warning lights MERCEDES-BENZ SL CLASS 2019 Owner's Manual

When the engine is running, the vehicle is sta-tionary and in bright ambient light: if you turnthe light switch to the`position, the day-time running lamps and parking lamps switchon.
If the engine is running and you turn the lightswitch toX, the manual settings take prec-edence over the daytime running lamps.
USA only:
The daytime running lamps improve the visibil-ity of your vehicle during the day. To do this,the daytime running lamps function must beswitched on using the on-board computer(Ypage 200).
If the engine is running and you turn the lightswitch to`orX, the manual settingstake precedence over the daytime runninglamps.
Low-beam headlamps
GWARNING
When the light switch is set toX, the
low-beam headlamps may not be switched
on automatically if there is fog, snow or
other causes of poor visibility due to the
weather conditions such as spray. There is a
risk of an accident.
In such situations, turn the light switch to
X.
Even if the light sensor does not detect that itis dark, the parking lamps and low-beam head-lamps switch on when the ignition is switchedon and the light switch is set to theXposi-tion. This is a particularly useful function in theevent of rain and fog.
XTo switch on the low-beam headlamps:turn the SmartKey to positionHin the igni-tion lock or start the engine.
XTurn the light switch toX.The greenXindicator lamp in the instru-ment cluster lights up.
Parking lamps
!If the battery charge is very low, the park-ing lamps or standing lamps are automati-cally switched off to enable the next enginestart. Always park your vehicle safely and ina well lit area, in accordance with the rele-vant legal stipulations. Avoid using the`parking lamps over a period of several
hours. If possible, switch on the right-handdor left-handcstanding lamps.
XTo switch on:turn the light switch to`.The green`indicator lamp in the instru-ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures thecorresponding side of the vehicle is illumina-ted.
XTo switch on the standing lamps:theSmartKey is not in the ignition lock or it is inposition

The blueWindicator lamp in the instru-ment cluster lights up when the high-beamheadlamps are switched on.
XTo switch off the high-beam headlamps:move the combination switch back to itsnormal position.The blueWindicator lamp in the instru-ment cluster goes out.
Hazard warning lamps
XTo switch on the hazard warning lamps:press buttonC.All turn signals flash. If you now switch on aturn signal using the combination switch,only the turn signal lamp on the correspond-ing side of the vehicle will flash.
XTo switch off the hazard warning lamps:press buttonC.
The hazard warning lamps automaticallyswitch on if:
Ran air bag is deployed or
Rthe vehicle decelerates rapidly from a speedof above 45 mph (70 km/h) and comes to astandstill
The hazard warning lamps switch off automati-cally if the vehicle reaches a speed of above6 mph (10 km/h) again after a full brake appli-cation.
iThe hazard warning lamps still operate ifthe ignition is switched off.
Cornering light function
The cornering light function improves the illu-mination of the road over a wide angle in thedirection you are turning, enabling better visi-bility in tight bends, for example. The corner-
ing light function can only be activated whenthe low-beam headlamps are switched on.
Active:
Rif you are driving at speeds below 25 mph(40 km/h) and switch on the turn signal orturn the steering wheel
Rif you are driving at speeds between 25 mph(40 km/h) and 45 mph (70 km/h) and turnthe steering wheel
The cornering lamp may remain lit for a shorttime, but is automatically switched off after nomore than three minutes.
Cornering light function with traffic circlefunction:
The cornering light function is activated onboth sides before entering a traffic circlethrough an evaluation of the current GPS posi-tion of the vehicle. It remains active until afterthe vehicle has left the traffic circle. In thisway, pedestrians crossing the road, for exam-ple, are illuminated by your vehicle in goodtime.
Active light function
The active light function is a system thatmoves the headlamps according to the steer-ing movements of the front wheels. In thisway, relevant areas remain illuminated whiledriving. This allows you to recognize pedes-trians, cyclists and animals sooner.
Active:when the lights are switched on.
Vehicles with Lane Keeping Assist: the activelight function evaluates the course of the lanein which you are driving and pre-emptivelycontrols the active light function.
Adaptive Highbeam Assist
General notes
You can use this function to set the headlampsto change between low beam and high beamautomatically. The system recognizes vehicleswith their lights on, either approaching fromthe opposite direction or traveling in front ofyour vehicle, and consequently switches theheadlamps from high beam to low beam.
