2016 MERCEDES-BENZ S-COUPE light

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andMSolutions
The indicator lamp in
theÁ button
flashes three times or
remains off. Cooling
with air dehumidifica-
tion can also no longer
be switched on using
COMAND (see the sep-
arate operating instruc-
tions).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.
Setting climate control to automatic
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XSet the desired temperature using the
w rocker switch.
or
XSet the desired temperature using
COMAND (see the separate operating
instructions).
XTo activate: press rocker switch Ãup
or down.
The indicator lamp in the Ãrocker
switch lights up.
XTo switch to manual operation: press the
K rocker switch up or down.
or
XSet the airflow using COMAND (see the
separate operating instructions).
or
XSet the air distribution using COMAND (see
the separate operating instructions).
The indicator lamp in rocker switch Ã
goes out.
In automatic mode, if you adjust the airflow or
air distribution manually, the indicator lamp
on the Ãrocker switch goes out. The func-
tion which has not been changed manually,
however, continues to be controlled automat-
ically. When the manually set function
Operating the climate control systems139
Climate control

switches back to automatic mode, the indi-
cator lamp on theÃrocker switch lights
up again.
Adjusting the climate mode settings
In automatic mode you can select the follow-
ing airflow settings for the driver's and front- passenger areas:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draught-free setting
XTo set:set the climate mode using
COMAND (see the separate operating
instructions).
Setting the temperature
General notes
You can set the temperature separately for
the following areas:
Rfront footwells, left and right
Rdriver and front passenger area
Setting the temperature
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo increase or reduce: press thew
rocker switch up or down.
or
XSet the temperature using COMAND (see
the separate operating instructions).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
Setting the footwell temperature
The footwell temperature for the driver and
front passenger can be set separately using
COMAND (see the separate operating
instructions).
Setting the air distribution
Air distribution settings
¯ Directs air through the defroster vents
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
a Directs air through the defroster and
footwell vents
W Sets the air distribution to automatic
Setting the air distribution using
COMAND
The air distribution for the left and right sides
of the driver and front passenger area can be
adjusted using COMAND (see the separate
operating instructions).
140Operating the climate control systems
Climate control

Setting the airflow
General notes
You can select different airflow settings for
the driver's and front-passenger sides.
Setting the airflow
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo increase or reduce: press theK
rocker switch up or down.
or
XSet the airflow using COMAND (see the
separate operating instructions).
Activating or deactivating the syn-
chronization function
Climate control can be set centrally using the
synchronization function. The settings for
temperature, air distribution and airflow on
the driver's side are adopted for the front-
passenger side.
XTo activate/deactivate: activate or deac-
tivate the synchronization function using
COMAND (see the separate operating
instructions).
The synchronization function switches off, if
the settings for the front-passenger side are
changed.
Defrosting the windshield
You can use this function to defrost the wind-
shield or to clear a fogged up windshield or
front side windows on the inside.
Switch off the "Windshield defrosting" func-
tion as soon as the windshield is clear again.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo switch on: press the¬rocker
switch on the front control unit up or down.
The indicator lamp in the ¬rocker
switch 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
Rwindshield heating on
XTo deactivate:
press the¬rocker
switch up or down.
The indicator lamp in the ¬rocker
switch goes out. The previously selected
settings are restored. Air-recirculation
mode remains deactivated.
or
XPress the Ãrocker switch up or down.
or
XUse the trocker switch to call up the
COMAND climate control menu.
Defrosting the windows
Windows fogged up on the inside
XActivate the "Cooling with air dehumidifi-
cation" function with the Árocker
switch.
or
XActivate the "Cooling with air dehumidifi-
cation" function via COMAND (see the sep-
arate operating instructions).
XSwitch on automatic mode using the Ã
rocker switch.
XIf the windows continue to fog up, activate
the "Windshield defrosting" function using
the ¬ rocker switch. The windshield
heating is switched on.
iYou should only select this setting until
the windshield is clear again.
Operating the climate control systems141
Climate control

Windows fogged up on the outside
XActivate the windshield wipers.
XSwitch on automatic mode using theÃ
rocker switch.
iIf you clean the windows regularly, they
do not fog up so quickly.
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.
Activating or deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XPress the ¤rocker switch up or down.
The indicator lamp in the ¤rocker
switch lights up or goes out.
142Operating the climate control systems
Climate control

