2018 MERCEDES-BENZ SLC warning light

General note s. .............................. .1 18
Q QR code
Mercedes-Ben zG uide Ap p. ................ 1
Rescue car d. ................................... .2 8
Qualified specialist workshop ........... 27
R RACE TIMER (on-board computer,
Mercedes-AMG vehicles) .................. 175
Radio
Selecting as tation ........................ .1 68
see Digita lO perator's Manual
Radio mode
see also Digita lO perator's Man-
ua l. ................................................ .2 11
Radio-wave reception/transmis-
sio nint he vehicle
Declaratio nofc onformity ................ 26
Readin gl amp ....................................... 99
Rear fog lamp
Display message ............................ 189
Switching on/off .............................. 96
Rear lamps
see Lights
Rear vie wc amera
Cleaning instructions ..................... 242
Display in the multimedi as ystem .. 155
Function/notes ............................ .1 54
Switching on/off ........................... 155
Rear window defroster
General notes ................................ 111
Problem (malfunction) ................... 112
Switching on/off ........................... 111
Rear-vie wm irror
Anti-glare (manual ). ......................... 90
Dipping (automatic) ......................... 92
Refrigerant (air-conditioning sys-
tem)
Important safety notes .................. 294
Refueling
Fuel gauge ....................................... 32
Important safety notes .................. 129
Refueling proces s. ......................... 130
see Fuel Remote control
Programming (garage door
opener) .......................................... 229
Replacing bulbs
High-beam headlamps ................... 100
Important safety notes .................... 99
Installing/removing the cover
(front wheel arch) .......................... 100
Low-beam headlamps .................... 100
Overview of bul bt ype s. ................. 100
Reportin gs afety defects .................... 27
Rescue card ......................................... 28
Reserve (fue lt ank)
see Fuel
Reserve fuel
Display message ............................ 192
Warning lamp ................................. 207
Residual heat (climate control) ....... .1 12
Restrain ts ystem
Display message .............. .............. 185
Introdu cti on ..................................... 38
Warning lamp ................................. 206
Warning lamp (function) ................... 38
Reverse gear
Engaging (automatic transmis-
sion) ............................................... 123
Reversibl ef loor panel (trunk) .......... 221
Reversing feature
Side windows ................................... 74
Reversing lamps (display mes-
sage) ................................................... 189
Roadside Assistanc e( breakdown) .... 25
Roof
Display message ............................ 200
Important safety notes .................... 77
Opening/closing (with roof
switch) ............................................. 78
Opening/closing (with SmartKey ). ... 79
Overview .......................................... 77
Problem (malfunction) ..................... 83
Relocking ......................................... 79
Roof carrier ........................................ 221
Roof switch .......................................... 78
Route guidance
see also Digita lO perator's Man-
ua l. ................................................ .2 11
Route guidance active ..................... .1 67Index 15

SmartKey
Changing the battery ....................... 68
Changing the programming ............ .6 6
Checkin gt he battery ...................... .6 8
Display message ............................ 201
Doo rc entral locking/unlocking ....... 65
Important safety note s. ................... 65
Los s. ................................................ 69
Mechanical key ................................ 67
Opening/closing the roo f. ............... 79
Overview .......................................... 65
Positions (ignition lock) ................. 116
Problem (malfunction) ..................... 69
Starting the engine ........................ 118
SMS
see also Digital Operator's Man-
ua l. ................................................. 211
Sno wc hains ...................................... 262
Sockets
Center console .............................. 223
Genera ln otes ................................ 223
Sound
Switching on/of f. .......................... 212
Special seat belt retractor .................. 54
Specialist workshop ............................ 27
Speed, controlling
see Cruise control
Speedometer
Digital ............................................ 167
In the Instrument cluster ................. 32
Segments ...................................... 163
Selecting the display uni t. .............. 172
Sport handlin gm ode
Activating/deactivating
(Mercedes-AM GS LC 43) ................. 62
Warning lamp ................................. 206
Standin gl amps
Displa ym essage ............................ 189
Switching on/of f. ............................. 96
Start/sto pf unction
see ECO start/stop function
