stop start MERCEDES-BENZ S-COUPE 2016 Repair Manual

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gage is at the start of the bar display.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored. There is a risk of engine
damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions. Do not continue driving under any
circumstances.
XSecure the vehicle against rolling away (Ypage 170).
XConsult a qualified specialist workshop.
294Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked
or the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled sufficiently.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 170).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(
Ypage 328).
XIf you have to add coolant frequently, have the engine cooling system
checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by
snow, slush or ice.
XDo not start the engine again until the coolant temperature is below 257 ‡
(125 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in mountainous
terrain, and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running. A
warning tone also sounds.
The coolant temperature has exceeded 255 ‡ (124 †). The airflow to the
engine radiator may be blocked or the coolant level may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can
occur just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 170).
Warning and indicator lamps in the instrument cluster295
On-board computer and displays
Z

opening the cap, you could be scalded by hot
coolant spraying out. There is a risk of injury.Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
XPark the vehicle on a level surface.
Only check the coolant level when the vehi-
cle is on a level surface and the engine has
cooled down.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 151).
or
XPress Start/Stop button twice
(
Ypage 151).
XCheck the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
XTurn the SmartKey to position
0 (
Ypage 151) in the ignition lock.
or
XRemove Start/Stop button from ignition
lock (
Ypage 151).
XSlowly turn cap :half a turn counter-
clockwise and allow excess pressure to
escape.
XTurn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar
=in the filler
neck when warm, there is enough coolant
in expansion tank ;.
XIf necessary, add coolant that has been tes-
ted and approved by Mercedes-Benz.
XReplace cap:and turn it clockwise as far
as it will go.
For further information on coolant, see
(
Ypage 404).
Adding washer fluid to the windshield
washer system
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
XTo open: pull cap:upwards by the tab.
XPlace cap :on the edge of the filler neck
and engage in place.
Engine compartment329
Maintenance and care
Z

To prevent damage to the vehicle, deacti-
vate DISTRONIC PLUS and the HOLD func-tion in the following or other similar situa-
tions:
Rwhen towing the vehicle
Rin the car wash
!Never clean your vehicle in a Touchless
Automatic Car Wash as these use special
cleaning agents. These cleaning agents can
damage the paintwork or plastic parts.
!Make sure that:
Rthe side windows are fully closed.
Rthe ventilation/heating is switched off
(the OFF button has been pressed).
Rthe windshield wiper switch is at position
0.
Rthe 360° camera or rear view camera is
switched off.
The vehicle may otherwise be damaged.
!If the SmartKey is within the rear detec-
tion range of KEYLESS-GO, the following
situations, for example, could lead to the
unintentional opening of the trunk:
Rusing a car wash
Rusing a power washer
Make sure that the SmartKey is at least
10 ft (3 m) away from the vehicle.
!Make sure that the automatic transmis-
sion is in neutral position Nwhen washing
your vehicle in a tow-through car wash. The
vehicle may otherwise be damaged.
ROperating with the SmartKey:
Do not remove the SmartKey from the
ignition lock. Do not open the driver's
door when the engine is switched off or
at very low speeds. Otherwise, when in
transmission position Dor Rthe auto-
matic transmission will automatically
switch to park position Pand block the
wheels.
ROperating with the Start/Stop button:
Do not open the driver's door when the
engine is switched off or at very low speeds. Otherwise, when in transmission
position
Dor Rthe automatic transmis-
sion will automatically switch to park
position Pand block the wheels.
Observe the following to make sure that the
automatic transmission stays in position N
neutral:
Operating with the SmartKey:
XMake sure that the ignition is switched on.
XMake sure that the vehicle is stationary.
XDepress and hold the brake pedal.
XShift to neutral N.
XRelease the brake pedal.
XRelease the electric parking brake, if nec-
essary.
XSwitch off the ignition and leave the Smart-
Key in the ignition lock.
Operating with the Start/S top but
ton:
XMake sure that the ignition is switched on.
XMake sure that the vehicle is stationary.
XDepress and hold the brake pedal.
XEngage park positionP.
XRelease the brake pedal.
XRemove Start/Stop button from ignition
lock (
Ypage 151).
XInsert the SmartKey into the ignition lock.
XSwitch on the ignition.
XDepress and hold the brake pedal.
XShift to neutralN.
XRelease the brake pedal.
XRelease the electric parking brake, if nec-
essary.
XSwitch off the ignition and leave the Smart-
Key in the ignition lock.
You can wash the vehicle in an automatic car
wash from the very start.
If the vehicle is very dirty, pre-wash it before
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off
wax from the windshield and the wiper
blades. This will prevent smears and reduce
332Care
Maintenance and care

