2018 MERCEDES-BENZ SL ROADSTER air condition

Display messagesPossible causes/consequences andMSolutions
lamp remainslit or goe sout depend son how OCS classifies th eoccu-
pant.
If th econdition sare no tfulfilled ,th esystem is no toperating correctly.
XVisit aqualified specialist workshop immediately.
Observ eth eadditional information on OCS (
Ypage 48).
Lights
Display messagesPossible causes/consequences and MSolutions
b
CheckLeftLowBeam(Example)
The correspondin gbulb is faulty.
XVisit aqualified specialist workshop .
or
XChec kwhether you are permitte dto replace th ebulb yourself
(Ypage 110).
LE Dligh tsources: th edisplay message for th ecorrespondin glamp
only appear swhen all th eLEDs in th elamp hav efailed.
b
Active HeadlampsInoperative
The active ligh tfunction is faulty.
XVisit aqualified specialist workshop .
b
Malfunction SeeOperator'sManual
The exterio rlighting is malfunctioning .
XVisitaqualified specialist workshop .
b
AutoLam pFunctionInoperative
The ligh tsensor is defective.
XVisit aqualified specialist workshop .
b
Switch Off Lights
The lights are still switched on when you leav eth evehicle. Awarning
tone also sounds.
XTurn th eligh tswitch to position Ã.
Adaptive HighbeamAssist CurrentlyUnavailable SeeOperator'sManual
Adaptive Highbea mAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
XClean thewindshield.
If th esystem detects that th ecamera is full yoperational again ,th e
Adaptive
HighbeamAssistNowAvailablemessage is displayed.
Adaptive Highbea mAssis tis operational again .
Adaptive HighbeamAssist InoperativeAdaptive HighbeamAssis tis faulty.
XVisit aqualified specialist workshop .
212Display messages
On-board computer and displays

Engine
Display messagesPossible causes/consequences andMSolutions
?
CheckCoolantLevelSee Operator's Man‐ual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
XAdd coolant, observing the warning notes before doing so
(Ypage 260).
XIf you need to add coolant more often than usual, have the engine
coolant system checked at a qualified specialist workshop.
?The fan motor is malfunctioning.
XIf the coolant temperature gauge is below the Hmarking
(Ypage 186), drive on to the next qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-and-go traffic.
?
Coolant Too HotStop Vehicle TurnEngine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
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.
XPull over and stop the vehicle safely and switch off the engine, pay- ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 142).
XLeave the vehicle and keep a safe distance from the vehicle until the
engine has cooled down.
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 display message goes out and
the coolant temperature gauge is below the Hmarking
(
Ypage 186). Otherwise, the engine could be damaged.
XPay attention to the coolant temperature gauge, observing the
warning notes (Ypage 260).
XIf the temperature increases again, visit a qualified specialist work-
shop immediately.
Under normal operating conditions and at the correct coolant level,
the coolant temperature gauge may rise to the Hmarking
(
Ypage 186).
Display messages213
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
The vehicleis leaking oil.
The multifunction display continuousl yshows th edisplay message .
GWARNING
The vehicle's suspension setting smay be affected.
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. Do no tcontinu edrivin g
under any circumstances.
XSecur eth evehicl eagainst rollin gaway (Ypage 142).
XConsult aqualified specialist workshop or breakdown servic e
immediately.
Active Body Control (ABC) is malfunctioning .
The multifunction display continuousl yshows th edisplay message .
GWARNING
The suspension setting sare thus affected.
There is aris kof an accident.
XDo no tdrive at speeds abov e50 mph (80 km/h).
XMak eonly slight steering movements. Otherwise ,th efron tfender
or th etires could be damaged if th esteering movement is to olarge.
XListe nfor scraping sounds.
XVisit aqualified specialist workshop immediately.
À
Attention Assist :Take a Break!
Based on certain criteria, ATTENTION ASSIST has detecte dfatigue or
a lack of concentration on th epart of th edriver . Awarning tone also
sounds.
XIf necessary, tak e abreak.
During lon gjourneys, tak eregular breaks in goo dtime so you get
enough rest.
À
Attention AssistInoperative
ATTENTION ASSIST is inoperative.
XVisit aqualified specialist workshop .
TrafficSignAssistCurrently Unavaila‐ble See Operator' sManual
Traffic SignAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
XClean thewindshield.
If th esystem detects that th ecamera is full yoperational, th edisplay
message disappears.
Traffic Sig nAssis tis operational again .
TrafficSignAssistInoperativeTraffic Sig nAssis tis malfunctioning .
XVisitaqualified specialist workshop .
216Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
ë
Off
The HOLD function is deactivated. The vehicl eis skidding.
A warning tone also sounds.
XReactivat eth eHOLD function later (Ypage 159).
ActiveLaneKeepin gAssist CurrentlyUnavailable SeeOperator' sManual
Active Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
RThere havebeen no lan emarking sfor an extended period
RThe lan emarking sare wor naway, dark or covered up, e.g. by dir tor
snow
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Active Lan eKeepin gAssis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 142).
XClean th ewindshield.
ActiveLan eKeepin gAssist InoperativeActive Lan eKeepin gAssis tis malfunctioning .
XVisitaqualified specialist workshop .
Active Blind SpotAssist CurrentlyUnavailable SeeOperator'sManual
Active Blind Spot Assis tis temporarily inoperative.
Possibl ecauses are:
RThe radar sensor system is outside th eoperating temperature
range.
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation .
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Active Blind Spot Assis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 142).
XClean th esensor s (Ypage 267).
XRestart th eengine.
Active Blind Spo tAssist InoperativeActive Blind Spot Assis tis malfunctioning .
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
XVisit aqualified specialist workshop .
Display messages217
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Steering Pilot Cur‐rently UnavailableSee Operator'sMan ‐ual
Steering Pilo tand Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
RThere havebeen no lan emarking sfor an extended period
RThe lan emarking sare wor naway, dark or covered up, e.g. by dir tor
snow
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Steering Pilo tand Stop&Go Pilo tare operative again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 142).
XClean th ewindshield.
SteeringPilotInop‐erativ eSteering Pilo tand Stop&Go Pilo tare faulty.
However, th eDistanc ePilo tDISTRONI Cfunction sare still available.
A warning tone also sounds.
XVisit aqualified specialist workshop .
Cruise ControlOffCruis econtrol has been deactivated.
If awarning tone also sounds, cruise control has deactivated auto -
matically (
Ypage 149).
Cruise Contro l - --mphCruis econtrol canno tbe activated, since no tall of th eactivation con-
dition shav ebeen met .
XCheckth eactivation condition sfor cruise control (Ypage 149).
CruiseControlInop‐erativeCruisecontrol is malfunctioning .
A warning tone also sounds.
XVisit aqualified specialist workshop .
220Display messages
On-board computer and displays