Startin g( engine ) ................................ 117
Steering
Displa ym essage ............................ 200
Steering wheel
Adjusting (electrically) ..................... 89
Adjusting (manually) ........................ 88
Butto no verview ............................... 33 Buttons (on-board computer) ......... 164
Important safety notes .................... 88
Storing settings (memory func-
tion) ................................................. 93
Steering whee lp addle shifters ........ 126
Stopwatch (RACETIMER) ................... 175
Stowag ea reas ................................... 219
Stowag ec om partments
Armrest (under ). ............................ 219
Cente r console .............................. 220
C u ph olders ................................... 221
Door ............................................... 220
Eyeglasses compartment ............... 220
Glove box ....................................... 219
Important safety information ......... 219
Rear wall ........................................ 220
Stowag en et ................................... 220
Stowag en et ....................................... 220
Summe rt ires ..................................... 262
Sun visor ............................................ 222
Surround lighting (on-board com-
puter) .................................................. 173
Switchin ga ir-recirculatio nm ode
on/off ................................................. 112
Switchin gonm edi am ode
Via the device list .......................... 217
T
Tachometer ........................................ 163
Tail lamps
Displa ym essage ............................ 189
see Lights
Tank content
Fue lg auge ....................................... 32
Technical data
Capacities ...................................... 290
Emergency spare whee l. ................ 286
Information .................................... 288
Tires/wheels ................................. 284
Vehicl ed at a. .................................. 295
TELEAID
Call priority .................................... 227
Emergency cal l. ............................. 225
Genera ln otes ................................ 224
MB info cal lb ut ton ........................ 226
Roadsid eA ssistance button .......... 226
Self-test ......................................... 224 Index 17

regular interval sw hile the engine is running.
Therefore, malfunctions can be detected in
good time.
The u restraint system warning lamp on the
instrument cluster lights up when the ignitio ni s
switched on. It goes out no later than af ew sec-
onds after the vehicl eiss tarted. The compo-
nents of the restraint system are in operational
readiness.
Am alfunction has occurred if the u restraint
system warning lamp: R
does not light up after the ignitio niss witched
on R
does not go out after af ew seconds with the
engine running R
lights up again while the engine is running
G WARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or may not deploy as
intended during an accident. This can affect
for exampl et he Emergency Tensioning
Device or the air bag .T his poses an increased
risk of injury or even fatal injury.
Have the restraint system checked and
repaired in aq ualified specialist workshop as
soon as possible.
PASSENGER AI RB AG indicator lamp
PASSENGER AIR BAG ON indicator lamp C and
PASSENGER AIR BAG OFF indicator lamp D are
part of the Occupant Classification System
(OCS). The indicator lamp sd isplay the status of the
front-passenge rf ront air bag. R
PASSENGER AIR BAG ON lights up for 60 sec-
onds, subsequently both indicator lamp sa re
off (PASSENGER AIR BAG ON and OFF): the
front-passenge rf ront air bag is abl etod eploy
in the event of an accident. R
PASSENGER AIR BAG OFF lights up: the front-
passenger front air bag is deactivated. It will
then not be deploye dint he event of an acci-
dent.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator
lamp shows the status of the front-passenger
front air bag .T he PASSENGER AIR BAG OFF
indicator lamp may be lit continuously or be off.
Depending on the person in the front-passenger
seat, the front-passenge rf ront air bag must
either be deactivated or enabled; see the fol-
lowing points. You must make sure of this both
before and during aj ourney.R
Children in ac hil dr estraint system:
whethe rt he front-passenge rf ront air bag is
enabled or deactivated depends on the instal-
led child restraint system, and the age and
size of the child .T herefore, be sure to observe
the notes on the "Occupant Classification
System (OCS)" ( Y
pag e4 5) and on "Chil-
dren in the vehicle" ( Y
pag e5 3). There you
wil la ls of ind instructions on rearward and
forward-facing child restraint systems on the
front-passenge rs eat. R
All other persons: depending on the classi-
ficatio noft he person in the front-passenger
seat, the front-passenge rf ront air bag is ena-
bled or deactivated ( Y
pag e4 5). Be sure to
observe the notes on "Seat
belts“ ( Y
pag e3 9) and "Air bags"
( Y
pag e4 3) .T here you can als of ind infor-
mation on the correct seat position.
