2018 MERCEDES-BENZ SLC ROADSTER ECU

and warning lamps only indicateamalfunctio niftheylight up or flas hafter starting th eengine or
whilst driving.
Safety
Seat belts
Warning/
indicator
lampNSignalt ype
Possible causes/consequences and M
Solutions
üNAfte rstarting th eengine ,the red seat belt warning lamp lightsupf or six sec-
onds.
The seat belt warning lamp remind sthe driver and frontp assenger to fasten their
seat belts.
XFaste nyour seat belt (Ypage 42).
üNAfte rstarting th eengine ,the red seat belt warning lamp lightsu p. In addition,a
warning tone sounds for up to six seconds.
The driver'ss eat belt is notfastened.
XFaste nyour seat belt (Ypage 42).
The warning tone ceases.
üN The red seat belt warning lamp lightsupa fter theengine starts, as soon as the
driver'sort hefront-passenger door is closed.
The driver or frontp assenger has notfastene dtheir seat belt.
XFaste nyour seat belt (Ypage 42).
The warning lamp goes out.
Therea re object sonthefront-passenger seat.
XRemovet heobject sfromt hefront-passenger seat and stow them in asecure
place.
The warning lamp goes out.
üN The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or frontp assenger has notfastene dtheir seat belt.T he 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 42).
The warning lamp goes out and the intermitten twarning tone ceases.
There are object sonthe front-passenger seat. The vehicle is being driven faster
than 15 mph (2 5km/ h)or has briefly been driven faster than 15 mph (2 5km/ h).
XRemove th eobjects from th efront-pa ssenger seat and stow them in asecure
place.
The warning lamp goes out and th eintermittent warning tone ceases .
Warning and indicator lamps203
On-boardcomputer and displays
Z

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. Awarning tone also sounds.
GWARNING
There is not enough brake fluid in the brake fluid reservoir.
The braking effect may be impaired.
There is arisk 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 circumstances.
XSecure the vehicle against rolling away (Ypage 131).
XDo not add brake fluid. Adding more will not correct the malfunction.
XConsult aqualified specialist workshop.
XObserve the additional display messages in the multifunction display.
$NUSA only: the red brake system warning lamp is lit while the engine is running.
The multifunction display also shows adisplay message with the #symbol.
The brake pads/linings have reached their wear limit.
XVisit aqualified specialist workshop.
!NThe yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribution)
is malfunctioning.
Other driving systems and driving safety systems may also malfunction.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The front and rear wheels could therefore lock if you brake hard, for exam-
ple.
The steerability and braking characteristics may be severely affected. The braking
distance in an emergency braking situation can increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
If the ABS control unit is faulty, there is also apossibility that other systems, such
as the navigation system or the automatic transmission, will not be available.
204Warning and indicator lamps
On-board computer and displays

Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system
Rin th efuel system
The emission limit values may be exceeded and th eengine may be in emergency
mode.
XVisitaq ualified specialist workshop immediately.
In somes tates, you must immediately visi taqualified specialist workshop as soon
as th eyellow CheckE nginew arning lamp lightsu p. This is due to thelegal require-
ments in effect in these states. If in doubt,c heck whether suchl egal regulations
apply in th estate in whichy ou are currently driving.
8NThe yellow reservef uel warning lamp lightsupw hile theengine is running.
The fuel leve lhas dropped int othe reserver ange.
XRefuel at th enearest gas station.
8NThe yellow reservef uel warning lamp flashes while th evehicle is in motion.
In addition,t he; CheckE nginew arning lamp may light up.
The fuel fille rcap is no tclosed correctly or th efuel system is leaking.
XCheckt hatthe fuel fille rcap is correctly closed.
XIf th efuelfiller cap is not correctly closed: close thefuel fille rcap.
XIf th efuelfiller cap is closed: visitaq ualified specialist workshop.
?NThe red coolant warning lamp lightsupw hile theengine is runnin gand the
coolant temperatur egauge is at th estart of th escale.
The temperatur esensor for th ecoolant temperatur egauge is malfunctioning.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XPull ove rand stop th evehicle safely and switch off th eengine ,payinga ttention
to road and traffic conditions. Do no tcontinue driving unde rany circumstances.
XSecure th evehicle against rolling away (Ypage 131).
XConsult aqualified specialist workshop.
Warning and indicator lamps207
On-boardc omputer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant levelist oo low.
If the coolant levelisc orrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooleds ufficiently.
XObserve the additionaldisplay messages in the multifunction display.
XPullover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage131).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 35).
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 gauge is below the H
marking (Ypage1 64). Otherwise, the engine coul dbedamaged.
XDrive to the neares tqualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running.
The coolant temperature gauge has exceededt heHmarking (
Ypage1 64).The
airflow to the engine radiator may be blocked or the coolant levelm ay be too low.
GWARNING
The engine is not being cooleds ufficiently and may be damaged.
Do not drive when you rengine is overheated. This can caus esome fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can als ocaus eserious burns which can occur
just by opening the hood.
There is arisk of injury.
XObserve the additiona ldisplay messages in the multifunction display.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage131).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 35).
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.
208Warning and indicator lamps
On-board computer and displays

