2017 MERCEDES-BENZ SLC light

Checking th eb atteryX
Press the 7 or 6 button.
The battery is working properl yifb attery
check lamp C light supb riefly.
The battery is discharged if battery check
lamp C does no tl ight up briefly.X
Change th eb attery ( Y
page 66).
If th eS ma rtKey battery is checked within the
signal reception range of th ev ehicle ,p ressing
the 7 or 6 button:R
locks or R
unlock st he vehicle
i You can get ab attery at any qualified spe-
cialist workshop.
Replacin gt he batteryYou require aCR2 02 53V cel lb attery.X
Tak et he mechanical ke yo ut of th eS ma rtKey
( Y
page 65).
X
Press mechanical key D int ot he SmartKey
opening in th ed irection of th ea rrow until bat-
tery compartmen tc over C opens. Do not
hold battery compartmen tc over C closed
while doin gs o.X
Remove battery compartmen tc over C . X
Repeatedly tap th eS ma rtKey against your
palm until battery

Problem
Possible causes/consequences and P Solutions
The engine cannot be
started using the Smart-
Key. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work: X
Check the starter battery and charge it if necessary ( Y
page 248).
or X
Jump-start the vehicle ( Y
page 249).
or X
Consult aq ualified specialist workshop.
The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle. The vehicle is locked. X
Unlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 66) and replace it if necessary
( Y
page 66).
If this does not work: X
Start your vehicle with the SmartKey in the ignition lock.
There is interference from ap owerful source of radio waves.X
Start your vehicle with the SmartKey in the ignition lock.
You have lost aS mart-
Key. X
Have the SmartKey deactivated at aq ualified specialist workshop.X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
Doors
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment. Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position P R
Start the engine.
There is ar isk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.68
Doors
Opening and closing

Unlocking and opening doors from
the inside
! The side windows will not open/close if the
battery is discharged or if the side windows
have iced up. It will then not be possible to
close the door. Do not attempt to forc et he
door closed. You could otherwise damage the
door or the side window.
You can open ad oor from inside the vehicle
even if it has been locked.
If the vehicle has previously been locked from
the outside, openin gad oor from the inside will
trigger the anti-theft alarm system .S witc ho ff
the alarm ( Y
page 61).
X
Pull door handle D .
If the door is locked, locking knob C pops up.
The door is unlocked and can be opened.
When ad oor is opened, the side window on that
side opens slightly. When the door is closed, the
side window closes again.
Centrally locking and unlocking the
vehicle from the inside You can centrally lock or unlock the vehicle from
the inside. For example, you can unlock the
front-passenge rd oor from the inside or lock the
vehicle before you pull away. X
To unlock: press button C .X
To lock: press button D .
If the front-passenge rd oor is closed, the vehi-
cle locks.
The central locking button does not lock or
unlock the fuel filler flap or the stowage com-
partment in the center console.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
You can open ad oor from inside the vehicle
even if it has been locked.
If al ocked door is opened from the inside, the
previous unlock status of the vehicle will be
taken int oc onsideratio ni f:R
the vehicle was locked using the locking but-
ton for the central locking, or R
if the vehicle was locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature Doors 69
Opening and closing Z

X
To deactivate: press and hol db ut ton C for
abou tf iv es econds unti lat one sounds.X
To activate: press and hol db ut ton D for
abou tf iv es econds unti lat one sounds.
If yo up ress one of the two buttons and do not
hea rat one, the relevant setting ha sa lr eady
been selected.
The vehicl eisl oc ked automaticall yw he nt he
ignition is switched on and the wheels are turn-
ing.
Yo uc ould therefore lock yoursel fo ut if:R
the vehicl eisb ei ng pushed.R
the vehicl eisb ei ng towed.R
the vehicl eisonar olle rd yn amometer.
Yo uc an also switch the automatic locking func-
tio nona nd off using the on-board computer
( Y
page 173).
Unlocking/lockin gt he driver's door
using the mechanical key
i If yo uw an ttoc entrall yl oc kt he vehicl eu si ng
the mechanical key ,b egin by pressing the
locking button for the interio rl oc king mech-
anism whil et he driver's door is open. Then
lock the driver's door using the mechanical
key.
X
To unlock: turn the mechanical key counter-
clockwise as far as it will go to position G .X
To lock: turn the mechanical key clockwise as
far as it will go to position G .
If yo uu se the mechanical key to unlock and
open the driver's door, the anti-thef ta la rm sys-
tem will be triggered .S witch off the alarm
( Y
page 61). Trunk
Important safety notes
G WARNING
If objects, luggage or load sa re not secured or
not secured sufficiently ,t hey could slip ,t ip
ove rorbef lung around and thereb yh it vehicle
occupants. There is ar is kofi njury ,p ar ticu-
larly in the event of sudden braking or as ud -
de nc hange in direction.
Alway ss tor eo bj ects so tha tt hey canno tb e
flung around .S ecure objects, luggage or
load sa gain st slipping or tipping before the
journey.
! The trunk li ds wi ng su pwar ds when opened.
Therefore, make sure tha tt her eiss uf ficient
clearance above the trunk lid.
! Onl yc lose the trunk once the roo fisl owere d
completely. Otherwise, yo uc ould damag et he
roof.
If yo uc lose the trunk li db ef ore the roo fi s
lowered completely, the loading ai ds wi tch
lights up and aw ar ning tone sounds.
The opening dimensions of the trunk li dc an be
found in the "Vehicle data" section
( Y
page 289).
Do not leave the SmartKey in the trunk. You
could otherwise lock yoursel fo ut .
The trunk li dc an be: R
opened/close df rom outside R
opene da ut omaticall yf rom outsideR
locked separately R
opene dw it ht he emergency release button R
unlocke dw it ht he mechanical key
Yo us houl dp referabl yp la ce luggage or load si n
the trunk.70
Trunk
Opening and closing