The system automatically adapts the low-beamheadlamp range depending on the distance tothe other vehicle. Once the system no longer
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detects any other vehicles, it reactivates thehigh-beam headlamps.
The system's optical sensor is located behindthe windshield near the overhead controlpanel.
Important safety notes
GWARNING
Adaptive Highbeam Assist does not recog-
nize road users:
Rwho have no lights, e.g. pedestrians
Rwho have poor lighting, e.g. cyclists
Rwhose lighting is blocked, e.g. by a barrier
On very rare occasions, Adaptive Highbeam
Assist may fail to recognize other road users
that have lights, or may recognize them too
late. In this, or in similar situations, the auto-
matic high-beam headlamps will not be
deactivated or will be activated regardless.
There is a risk of an accident.
Always carefully observe the traffic condi-
tions and switch off the high-beam head-
lamps in good time.
Adaptive Highbeam Assist cannot take intoaccount road, weather or traffic conditions.Adaptive Highbeam Assist is only an aid. Youare responsible for adjusting the vehicle'slighting to the prevailing light, visibility andtraffic conditions.
In particular, the detection of obstacles can berestricted if there is:
Rpoor visibility, e.g. due to fog, heavy rain orsnow
Rdirt on the sensors or the sensors areobscured
Switching Adaptive Highbeam Assist
on/off
XTo switch on:turn the light switch toX.
XPress the combination switch beyond thepressure point in the direction of arrowC.The

Key is in the vehicle. This occurs, for example,when starting the engine.
To start the vehicle without actively using theSmartKey:
Rthe Start/Stop button must be inserted inthe ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with theSmartKey or KEYLESS-GO (Ypage 74).
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile phoneor another SmartKey.
Rwith metallic objects, e.g. coins or metalfoil.
Rinside metallic objects, e.g. a metal case.
This can impair the functionality of the KEY-LESS-GO key.
If you lock the vehicle with the SmartKey'sremote control or with KEYLESS-GO, after ashort time:
Ryou will not be able to switch on the ignitionwith the Start/Stop button.
Ryou will not be able to start the engine withthe Start/Stop button until the vehicle isunlocked again.
The engine can be switched off while the vehi-cle is in motion by pressing and holding theStart/Stop button for three seconds. Thisfunction operates independently of the ECOstart/stop automatic engine switch-off func-tion.
Key positions with KEYLESS-GO
CStart/Stop button
DIgnition lock
As soon as the ignition is switched on, all theindicator lamps in the instrument cluster lightup. Further information on situations where anindicator lamp either fails to go out after start-
ing the engine or lights up while driving(Ypage 235).
If Start/Stop buttonChas not yet beenpressed, this corresponds to the key beingremoved from the ignition.
XTo switch on the power supply:pressStart/Stop buttonConce.The power supply is switched on. You cannow activate the windshield wipers, forexample.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop buttonCtwicewhen in this position
XTo switch on the ignition:press Start/Stop buttonCtwice.The ignition is switched on.
If you press Start/Stop buttonConcewhen in this position, the ignition isswitched off again.
Removing the Start/Stop button
You can remove the Start/Stop button fromthe ignition lock and start the vehicle as nor-mal using the SmartKey.
XRemove Start/Stop buttonCfrom ignitionlockD.
You do not have to remove the Start/Stop but-ton from the ignition lock when you leave thevehicle. You should, however, always take theSmartKey with you when leaving the vehicle.As long as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/Stop button
Rthe electrically powered equipment can beoperated
Starting the engine
Important safety notes
GWARNING
If children are left unsupervised in the vehi-
cle, they could:
Roperate the vehicle's equipment
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kinetic energy and consumes less fuel(coasting mode).
RESP®provides the optimum compromisebetween traction and stability. Further infor-
mation about ESP®(Ypage 66).
Mercedes-AMG vehicles
RACE drive program
iThe RACE drive program may not be usedon normal roads. RACE must only be activa-ted and used on dedicated race circuits, noton public roads.
TheRACEdrive program is characterized bythe following:
Rthe vehicle exhibits driving characteristicssuitable for the racetrack.
Rall vehicle systems are set for maximumsportiness.
Rthe gearshift recommendation gives youinformation for slowly warming up the driveassemblies and for adopting a fuel-efficientdriving style (Ypage 141). You can followthe gearshift recommendations at all timesand shift gear accordingly using the steeringwheel paddle shifters. On the basis of thegearshift recommendation, using the steer-ing wheel paddle shifters, you can optimizethe drive train and engine operating mode atany time.