Tires
Warning/
indicator
lampNSignal type
Possible causes/consequence sand M
Solutions
hNThe yellow tire pressure monitor warning lamp (pressure loss/malfunction) is lit.
The tire pressure monitor hasd etecte dalossofp ressure in at leas tone of the tires.
GWARNING
Tire pressures thata retoo lo wposet he following hazards:
Rtheym ayburst, especially as the load and vehicl espeed increase
Rtheym aywear excessivel yand/or unevenly, which mayg reatlyimpai rtire trac-
tion.
Rthe drivin gcharacteristics, as well as steerin gand braking ,maybe greatly
impaired
There is ariskofana ccident.
XStop the vehicl ewithou tmaking any sudden steerin gorbraking maneuvers. Pay
attentio ntothe trafficc onditions as yo udoso.
XSecure the vehicl eagain st rolling away (Ypage 131).
XObserve the additional displa ymessage sinthe multifunctio ndisplay .
XCheck the tire sand,ifn ecessary,f ollowthe instructions for aflatt ire
(Ypage 246).
XCheck the tire pressure (Ypage 267).
XIf necessary,c orrect the tire pressure.
hNThe yellow tire pressure monitor warning lamp (pressure loss/malfunction)
flashe sfor approximately one minute and thenr emains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibl yunabl etor ecognize or register lo wtire pressure.
There is ariskofana ccident.
XObserve the additional displa ymessage sinthe multifunctio ndisplay .
XVisitaq ualified specialis tworkshop immediately.
210Warning and indicator lamps
On-board computer and displays