tion H .S imultaneousl yp ul lt he trunk li dh an -
dle.
The trunk is unlocked. X
Turn the mechanica lk ey back to position G
and remove it. X
Insert the mechanica lk ey into the SmartKey.
Trunk emergenc yr eleaseYo uc an unlock the trunk li df ro mt he insid ew it h
the emergency release button.
X
Press emergency release button C briefly.
The trunk li du nlocks and opens.
The trunk li dc an be unlocke da nd opene dw it h
the trunk li de mergency release when the vehi-
cle is stationar yorw hile driving.
The trunk li de mergency release does not unlock
the trunk li dift he battery is disconnecte do r
discharged.
Trunk li de mergency release light:R
Emergency release button C flashe sf or
30 minute sa ft er the trunk li diso pe nedR
Emergency release button C flashe sf or
60 minute sa fter the trunk li disc losed
Side windows
Important safety notes
G WARNING
Whil eo pe ning the side windows ,b od yp ar ts
could become trapped between the side win-
do wa nd the door frame as the side window
moves .T here is ar is kofi njury.
Make sure tha tn obod yt ouche st he side win-
do wd ur in gt he opening procedure. If some- body become st rapped ,r elease the switch or
pull the switch to close the side windo wa gain .
G WARNING
Whil ec losing the side windows ,b od yp ar ts in
the closing area could become trapped .T here
is ar is kofi njury.
When closing make sure tha tnop ar ts of the
body ar eint he closing area .Ifs omebody
become st rapped ,r elease the switch or press
the switch to open the side windo wa gain .
G WARNING
If children operate the side windows they
could become trapped ,p ar ticularly if the ya re
left unsupervised .T here is ar is kofi njury.
When leaving the vehicle, always take the
SmartKe yw it hy ou and lock the vehicle. Never
leav ec hildren unsupervised in the vehicle.
Side windo wr eversin gf ea tureThe front side windows ar ee quippe dw it ha n
automatic reversing feature. If as olid object
blocks or restricts the upward movement of one
of the front side windows durin gt he closing
process, the side windo wo pe ns agai na ut omat-
ically. During the manua lc losing process, the
side windo wo nl yo pe ns agai na ut omatically
after the corresponding switch is released. How-
ever, the automatic reversing featur eiso nl ya n
ai da nd does not relieve yo uoft he responsibility
of paying attentio nw he nc losing as id ew in dow.
G WARNING
The reversing featur ed oe sn ot react:R
to soft, light and thi no bj ects ,e .g .s mall fin-
gers R
ove rt he last 1/6 in(4 mm) of the closing
movement R
durin gr esetting R
when closing the side windo wa gain man-
uall yi mm ediatel ya ft er automatic reversing
Thi sm eans tha tt he reversing featur ec annot
prevent someone being trapped in these sit-
uations. There is ar is kofi njury.72
Side windows
Openin ga nd closing

Convenience closing with KEYLESS-GO
G WARNING
When usin gt he convenience closin gf eature,
part soft he body coul dbet ra pped in th ec los-
ing area when as ide window is bein gc losed.
Ther eisar is kofi njury.
Observ et he complet ec losin gp rocedure
when th ec onvenience closin gf eature is oper-
ating. Mak es ure that no body part sa re in
close proximity durin gt he closin gp rocedure.
Procee dasf ollows if someon eist ra pped:X
Release th er ecessed sensor surface on the
door handle. X
Immediately pull and hold th ed oor handle
and keep th ed oor handle pulled.
The side windows open.
Wit hK EY LESS-GO you can close all side win-
dows simultaneously. The KEYLESS-GO key
must be outside th ev ehicle .A ll th ed oor sm ust
be closed.
X
Touc hr ecessed sensor surface C on the
door handle until th es ide windows are fully
closed.
i Mak es ure you only touch recessed sensor
surface C .X
To interrup tc onvenience closing: release
recessed sensor surface C on th ed oor han-
dle.
Resetting th es id ew indows
If as ide window can no longer be closed fully,
you must reset it. X
Close all th ed oors. X
Turn th eS ma rtKey to position 1 or 2 in the
ignition lock. X
Pull th ec orrespondin gs witch on th ed oor
control panel until th es ide window is com-
pletely closed ( Y
page 73).X
Hol dt he switch for an additional second.
If th es ide window open sa gain slightly:X
Immediately pull th ec orrespondin gs witch on
th ed oor control panel until th es ide window is
completely closed ( Y
page 73).X
Hol dt he switch for an additional second.
If th er espectiv es ide window remains closed
after th eb utto nisr eleased, then it has been
set correctly. If this is no tt he case, repeat the
steps above.74
Sid ew indows
Opening and closing

