactivated ataq ualified specialist work-
shop.
X Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. You
have lostthe
mechanical key. X
Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. The
side windows can-
not beopened orclosed
using theconven ience
opening/c losingfea-
ture. The
SmartK eybattery isdischarged ornearly discharged.
X Check theSmartK eybattery (Ypage 69)and replace itifneces-
sary (Ypage 69). Doo
rs Import
antsafety notes G
WARNING
If children areleft unsupervised inthe vehi-
cle, they could:
R operate thevehicle's equipment Additionally,
childrencouldsetthe vehicle in
motion if,for example, they:
R release theparking brake
R shift theautomatic transmission outof
park position 005D
R start theengine
There isar isk ofan accident andinjury. Doo
rs
71Opening andclosing
Z

Never
leavechildren oranimal sunattended
in the vehicle.
When leavingthe vehicle, always take the
SmartKey withyouand lock thevehicle. This
also appliesforthe Digital Vehicle Keyifthe
"Digital Vehicle Key"function isactivated via
Mercedes meconnect . Unlo
cking andopeni ngdoors from
the inside
! The
side window swilln ot open/close if
the battery isdischarge dorift he side win-
dows haveicedup.Itwil lthen notbepossi-
ble toclose thedoor. Donot attempt to
force thedoor closed. Youcould otherwise
dama gethe door orthe side window .
You canopen adoor from inside thevehicle
even ifit has been locked.
If the vehicle haspreviou slybeen locked from
the outside ,opening adoor from theinside
wil ltrigger theanti-theft alarm system. Switch
off the alarm (Ypage 64). X
Pull door handle 0044.
If the door islocked, lockingknob0043pops
up. The door isunlocked andcanbe
opened.
When adoor isopened, theside window on
that side opens slightly .When thedoor is
closed, theside window closesagain. Cen
trally locking andunloc kingthe
vehic lefrom theinside
You cancentrally lockorunlock thevehicle
from theinside. Forexample ,you can unlock the
front- passe ngerdoor from theinside or
lock thevehicle beforeyoupullawa y. X
To unloc k:press button 0043.
X To loc k:press button 0044.
If the front- passenger doorisclosed, the
vehicle locks.
The central locking buttondoesnotlock or
unlock thefuel fillerflap orthe stowage com-
partment inthe center console.
You cannot unlockthevehicle centrally from
the inside ifthe vehicle hasbeen locked with
the SmartKey orKEYLESS- GO.
You canopen adoor from inside thevehicle
even ifit has been locked.
If al ocked doorisopened fromtheinside, the
previou sunlock status ofthe vehicle willbe
taken intoconsideration if:
R the vehicle waslocked usingthelocking
button forthe central locking, or
R ifthe vehicle waslocked automa tically
The vehicle willbef ullyu nlocked ifit had pre-
viousl ybeen fullyunlocked. Ifonly thedriver's
door hadbeen previou slyunlocked, onlythe
door which hasbeen opened fromtheinside is
unlocked. 72
Do
orsOpeni ngand closi ng

