warning MERCEDES-BENZ SLC 2017 Workshop Manual

Correct driver's seat position
G WARNING
You coul dl ose control of your vehicle if you do
th ef ollowin gw hile driving:R
adjust th ed river' ss eat ,h ead restraint,
steering wheel or mirrors R
fasten th es eat belt
Ther eisar is kofana ccident.
Adjust th ed river' ss eat ,h ead restraint ,s te er-
ing wheel and mirror and fasten your seat belt
before starting th ee ng ine.
X
Observ et he safety guideline sons eat adjust-
men t( Y
page 82).X
Mak es ure that seat

The seats can still be adjusted when there is no
SmartKey in the ignition lock.
G WARNING
When you adjust as eat, you or other vehicle
occupant sc ould become trapped, e.g. on the
seat guide rail. There is ar isk of injury.
Make sure when adjusting as eat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
( Y
page 42) and "Children in the vehicle"
( Y
page 51).
G WARNING
If the driver's seat is not engaged, it could
move unexpectedly while the vehicle is in
motion .T his could cause you to lose control of
the vehicle. There is ar isk of an accident.
Always make sure that the driver's seat is
engaged before starting the vehicle.
G WARNING
If you adjust the seat height carelessly, you or
other vehicle occupant sc ould be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment button sa nd become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustmen ts ys-
tem.
G WARNING
If the head restraints are not installed or not
adjusted correctly, they cannot provide pro-
tection as intended. There is an increased risk
of injury in the head and neck area, e.g. in the
event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level. G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steerin gw heel or mirrors R
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine.
! To avoid damage to the seats and the seat
heating, observe the following information: R
keep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible. R
if the seat covers are damp or wet, do not
switch on the seat heating. The seat heat-
ing should also not be used to dry the seats. R
clean the seat covers as recommended;
see the "Interior care" section. R
do not transport heavy loads on the seats.
Do not place sharp object sont he seat
cushions, e.g. knives, nails or tools. The
seats should only be occupied by passen-
gers, if possible. R
when the seat heating is in operation, do
not cover the seats with insulating materi-
als, e.g. blankets ,c oats, bags, seat covers,
child seats or booster seats.
! Make sure that there are no object sint he
footwell under or behind the seats when mov-
ing the seats back. There is ar isk that the
seats and/or the object sc ould be damaged.
i The head restraints are equipped with the
NECK-PRO system ( Y
page 50). For this rea-
son, it is not possible to remove the head
restraints from the seats.
For more information, contact aq ualified spe-
cialist workshop. Seats 83
Seats, steering wheel and mirrors 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

X
Press button C repeatedly until the desired
heating level is set. X
To switch off: press button C repeatedly
until all the indicator lamps go out.
i The blower continues runnin gf or seven sec-
onds to cool down the heating elements.
i If the battery voltage is too low, AIRSCARF
may switch off.
Problems with AIRSCARF AIRSCARF has switched off prematurely or will
not switch on. The vehicle's electrical system
voltage is too low because too many electrical
consumers are switched on. X
Switc ho ff electrical consumers that you do
not need, such as the rear window defroster
or interior lighting. X
Switc honA IRSCARF again.
Steering wheel
Important safety notes
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steerin gw heel or mirrorsR
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine.
G WARNING
Children could injure themselves if they
adjust the steerin gw heel. There is ar isk of
injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The electrically adjustable steerin gw heel can
still be adjusted when there is no SmartKey in
the ignition lock. Adjusting the steering wheel man-
ually
G WARNING
If the steerin gw heel is unlocked while the
vehicle is in motion ,itc ould change position
unexpectedly. This could cause you to lose
control of the vehicle. There is ar isk of an
accident.
Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
C
Release lever D
Adjust st he steerin gw heel height

Position of the steering wheel when the
EASY-ENTRY/EXIT featur eisa ctiveThe steering wheel swings upwards when you: R
remove the SmartKey from the ignition lock R
open the driver's door with KEYLESS-GO in
position 1R
open the driver's door and the SmartKey is in
position 0 or 1 in the ignition lock
i The steering wheel only moves upwards if it
has not already reached the upper end stop.
Position of the steering wheel for driv-
ing The steering wheel is moved to the last selected
position when: R
the driver's door is closed R
you insert the SmartKey into the ignition lock
or R
you press the Start/Stop button once on vehi-
cles with KEYLESS-GO
When you close the driver's door with the igni-
tion switched on, the steering wheel is also
automatically moved to the previously set posi-
tion.
The last position of the steering wheel is stored
when you switch off the ignition or when you
store the settin gw ith the memory function
( Y
page 91).
Crash-responsive EASY-EXIT feature If the crash-responsive EASY-EXIT feature is trig-
gered in an accident, the steering column will
move upwards when the driver's door is opened.
This occurs irrespective of the position of the
SmartKey in the ignition lock. This makes it eas-
ier to exit the vehicle and rescue the occupants.
The crash-responsive EASY-EXIT feature is only
operational if the EASY-EXIT/ENTRY feature is
activated in the on-board computer
( Y
page 174). Mirrors
Rear-view mirror X
Anti-glare mode: flick anti-glare lever C for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, head restraint ,s teer-
ing wheel and mirror and fasten your seat belt
before startin gt he engine.
G WARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
object sa re actually closer than they appear.
This means that you could misjudge the dis-
tance from road users traveling behind, e.g.
when changing lane. There is ar isk of an acci-
dent.
For this reason, always make sure of the
actual distance from the road users traveling
behind by glancing over your shoulder.88
Mirrors
Seats, steering whee la nd mirrors