Seat belts
Introduction
Seat belts are the most effective means of
restricting the movement of vehicl eo ccupants
in the event of an accident or the vehicl er olling
over. This reduces the risk of vehicl eo ccupants
coming into contact with parts of the vehicle
interior or being ejected from the vehicle. Fur-
thermore, the seat belt help stok eep the vehicleOccupant safety 39
Safety Z

G WARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenge rf ront air bag is
disabled. It wil ln ot be deploye dint he event of
an accident and cannot perform its intended
protective function. Ap erso nint he front-
passenger seat coul dt hen, for example, come
into contact with the vehicle's interior, espe-
cially if the perso niss itting too close to the
dashboard. This pose sani ncreased risk of
injury or even fatal injury.
When the front-passenge rs eat is occupied,
alway se nsure that:R
the classification of the perso nint he front-
passenger seat is correct and the front-
passenger front air bag is enabled or disa-
ble dina ccordance with the perso nint he
front-passenge rs eatR
the front-passenge rs eat has been moved
back as far back as possible. R
the perso niss eated correctly.
Make sure ,b oth before and during the jour-
ney, that the status of the front-passenger
front air bag is correct.
G WARNING
If you secure ac hild in ar earward-facing child
restraint system on the front-passenge rs eat
and the PASSENGER AIR BAG OFF indicator
lamp is off, the front-passenge rf ront air bag
can deploy in the event of an accident. The
child coul dbes truck by the air bag .T his poses
an increased risk of injury or even fatal injury.
Make sure that the front-passenge rf ront air
bag has been deactivated. The PASSENGER
AIR BAG OFF indicator lamp must be lit.
NEVER use ar earward-facing child restraint
on as eat protected by an ACTIVE FRONT AIR-
BAG in front of it; DEATH or SERIOUS INJURY
to the child can occur.
If the PASSENGER AIR BAG OFF indicator lamp
stays off, do not instal lar earward-facing child
restraint system on the front-passenge rs eat.
You can find more information on OCS under
"Problems with the Occupant Classification Sys-
tem" ( Y
pag e4 9). G WARNING
If you secure ac hild in af orward-facing child
restraint system on the front-passenge rs eat
and you position the front-passenge rs eat too
close to the dashboard, in the event of an
accident, the child could: R
come into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example R
be struck by the air bag if the PASSENGER
AIR BAG OFF indicator lamp is off
This poses an increased risk of injury or even
fatal injury.
Move the front-passenge rs eat as far back as
possible .A lways make sure that the shoulder
bel ts trap is correctly routed from the vehicle
bel tg uide to the shoulde rb el tg uide on the
child restraint system. The shoulde rb el ts trap
must be routed forwards and downwards
from the vehicl eb el tg uide. Always observe
the child restraint system manufacturer's
installation instructions.
If OCS determines that: R
The front-passenge rs eat is unoccupied ,t he
PASSENGER AIR BAG OFF indicator lamp
lights up after the system self-test and
remains lit. This indicates that the front-
passenger front air bag is deactivated. R
The front-passenge rs eat is occupied by a
child of up to twelve months old, in as tandard
child restraint system, the PASSENGER AIR
BAG OFF indicator lamp lights up after the
system self-test and remains lit. This indi-
cates that the front-passenge rf ront air bag is
deactivated.
