2016 MERCEDES-BENZ S-COUPE key battery

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

Starting procedure with the Start/Stop
button
The Start/Stop button can be used to start
the vehicle manually without inserting the
SmartKey into the ignition lock. The Start/
Stop button must be inserted in the ignition
lock and the SmartKey must be in the vehicle.
This mode for starting the engine operates
independently of the ECO start/stop auto-
matic engine start function.
You can start the engine if a valid SmartKey is
in the vehicle. Always take the SmartKey with
you when leaving the vehicle, even if you only leave it for a short time. Pay attention to the
important safety notes.
XDepress the brake pedal and keep it
depressed.
XPress the Start/Stop button once
(
Ypage 151).
The engine starts.
Starting procedure via smartphone
Observe the important safety notes on start-
ing the engine (
Ypage 153).
You can also start your engine via your smart-
phone from outside the vehicle. In this case,
the previously selected climate control set-
ting is activated. In this way you can cool or
heat the interior of the vehicle before starting
the journey.
Only start the engine via your smartphone if it
is safe to start and run the engine where your
vehicle is parked.
Observe the legal stipulations in the area
where your vehicle is parked. Engine start via
smartphone may be limited to certain coun-
tries or regions.
You can execute a maximum of two consec-
utive starting attempts via your smartphone.
Once you have started the engine, you can
switch the engine off via your smartphone at
any time. You can only start the engine via your smart-
phone if:
Rthe SmartKey or the Start/Stop button is
not inserted in the ignition lock
Rpark position Pis selected
Rthe accelerator pedal is not depressed
Rthe anti-theft alarm system is not activated
Rthe panic alarm is deactivated
Rthe hazard warning lamps are switched off
Rthe hood is closed.
Rthe doors are closed and locked
Rthe windows and sliding sunroof are closed
Also make sure that:
Rthe fuel tank is filled sufficiently
Rthe starter battery is sufficiently charged
GWARNING
Limbs could be crushed or trapped if the
engine is started unintentionally during ser-
vice or maintenance work. There is a risk of
injury.
Always secure the engine against uninten-
tional starting before carrying out mainte-
nance or repair work.
Make sure that the engine cannot be started
via your smartphone before carrying out
maintenance or repairs. You can prevent an
engine start via your smartphone, for exam-
ple, if you:
Rswitch on the hazard warning lamps
Rdo not lock the doors
Ropen the hood
Pulling away
General notes
GWARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is
a risk of an accident.
154Driving
Driving and parking

The ECO start/stop function is activated
whenever you switch on the engine using the
SmartKey or the Start/Stop button.
If the engine has been switched off automat-ically by the ECO start/stop function, the
è ECO symbol is shown in the multifunc-
tion display.
The ECO start/stop function is only available
in drive program E(drive program Con
Mercedes-AMG vehicles).
Automatic engine switch-off
If the vehicle is braked to a standstill in Dor N,
the ECO start/stop function switches off the
engine automatically.
The ECO start/stop function is operational
when:
Rthe indicator lamp in the ECO button is lit
green.
Rthe outside temperature is within the range
that is suitable for the system.
Rthe engine is at normal operating temper-
ature.
Rthe set temperature for the vehicle interior
has been reached.
Rthe battery is sufficiently charged.
Rthe system detects that the windshield is
not fogged up when the air-conditioning
system is switched on.
Rthe hood is closed.
Rthe driver's door is closed and the driver's
seat belt is fastened.
All of the vehicle's systems remain active
when the engine is stopped automatically.
The HOLD function can be activated if the
engine has been switched off automatically. It
is then not necessary to continue applying the
brakes during the automatic stop phase.
When you depress the accelerator pedal, the
engine starts automatically and the braking
effect of the HOLD function is deactivated.
All vehicles (except Mercedes-AMG vehi-
cles): automatic engine switch-off can take place a maximum of four times in a row (initial
stop, then three subsequent stops).
Mercedes-AMG vehicles:
the number of
consecutive automatic engine switch-offs is
unlimited.
Automatic engine start
The engine starts automatically if:
Ryou switch off the ECO start/stop function
by pressing the ECO button
Ryou switch to drive program Sor M
Rin transmission position Dor Nthe brake
pedal is released and the HOLD function is
not active
Ryou depress the accelerator pedal
Ryou engage reverse gear R
Ryou move the transmission out of position
P
Ryou unfasten your seat belt or open the
driver's door
Rthe vehicle starts to roll
Rthe brake system requires this
Rthe temperature in the vehicle interior devi-
ates from the set range
Rthe system detects moisture on the wind-
shield when the air-conditioning system is
switched on
Rthe battery's condition of charge is too low
Shifting the transmission to position Pdoes
not start the engine.
156Driving
Driving and parking