Problems with the side windows
G WARNING
If you close as ide window again immediately after it has been blocked or reset, the side window
closes with increased or maximum force. The reversing feature is then not active. Parts of the
body could be trapped in the closing area in the process. This poses an increased risk of injury or
even fatal injury.
Make sure that no parts of the body are in the closing area. To stop the closing process, release
the switch or push the switch again to reopen the side window.
Problem
Possible causes/consequences and P Solutions
As ide window cannot be
closed because it is
blocked by objects, e.g.
leaves in the window
guide. X
Remove the objects. X
Close the side window.
As ide window cannot be
closed and you cannot
see the cause. If as ide window is obstructed during closing and reopens again
slightly: X
Immediately after the window blocks, pull the correspondin gs witch
again until the side window has closed.
The side window is closed with increased force.
If as ide window is obstructed again during closing and reopens again
slightly: X
Immediately after the window blocks, pull the correspondin gs witch
again until the side window has closed.
The side window is closed without the automatic reversing feature.
Roof
Important safety notes
G WARNING
If you do not fully open/close the soft top, the
soft-top hydraulics depressurize after as hort
time. This causes the soft top to lower unex-
pectedly and may cause you or others to be
trapped. There is ar isk of injury.
Always open or close the soft top completely.
G WARNING
Closing the roof manually is ac omplicated
and technically demanding procedure, which
requires al ot of strength. You or others can
become trapped. There is ar isk of injury.
Only have the soft top closed manually at a
qualified specialist workshop. ! Never sit on the rear shelf or store heavy
object st here. You will otherwise damage the
roof and the rear shelf of your vehicle.
! Do not forget that the weather can change
abruptly. Make certain that the roof is closed
when you leave the vehicle. The vehicle elec-
tronics can be damaged if water enters the
vehicle interior.
! When opening and closing the roof, make
sure that: R
there is sufficient clearance, as the roof
swings upwards. R
there is sufficient clearance behind the
vehicle, as the trunk lid swings backwards
beyond the bumper. R
the trunk is only loaded to below the trunk
partition. R
the trunk partition is not pushed up by the
load. R
the trunk partition is closed. Roof 75
Opening and closing Z

You can adjust the contour of the seat backrests
individually to provide optimum support for your
back.
Switching th es eat heating on/off
Switching on/off
G WARNING
Repeatedly switching on the seat heatin gc an
cause the seat cushio na nd backrest pads to
becom ev ery hot .T he health of person sw ith
limited temperature sensitivity or al imited
ability to react to excessively high tempera-
ture sm ay be affected or the ym ay even suffer
burn-like injuries. There is ar isk of injury.
Therefore, do not switc ht he seat heatin go n
repeatedly.
Driver' sa nd front-passenger seat
The three red indicator lamps in the button indi-
cat et he heatin gl evel you have selected.
The syste ma utomatically switches down from
level 3 to level 2 afte ra pproximately eight
minutes.
The syste ma utomatically switches down from
level 2 to level 1 afte ra pproximately ten
minutes.
The syste ma utomatically switches off approx-
imately 20 minutes afte ritiss et to level 1 .X
Make sure that the SmartKey is in position 1
or 2 in the ignition lock.X
To switch on: press button C repeatedly
until the desired heatin gl evel is set.X
To switch off: press button C repeatedly
until all the indicator lamps go out. Problem sw ith th es eat heatingThe seat heatin gh as switched off prematurely
or cannot be switched on. The vehicle's electri-
cal syste mv oltage is too low because too many
electrical consumers are switched on. X
Switch off electrical consumers that you do
not need, such as the rear window defroster
or interior lighting. X
Onc et he battery is sufficiently charged,
switc hont he seat heatin ga gain.
AIRSCARF
Switching on/off
G WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints.
This could result in burns in the immediate
vicinity of the air vents. There is ar isk of injury.
Reduce the heater output befor eitb ecomes
too hot.
The AIRSCARF function warms the head and
nec ka rea of vehicle occupant sw ith warm air.
The warm air flows out of the holes in the head
restraints.
The three red indicator lamps in the button indi-
cat et he heatin gl evel you have selected. X
Make sure that the SmartKey is in position 2
in the ignition lock. X
To switch on: press button C .
Three red indicator lamps in the button light
up. The blower starts up afte rap reheating
phase of seven seconds. Seats 85
Seats, steering wheel and mirrors Z