lock MERCEDES-BENZ SL-Class 2016 R231 Repair Manual

XTo switch on:turn the SmartKey in the
ignition lock to position 1or 2or start the
engine.
XPull the combination switch in the direction of arrow =.
Hazard warning lamps
XTo switch on the hazard warning lamps:
press button :.
All turn signals flash. If you now switch on a
turn signal using the combination switch,
only the turn signal lamp on the corre-
sponding side of the vehicle will flash.
XTo switch off the hazard warning lamps:
press button :.
The hazard warning lamps automatically
switch on if:
Ran air bag is deployed or
Rthe vehicle decelerates rapidly from a
speed of above 45 mph (70 km/h) and
comes to a standstill
The hazard warning lamps switch off auto-
matically if the vehicle reaches a speed of
above 6 mph (10 km/h) again after a full
brake application.
iThe hazard warning lamps still operate if
the ignition is switched off.
Cornering light function
The cornering light function improves the illu-
mination of the road over a wide angle in the
direction you are turning, enabling better vis-
ibility in tight bends, for example. The corner-
ing light function can only be activated when
the low-beam headlamps are switched on.
Active:
Rif you are driving at speeds below 25 mph
(40 km/h) and switch on the turn signal or
turn the steering wheel
Rif you are driving at speeds between
25 mph (40 km/h) and 45 mph (70 km/h)
and turn the steering wheel
The cornering lamp may remain lit for a short
time, but is automatically switched off after
no more than three minutes.
Active light function
The active light function is a system that
moves the headlamps according to the steer-
ing movements of the front wheels. In this
way, relevant areas remain illuminated while
126Exterior lighting
Lights and windshield wiper s

driving. This allows you to identify pedes-
trians, cyclists and animals.
Active:when the lights are switched on.
Adaptive Highbeam Assist
General notes
You can use this function to set the head-
lamps to change between low beam and high beam automatically. The system recognizes
vehicles with their lights on, either approach-
ing from the opposite direction or traveling in
front of your vehicle, and consequently
switches the headlamps from high beam to
low beam.
The system automatically adapts the low-
beam headlamp range depending on the dis-
tance to the other vehicle. Once the system
no longer detects any other vehicles, it reac-
tivates the high-beam headlamps.
The system's optical sensor is located behind
the windshield near the overhead control
panel.
Important safety notes
GWARNING
Adaptive Highbeam Assist does not recognize
road users:
Rwho have no lights, e.g. pedestrians
Rwho have poor lighting, e.g. cyclists
Rwhose lighting is blocked, e.g. by a barrier
In very rare cases, Adaptive Highbeam Assist
may fail to recognize other road users that
have lights, or may recognize them too late. In this or similar situations, the automatic high-
beam headlamps will not be deactivated or
activated regardless. There is a risk of an acci-
dent.
Always carefully observe the traffic conditions
and switch off the high-beam headlamps in
good time.
Adaptive Highbeam Assist cannot take into
account road, weather or traffic conditions.
Adaptive Highbeam Assist is only an aid. Youare responsible for adjusting the vehicle's
lighting to the prevailing light, visibility and
traffic conditions.
In particular, the detection of obstacles can
be restricted if there is:
Rpoor visibility, e.g. due to fog, heavy rain or
snow
Rdirt on the sensors or the sensors are
obscured
Exterior lighting127
Lights and windshield wipers
Z

Interior lighting control
General notes
In order to prevent the vehicle's battery from
disc harging, the interior lighting functions are
automatical lydeactivated after some time
unless the SmartKey is inposition 2in the
ignit ion lock.
Automatic interior lighting control
Overhead control panel
:
p Toswit ch the left-hand reading lamp
on/o ff
;c Toswit ch the interior lighting on
=| Toswit ch the interior lighting/auto-
mat icinterior lighting control off
?p To switch the right-hand reading
lamp on/o ff
AToswit ch the automat icinterior lighting
control on
XTo switch on: set the switch to center
position A.
XTo switch off: set the switch to the |
position.
The interior lighting automatically switches
on ifyou:
Runlock the vehicle
Ropen a door
Rremove the SmartKey from the ignit ion lock
The interior lightis activated for a short while
when the SmartKey is removed from the igni-
tion lock. You can activate th isdelayed switch-off using the on-board computer
(
Ypage 234).
Manual interior lighting control
XTo switch
the interi orlighti ng on: set the
switch to the cposition.
XTo switch the interi orlighti ng off: set the
switch to the |or (if the door isclosed)
to the center posit ion.
XTo switchthe reading lamps on/off:
press the pbutton.
Crash-responsive emergency lighting
The interior lighting isactivated automatical ly
if the vehicle isinvolved inan acc ident.
XTo switch off the crash-responsive
eme rgency lighti ng:press the hazard
warning lamp button.
or
XLock and then unlock the vehicle using the Sm artKey.
Replacing bulbs
GDANGER
Xenon bulbs carry ahigh voltage. You can get
an electric shock if you remove th ecover of
th eXenon bulb and touch th eelectrical con-
tacts .Ther eis aris kof fatal injury.
Never touch th epart sor th eelectrical con-
tacts of th eXenon bulb. Always hav ewor kon
th eXenon bulbs carrie dout at aqualified spe-
cialist workshop.
The front and rear lamps of your vehicle are
equipp edwith either Xenon or LED bulbs. Do
not replace the bulbs yourself. Contact a
qualif ied specialist workshop which has the
necessary specialist knowledge and tools to
carry out the work required.
Bulbs and lamps are an important aspect of
vehicle safety. You must therefore make sure
Replacing bulbs129
Lights and windshield wipers
Z