But even in the case of at welve-month-old
child ,inas tandard child restraint system, the
PASSENGER AIR BAG OFF indicator lamp can
go out after the system self-test. This indi-
cates that the front-passenge rf ront air bag is
activated. The result of the classification is
dependent on, among other factors, the child
restraint system and the child's stature. Make
sure that the conditions for ac orrect classi-
ficatio na re met. If the PASSENGER AIR BAG
OFF indicator lamp remains off, do not install
ac hild restraint system on the front-
pa ss
enger seat.Occupant safety 47
Safety Z

R
The front-passenger seat is occupied by a
person of smaller stature (e.g. at eenager or
small adult), the PASSENGER AIR BAG OFF
indicator lamp lights up and remains lit after
the system self-test depending on the result
of the classification or, alternatively, goes out. -
If the PASSENGER AIR BAG OFF indicator
lamp is off, move the front-passenger seat
as far back as possible. -
If the PASSENGER AIR BAG OFF indicator
lamp is lit, ap erson of smaller stature
should not use the front-passenger seat. R
The front-passenger seat is occupied by an
adult or ap erson of adult stature, the
PASSENGER AIR BAG OFF indicator lamp
goes out after the system self-test. This indi-
cates that the front-passenger front air bag is
activated.
If children are traveling in the vehicle, be sure to
observe the notes on "Children in the vehicle"
( Y
page 53).
When the Occupant Classification System
(OCS) is malfunctioning, the red u restraint
system warning lamp on the instrument cluster
and the PASSENGER AIR BAG OFF indicator
lamp light up simultaneously. The front-
passenger front air bag is deactivated in this
case and does not deploy during an accident.
Have the Occupant Classification System (OCS)
checked and repaired immediately at aq ualified
specialist workshop. Mercedes-Benz recom-
mends that you use an authorized Mercedes-
Benz Center for this purpose.
If the front-passenger seat, the seat cover or the
seat cushion are damaged, have the necessary
repair work carried out at aq ualified specialist
workshop. Mercedes-Benz recommends that
you use an authorized Mercedes-Benz Center
for this purpose.
For safety reasons, Mercedes-Benz recom-
mends that you only use seat accessories that
have been approved by Mercedes-Benz.
If the driver's air bag deploys, this does not
mean that the front-passenger front air bag will
also deploy. The Occupant Classification Sys-
tem (OCS) categorizes the occupant on the
front-passenger seat. Dependin gont hat result,
the front-passenger front air bag is either ena-
bled or deactivated. System self-test
G DANGER
If both the PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps do
not light up during the system self-test, the
system is malfunctioning. The front-
passenger front air bag might be triggered
unintentionally or might not be triggered at all
in the event of an accident with high deceler-
ation. This poses an increased risk of injury or
even fatal injury.
In this case the front-passenger seat may not
be used. Do not install ac hild restraint system
on the front-passenger seat. Have the Occu-
pant Classification System (OCS) checked
and repaired immediately at aq ualified spe-
cialist workshop.
G WARNING
If the PASSENGER AIR BAG OFF indicator
lamp remains lit after the system self-test, the
front-passenger front air bag is disabled. It will
not be deployed in the event of an accident .I n
this case, the front-passenger front air bag
cannot perform its intended protective func-
tion, e.g. when ap erson is seated in the front-
passenger seat.
That person could, for example, come into
contact with the vehicle's interior, especially
if the person is sittin gt oo close to the dash-
board. This poses an increased risk of injury or
even fatal injury.
When the front-passenger seat is occupied,
alway se nsure that: R
the classification of the person in the front-
passenger seat is correc ta nd the front-
passenger front air bag is enabled or disa-
bled in accordanc ew ith the person in the
front-passenger seat R
the person is seated properly with ac or-
rectly fastened seatbelt R
the front-passenger seat has been moved
as far back as possible
If the PASSENGER AIR BAG OFF indicator
lamp remains lit when it should not ,t he front-48
Occupant safety
Safety

passenger seat may not be used. Do not
install ac hild restraint system on the front-
passenger seat. Have the Occupant Classifi-
cation System (OCS) checked and repaired
immediately at aq ualified specialist work-
shop.