X
Take themechanic alkey outofthe Smart -
Key (Ypage 68).
X Insert themechanic alkey into thetrunk lid
lock asfar asitwill go. X
Turn themechanic alkey from position 0047
count er-clockwise asfar asitwill gotoposi-
tion 0048.S imultaneously pullthetrunk lid
handle.
The trunk isunlocked.
X Turn themechanic alkey back toposition
0047 and remove it.
X Insert themechanic alkey into theSmart -
Key. Emergency
releaseforthe trunk
You canunlock thetrunk lidfrom theinside
with theemergenc yrelease button. X
Press emergenc yrelease button 0043briefly.
The trunk lidunlocks andopens.
The trunk lidcan beunlocked andopened with
the trunk lidemergenc yrelease whenthevehi-
cle isstation aryorwhile driving.
The trunk lidemergenc yrelease doesnot
unlock thetrunk lidifthe battery isdisconn ec-
ted ordischarged. Trunk
lidemergenc yrelease light:
R Emergen cyrelease button0043flashes for
30 minutes afterthetrunk lidisopened
R Emergen cyrelease button0043flashes for
60 minutes afterthetrunk lidisclosed Side
windows Import
antsafety notes G
WARNIN
G
While opening theside windows, bodyparts
could become trappedbetween theside
window andthedoor frame asthe side win-
dow moves. Thereisar isk ofinjury.
Make surethatnobody touches theside
window duringtheopening procedure. If
somebody becomestrapped,releasethe
switch orpull theswitch toclose theside
window again. G
WARNIN
G
While closing theside windows, bodyparts
in the closing areacould become trapped.
There isar isk ofinjury.
When closing makesurethatnoparts ofthe
body areinthe closing area.Ifsomebody
becomes trapped,releasetheswitch or
press theswitch toopen theside window
again. G
WARNIN
G
If children operatetheside windows they
could become trapped, particularly ifthey
are left unsupervised. Thereisar isk of
injury.
When leaving thevehicle, alwaystake the
Smart Keywith youand lock thevehicle.
Never leavechildren unsupervised inthe
vehicle. Side
window reversing feature
The front sidewindows areequipped withan
automatic reversingfeature.Ifas olid object
blocks orrestr ictstheupward movemen tof Side
window s
75Opening andclosing Z

one
ofthe front sidewindows duringtheclos-
ing process, theside window opensagain
automatically. Duringthemanual closingproc-
ess, theside window onlyopens againauto-
matically afterthecorrespon dingswitch is
released. However, theautomatic reversing
feature isonly anaid and does notrelieve you
of the responsibility ofpaying attentionwhen
closing aside window. G
WARNING
The reversing featuredoesnotrespond:
R to soft, lightandthin object s,e.g. fingers
R over thelast 1/6 in(4 mm) ofthe closing
movement
R while adjusting
R when closing theside window againman-
ually immediately afterautomatic revers-
ing
This means thatthereversing featurecan-
not prevent someone beingtrapped inthese
situations. Thereisar isk ofinjury.
Make surethatnobody parts areinclose
proximity duringtheclosing procedure. If
someone becomestrapped,pressthe
switch toopen theside window again. Opening
andclosi ngthe side win-
dows inthe front
The switches forthe front sidewindows are
located onthe driver's door.There isalso a
switch forthe front -passenger sidewindow on
the front -passenger door.
The switches onthe driver's doortakeprece-
dence. 0043
Left
0044 Right
X Turn theSmart Keytoposition 0047or0048 in
the ignition lock.
X To open manua lly:press andhold thecor-
responding switch.
X To open fully: press theswitch beyond the
pressure pointandrelease it.
Automat icoperation isstart ed.
X To close manua lly:pull thecorrespon ding
switch andhold it.
X To close fully:pulltheswitch beyond the
pressure pointandrelease it.
Automat icoperation isstart ed.
X To interr uptautom aticoperat ion:press
or pull thecorrespon dingswitch again.
You cancont inue tooperate theside windows
after youswitch offthe engine. Thisfunct ionis
availa bleforuptofive minutes oruntil the
driver's orfront -passenger doorisopened. Opening
andclosin gallside win-
dows
Using theswitch onthe center con-
sole G
WARNING
While opening theside windows, bodyparts
in the closing areacould become trapped.
There isar isk ofinjury.
Make surethatnobody parts areinclose
proximity duringtheclosing procedure. If
somebody becomestrapped,releasethe
switch orpress theswitch downtoopen the
side window again. 76
Side
window sOpening andclosing

