ECU MERCEDES-BENZ S-COUPE 2016 Workshop Manual

Display messagesPossible causes/consequences andMSolutions
WarningTir eMal ‐
function
The tire pressur ein on eor mor etires has dropped suddenly. The
whee lposition is displayed in th emultifunction display.
GWARNIN G
Drivingwit h a flat tire poses aris kof th efollowing hazards :
Raflat tire affects th eabilit yto steer or brak eth evehicle.
Ryou could los econtrol of th evehicle.
Rcontinued drivin gwit h a flat tire will caus eexcessive heat build-
up and possibl y afire.
There is aris kof an accident.
XStop th evehicl ewithout makin gany sudden steerin gor brakin g
maneuvers .Pay attention to th etraffic condition sas you do so.
XSecur eth evehicl eagainst rollin gaway (Ypage 170).
XCheckth etires and ,if necessary, follow th einstruction sfo r a
flat tire (
Ypage 342).
TirePress. Moni‐
tor Currently
Unavailable
Becaus ethere is interferenc efrom astron gsource of radi owaves,
no signal sfrom th etire pressur esensor sare detected. The tire
pressur emonitor is temporarily malfunctioning.
XDrive on .
The tire pressur emonitor restarts automatically as soo nas th e
problem has been resolved.
TirePress .Sen ‐
sor(s) Missin g
There is no signal from th etire pressur esensor of on eor several
wheels. The pressur eof th eaffecte dtire is no tdisplayed in th e
multifunction display.
XHav eth efault ytire pressur esensor replaced at aqualified spe -
cialist workshop .
TirePressure Mon ‐
itorInoperative
No Wheel Sensor s
The wheels mounted do no thav e a suitable tire pressur esensor .
The tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin g
fo r a few minutes.
Tir ePress. Moni‐
tor Inoperative
The tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
280Display messages
On-board computer and displays

Vehicle
Display messagesPossible causes/consequences andMSolutions
Shift to 'P' or
'N'toStartEngine
You have attempted to start the engine with the transmission in
positionRor D.
XShift the selector lever to position Por N.
Apply Brake to
Shift from 'P'
You have attempted to shift the selector lever to position D,R or N
without depressing the brake pedal.
XDepress the brake pedal.
To Deselect P or
N, Depress Brake
and Start Engine
With the engine switched off, you have attempted to shift the
selector lever out of position Por Ninto another transmission
position.
XDepress the brake pedal.
XStart the engine.
Transmission Not
in P Risk of Vehi‐
cle Rolling Away
The driver's door is open or not fully closed and the selector lever
is in position R,N or D.
A warning tone also sounds.
GWARNING
The vehicle may roll away.
There is a risk of an accident.
XShift the selector lever to position P.
XSecure the vehicle against rolling away (Ypage 170).
XClose the driver's door completely.
Only Shift to 'P'
when Vehicle is
Stationary
The vehicle is moving.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XShift the selector lever to positionP.
Service Required
DoNotShiftGears
Visit Dealer
You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission positionDis selected:
XDrive to a qualified specialist workshop without shifting the
transmission from position D.
If transmission position R,Nor Pis selected:
XSecure the vehicle against rolling away (Ypage 170).
XNotify a qualified specialist workshop or breakdown service.
Display messages281
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Reversing Not Pos‐
sible Service
Required
You cannotshift into th etransmissio nposition Rdue to amal-
function .
The transmissio nposition sP, Nor Dcontinue to be available.
A warnin gtone also sounds.
XVisit aqualified specialist workshop .
Transmission Mal‐
function Stop
Amalfunction has occurred in th emechanica ltransmissio ncom-
ponents .
A warnin gtone also sounds. The gearbox automatically shift sto
position N.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XShift th eselector lever to position P.
XSecureth evehicl eagainst rollin gaway (Ypage 170).
XNotify aqualified specialist workshop or breakdown service.
Auxiliary Batter y
Malfunction
The auxiliarybattery fo rth etransmissio nis no longer bein g
charged.
XVisit aqualified specialist workshop at th enext opportunity.
XUnti lthen ,shift th eselector lever to position Pbefore you switch
of fth eengine.
XBefore leavin gth evehicle, apply th eelectric parkin gbrake.
NThe trunk lid is open .
XCloseth etrunk lid.
MThe hoo dis open . Awarnin gtone also sounds.
GWARNIN G
The open hoo dmay bloc kyour vie wwhen th evehicl eis in motion .
There is aris kof an accident.
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).
XCloseth ehood.
CAt leas ton edoo ris open . Awarnin gtone also sounds.
XClos eall th edoors .
282Display messages
On-board computer and displays