Rif you have selected a gear manually, thiswill be maintained until the vehicle speedincreases or decreases dramatically.
Rthe vehicle pulls away in first gear.
Rthe automatic transmission shifts up later.The fuel consumption possibly being higheras a result of the later automatic transmis-sion shift points.
Rthe suspension exhibits particularly firmdamping settings.
Rgliding mode is not available.
Rthe ECO start/stop function is not available.
RESP®switches to SPORT handling mode.ThetSPORT handling mode warninglamp in the instrument cluster lights up. TheSPORT Handling ModeSPORT Handling Modemessage appears inthe multifunction display. Observe theimportant safety notes for the SPORT han-dling mode (Ypage 68).
RESP®only improves driving stability to alimited degree. The engine's torque is only
restricted to a limited degree and the drivewheels can spin. Further information about
ESP®(Ypage 68).
Drive program S+ (Sport Plus)
Drive programS+is characterized by the fol-lowing:
Rthe vehicle exhibits particularly sporty driv-ing characteristics.
Rthe vehicle pulls away in first gear.
Rthe automatic transmission shifts up later.The fuel consumption possibly being higheras a result of the later automatic transmis-sion shift points.
Rthe suspension exhibits particularly firmdamping settings.
Rgliding mode is not available.
Rthe ECO start/stop function is not available.
RESP®provides the optimum compromisebetween traction and stability. Further infor-
mation about ESP®(Ypage 66).
Drive program S (Sport)
Drive programSis characterized by the follow-ing:
Rthe vehicle exhibits sporty driving character-istics.
Rthe vehicle pulls away in first gear.
Rthe automatic transmission shifts up later.The fuel consumption possibly being higheras a result of the later automatic transmis-sion shift points.
Rthe suspension exhibits particularly firmdamping settings.
Rgliding mode is not available.
Rthe ECO start/stop function is not available.
RESP®provides the optimum compromisebetween traction and stability. Further infor-
mation about ESP®(Ypage 66).
Drive program C (Comfort)
Drive programCis characterized by the follow-ing:
Rthe vehicle delivers comfortable, economicalhandling characteristics.
Rthe vehicle pulls away more gently inforward and reverse gears, unless the accel-erator pedal is depressed fully.
Rthe vehicle has improved driving stability,for example on slippery road surfaces.
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economical driving. A higher level indicates amore economical driving style. If the threeouter areas are completely filled at the sametime, the driver has adopted the most eco-nomical driving style for the selected settingsand prevailing conditions. The ECO displayborder lights up.
The ECO display does not indicate the actualfuel consumption. The additionally achievedrange displayed underBonus fr. startBonus fr. startdoesnot indicate a fixed consumption reduction.
In addition to driving style, the actual con-sumption is affected by other factors, such as:
Rload
Rtire pressure
Rcold start
Rchoice of route
Ractive electrical consumers
These factors are not included in the ECO dis-play.
An economical driving style specially requiresdriving at moderate engine speeds.
Achieving a higher value in the categories"Acceleration" and "Constant":
Robserve the gearshift recommendations.
Rdrive the vehicle in drive programCorE.
In urban traffic and stop-start traffic, drive pro-gramCis recommended.
On long journeys at a constant speed, e.g. onthe highway, only the outer area for "constant"will change.
The ECO display summarizes the driving stylefrom the start of the journey to its completion.Therefore, there are more marked changes inthe outer areas at the start of a journey. Onlonger journeys, there are fewer changes. Formore marked changes, perform a manual rest(Ypage 194).
Further information on the ECO display(Ypage 193).
Braking
Important safety notes
GWARNING
If you shift down on a slippery road surface
in an attempt to increase the engine's brak-
ing effect, the drive wheels could lose their
grip. There is an increased danger of skid-
ding and accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients
!On long, steep gradients, you must reducethe load on the brakes. To use engine brak-ing, shift to a lower gear in good time. Thishelps you to avoid overheating the brakesand wearing them out excessively.
When making use of the engine brakingeffect, it is possible that a drive wheel maynot turn for some time, e.g. in the case ofsuddenly changing or slippery road surfaceconditions. This could cause damage to thedrive train. This type of damage is not cov-ered by the Mercedes-Benz warranty.
Change into a lower gear in good time on longand steep downhill gradients. This is especiallyimportant if the vehicle is laden.