The daytime runnin gl amps improve the visibility
of your vehicle during the day. To do this, the
daytime runnin gl amps function must be
switched on using the on-board computer
( Y
page 172).
If the engine is runnin ga nd you turn the light
switch to ` or X ,t he manual settings
take precedenc eo ver the daytime running
lamps.
Low-beam headlamps
G WARNING
When the light switch is set to X ,t he low-
beam headlamps may not be switched on
automatically if there is fog, snow or other
causes of poor visibility due to the weather
conditions such as spray. There is ar isk of an
accident.
In such situations, turn the light switch to
X .
Even if the light sensor does not detect that it is
dark, the parking lamps and low-beam head-
lamps switch on when the ignition is switched on
and the light switch is set to the X position.
This is ap articularly useful function in the event
of rain and fog. X
To switch on the low-beam headlamps:
turn the SmartKey in the ignition lock to posi-
tion 2 or start the engine.X
Turn the light switch to X .
The green X indicator lamp in the instru-
ment cluster lights up.
Rear fog lamp
The rear fog lamp improves visibility of your
vehicle for the traffic behind in the event of thick
fog. Please take not eoft he country-specific
regulations for the use of rear fog lamps. X
To switch on the rear fog lamps: turn the
SmartKey to position 2 in the ignition lock or
start the engine. X
Turn the light switch to X or X .X
Press the ^ button.
The yellow ^ indicator lamp in the instru-
ment cluster lights up. X
To switch off the rear fog lamp: press the
^ button.
The yellow ^ indicator lamp in the instru-
ment cluster goes out. Parking lamps
! If the battery charge is very low, the parking
lamps or standin gl amps are automatically
switched off to enable the next engine start.
Always park your vehicle safely and suffi-
ciently lit according to legal standards. Avoid
using the parking lamps ` over ap eriod of
several hours. If possible, switch on the right-
hand d or left-hand c standin gl amp.X
To switch on: turn the light switch to ` .
The green ` indicator lamp in the instru-
ment cluster lights up.
Standing lamps Switching on the standin gl amps ensures the
corresponding side of the vehicle is illuminated. X
To switch on the standing lamps: the
SmartKey is not in the ignition lock or it is in
position 0 . X
Turn the light switch to c (left-han ds ide of
the vehicle) or d (right-hand side of the
vehicle).
Combination switch
C
High-beam headlamps D
Turn signal, right

X
To switc hont he high-beam headlamps:
turn the light switch to X or X .X
Press the combinatio ns wi tch beyond the
pressure point in the direction of arrow C .
In the X position, the high-bea mh ead-
lamps are onl ys wi tched on when it is dark and
the engine is running.
The blue W indicator lamp in the instru-
ment cluster lights up when the high-beam
headlamps are switched on. X
To switc ho ff the high-beam headlamps:
move the combinatio ns wi tch back to its nor-
ma lp osition.
The blue W indicator lamp in the instru-
ment cluster goe so ut .
Hazard warning lamps
X
To switc hont he hazard warning lamps:
press button C .
All turn signals flash. If yo un ow switch on a
turn signa lu si ng the combinatio ns wi tch ,o nly
the turn signa ll am pont he corresponding
side of the vehicl ew il lf lash.X
To switc ho ff the hazard warning lamps:
press button C .
The hazard warning lamps automaticall ys wi tch
on if: R
an ai rb ag is deployed orR
the vehicl ed ec elerates rapidly from as peed
of above 45 mph (70 km/h )a nd come stoa
standstill
The hazard warning lamps switch off automati-
cally if the vehicl er eache sas peed of above
6m ph (10 km/h )a gain afte raf ul lb rake appli-
cation.
i The hazard warning lamps stil lo pe rate if the
ignition is switched off. Cornerin gl ig ht functionThe cornering light functio ni mprove st he illu-
minatio noft he roa do ve raw id ea ngle in the
direction yo ua re turning, enabling better visi-
bility in tight bends, for example. The cornering
light functio nc an onl ybea ctivate dw he nt he
low-bea mh eadlamps are switched on.
Active: R
if yo ua re driving at speed sb elow 25 mph
(40 km/h )a nd switch on the turn signa lo r
turn the steering wheel R
if yo ua re driving at speed sb et ween 25 mph
(40 km/h )a nd 45 mph (70 km/h )a nd turn
the steering wheel
The cornering lamp ma yr emai nl it for as hort
time ,b ut is automaticall ys wi tched off afte rn o
more tha nt hre em inutes.
Cornerin gl ig ht functio nw it ht raffi cc ir cle
function:
The cornering light functio ni sa ctivate donb ot h
side sb ef ore entering at raffic circle throug ha n
evaluation of the current GP Sp osition of the
vehicle. It remains active unti la fte rt he vehicle
ha sl ef tt he traffic circle .Int hi sw ay ,p edes trians
crossing the road, for example, are illuminated
by your vehicl eing oo dt ime.
Active light function The active light functio ni sas ys tem tha tm oves
the headlamps according to the steering move-
ments of the front wheels .Int hi sw ay ,r elevant
areas remai ni llum inated whil ed riving .T his
allows yo utoi de ntify pedestrians ,c yclists and
animals.
Active: when the lights are switched on.
Vehicles with Lane Keeping Assist: the active
light functio ne valuate st he course of the lane in
which yo ua re driving and pre-emptively con-
trol st he active light function.
Adaptiv eH ighbeam Assist
General notes
Yo uc an us et hi sf unctio ntos et the headlamps
to change between lo wb ea ma nd high beam
automatically. The system recognizes vehicles
with thei rl ig hts on, either approaching from the
opposite direction or traveling in front of yourExterior lighting 95
Lights and windshield wiper s Z