Connectingamobile phone
(COMAND)
Requirements
For telephony via th eBluetooth®interface, you
require aBluetooth®-capable mobile phone. The
mobile phonem ust support Hands-Free Profile
1. 0ora bove.
Multimedia system:
XSelect VehicleQSystem Set‐tingsQActivate Bluetooth.
XActivate Bluetooth®O.
Mobilep hone:
XActivate Bluetooth®and,ifn ecessary, Blue-
tooth®visibilityf or other devices (see the
manufacturer'so peratinginstructions).
The Bluetooth
®device names for all of onem an-
ufacturer'sp roductsmightbei dentical. To
mak eitp ossible to clearly identif yyour mobile
phone, chang ethe device nam e(see th eman-
ufacturer'so peratinginstructions).
If th emobile phones upportsthe PBA P(Phone
B oo kAccess Profile) and MAP( Message
Acc ess Profile )Bluetooth
®profiles, th efollow-
ing informatio nwill be transmitte dafter you
connect:
RPhoneb ook
RCall lists
RTextmessages and e-mail
iFurther informatio nonsuitable mobile
phones can be foun dat:http://
www.mercedes-benz.com/connect
iIn th eUSA,you can get in touch witht he
Mercedes-Ben zCustome rAssistanc eCenter
on 1-800-FOR-MERCedes (1-800-367-6372 ).
In Canada, you can get in touch with the Cus-
tomer Relations Center on 1-800-387-0100.
Searchin gfor and authorizing (connect-
ing) amobile phone
Before using you rmobilep hone with the multi-
media system for the first time, you willn eed to
search for the phone and then authorize (con-
nect) it. Depending on the mobilep hone, author-
ization either takes place by means of Secure
Simple Pairing or by entering apasskey.T he
multimedia system automatically makes the procedure that is relevant for you
rmobilep hone
available. The mobilep hone is always connec-
ted automatically after authorization. Further
information on using amobilep hone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobilep hone, this may be due to particular
security settings on you rmobilep hone (see the
manufacturer's operating instructions).
Only one mobilep hone can be connected to the
multimedia system at any one time.
Searchin gfor am obile phone
Multimedia system:
XSelect Tel/®QConn.DeviceQSearc hfor PhonesQStartSearch.
The available mobilep hones are displayed.
Symbols in the devicel ist
Sym-
bolExplanation
ÏNew mobilephone found, not yet
authorized.
ÑMobilep hone is authorized, but is
not connected.
Connecting amobile phone
Authorization using Secure Simple Pairing:
XSelect mobilep hone.
Ac ode is displaye dinthe multimedia system
and on the mobilep hone.
XIf codesmatch: select Yeson the multimedia
system.
XConfirm code on the mobilep hone. Depend-
ing on the mobilep hone used,confirm the
connection to the multimedia system and for
the PBAP and MAP Bluetooth
®profiles. The
prompt to confirm may take up to two
minutes to be displaye d(see the manufactur-
er's operating instructions).
XIf the code sare different: selectNoon the
multimedia system.
The process is canceled.
Repeat authorization.
Operating system215
Multimedia system
Z

Authorization by enteringapasskey( passcode):
XSelect the Bluetooth®nameoft he mobile
phone.
The input menu for the passkeyisd isplayed.
XChoos eaone to sixteen-digitn umbercombi-
nation as apasskey.
XEnter the passkeyont he multimedia system.
XPress¬to confirm.
XEnter and confirm the passkeyont he mobile
phone. Depending on the mobil ephone used,
confirm the connectio ntothe multimedia sys-
tem and for the PBAP and MAP Bluetooth
®
profiles. The prompt to confirm mayt ake up
to two minutes to be displayed (se ethe man-
ufacturer's operating instructions).
Connectin gamobilephon e(Au dio 20)
Requirements
For telephony via the Bluetooth®interface, you
require at leas tone Bluetooth®-capable mobile
phone depending on us eofone-telephone
mode ortwo-telephon emode.The mobile
phone must support Hands-FreeP rofile1.0 or
above.
In two-telephon emode youc an us eallthe
functions of the multimedia system with the
main telephone .Witht he additional tele-
phone ,you can receive incoming calls.
Multimedia system:
XSelect VehicleQSystem Set‐tingsQActivate Bluetooth.
XActivate Bluetooth®O.
Mobil ephone:
XActivate Bluetooth®and ,ifn ecessary,B lue-
tooth®visibility for othe rdevice s(seet he
manufacturer's operating instructions).
The Bluetooth
®device names for al lofone man-
ufacturer's products might be identical .To
make it possibl etoclearly identify your mobile
phone, change the device nam e(seet he man-
ufacturer's operating instructions). If the mobil
ephone supports the PBAP ( Phone
Book Access Profile )and MAP ( Message
A ccess Profile) Bluetooth
®profiles, the follow-
ing informatio nist ransmitte dafteryou connect
the main telephone:
RPhone book
RCall lists
RText messages and e-mail
iFurther informatio nonsuitabl emobile
phones can be found at: http://
www.mercedes-benz.com/connect
iIn the USA, yo ucan getint ouch with the
Mercedes-Benz Customer Assistance Center
on 1-800-FOR-MERCedes (1-800-367-6372).
In Canada, yo ucan getint ouch with the Cus-
tomerR elations Center on 1-800-387-0100.
Searching for and authorizing (connect-
ing) amobile phone
Before using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorize (con-
nect)i t. Depending on the mobile phone, author-
ization either takes place by means of Secure
Simple Pairing or by enteringap asskey. The
multimedia system automatically makes the
procedure that is relevant for your mobile phone
available. The mobile phone is always connec-
ted automatically after authorization. Further
information on using amobile phone with the
multimedia system (see the Digital Operator's
Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the
manufacturer's operating instructions).
Searching for amobile phone
Multimedia system:
XSelect Tel/®QConn. DeviceQCon‐nect New Device.
XSelectConnect via Vehicle.
XSelect mobile phone.
Connecting amobile phone
XOne-telephone mode: selectConnect as
New Main Phone.
XTwo-telephone mode: selectConnect as
Additional Phonewhenamobile phone is
already connected.
216Operating system
Multimedia system