This also applies if you have activated cruisecontrol or Active Distance Assist DISTRONIC.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal
while driving, the braking system can over-
heat. This increases the stopping distance
and can even cause the braking system to
fail. There is a risk of an accident.
Never use the brake pedal as a footrest.
Never depress the brake pedal and the
accelerator pedal at the same time.
!Depressing the brake pedal constantlyresults in excessive and premature wear tothe brake pads.
If the brakes have been subjected to a heavyload, do not stop the vehicle immediately, butdrive on for a short while. This allows the air-flow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rainwithout braking, there may be a delayed reac-tion from the brakes when braking for the first
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time. This may also occur after the vehicle hasbeen washed or driven through deep water.
You then have to depress the brake pedalmore firmly. Maintain a greater distance fromthe vehicle in front.
After driving on a wet road or having the vehi-cle washed, brake firmly while paying attentionto the traffic conditions. This will warm up thebrake discs, thereby drying them more quicklyand protecting them against corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt resi-due may form on the brake discs and brakepads. This can result in a significantly longerbraking distance.
RIn order to prevent any salt build-up, applythe brakes occasionally while paying atten-tion to the traffic conditions.
RCarefully depress the brake pedal and thebeginning and end of a journey.
RMaintain a greater distance to the vehicleahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up inthe instrument cluster and
Ryou hear a warning tone while the engineis running
Observe additional warning messages in themultifunction display.
The brake fluid level may be too low due tobrake pad wear or leaking brake lines.
Have the brake system checked immedi-ately. Consult a qualified specialist work-shop to arrange this.
!As the ESP®system operates automati-cally, the engine and the ignition must beswitched off (the SmartKey must be in posi-tion

Problems with Parking Assist PARKTRONIC
ProblemPossible causes/consequences andPPSolutions
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. You alsohear a warning tone forapproximately two sec-onds.
Parking AssistPARKTRONIC is deacti-vated after approx-imately five secondsand the indicator lampin the Parking AssistPARKTRONIC buttonlights up.
Parking Assist PARKTRONIC has malfunctioned and has been deac-tivated.
XIf problems persist, have Parking Assist PARKTRONIC checked ata qualified specialist workshop.
Only the red segmentsin the Parking AssistPARKTRONIC warningdisplays are lit. ParkingAssist PARKTRONIC isdeactivated afterapproximately five sec-onds.
The Parking Assist PARKTRONIC sensors are dirty or there is inter-ference.
XClean the Parking Assist PARKTRONIC sensors (Ypage 275).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-sound waves.
XCheck to see if Parking Assist PARKTRONIC works at a differentlocation.
Active Parking Assist
General notes
Active Parking Assist is an electronic parkingaid with ultrasound. It measures the road onboth sides of the vehicle. A parking symbolindicates a suitable parking space. Activesteering intervention can assist you duringparking and when exiting a parking space. Youcan also still use Parking Assist PARKTRONIC(Ypage 172).
Important safety notes
Active Parking Assist is merely an aid. It is nota replacement for your attention to your imme-diate surroundings. You are always responsi-ble for safe maneuvering, parking and exiting aparking space. Make sure that no persons, ani-mals or objects are in the path of your vehicle.
When Parking Assist PARKTRONIC is deactiva-ted, Active Parking Assist is also unavailable.
GWARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
cause you to collide with other road users or
objects. There is a risk of an accident.
Pay attention to other road users or objects.
Stop the vehicle if necessary or cancel the
Active Parking Assist parking procedure.
GWARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
cause you to collide with other road users or
objects. There is a risk of an accident.
Pay attention to other road users or objects.
Stop the vehicle if necessary or cancel the
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Under the following circumstances, the rearview camera will not function, or will functionin a limited manner:
Rif the trunk lid is open
Rin heavy rain, snow or fog
Rat night or in very dark places
Rif the camera is exposed to very bright light
Rif the area is lit by fluorescent bulbs or LEDlighting (the display may flicker)
Rif there is a sudden change in temperature,e.g. when driving into a heated garage inwinter
Rif the camera lens is dirty or obstructed.Observe the notes on cleaning(Ypage 275)
Rif the rear of your vehicle is damaged. In thiscase, have the camera position and settingchecked at a qualified specialist workshop.
The field of vision and other functions of therear view camera may be restricted due toadditional accessories on the rear of the vehi-cle (e.g. license plate holder, bicycle rack).