G WARNING
Objects between the seat surface and the
child restraint system could affect OCS oper-
ation. This could result in the front-passenger
air bag not functioning as intended during an
accident. This poses an increased risk of
injury or even fatal injury.
Do not place any objects between the seat
surface and the child restraint system. The
entire base of the child restraint system must
always rest on the seat cushion of the front-
passenger seat. The backrest of the forward- facin gc hild restraint system must, as far as
possible, be resting on the backrest of the
front-passenger seat. Always comply with the
child restraint system manufacturer's instal-
lation instructions.
After the system self-test, the PASSENGER AIR
BA GO FF or PASSENGER AIR BA GONi ndicator
lamp displays the status of the front-passenger
fron ta ir bag ( Y
page 46). If the front-passenger
fron ta ir bag is enabled, the PASSENGER AIR
BA GONi ndicator lamp lights up for 60 seconds
and then goes out.
If the PASSENGER AIR BA GONi ndicator lamp is
off, only the PASSENGER AIR BA GO FF indicator
lamp shows the status of the front-passenger
fron ta ir bag. The PASSENGER AIR BA GO FF
indicator lamp may be lit continuously or be off.
For more information about the OCS, see "Prob-
lems with the Occupant Classification System"
( Y
page 49).
Problems with the Occupant Classification System (OCS) Be sure to observe the notes on "System self-test" ( Y
page 48).Occupant safety 49
Safety Z

Problem
Possible causes/consequences and P Solutions
The PASSENGER AIR
BAG OFF indicator lamp
lights up and remains lit,
even though the front-
passenger seat is occu-
pied by an adult or ap er-
son of as tature corre-
sponding to that of an
adult. The classification of the person on the front-passenger seat is incor-
rect. X
Make sure the condition sf or ac orrect classification of the person
on the front-passenger seat are met ( Y
page 46).X
If the PASSENGER AIR BAG OFF indicator lamp remains lit, the front-
passenger seat may not be used. X
Have OCS checked as soon as possible at an authorized Mercedes-
Benz Center.
The PASSENGER AIR
BAG OFF indicator lamp
does not light up and/or
does not stay on.
The front-passenger seat
is: R
unoccupied R
occupied by the
weight of ac hild up to
twelve months old in a
child restraint system OCS is malfunctioning. X
Make sure there is nothin gb etween the seat cushion and the child
seat. X
Make sure that the entire base of the child restraint system rests on
the seat cushion of the front-passenger seat. The backrest of the
forward-facing child restraint system must lie as flat as possible
against the backrest of the front-passenger seat. If necessary,
adjust the position of the front-passenger seat. X
When installing the child restraint system, make sure that the seat
belt is tight. Do not pull the seat belt tight using the front-passenger
seat adjustment .T his could result in the seat belt and the child
restraint system being pulled too tightly. X
Check for correct installation of the child restraint system.
Make sure that the head restraint does not apply al oad to the child
restraint system. If necessary, adjust the head restraint accord-
ingly. X
Make sure that no object sa re applying additional weight onto the
seat. X
If the PASSENGER AIR BAG OFF indicator lamp remains off and/or
the PASSENGER AIR BAG ON indicator lamp lights up, do not install
ac hild restraint system on the front-passenger seat. X
Have OCS checked as soon as possible at an authorized Mercedes-
Benz Center.
Deployment of Emergency Tensioning
Devices and air bags
Important safety notes
G WARNING
The air bag parts are hot after an air bag has
been deployed. There is ar isk of injury.
Do not touch the air bag parts. Have a
deploye da ir bag replaced at aq ualified spe-
cialist workshop as soon as possible. G WARNING
Ad eploye da ir bag no longer offers any pro-
tection and cannot provide the intended pro-
tection in an accident. There is an increased
risk of injury.
Have the vehicle towed to aq ualified special-
ist workshop in order to have ad eploye da ir
bag replaced.
For your own safety and that of your front
passenger, it is important that you have
deploye da ir bags replaced and faulty air bags
repaired. This will help to make sure the air bags50
Occupant safety
Safety

continu etop erform thei rp rotective function for
the vehicle occupants in the event of ac rash.