vehicle, and consequently switches the head-
lamp sf rom high bea mtol ow beam.
The system automatically adapts the low-beam
headlamp range depending on the distance to
the other vehicle. Once the system no longer
detects any other vehicles, it reactivates the
high-beam headlamps.
The system' so ptical sensor is located behind
the windshiel dn ear the overhea dc ontrol panel.
Important safety notes
G WARNING
Adaptive Highbeam Assist does not recognize
road users: R
who have no lights, e.g. pedestrians R
who have poor lighting, e.g. cyclists R
whos el ighting is blocked ,e .g. by ab arrier
On very rare occasions, Adaptive Highbeam
Assist may fail to recognize other road users
that have lights, or may recognize them too
late. In this, or in similar situations, the auto-
matic high-beam headlamp sw il ln ot be deac-
tivated or wil lbea ctivated regardless. There is
ar isk of an accident.
Always carefully observe the traffic conditions
and switch off the high-beam headlamp si n
good time.
Adaptive Highbeam Assist cannot take into
account road ,w eather or traffic conditions.
Adaptive Highbeam Assist is only an aid .Y ou are
responsible for adjusting the vehicle's lighting
to the prevailing light, visibility and traffic con-
ditions.
In particular, the detection of obstacles can be
restricted if there is: R
poor visibility, e.g. due to fog, heavy rain or
snow R
dirt on the sensors or the sensors are
obscured Switching Adaptive Highbeam Assist
on/off X
To switch on: turn the light switch to X .X
Press the combination switch beyond the
pressure point in the directio nofa rrow C .
The

i If you activate the residual heat function at
high temperatures, only the ventilation wil lb e
activated. The blower runs at mediu ms peed.X
To deactivate: press the K or V but-
ton.
The indicator lamp in the K or V button
goes out.
Residua lh eat is deactivated automatically:R
after approximately 30 minutes R
when the ignition is switched on R
if the battery voltage drops
Setting the air vents
Important safety notes
G WARNING
Very hot or very cold air can flow from the air
vents. This could resul tinb urns or frostbite in
the immediate vicinity of the air vents. There
is ar isk of injury.
Make sure that all vehicle occupants always
maintain as ufficient distance to the air out-
lets. If necessary ,r edirect the airflow to
another area of the vehicle interior.
G WARNING
When AIRSCARF is switched on, very hot air
can flow from the vents in the head restraints.
This could resul tinb urns in the immediate
vicinity of the air vents. There is ar isk of injury.
Reduce the heater outpu tb efore it becomes
too hot.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes: R
keep the air inlet grill eont he hood and in the
engine compartment on the front-passenger
side free of blockages, such as ice, snow or
leaves. R
never cover the air vents or air intake grilles in
the vehicle interior.
i You can move the adjusters for the air vents
verticall yorh orizontally to set the direction of
the airflow. i For optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position.
Setting the center air vents X
To open the center air vents: turn the
adjuster in one of center air vents C counter-
clockwise. X
To close the center air vents: turn the
adjuster in one of center air vents C clock-
wise until it engages.
Setting the side air vents
C
Side window defroster vent
D
Side air vent X
To open as ide air vent: turn the adjuster in
the side air vent D to the left.X
To close as ide air vent: turn the adjuster in
the side air vent D to the right until it
engages.112
Setting the air vents
Climate control

Setting the blower outpu toft he AIR-
SCARF vents
G WARNING
When AIRSCARF is switched on, very hot air
can flow from the vent sint he 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 before it becomes
too hot.
You can adjust the blower output of AIRSCARF
vents C using the AIRSCARF button
( Y
page 85). Setting the air vents 113
Climat ec ontrol Z