2017 MERCEDES-BENZ SLC door lock

X
To restore the factory settings: press and
hol dd ow nt he 6 and 7 buttons simul-
taneousl yf or approximatel ys ix seconds until
the battery check lamp ( Y
page 66 )f lashes
twice.
Mechanical key
General notes If the vehicl ec an no longer be locked or
unlocke dw it ht he SmartKey or with KEYLESS-
GO ,u se the mechanical key.
If yo uu se the mechanical key to unlock and
open the driver's door or the trunk lid, the anti-
thef ta la rm system will be triggered .S witch off
the alarm ( Y
page 61).
Removing the mechanical key
X
Push release catch C in the direction of the
arrow and at the same time remove mechan-
ica lk ey D from the SmartKey.
For further informatio na bout :R
unlocking the driver's door ( Y
page 70)R
unlocking the trunk ( Y
page 71)R
locking the vehicl e( Y
page 70)
Insertin gt he mechanical keyX
Push mechanical key D completel yi nto the
SmartKey unti lite ngages and release
catch C is back in its basi cp osition. SmartKey battery
Important safety notes
G WARNING
Batterie sc ontain toxi ca nd corrosive substan-
ces. If batteries are swallowed, it can resul ti n
severe health problems .T here is ar is koff atal
injury.
Kee pb at teries ou toft he reach of children. If
ab at tery is swallowed, see km edica la ttention
immediately.
H Environmental note
Batterie sc ontain dangerous
substances. It is against the
la wtod is pose of them with
the househol dr ubbish .T hey
must be collected separately
and recycle dtop rotect the
environment.
Dispose of batteries in an
environmentally friendly
manner. Take discharged
batteries to aq uali fied spe-
cialist workshop or as pecial
collectio np oi nt for used bat-
teries.
The SmartKey batteries contain perchlorate
material ,w hi ch ma yr equire specia lh an dling
and regard for the environment. National guide-
lines must be observed during disposal. In Cal-
ifornia ,s ee www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
Mercedes-Benz recommends tha ty ou have the
batteries replaced at aq uali fied specialist work-
shop. SmartKey 65
Opening and closing Z

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

Make sure that no body parts are in close
proximity during the closing procedure. If
someone becomes trapped, press the switch
to open the side window again.
Opening and closing the side win-
dows in the front The switches for the front side windows are
located on the driver's door. There is also a
switch for the front-passenger side window on
the front-passenger door.
The switches on the driver's door take prece-
dence.
C
LeftD
Right X
Turn the SmartKey to position 1 or 2 in the
ignition lock. X
To open manually: press and hold the cor-
responding switch. X
To open fully: press the switch beyond the
point of resistance and release it.
Automatic operation is started. X
To close manually: pull the corresponding
switch and hold it. X
To close fully: pull the switch beyond the
point of resistance and release it.
Automatic operation is started. X
To interrupt automatic operation: press or
pull the corresponding switch again.
You can continue to operate the side windows
after you switch off the engine. This function is
available for up to five minutes or until the driv-
er's or front-passenger door is opened. Opening and closing all side windows
Using the switch on the center console
G WARNING
While opening the side windows, body parts in
the closing area could become trapped. There
is ar isk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
somebody becomes trapped, release the
switch or press the switch down to open the
side window again.
You can use the switch on the center console to
close all side windows simultaneously. X
Open the cover in the lower center console.
The switch for all side windows is under the
cover.
X
To open all side windows: press button C
to the point of resistance. X
To open all side windows fully: press
switch C beyond the point of resistance. X
To close all side windows: pull switch C .
All side windows begin the closing procedure
simultaneously .T he rear side windows close
after the front side windows.
If, after opening the windows, you close one side
window using the switch in the door control
panel: R
the front side window closes first and R
then the corresponding rear side window
closes.Side windows 73
Opening and closing Z

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

Opening/closing using the SmartKey
Important safet yn otes
G WARNING
When opening or closing the roof, body parts
could be trapped by, for example, the roof
mechanism, trun kl id or side windows. There
is ar isk of injury.
When raising or lowering the roof, make sure
that no body parts are in the vicinity of moving
components. If someon eb ecomes trapped,
release the button.
Opening and closing This function is only available on vehicles with
KEYLESS-GO or with roof comfort operation. X
Close the trun kl id ( Y
page 70).X
Vehicles with comfort operation: point the
tip of the SmartKey at the driver's door han-
dle. X
Vehicles with KEYLESS-GO: the SmartKey
must be within 6ft(2m )o ft he vehicle.X
To open: press and hold the 6 button on
the SmartKey until the roof is fully opened.
The roof and the rear side windows open. The
fron ts ide windows close.X
To interrupt the opening procedure:
release the 6 button.X
To open the front side windows: press the
6 button on the SmartKey again.X
To close: press and hold the 7 button on
the SmartKey until the roof is fully closed.
The roof and the side windows close. X
To interrupt the closing procedure: release
the 7 button.
Locking the roof again
Important safet yn otes
G WARNING
If you do not fully open/close the soft top, the
soft-top hydraulics depressuriz ea fter as hort
time. This causes the soft top to lower unex-
pectedly and may cause you or other stob e
trapped. There is ar isk of injury. Always open or close the soft top completely.
The roof is not locked if: R
the Y symbol and the Vario-Roof in
Operation message appear in the multifunc-
tion display R
the Y symbol and the Open/Close
Vario-Roof Completely message appear in
the multifunction display and you hear aw arn-
ing tone R
you hear aw arning ton ef or up to ten seconds
when pulling away or while driving
Locking You can lock the roof again if it is not locked
fully. X
Pull over and stop the vehicle safely as soon
as possible, paying attention to road and traf-
fic conditions. X
Make sure that the SmartKey is in position 2
in the ignition lock. X
Press the roof switch ( Y
page 76).
Trunk partition
General notes
! To avoid damaging the roof or luggage when
folding back the roof, you should: R
only load the trun ktob elow the trun kp ar-
tition R
not place any objects on or in fron toft he
trun kp artition R
not place any objects on the cover behind
the roll bars R
not allow the cargo to push the trun kp ar-
tition upwards
The trun kp artition can be used to cover luggage
and loads in the trunk. Roof 77
Opening and closing Z