Problems with the rear window defroster
ProblemPossible causes/consequences andMSolutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated.The battery has not been sufficiently charged.
XSwitch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Switching air-recirculation mode
on/off
General notes
You can also temporarily deactivate the flow
of fresh air manually if unpleasant odors are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating or deactivating
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo activate: press thegrocker switch
up or down.
The indicator lamp in the grocker
switch lights up.
Air-recirculation mode is automatically acti-
vated at high levels of pollution or at high out-
side temperatures. The indicator lamp in the
g rocker switch is not lit when automatic
air-recirculation mode is activated. Outside
air is added after about 30 minutes.
XTo deactivate: press thegrocker
switch up or down.
The indicator lamp in the grocker
switch goes out. Air-recirculation mode deactivates automati-
cally:
Rafter approximately five minutes at outside
temperatures below approximately 41 ‡
(5 †)
Rafter approximately five minutes if cooling
with air dehumidification is deactivated
Rafter approximately 30 minutes at outside
temperatures above approximately 41 ‡
(5 †) if the "Cooling with air dehumidifica-
tion" function is activated
Switching the residual heat on or off
General notes
Once the engine is switched off, it is possible
to make use of the residual heat of the engine
to continue heating or ventilating the front
compartment of the vehicle for approximately
30 minutes.
The heating or ventilation time depends on
the temperature that has been set.
Activating or deactivating
XTurn the SmartKey to position 0in the igni-
tion lock or remove it (
Ypage 151).
XTo activate: press theÁrocker switch
up or down.
The indicator lamp in rocker switch Á
lights up.
The blower will run at a low speed regardless
of the airflow setting.
Operating the climate control systems143
Climate control

the case if you are not depressing the brake
pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
A check which periodically establishes a radio
connection between the vehicle and the
SmartKey determines whether a valid Smart-
Key is in the vehicle. This occurs, for example,when starting the engine.
To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in
the ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO (
Ypage 83).
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile
phone or another SmartKey.
Rwith metallic objects, e.g. coins or metal
foil.
Rinside metallic objects, e.g. a metal case.
This can affect the functionality of the Smart-
Key.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will not be able to start the engine with
the Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the but-
ton on the front doo
r (Ypage 89), you can
continue to start the engine with the Start/
Stop button.
The engine can be switched off while the vehi-
cle is in motion by pressing and holding the
Start/Stop button for three seconds. This
function operates independently of the ECO
start/stop automatic engine switch-off func-
tion. Key positions with the Start/Stop button
:Start/Stop button
;Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Further information on situations where
an indicator lamp either fails to go out after
starting the engine or lights up while driving
(
Ypage 287).
If Start/Stop button :has not yet been
pressed, this corresponds to the key being
removed from the ignition.
XTo switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can
now activate the windshield wipers, for
example.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when
in this position
XTo switch on the ignition: press Start/
Stop button :twice.
The ignition is switched on.
The ignition is switched off again if:
Ryou do not start the engine within
15 minutes when inthis position
Ryou press Start/Stop button :twice when
in this position.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when
in this position
152Driving
Dr iving an d parking

Deactivating or activating theECO
start/stop function
All vehicles (except Mercedes-AMG vehi-
cles)
XTo deactivate :press EC Obutto n:.
Indicator lamp ;goe sout .
XTo activate :press EC Obutto n:.
Indicator lamp ;lights up.
If indicator lamp ;is off, th eEC Ostart/sto p
function has been deactivated manually or as
th eresult of amalfunction .The engin ewill
then no tbe switched of fautomatically when
th evehicle stops .
If drive program Sor Mhas been selected, th e
EC Ostart/sto pfunction is always deactiva-
ted.
If you switch on th eEC Ostart/sto pfunction
whil edrive program Sis selected, th edrive
program automatically switches to E.
Mercedes-AMG vehicles
XTo deactivate :in drive program C,press
EC Obutto n:.
or
XSwitc hto drive program Sor M
(
Ypage 163).
Indicator lamp ;goe sout .
XTo activate :press EC Obutto n:.
Indicator lamp ;lights up.
If drive program Sor Mis active ,th eauto-
matic transmissio nswitches to drive pro -
gram C.
If indicator lamp ;is off, th eEC Ostart/sto p
function has been deactivated manually or as
th eresult of amalfunction .The engin ewill
then no tbe switched of fautomatically when
th evehicle stops .
If drive program Sor Mhas been selected, th e
EC Ostart/sto pfunction is always deactiva-
ted.
If you switch on th eEC Ostart/sto pfunction
whil edrive program Sis selected, th edrive
program automatically switches to C.
Driving157
Driving and parking
Z

Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start. The starter motor
can be heard.RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the SmartKey back to position 0in the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps in the instrument cluster go out.
XTry to start the engine again (Ypage 153). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 351).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not run-
ning smoothly and is
misfiring.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
XHave the cause rectified immediately at a qualified specialist
workshop.
The coolant tempera-
ture gauge shows a
value above 248 ‡
(120 †).The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 328). Observe the warning
notes as you do so and add coolant if necessary.
158Driving
Driving and parking