XSecure the vehicle against rolling away
(
Ypage 170).
XIf possible, bring the front wheels into the
straight-ahead position.
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.
XRemove the Start/Stop button from the
ignition lock (
Ypage 151).
or, if the SmartKey is inserted in the ignition
lock:
XRemove the SmartKey from the ignition
lock.
XMake sure that the engine cannot be star-
ted via your smartphone (
Ypage 154).
XMake sure that the passengers are not
endangered as they do so. Make sure that
no one is near the danger area while a
wheel is being changed. Anyone who is not directly assisting in the wheel change
should, for example, stand behind the bar-
rier.
XGet out of the vehicle. Pay attention to traf-
fic conditions when doing so.
XClose the driver's door.
MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flat
characteristics), you can continue to drive
your vehicle even if there is a total loss of
pressure in one or more tires. The affected
tire must not show any clearly visible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking next to the tire size designation, the load-
bearing capacity and the speed index
(
Ypage 377). MOExtended tires may only be used in con-
junction with an active tire pressure monitor.
If a pressure loss warning message
appears in the multifunction display:
Robserve the instructions in the display mes-
sages (
Ypage 279).
Rcheck the tire for damage.
Rif driving on, observe the following notes.
The driving distance possible in run-flat mode
is approximately 50 miles (80 km) when the
vehicle is partially laden and approximately
18 miles (30 km) when the vehicle is fully
laden.
In addition to the vehicle load, the driving dis-
tance possible depends upon:
Rvehicle speed
Rroad condition
Routside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving condi-
tions/maneuver, or it can be increased
through a moderate style of driving.
The driving distance possible in run-flat mode
i

s counted from the moment the tire pressure
loss warning appears in the multifunction dis-
play.
You must not exceed a maximum speed of
50 mph (80 km/h).
iWhen replacing one or all tires, please
observe the following specifications for
your vehicle's tires:
Rsize
Rthe type and
Rthe "MOExtended" mark
If a tire has gone flat and cannot be
replaced with a MOExtended tire, a stand-
ard tire may be used as a temporary meas-
ure. Make sure that you use the proper size
and type (summer or winter tire).
iVehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the
factory. It is therefore recommended that
you additionally equip your vehicle with a
Flat tire343
Breakdown assistance

TIREFIT kit if you mount tires that do not
feature run-flat properties, e.g. winter tires.
A TIREFIT kit may be obtained from a quali-
fied specialist workshop.
Important safety notes
GWARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is a risk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This applies in particular to a laden
vehicle.
Stop driving in emergency mode if:
Ryou hear banging noises.
Rthe vehicle starts to shake.
Ryou see smoke and smell rubber.
RESP®is intervening constantly.
Rthere are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked at a qualified specialist
workshop with regard to their further use. The
defective tire must be replaced in every case.
TIREFIT kit
Important safety notes
TIREFIT is a tire sealant.
You can use TIREFIT to seal punctures of up to
0.16 in (4 mm), particularly those in the tire
tread. You can use TIREFIT at outside tem-
peratures down to Ò4 ‡ (Ò20 †).
GWARNING
In the following situations, the tire sealant is
unable to provide sufficient breakdown assis-
tance, as it is unable to seal the tire properly:
Rthere are cuts or punctures in the tire larger
than those mentioned above.
Rthe wheel rim is damaged.
Ryou have driven at very low tire pressures or on a flat tire.
There is a risk of an accident.
Do not drive the vehicle. Contact a qualified
specialist workshop.
GWARNING
The tire sealant is harmful and causes irrita-
tion. It must not come into contact with your
skin, eyes or clothing or be swallowed. Do not inhale TIREFIT fumes. Keep tire sealant away
from children. There is a risk of injury.
If you come into contact with the tire sealant,
observe the following:
RRinse off the tire sealant from your skin
immediately with water.
RIf the tire sealant comes into contact with
your eyes, immediately rinse them thor-
oughly with clean water.
RIf tire sealant is swallowed, immediately
rinse your mouth out thoroughly and drink
plenty of water. Do not induce vomiting,
and seek medical attention immediately.
RImmediately change out of clothing which
has come into contact with tire sealant.
RIf an allergic reaction occurs, seek medical
attention immediately.
!Do not operate the tire inflation compres-
sor for longer than eight minutes at a time
without a break. It may otherwise overheat.
The tire inflation compressor can be oper-
ated again once it has cooled down.
Comply with the manufacturer’s safety
instructions on the sticker on the tire inflation
compressor.
344Flat tire
Breakdown assistance