G WARNING
Emergency Tensioning Devices that have
deployed pyrotechnicall ya re no longer opera-
tiona la nd are unabl etop erform thei ri nten-
ded protective function. Thi sp oses an
increase dr is kofi njury or eve nf ata li njury.
Have pyrotechnicall yt riggere dE mergency
Tensioning Devices replaced immediatel yata
qualified specialist workshop.
An electri cm otor is used by PRE-SAFE ®
to trig-
ger the tightening of the sea tb el tinh az ardous
situations. Thi sp rocedure is reversible.
If Emergency Tensioning Devices are triggered
or ai rb ag sa re deployed, yo uw il lh ea rab an g,
and some powder may also be released .T he
u restraint system warning lamp lights up.
Only in rar ec ase sw il lt he bang affect your hear-
ing. The powder that is released generally does
not constitute ah ealth hazard ,b ut it may cause
short-term breathing difficulties in peopl ew it h
asthma or othe rr espiratory problems. Provided
it is saf etodos o, yo us houl dl ea ve the vehicle
immediatel yoro pe nt he window in order to pre-
vent breathing difficulties.
Air bags and pyrotechnic Emergency Tensioning
Devices (ETDs) contai np erchlorate material,
which may require specia lh an dling and regard
for the environment. National guidelines must
be observe dd ur ing disposal .InC alif ornia, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm .
Metho dofo perationDuring the firs ts tag eofac ollision, the restraint
system control uni te valuates important physi-
cal data relating to vehicle deceleration or accel-
eration, such as: R
duration R
direction R
intensity
Base dont he evaluation of this data, the
restraint system control uni tt riggers the Emer-
gency Tensioning Devices during af ronta lo r
rea rc ollision. An Emergency Tensioning Device can only be
triggered, if: R
the ignition is switched on R
the components of the restraint system are
operational .Y ou can find further information
under "Restraint system warning lamp"
( Y
page 38) R
the sea tb el tb uc kle tongu eh as engaged in
the bel tb uc kle of the respectiv es eat
If the restraint system control uni td etects a
more severe accident, further components of
the restraint system are activate di ndepend-
ently of each othe rinc ertain fronta lc ollision
situations: R
Front ai rb ag sasw el lasd river' sa nd front-
passenger knee bags
The front-passenger front ai rb ag is activate do r
deactivated depending on the person on the
front-passenger seat. The front-passenger front
ai rb ag can only deploy in an accident if the
PASSENGER AIR BAG OFF indicator lamp is off.
Observe the information on the PASSENGER AIR
BAG indicator lamps ( Y
page 39).
You rv ehicle ha st wo-stage front ai rb ag s. In the
firs td eployment stage, the front ai rb ag is filled
with propellant gas. The front ai rb ag is fully
deployed with the maximum amount of prop el-
l
ant ga sifas econd deployment threshol di s
reached within af ew milliseconds.
The activation threshol doft he Emergency Ten-
sioning Devices and the ai rb ag sisd etermined
by evaluating the rate of vehicle deceleration or
acceleration which occurs at variou sp oints in
the vehicle .T hi sp rocess is pre-emptive in
nature. Deployment shoul dt ake place in good
time at the star toft he collision.
The rate of vehicle deceleration or acceleration
and the direction of the force are essentially
determine db y: R
the distribution of force sd ur ing the collisionR
the collision angle R
the deformation characteristics of the vehicle R
the characteristics of the object with which
the vehicle ha sc ollided
Factor sw hich can only be see na nd measured
afte rac ollision ha so ccurred do not play ad eci-
siv er ol eint he deployment of an ai rb ag .N or do
they provid eani ndication of ai rb ag deploy-
ment.
The vehicle can be deforme dc onsiderably ,w it h-
ou tana ir ba gb eing deployed. Thi sist he case if
only parts which are relativel ye as il yd eformedOccupan ts afety 51
Safety Z