Replacing the wiper blades
Important safety notes
GWARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could be trapped by the wiper arm. There is a risk of
injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
!To avoid damaging the wiper blades,
make sure that you touch only the wiper
arm of the wiper.
!Never open the hood if a windshield wiper
arm has been folded away from the wind-
shield.
Never fold a windshield wiper arm without a
wiper blade back onto the windshield.
Hold the windshield wiper arm firmly when
you change the wiper blade. If you release
the windshield wiper arm without a wiper
blade and it falls onto the windshield, the
windshield may be damaged by the force of
the impact.
Mercedes-Benz recommends that you have
the wiper blades changed at a qualified
specialist workshop.
!Always position the windshield wiper
arms vertically before folding them away
from the windshield. By doing so, you will
avoid damage to the hood.
Changing the windshield wiper blades
Moving the wiper arm to a vertical posi-
tion
On vehicles without KEYLESS-GO:
XTurn the SmartKey to position 1or 2in the
ignition lock.
XSet the windshield wiper to position °.
XWhen the wiper arms have reached the ver-
tical position, turn the SmartKey to position
0 and remove it from the ignition lock.
XFold the wiper arm away from the wind-
shield until it engages.
On vehicles with KEYLESS-GO:
XSwitch off the engine.
XRemove your foot from the brake pedal.
XSet the windshield wiper to the °posi-
tion.
XPress the Start/Stop button repeatedly
until the windshield wiper starts.
XWhen the wiper arms have reached a ver-
tical position, press the Start/Stop button.
XFold the wiper arm away from the wind-
shield until it engages.
Removing a wiper blade
XTo bring the wiper blade into position to
be removed: hold the wiper arm firmly with
one hand. With the other hand, turn the
wiper blade in the direction of arrow =
beyond the point of resistance.
The wiper blade engages in the removal
position with an audible click.
XTo remove a wiper blade: firmly press
release knob ;and pull the wiper blade
upwards :.
Windshield wipers131
Lights and windshield wipers
Z

Problems with the windshield wipers
ProblemPossible causes/consequences andMSolutions
The windshield wipers
are jammed.Leaves or snow, for example, may be obstructing the windshield
wiper movement. The wiper motor has been deactivated.
XFor safety reasons, you should remove the SmartKey from the
ignition lock.
or
XSwitch off the engine using the Start/Stop button and open the driver's door.
XRemove the cause of the obstruction.
XSwitch the windshield wipers back on.
The windshield wipers
fail completely.The windshield wiper drive is malfunctioning.
XSelect another wiper speed on the combination switch.
XHave the windshield wipers checked at a qualified specialist
workshop.
Windshield wipers133
Lights and windshield wipers
Z

RUse the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side as well. The indi-
cator lamp in theábutton goes out.
RUse the residual heat function if you want to
heat or ventilate the vehicle interior when
the ignition is switched off. The residual
heat function can only be activated or deac-
tivated with the ignition switched off.
RVehicles with COMAND: if you change the
settings of the climate control system, the
climate status display appears for three
seconds at the bottom of the screen in the
COMAND display. See also the separate
COMAND operating instructions. You will
see the current settings of the various cli-
mate control functions.
ECO start/stop function
During automatic engine switch-off, the cli-
mate control only operates at a reduced capa-
city. If you require full climate control capa-
city, the ECO start/stop function can be
deactivated by pressing the ECO button
(
Ypage 156).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
General notes
When the climate control is switched off, the
air supply and air circulation are also
switched off. The windows could fog up.
Therefore, switch off climate control only
briefly
iActivate climate control primarily using
the à button (
Ypage 141).
Activating or deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to
automatic mode.
or
XPress the ^button.
The indicator lamp in the ^button goes
out. The previously selected settings are
restored.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
Switching cooling with air dehumidi-
fication on/off
General notes
If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi- cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can fog up more quickly. Therefore,
deactivate the cooling with air-dehumidifica-
tion function only briefly.
The "Cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a malfunc-
tion.
Operating the climate control systems139
Climate control