Tires
Display messagesPossible causes/consequences andMSolutions
PleaseCorrectTirePressureThe tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
XCheck the tire pressures at the next opportunity (Ypage 291).
XIf necessary, correct the tire pressure.
XRestart the tire pressure monitor (Ypage 293).
Tire Pressure SoonThe tire pressure in one or more tires has dropped significantly. The
wheel position is shown in the multifunction display.
A warning tone also sounds.
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 142).
XCheck the tires and, if necessary, follow the instructions for a flat
tire (Ypage 271).
XCheck the tire pressure (Ypage 291).
XIf necessary, correct the tire pressure.
Warning Tire Mal‐functionThe tire pressure in one or more tires has dropped suddenly. The wheel
position is shown in the multifunction display.
GWARNING
Driving with a flat tire poses a risk of the following hazards:
Ra flat tire affects the ability to steer or brake the vehicle
Ryou could lose control of the vehicle.
Rcontinued driving with a flat tire will cause excessive heat build-up and possibly a fire
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 142).
XCheck the tires and, if necessary, follow the instructions for a flat
tire (Ypage 271).
Displa y messages221
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
OnlySelect Par k(P)WhenVehicl eisStationar y
The vehicleis moving .
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XShift th etransmission to position j.
Apply Brake toSelectRYou haveattempte dto shift from position hto position k.
XDepress thebrak epedal .
XShift th etransmission to position k.
ServiceRequiredDoNot Shift GearsVisit Dealer
You canno tchang eth etransmission position due to amalfunction .
A warning tone also sounds.
If transmission position his selected:
XDrive to aqualified specialist workshop without shifting th etrans -
mission from position h.
If position k,iorj is selected:
XNotify aqualified specialist workshop or breakdown service.
ReversingNotPossi‐bleServic eRequiredYou can no longer shift to transmission position kdue to amalfunc -
tion .
Transmission position sj, iorh continu eto be available.
A warning tone also sounds.
XVisit aqualified specialist workshop .
Transmission Mal‐function StopAmalfunction has occurred in th emechanical transmission compo -
nents.
A warning tone also sounds. The transmission shift sautomatically to
position i.
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XShift th etransmission to position j.
XSecureth evehicl eagainst rollin gaway (Ypage 142).
XNotify aqualified specialist workshop or breakdown service.
Sto pVehicl eLeaveEngineRunnin gWaitTransmission Cool‐ing
The transmission has overheated. Pullin gaway can be temporarily
impaire dor no tpossible.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions. Do no tcontinu edrivin g
under any circumstances.
XWait until th edisplay message disappear sbefore pullin gaway.
Auxiliary Batter yMalfunctionThe auxiliary battery for th eautomatic transmission is no longer bein g
charged.
XVisit aqualified specialist workshop at th enext opportunity.
XUnti lthen ,always shift th etransmission to position jbefore you
switch off th eengine.
XBefor eleaving th evehicle, apply th eelectric parking brake.
Display messages22 3
On-board computer and displays
Z

Safety systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
$JN$ (USA only), 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 circumstances.
XSecure the vehicle against rolling away (Ypage 142).
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.
GWARNING
There is not enough brake fluid in the brake fluid reservoir.
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 circumstances.
XSecure the vehicle against rolling away (Ypage 142).
XDo not add brake fluid. Adding more will not correct 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.
228Warning and indicator lamps
On-board computer and displays