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

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
üNThe red seat belt warning lamp lights up after the engine starts, as soon as
the driver's or the front-passenger door is closed.
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 48).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow them in a
secure place.
The warning lamp goes out.
üN The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or front passenger has not fastened their seat belt. The vehicle is
being driven faster than 15 mph (25 km/h) or has briefly been driven faster
than 15 mph (25 km/h).
XFasten your seat belt (Ypage 48).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicle is being driven
faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph
(25 km/h).
XRemove the objects from the front-passenger seat and stow them in a
secure place.
The warning lamp goes out and the intermittent warning tone ceases.
286Warning and indicator lamps in the instrument cluster
On-board computer and displays

Safety systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
$JN$ (USA only) or J(Canada only): the red brake system warning lamp
is lit while the engine is running.
A warning tone also sounds.
GWARNING
The brake boosting effect is malfunctioning and the braking characteristics
may be affected.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention to
road and traffic conditions. Do not continue driving under any circumstan-
ces.
XSecure the vehicle against rolling away (Ypage 170).
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
$JN $ (USA only) or J(Canada only): the red brake system warning lamp
is lit while the engine is running.
A warning tone also sounds.
There is not enough brake fluid in the brake fluid reservoir.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention to
road and traffic conditions. Do not continue driving under any circumstan-
ces.
XSecure the vehicle against rolling away (Ypage 170).
XDo not add brake fluid. Adding more will not remedy the malfunction.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
$N USA only: the red brake system warning lamp is lit while the engine is
running. The multifunction display also shows a display message with the
# symbol.
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster287
On-board computer and displays
Z

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

Tires
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
hNThe yellow combination low tire pressure telltale/TPMS malfunction telltale
for the TPMS is lit.
The tire pressure monitor has detected a loss of pressure in at least one of the
tires.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase.
Rthey may wear excessively and/or unevenly, which may greatly impair tire
traction.
Rthe driving characteristics, as well as steering and braking, may be greatly
impaired.
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking maneuvers.
Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 170).
XObserve the additional display messages in the multifunction display.
XCheck the tires and, if necessary, follow the instructions for a flat tire
(
Ypage 342).
XCheck the tire pressure (Ypage 369).
XIf necessary, correct the tire pressure.
hN The yellow combination low tire pressure telltale/TPMS malfunction telltale
for the TPMS flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
XObserve the additional display messages in the multifunction display.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster297
On-board computer and displays
Z

Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops (
Ypage 26).
Stowage areas
Loading guidelines
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
GWARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
The handling characteristics of a laden vehi-
cle are dependent on the distribution of the
load within the vehicle. For this reason, you
should observe the following notes when
transporting a load:
RNever exceed the maximum permissible
gross vehicle weight or the gross axle
weight rating of the vehicle (including occu-
pants). The values are specified on the vehi-
cle identification plate on the B-pillar of the
driver's door.
RThe trunk is the preferred place to carry
objects.
RPosition heavy loads as far forwards as pos-
sible and as low down in the trunk as pos-
sible.
RThe load must not protrude above the
upper edge of the seat backrests.
RAlways place the load behind unoccupied
seats if possible.
RSecure the load with sufficiently strong and
wear-resistant tie-downs. Pad sharp edges
for protection.
Stowage spaces
Important safety notes
GWARNING
If you do not correctly store objects in the
vehicle interior, they can slip or be flung
around, thus striking vehicle occupants.
There is a risk of injury, especially when brak- ing or abruptly changing directions.
RAlways store objects so that they cannot be
flung around in these or in similar situa-
tions.
RAlways make sure that objects do not pro-
trude from stowage compartments, parcel
nets or stowage nets.
300Stowage areas
Stowage and features