XAuthorizationusingS ecur eSimple Pai r-
ing:
Ac odeisd isplayed inthem ultimedia system
and on th emobile phone.
XConfir mcodeont hemob ilephone. Depend-
ing on th emobile phoneu sed, confirm the
connection to th emultimedia system and for
th eP BAPa nd MAPB luetooth
®profiles. The
prompt to confirm may tak euptotwo
minute stobed isplayed (see th emanufactur-
er' so peratin ginstructions).
XIfth ec odes are different :select Noon the
multimedia system.
The proces siscanceled.
Repeat authorization.
or
XAuthorizatio nbyentering apasskey
(passcode): enterany one- to sixteen-digit
number sequenc ewhichy ou have chosen
yourself int othe passke yinput menu.
XPress ¬to confirm.
XEnterand confirm th epasske yonthe mob ile
phone. Dependin gonthemob ilephoneu sed,
confirm th econnectio ntothemultimedia sys-
te ma nd for th ePBAPa nd MAPB luetooth
®
profiles. The prompt to confirm may tak eup
to two minute stobedisplayed (see th eman-
ufacturer' soperatin ginstructions).
Symbols in th edevice manager
The symbols are shown in color dependingon
their use.
SymbolExplanation
Mobile phonec onnected to the
multimedia system
Main telephone withfull range of
functions
Ad ditional telephone for incoming
calls intwo telephone mode
Media mode
General notes
If you wish toplay external medi asources ,the
appropriat emediam odem ust alread ybeturned
on.F urther informatio nonmediam ode(see the
Digital Operator's Manual). The followinge
xternalmediasources can be
used:
RApple®device s(e.g. iPhone®)
RUSBd evices(e.g. USBs tick ,M P3 player)
(Ypage 218)
RCD
RDV D(COMAND)
RSD cards
Rvia device sconnected byBluetooth®
iInformation on single CD/DV DdriveorD VD
changer (see th eDigital Operator's Manual).
Selecting usin gthe device list
Multimedia system:
XSelectMediaQDevices.
The available medi asources willbe shown.
The #dot indicates th ecurren tsetting.
XSelect th emediasource.
Playable filesare played.
Inserting/removing an SD card
Important safety notes
GWARNING
SD cardsare smal lparts. They can beswal-
lowed and caus echoking. This posesa n
increased ris kofinjury or eve nfatal injury.
Keep th eSDc ardo ut of th ereac hofc hildren.
If aS Dc ardiss wallowed, seek medical atten-
tio nimmediately.
!If you are no longer usingt heSD card,you
should remove it and store itoutside thev ehi-
cle .Hight em peratures can damag ethe card.
Insertin ganSDc ard
TheSDcardslot islocate donthecontrol panel.
XInsertt heSD cardintot he SD cardslot until
th eS Dc arde ngages.T he side withthe con-
tacts must fac edown.
Removing an SD card
XPress th eSDc ard.
The SD car disejected.
XRemo vetheS Dc ard.
Operatin gsystem217
Multimedia system
Z