You
canusetheswitc honthe cen tercon sole
to close allside windows simultaneously.
X Open thecoverinthe lower centercon sole.
The switc hfor all side windows isunder the
cov er. X
To open allside windows: pressbutton0043
to the point ofresist ance.
X To open allside windows fully:press
switc h0043 beyond thepoint ofresist ance.
X To close allside windows: pullswitc h0043.
All side windows begintheclosin gproc e-
dure simult aneously. Therear side windows
close afterthe fron tside windows.
If, afte ropenin gthe windows, youclose one
side window usingtheswitc hint he door con-
tr ol panel:
R the fron tside window closesfirs ta nd
R the nthe cor respon dingrearside window
close s.
Convenience closingwithKEYLESS-GO G
WARN
ING
When usingtheconvenienc eclosin gfeat ure,
part softhe body could betrapped inthe
closin garea when aside window isbeing
close d.There isar isk ofinjury.
Obser vethe com plete closin gproc edure
when theconvenienc eclosin gfeat ure is
operat ing.Make surethatnobody partsare
in close proximityduring theclosin gproc e-
dure. Proc
eedasfollows ifsomeo neistrapped:
X Release therecessed sensorsurfac eonthe
door handle.
X Imm ediately pulland hold thedoor handle
and keep thedoor handle pulled.
The side windows open.
With KEYLE SS-GO youcan close allside win-
dows simult aneously. TheKEYLE SS-GO key
must beoutsid ethe vehic le.All the doors
must beclose d. X
Touch recessed sensorsurfac e0043 onthe
door handle untilthe side windows arefully
close d.
i Make
sureyouonly touchrecessed sensor
surfac e0043.
X To inter rupt convenience closing:release
rec essed sensorsurfac e0043 onthe door
handle. Reset
tingthes ide windows
If as ide window cannolonge rbec lose dfully,
you must reset it.
X Close allthe doors .
X Turn theSmar tKey toposit ion0047or0048 in
the ignit ionlock .
X Pull thecorrespon dingswitc honthe door
con trol panel untilthe side window iscom -
pletely closed(Ypage 76).
X Hold theswitc hfor an addition alseco nd.
If the side window opensagainslightly:
X Imm ediately pullthecorrespon dingswitc h
on the door control panel untilthe side win-
dow iscom pletely closed(Ypage 76).
X Hold theswitc hfor an addition alseco nd.
If the respec tives ide window remains
close dafterthe butt onisreleased, thenit Side
windows
77Openingandclosing Z

has
been setcorrect ly.Ifthis isnot the
case, repeat thesteps above. Problems
withtheside window s G
WARNING
If you close aside window againimmediately afterithas been blocked, theside window closes
with increased ormaximum force.Thereversing functionisthen notactive. Partsofthe body
could betrapped inthe closing areainthe process. Thisposes anincreased riskofinjury or
even fatalinjury.
Make surethatnoparts ofthe body areinthe closing area.Tostop theclosing process,
release theswitch orpush theswitch againtoreopen theside window. Problem
Possible
causes/co nsequences and0050 0050
Solutions As
ide window cannot
be closed because itis
blocked byobject s,e.g.
leaves inthe window
guide. X
Remove theobject s.
X Close theside window. As
ide window cannot
be closed andyoucan-
not see thecause. If
as ide window isobstructed duringclosing andreopens again
slightly:
X Immediately afterthewindow blocks,pullthecorresponding
switch againuntiltheside window hasclosed.
The side window isclosed withincreased force.
If as ide window isobstructed againduring closing andreopens
again slightly:
X Immediately afterthewindow blocks,pullthecorresponding
switch againuntiltheside window hasclosed.
The side window isclosed without theautomatic reversingfunc-
tion. The
side windows can-
not beopened orclosed
using theconven ience
opening/closing fea-
ture. The
SmartKey batteryisdischarged ornearly discharged.
X Check theSmartKey battery(Ypage 69)and replace itifneces-
sary (Ypage 69). Roof
Import
antsafety notes G
WARNING
If you donot fully open/close thesoft top,
the soft- tophydrau licsdepressurize aftera
short time.Thiscauses thesoft toptolower
unexpectedly andmay cause youorothers
to be trapped. Thereisar isk ofinjury. Always
openorclose thesoft topcom-
pletely. G
WARNING
Closing theroof manually isac omplicated
and techn ically demanding procedure,which
requires alot ofstrengt h.You orothers can
become trapped. Thereisar isk ofinjury. 78
RoofOpening
andclosing