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andMSolutions
The indicator lamp in
the¿ button
flashes three times or
remains off. The "Cool-
ing with air dehumidifi-
cation" function cannot
be switched on.Cooling with air dehumidification has been deactivated due to a
malfunction.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic mode functions optimally
when the "Cooling with air dehumidification"
function is activated. If necessary, cooling
with air dehumidification can be deactivated.
If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can fog up more quickly. Therefore,
deactivate the cooling with air-dehumidifica-
tion function only briefly.
Automatic control
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow
are activated.
iWhen automatic mode is enabled, the cli-
mate mode can be selected (
Ypage 141).
XTo switch to manual mode: press the
_ button.
or
XPress the IorK button.
The indicator lamp in the Ãbutton goes
out.
Adjusting the climate mode settings
You can select the following climate mode
settings in automatic mode:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draft-free setting
Operating the climate control systems141
Climate control

Example:ñbutton
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XPress the Ãbutton.
XPress the ñbutton repeatedly until the
desired climate mode appears in the dis-
play.
Setting the temperature
Activating or deactivating
Different temperatures can be set for the
driver's and front-passenger sides.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTurn control :orD counter-clockwise or
clockwise.
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
iIf you turn controls :and Dcounter-
clockwise to the lowest temperature set-
ting, air-recirculation mode may activate automatically, depending on the outside
temperature.
Setting the air distribution
Activating or deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XPress the _button repeatedly until the
desired symbol appears in the display.
Air distribution settings
The following air distribution settings can be
selected:
P Directs air through the center and side
air vents
O Directs air through the footwell air
vents
S Directs air through the center, side and
footwell vents
¯ Directs air through the defroster vents
b Directs the airflow through the
defroster, center and side air vents
(Canada only)
a Directs air through the defroster and
footwell vents
_ Directs the airflow through the
defroster vents, the center and side air
vents as well as the footwell air vents
(Canada only)
iRegardless of the air distribution setting,
airflow is always directed through the side
142Operating the climate control systems
Climate control

air vents. The side air vents can only be
closed when the controls on the side air
vents are turned downwards.
Setting the airflow
Activating or deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo increase: press theKbutton.
XTo reduce: press theIbutton.
Switching the ZONE function on/off
XTo switch on: press theábutton.
The indicator lamp in the ábutton lights
up. The temperature setting for the driver's
side is not adopted for the front-passenger
side.
XTo switch off: press theábutton.
The indicator lamp in the ábutton goes
out. The temperature setting for the driv- er's side is adopted for the front-passenger
side.
Defrosting the windshield
General notes
Example :¬ button
You can use this function to defrost the wind-
shield or to defrost the inside of the wind-
shield and the side windows.
Switch off the "Windshield defrosting" func-
tion as soon as the windshield is clear again.
Switching the "windshield defrosting"
function on or off
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo switch on: press the¬button.
The indicator lamp in the ¬button lights
up.
The climate control system switches to the
following functions:
Rhigh airflow
Rhigh temperature
Rair distribution to the windshield and
front side windows
Rair-recirculation mode off
XTo switch off: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings are
Operating the climate control systems143
Climate control

restored. Air-recirculation mode remains
deactivated.
or
XPress the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
XTurn the temperature control on the cli-
mate control panel counter-clockwise or
clockwise.
Turn temperature control :orD counter-
clockwise or clockwise (
Ypage 137).
or
XPress the KorI button.
MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA.
MAX COOL is only operational when the
engine is running.
XTo activate: press theÙbutton.
The indicator lamp in the button lights up.
XTo deactivate: press theÙbutton.
The indicator lamp in the button goes out.
The previously selected settings are
restored.
When you activate MAX COOL, climate con-
trol switches to the following functions:
Rmaximum cooling
Rmaximum airflow
Rair-recirculation mode on
Defrosting the windows
Windows fogged up on the inside
XActivate the ¿cooling with air dehu-
midification function.
XActivate the Ãmode button.
XIf the windows continue to fog up, activate
the¬ "Windshield defrosting" function.
iYou should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XPress the _button repeatedly until the
P orO symbol appears in the dis-
play.
iYou should only select this setting until
the windshield is clear again.
Rear window defroster
General notes
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off.
144Operating the climate control systems
Climate control