If the automatic transmission cannot be shif-
ted to positionN, have the vehicle transpor-
ted on a transporter or trailer.
The battery must be connected and charged.
Otherwise, you:
Rcannot turn the SmartKey to position 2in
the ignition lock
Rcannot release the electric parking brake
Rcannot shift the automatic transmission to position N
iDeactivate the automatic locking feature
(
Ypage 90). You could otherwise be locked
out when pushing or towing the vehicle.
Installing/removing the towing eye
Installing the towing eye
The brackets for the screw-in towing eyes are
located in the bumpers. They are at the front
and at the rear under covers :.
XRemove the towing eye from the vehicle
tool kit/stowage tray (
Ypage 342).
XPress the mark on cover:inwards in the
direction of the arrow.
XRemove cover :from the opening.
XScrew in the towing eye clockwise as far as
it will go and tighten it.
Removing the towing eye
XUnscrew and remove the towing eye.
XAttach cover :to the bumper and press
until it engages.
XPlace the towing eye in the vehicle tool kit/
stowage tray.
Towing a vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(
Ypage 354).
The automatic transmission automatically
shifts to position Pwhen you open the driver's
or front-passenger door or when you remove
the SmartKey from the ignition lock.
In order to ensure that the automatic trans-
mission stays in position Nwhen towing the
vehicle, you must observe the following
points:
XYou must use the SmartKey instead of the
Start/Stop button (
Ypage 151).
XMake sure that the vehicle is stationary and
the SmartKey in the ignition lock is in posi-
tion 0.
XTurn the SmartKey to position 2in the igni-
tion lock.
XDepress and hold the brake pedal.
XShift the automatic transmission to posi-
tion N.
XRelease the brake pedal.
XRelease the electric parking brake.
XLeave the SmartKey in position 2in the
ignition lock.
XSwitch on the hazard warning lamps
(
Ypage 126).
iIn order to signal a change of direction
when towing the vehicle with the hazard
warning lamps switched on, use the com-
bination switch as usual. In this case, only
the indicator lamps for the direction of
travel flash. After resetting the combina-
Towing and tow-starting355
Breakdown assistance
Z