Problems
withtheseat heating Problem
Possible
causes/co nsequences and0050 0050
Solutions The
seat heating has
switched offprema-
turely orcannot be
switched on.The vehi-
cle's electrical system
voltage istoo low
because toomany elec-
trical consumers are
switched on. Switch
offelectrical consumers thatyoudonot need, suchasthe
rear window defroster orinterior lighting.
Once thebattery issufficiently charged,switchonthe seat heating
again. AIRSCA
RF
Setting headlevelheating (AIRSCARF) G
WARNING
When AIRSCARF isswitched on,very hotair
can flow from thevent sint he head
restraint s.This could result inburns inthe
immediate vicinityofthe airvent s.There isa
risk ofinjury.
Reduce theheater output beforeitbecomes
too hot. The
AIRSCARF functionwarms thehead and
neck areaofvehicle occupants withwarm air.
The warm airflows outofthe holes inthe head
restraint s.
The three redindicator lampsinthe button
indicate theheating levelyouhave selected.
X Ensure thattheSmartK eyisin position 0048
in the ignition lock.
X To switch on:press button 0043.
Three redindicator lampsinthe button light
up. The blower startsupafter apreheating
phase ofseven seconds. X
Press button 0043repeatedly untilthedesired
heating levelisset.
X To switch off:press button 0043repeatedly
until allthe indicator lampsgoout.
i The
blower continues running forseven
seconds tocool down theheating elements.
i If
the battery voltage istoo low, AIRSCARF
may switch off.
Problems withAIRSCA RF AIRSCARF
hasswitched offprematurely orwill
not switch on.The vehicle's electrical system
voltage istoo low because toomany electrical
consumers areswitched on.
X Switch offelectrical consumers thatyoudo
not need, suchasthe rear window defroster
or interior lighting.
X Switch onAIRSCARF again. Steering
wheel Import
antsafety notes G
WARNING
You could losecontrolofyour vehicle ifyou
do the following whiledriving:
R adjust thedriver's seat,head restraint ,
steering wheelormirrors
R fasten theseat belt
There isar isk ofan accident. Steering
wheel
89Seats,steering wheeland mir rors
Z

or
R you press theStart /Stopbutton onceon
vehicles withKEYLE SS-GO
When youclose thedriver's doorwiththeigni-
tion switched on,the steering wheelisalso
automatically movedtothe previously set
position.
The lastposition ofthe steering columnis
stored whenyouswitch offthe ignition or
when youstore thesettingwith thememory
funct ion(Ypage 95).
Crash- responsive EASY-EXIT featur e If
the crash-r esponsive EASY-EXI Tfeature is
triggered inan accident ,the steering column
will move upwards whenthedriver's dooris
opened. Thisoccurs irrespect iveofthe posi-
tion ofthe Smart Keyinthe ignition lock.This
makes iteasier toexit thevehicle andrescue
the occupant s.
The crash-r esponsive EASY-EXI Tfeature isonly
operational ifthe EAS Y-EXI T/ENTRY featureis
activated inthe on-board computer
(Y page 179). Mirr
ors Inside
rearview mirror X
Anti-glare mode:flickanti-glare lever0043
forwards orback. Exterior
mirrors
Adjust ingthe exterior mirrors G
WARNING
You could losecontrolofyour vehicle ifyou
do the following whiledriving:
R adjust thedriver's seat,head restraint ,
steering wheelormirrors
R fasten theseat belt
There isar isk ofan accident .
Adjust thedriver's seat,head restraint ,
steering wheelandmirror andfasten your
seat beltbefore startingthe engine. G
WARNING
The exter iormirror onthe front -passenger
side reduces thesize ofthe image. Visible
object sareactually closerthantheyappear.
This means thatyoucould misjudge thedis-
tanc efrom road users traveling behind,e.g.
when changing lane.There isar isk ofan
accident .
For this reason, alwaysmake sure ofthe
actual distance fromtheroad users traveling
behind byglancing overyour shoulder. X
Make surethattheSmart Keyisin position
0047 or0048 inthe ignition lock.
X Press button 0043for the left exter iormirror
or button 0044for the right exteriormirror.
The indicator lampinthe correspon dingbut-
ton lights upinred.
The indicator lampgoesoutagain after
some time.Youcanadjust theselected 92
Mirr
orsSeats, steering wheelandmirrors