MERCEDES-BENZ SLC 2018 Manual PDF

Problems with the SmartKey Problem
Possible causes/consequences and P Solutions
You can no longer lock or
unlock the vehicle using
the SmartKey. The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 68) and replace it if necessary
( Y
page 68).
If this does not work: X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key.
There is interference from ap owerful source of radio waves.X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key.
The SmartKey is faulty. X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key. X
Have the SmartKey checked at aq ualified specialist workshop.
You can no longer lock or
unlock the vehicle using
KEYLESS-GO. KEYLESS-GO was deactivated. X
Reactivate KEYLESS-GO ( Y
page 65).
The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 68) and replace it if necessary
( Y
page 68).
If this does not work: X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key.
There is interference from ap owerful source of radio waves.X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key.
KEYLESS-GO is malfunctioning. X
Lock/unlock the vehicle using the remote control function of the
SmartKey. X
Have the vehicle and SmartKey checked at aq ualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote con-
trol function: X
Unlock ( Y
page 72) or lock ( Y
page 72) the vehicle using the
mechanical key. X
Have the vehicle and SmartKey checked at aq ualified specialist
workshop. SmartKey 69
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 253).
or X
Jump-start the vehicle ( Y
page 253).
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 68) and replace it if necessary
( Y
page 68).
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.
The side windows cannot
be opened or closed
using the convenience
opening/closing fea-
ture. The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 68) and replace it if necessary
( Y
page 68).
Doors
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
operate the vehicle's equipment. Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake R
shift the automatic transmission out of park
position P R
start the engine
There is ar isk of an accident and injury.
Never leave children or animals unattended in
the vehicle.70
Doors
Opening and closing

When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. This
also applies to mobile phones if the "Digital
Car Key in smartphone" function is activated
via the Mercedes me connect web app.
Unlocking and opening doors from
the inside
! The side windows will not open/close if the
batter yisd ischarged 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, opening ad oor from the inside will
trigger the anti-theft alarm system. Switc ho ff
the alarm ( Y
page 64).
X
Pull door handle D .
If the door is locked, lockin gk no b 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-passenger door 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-passenger door is closed, the vehi-
cle locks.
The central lockin gb utton does not lock or
unlock the fuel filler flap or the stowage com-
partmen tint he 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 into consideration if: R
the vehicle was locked using the lockin gb ut-
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 71
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 64). 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 295).
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.72
Trunk
Opening and closing

Opening/closing from outside
Opening X
Press the 6 button on the SmartKey.X
Pull handle C .X
Raise the trun kl id.
Closing
X
Pull the trun kl id down using recess C .X
Lock the vehicle if necessary using the 7
button on the key or with KEYLESS-GO.
If KEYLESS-GO detects aS martKey in the trunk,
it does not lock.
Locking the trunk separately You can lock the trun ks eparately. If you then
unlock the vehicle centrally, the trun kr emains
locked and cannot be opened. X
Close the trun kl id.X
Take the mechanical key out of the SmartKey
( Y
page 67). X
Inser tt he mechanical key into the trun kl id
lock as far as it will go. X
Turn the mechanical key clockwise from posi-
tion G to position H .X
Remove the mechanical key. X
Inser tt he mechanical key into the SmartKey.
Unlocking the trunk (mechanical key)
! The trun kl id swings upwards when opened.
Therefore, make sure that there is sufficient
clearanc ea bove the trun kl id.
If the trun kc annot be unlocked with the Smart-
Key or KEYLESS-GO, use the mechanical key.
If you use the mechanical key to unlock and
open the trun kl id, the anti-thef ta larm system
will be triggered. Switc ho ff the alarm
( Y
page 64). X
Take the mechanical key out of the SmartKey
( Y
page 67). X
Inser tt he mechanical key into the trun kl id
lock as far as it will go.
X
Turn the mechanical key from position G
counter-clockwise as far as it will go to posi- Trunk 73
Opening and closing Z

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.
Emergenc yr elease fo rt he trunkYo 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.74
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 G or H in the
ignition lock. X
To open manually: press and hold the cor-
responding switch. X
To open fully: press the switch beyond the
pressure point 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
pressure point 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 75
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 indowsIf 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 G or H 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 75).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 75).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.
Problem sw ith th es id ew indows
G WARNING
If you close as ide window again immediately after it has been blocke dorr eset ,t he side window
closes wit hi ncreased or maximum force. The reversing feature is then no ta ctive. Part soft he
body coul dbet ra pped in th ec losin ga rea in th ep rocess. This pose sani ncreased ris kofi njury or
eve nf atal injury.
Mak es ure that no part soft he body are in th ec losin ga rea. To stop th ec losin gp rocess, release
th es witch or push th es witch again to reopen th es ide window.76
Sid ew indows
Opening and closing

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.
The side windows cannot
be opened or closed
using the convenience
opening/closing fea-
ture. The SmartKey battery is discharged or nearly discharged. X
Check the SmartKey battery ( Y
page 68) and replace it if necessary
( Y
page 68).
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. R
the trunk lid is closed. R
the outside temperature is above 5‡
(

Make sure that the roof and rear window are
clean and dry before opening the roof. Other-
wise, water or dirt could enter the vehicle inte-
rior or trunk.
Opening and closing using the roof
switch
Important safety notes
G WARNING
When opening or closing the roof, body parts
could be trapped by, for example, the roof
mechanism, trunk lid 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 someone becomes trapped,
release the button.
For safety reasons, you can only open or close
the roof when the vehicle is stationary.
! Operating the roof while pulling away: R
Observe the following traffic carefully. R
Do not drive faster than 25 mph (40 km/h). R
Avoid abrupt braking and swerving maneu-
vers.
Do not operate the roof when cornering, driv-
ing on uneven surfaces or during strong
winds. The vehicle may otherwise be dam-
aged.
i If the traffic condition sm ean that you have
to drive off while opening/closing the roof,
the procedure which was started while sta-
tionary can be continued at speeds of up to
approximately 25 mph (40 km/h). Opening and closing X
Vehicles without semi-automatic trunk
partition: close the trunk partition
( Y
page 79). X
Close the trunk lid ( Y
page 72).X
Turn the SmartKey to position H in the igni-
tion lock. X
Open the cover in the lower center console.
Roof switch C is located under the cover. X
To open :p ull roof switch C until the entire
roof is stowed away in the trunk.
The Vario-Roof in Operation
message
appears in the multifunction display .O nce the
opening procedure is complete, the message
disappears and at one sounds.
All of the side windows open.
If you operate the roof switch and the Trunk
Partition Open message appears in the
multifunction display ,t he trunk partition is
not closed correctly. X
Close the trunk partition. X
To close: press and hold soft-top switch C
until the soft top is fully closed.
The Vario-Roof in Operation
message
appears in the multifunction display .O nce the
opening procedure is complete, the message
disappears and at one sounds.
All of the side windows open. X
To close all side windows, pull the switch
under the cover of the center console
( Y
page 75).78
Roof
Opening and closing