On vehicles with height-adjustable chassis,leaving the standard height can result in inac-curacies in the guide lines, depending on tech-nical conditions.
iThe contrast of the display may be affec-ted by the sudden presence of sunlight orother light sources, e.g. when exiting agarage. Pay particular attention in this situa-tion.
iIf usability is severely restricted, e.g. dueto pixel errors, have the display repaired orreplaced.
Activating/deactivating the rear view
camera
XTo activate:make sure that the SmartKeyis in positionHin the ignition lock.
XMake sure that theActivation by R gearActivation by R gearfunction is selected in the multimedia sys-tem; see the Digital Operator's Manual.
XEngage reverse gear.The multimedia system shows the areabehind the vehicle with guide lines.
The image from the rear view camera isavailable throughout the maneuvering proc-ess.
To deactivate:the rear view camera deacti-vates if you shift the transmission to position], or after driving forwards a short distance.
The inner segments of the warning indicatorare displayed in red if there is a complete sys-tem failure. The indicator lamp in thePARKTRONIC button lights up.
If the system fails at the rear of the vehicle:
Rthe rear segments are shown in red whenbacking up.
Rthe rear segments are hidden when drivingforwards.
Displays in the multimedia system
The rear view camera may show a distortedview of obstacles, show them incorrectly ornot at all. The rear view camera does not showobjects in the following positions:
Rvery close to the rear bumper
Runder the rear bumper
Rin close range above the handle on the trunklid
!Objects not at ground level may appear tobe further away than they actually are, e.g.:
Rthe bumper of a parked vehicle
Rthe drawbar of a trailer
Rthe ball coupling of a trailer tow hitch
Rthe rear section of an HGV
Ra slanted post
Use the guidelines only for orientation.Approach objects no further than the bot-tom-most guideline.
CYellow guide line at a distance of approx-imately 13 ft (4.0 m) from the rear area
DWhite guide line without steering input –vehicle width including the exterior mirrors(static)
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Due to the nature of the system:
Rwarnings may be issued in error when driv-ing close to crash barriers or similar solidlane borders.
Rwarnings may be interrupted when drivingalongside particularly long vehicles, e.g.trucks, for a prolonged time.
Indicator and warning display
CYellow indicator lamp/red warning lamp
Active Blind Spot Assist is not active at speedsbelow approximately 20 mph (30 km/h). Vehi-cles in the monitoring range are then not indi-cated.
When Active Blind Spot Assist is activated,indicator lampCin the exterior mirrors lightsup yellow at speeds of up to 20 mph(30 km/h). At speeds above 20 mph(30 km/h), the indicator lamp goes out andActive Blind Spot Assist is operational.
If a vehicle is detected within the monitoringrange at speeds above approximately 20 mph(30 km/h), warning lampCon the corre-sponding side lights up red. This warningalways occurs when a vehicle enters the moni-toring range from behind or from the side.When you overtake a vehicle, the warning onlyoccurs if the difference in speed is less than7 mph (12 km/h).
The yellow indicator lamp goes out if reversegear is engaged. In this event, Active BlindSpot Assist is no longer active.
The brightness of the indicator/warning lampsis adjusted automatically according to theambient light.
Visual and acoustic collision warning
If you switch on the turn signals to changelanes and a vehicle is detected in the sidemonitoring range, you receive a visual andacoustic collision warning. You will then hear a
double warning tone and red warning lampCflashes. If the turn signal remains on, detectedvehicles are indicated by the flashing of redwarning lampC. There are no further warningtones.
Course-correcting brake application
If Active Blind Spot Assist detects a risk of alateral collision in the monitoring range, acourse-correcting brake application is carriedout. This is meant to assist you in avoiding acollision.
GWARNING
A course-correcting brake application can-
not always prevent a collision. There is a risk
of an accident.
Always steer, brake or accelerate yourself,
especially if Active Blind Spot Assist warns
you or makes a course-correcting brake
application. Always maintain a safe distance
at the sides.
If a course-correcting brake applicationoccurs, red warning lampCflashes in theexterior mirror and a dual warning tonesounds. In addition, displayDunderlining thedanger of a side collision appears in the multi-function display.
In very rare cases, the system may make aninappropriate brake application. A course-cor-recting brake application may be interruptedat any time, e.g. if you steer slightly in theopposite direction or depress the acceleratorpedal more firmly.
The course-correcting brake application isavailable in the speed range between 20 mph(30 km/h) and 120 mph (200 km/h).
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