XRead thetire pressur eand compar eit to
th erecommended value on th eTir eand
Loadin gInformation placard or th etire
pressur etable (
Ypage 365).
XIf thetire pressur eis to olow, increase th e
tire pressur eto th erecommended value .
XIf thetire pressur eis to ohigh ,release air.
To do so, press down th emetal pin in th e
valve, usin gth etip of apen for example.
The nchec kth etire pressur eagain usin g
th etire pressur echecker.
XScrew th evalv ecap onto th evalve.
XRepeat these steps for th eother tires .
Tire pressure monitor
Genera lnotes
If atire pressur emonitor is installed, th evehi-
cle's wheels hav esensor sthat monitor th e
tire pressures in all fou rtires .The tire pres-
sur emonitor warn syou if th epressur edrops
in on eor mor eof th etires .The tire pressur e
monitor only function sif th ecorrespondin g
sensor sare installed in all wheels.
Information on tire pressures is displayed in
th emultifunction display. Afte r afew minute s
of driving, th ecurren ttire pressur eof eac h
tire is shown in th eServic e
menuof th emul-
tifunction display, see illustration (example).
Fo rinformation on th emessage display, refer
to th e"Checking th etire pressur eelectroni-
cally" section (
Ypage 370).
Important safety notes
GWARNING
Eac htire, includin gth espar e(if provided),
should be checke dat leas tonce every tw o
week swhen cold and inflated to th epressur e
recommended by th evehicl emanufacturer
on th eTir eand Loadin gInformation placard
on th edriver's doo rB-pillar or th etire pres-
sur elabel on th einside of th efuel filler flap .If
your vehicl ehas tires of adifferen tsiz ethan
th esiz eindicate don th eTir eand Loadin g
Information placard or, if available, th etire
pressur elabel ,you should determin eth e
proper tire pressur efor those tires .
As an added safet yfeature, your vehicl ehas
been equipped wit h atire pressur emonitoring
system (TPMS) that illuminate s alow tire pres-
sur etelltale when on eor mor eof your tires
are significantly underinflated. Accordingly,
when th elow tire pressur etelltale lights up,
you should stop and chec kyour tires as soo n
as possible, and inflat ethem to th eproper
pressure. Drivin gon asignificantly underin-
flated tire causes th etire to overheat and can
lead to tire failure.
Underinflation also reduce sfuel efficiency
and tire tread life ,and may affec tth evehicle's
handlin gand stopping ability. Pleas enote that
th eTPM Sis no t a
substitu
t efor proper tire
maintenance ,and it is th edriver's responsi-
bilit yto maintai ncorrec ttire pressure, eve nif
underinflation has no treached th elevel to
trigge rillumination of th eTPM Slow tire pres-
sur etelltale.
Your vehicl ehas also been equipped wit h a
TPM Smalfunction indicato rto indicate when
th esystem is no toperating properly. The
TPM Smalfunction indicato ris combine dwit h
th elow tire pressur etelltale. Whe nth esys-
te m detects amalfunction ,th ewarnin glamp
will flas hfor approximately aminute and then
remain continuousl yilluminated. This
sequence will be repeated every time th evehi-
cle is started as lon gas th emalfunction
exists. Whe nth emalfunction indicato ris illu-
Tire pressure36 9
Wheels and tires
Z

Direction of rotation
Tires with aspecifie ddirection of rotation
hav eadditional benefits, e.g. if there is aris k
of hydroplaning .These advantages can only
be gained if th etires are installed correspond-
in g to th edirection of rotation .
An arrow on th esidewall of th etire indicates
it s correc tdirection of rotation .
Storing wheels
Storewheels that are no tbein gused in acool,
dry and preferably dar kplace. Protec tth e
tires from oil, grease ,gasolin eand diesel.
Mounting awheel
Preparing th evehicle
XStop th evehicle on solid, non-slipper yand
level ground.
XApply th eelectric parking brake manually.
XBrin gth efron twheels into th estraight -
ahead position .
XShift thetransmissio nto position P.
XMakesur ethat "normal" level is selecte d
fo rAIRMATIC (
Ypage 197).
XSwitchof fth eengine.
XOpe nth edriver's door.
The on-boar delectronic sno whav estatus
0. Thi sis th esam eas th eSmartKey havin g
been removed.
XRemov eStart/Sto pbutto nfrom ignition
loc k (
Ypage 151).
or ,if th eSmartKey is inserte din th eignition
lock:
XRemov eth eSmartKey from th eignition
lock.
XMak esur ethat th eengin ecanno tbe star-
te dvia your smartphone (
Ypage 154).
XIf included in thevehicle equipment,
remov eth etire-chang etool ki tfrom th e
vehicle.
XSafeguar dth evehicle against rollin gaway.
Securing th evehicle to preven tit from
rollin gawa y
If your vehicle is equipped wit h awhee lchock,
it can be found in th etire-chang etool ki t
(
Ypage 342).
The foldin gwhee lchoc kis an additional
safet ymeasur eto preven tth evehicle from
rollin gaway, fo rexample when changin g a
wheel.
XFold bot hplates upwards :.
XFold out lowerplat e;.
XGuide th elugs on th elowe rplat efull yinto
th eopening sin base plat e=.
XOn leve lground: placechocks or other
suitable items under th efron tand rea rof
th ewhee lthat is diagonally opposite th e
whee lyou wish to change.
384Changing a wheel
Wheels and tires