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

Problems with fuel and the fuel tank
ProblemPossible causes/consequences andMSolutions
Fuel is leaking from the
vehicle.GWARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire.
XApply the electric parking brake.
XSwitch off the engine.
XOpen the driver's door.
The on-board electronics now have status 0. This is the same as
the SmartKey having been removed.
or, if the SmartKey is inserted in the ignition lock:
XRemove the SmartKey from the ignition lock.
XDo not restart the engine under any circumstances.
XConsult a qualified specialist workshop.
The fuel filler flap can-
not be opened.The fuel filler flap is not unlocked.
XUnlock the vehicle (Ypage 83).
The SmartKey battery is discharged or nearly discharged.
XUnlock the vehicle using the mechanical key (Ypage 85).
The fuel filler flap is unlocked, but the opening mechanism is jam-
med.
XConsult a qualified specialist workshop.
Parking
Important safety notes
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstart the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
170Parking
Driving and parking

Display messagesPossible causes/consequences andMSolutions
Â
ReplaceKeyBattery
The SmartKey battery is discharged.
XChange th ebattery (Ypage 86) .
Â
Don't Forget You r
Key
The SmartKey is notin th eignition lock. You hav eopened th e
driver's doo rwit hth eengin eswitched off.
This display message is displayed in th emultifunction display fo r a
maximum of 60 seconds and is simply areminder .
XTaketh eSmartKey wit hyou when you leav eth evehicle.
Â
Key Not Detected
(whit edisplay mes -
sage )
The SmartKey is currentl yundetected.
XChange th elocation of th eSmartKey in th evehicle.
If th eSmartKey still canno tbe detected:
XInser tth eSmartKey into th eignition loc kand tur nit to th e
desire dposition .
Â
Key Not Detected
(reddisplay message )
The SmartKey is no tin th evehicle.
A warnin gtone also sounds.
If th eengin eis switched off, you can no longer loc kth evehicl e
centrall yor start th eengine.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 170).
XLocate th eSmartKey.
XPress aon thesteerin gwhee lto confirm th edisplay mes -
sage .
Becaus ethere is interferenc efrom astron gsource of radi owaves,
th eke yis no tdetecte dwhils tth eengin eis running .
A warnin gtone also sounds.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 170).
XInsertth eSmartKey into th eignition loc kand bring into ke y
mode.
Â
Remove'Start 'But‐
ton and Insert Key
The SmartKey is continually undetected.
The SmartKey detection function has atemporar ymalfunction or
is faulty. Awarnin gtone also sounds.
XInser tth eSmartKey into th eignition loc kand tur nit to th e
desire dposition .
XVisitaqualified specialist workshop .
284Display messages
On-board computer and displays

In addition, flammable materials can ignite if:
Rthe hot cigarette lighter falls
Ra child holds the hot cigarette lighter to
objects, for example
There is a risk of fire and injury.
Always hold the cigarette lighter by the knob.
Always make sure that the cigarette lighter is
out of reach of children. Never leave children
unsupervised in the vehicle.
Your attention must always be focused on the
traffic conditions. Only use the cigarette
lighter when road and traffic conditions per-
mit.
Cigarette lighter in the front compart-
ment
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
XTo open: briefly press marking =.
Stowage compartment ;opens.
XPress in cigarette lighter :.
Cigarette lighter :will pop out automati-
cally when the heating element is red-hot.
XTo close: press stowage compartment ;
closed until it locks.
12 V sockets
General notes
XTurn the SmartKey to position 1in the igni-
tion lock (
Ypage 151). The sockets can be used for accessories with
a maximum draw of 180 W (15A). Accesso-
rie sinclude suc hitem sas charger sfo rmobile
phones.
If you use th esockets fo rlon gperiod swhe n
th eengin eis switched off, th ebattery may
discharge.
An emergency cut-out ensures that th eon -
boar dvoltage doe sno tdrop to olow. If th eon -
boar dvoltage is to olow, th epower to th e
sockets is automatically cut .Thi sensures
that ther eis sufficien tpower to start th e
engine.
Socket in th efront-co mpartment center
console
XTo open: briefly press marking =.
Stowage compartment ;opens.
XLift up the cover of socket :.
XTo close:press stowage compartment ;
closed until it locks.
Socket in the rear compartment
Features307
Stowag ean d features
Z