lights MERCEDES-BENZ SL CLASS 2019 Owner's Guide

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andPPSolutions
The indicator lamp intheZbutton flashesthree times or remainsoff. The "Cooling withair dehumidification"function cannot beswitched on.
Cooling with air dehumidification has been deactivated due to amalfunction.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
In automatic mode, the set temperature ismaintained automatically at a constant level.The system automatically regulates the tem-perature of the dispensed air, the airflow andthe air distribution.
The automatic mode functions optimally whenthe "Cooling with air dehumidification" func-tion is activated. If necessary, cooling with airdehumidification can be deactivated.
If you deactivate the "Cooling with air-dehu-midification" function, the air inside the vehiclewill not be cooled. The air inside the vehiclewill also not be dehumidified. The windows canfog up more quickly. Therefore, deactivate thecooling with air-dehumidification function onlybriefly.
Automatic control
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 126).
XSet the desired temperature.
XTo activate:press theXbutton.The indicator lamp in theXbutton lightsup. Automatic air distribution and airflow areactivated.
iWhen automatic mode is enabled, the cli-mate mode can be selected (Ypage 119).
XTo switch to manual mode:press the

Switching air-recirculation mode
on/off
General notes
If you switch on air-recirculation mode, thewindows can fog up more quickly, in particularat low temperatures. Only use air-recirculationmode briefly to prevent the windows from fog-ging up.
Activating/deactivating
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 126).
XTo activate:press therbutton.The indicator lamp in therbutton lightsup.
iAir-recirculation mode is automaticallyactivated at high levels of pollution or athigh outside temperatures. When air-recir-culation mode is activated automatically,the indicator lamp in therbutton is notlit. Outside air is added after about30 minutes.
XTo deactivate:press therbutton.The indicator lamp in therbutton goesout.
iAir-recirculation mode deactivates auto-matically:
Rafter approximately five minutes at out-side temperatures below approximately41 ‡ (5 †)
Rafter approximately five minutes if coolingwith air dehumidification is deactivated
Rafter approximately 30 minutes at outsidetemperatures above approximately 41 ‡(5 †) if the "Cooling with air dehumidifi-cation" function is activated
Switching the residual heat on or off
General notes
The residual heat function is only available onvehicles for Canada.
It is possible to make use of the residual heatof the engine to continue heating the station-ary vehicle for up to 30 minutes after theengine has been switched off. The heatingtime depends on the set interior temperature.
Activating/deactivating
XTurn the SmartKey to position

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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Rthe system detects that the windshield isnot fogged up when the air-conditioning sys-tem is switched on
Rthe hood is closed
Rthe driver's door is closed and the driver'sseat belt is fastened
All of the vehicle's systems remain activewhen the engine is stopped automatically.
All vehicles (except Mercedes-AMG vehi-cles):automatic engine switch-off can takeplace a maximum of four times in a row (initialstop, then three subsequent stops).
Mercedes-AMG vehicles:the number of con-secutive automatic engine switch-offs isunlimited.
The HOLD function can be activated if theengine has been switched off automatically. Itis then not necessary to continue applying thebrakes during the automatic stop phase. Whenyou depress the accelerator pedal, the enginestarts automatically and the braking effect ofthe HOLD function is deactivated.
Automatic engine start
The engine starts automatically if:
Ryou switch off the ECO start/stop functionby pressing the ECO button
Rin transmission position[or\\, the brakepedal is released and the HOLD function isnot active
Ryou depress the accelerator pedal
Ryou engage reverse gear^
Ryou move the transmission out of position]
Ryou switch to drive programS+
Ryou switch to drive programSorM(Mercedes-AMG vehicles)
Ryou unfasten your seat belt or open the driv-er's door
Rthe vehicle starts to roll
Rthe brake system requires this
Rthe temperature in the vehicle interior devi-ates from the set range
Rthe system detects moisture on the wind-shield when the air-conditioning system isswitched on
Rthe battery's condition of charge is too low
Shifting the transmission to position]doesnot start the engine.
Deactivating or activating the ECO
start/stop function
All vehicles (except Mercedes-AMG vehi-
cles)
XTo deactivate:press ECO buttonC.Indicator lampDgoes out.
XTo activate:press ECO buttonC.Indicator lampDlights up.
If indicator lampDis off, the ECO start/stopfunction has been deactivated manually or asthe result of a malfunction. The engine willthen not be switched off automatically whenthe vehicle stops.
Mercedes-AMG vehicles
XTo deactivate:in drive programC, pressECO buttonC.
or
XSwitch to drive programS,S+orM(Ypage 133).Indicator lampDgoes out.
XTo activate:press ECO buttonC.Indicator lampDlights up.
130Driving
Driving an d parking

Selecting the drive program
XTurn DYNAMIC SELECT controllerCasmany times as necessary until the desireddrive program is selected.The symbol of the selected drive program isshown in the multifunction display.
In addition, the current drive program set-tings are displayed briefly in the multimediasystem display.
The drive program indicator on DYNAMICSELECT controllerClights up in red.
Additional information for drive programs(Ypage 138).
Additional settings
CECO start/stop function (Ypage 129)
DESP®(Ypage 65)

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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Applying or releasing manually
XTo apply:push handleC.When the electric parking brake is applied,the redI(USA only) or$(Canadaonly) indicator lamp lights up in the instru-ment cluster.
The electric parking brake can also beapplied when the SmartKey is removed.
XTo release:pull handleC.The redI(USA only) or$(Canadaonly) indicator lamp in the instrument clus-ter goes out.
The electric parking brake can only bereleased:
Rwhen the SmartKey is in positionGin theignition lock (Ypage 126) or
Rif the ignition was switched on using theStart/Stop button
Applying automatically
The electric parking brake is automaticallyapplied when the transmission is in position]and:
Rthe engine is switched off or
Rthe driver is not wearing a seat belt and thedriver's door is opened
To prevent the electric parking brake frombeing automatically applied, pull handleC.
The electric parking brake is also applied auto-matically if:
RActive Distance Assist DISTRONIC bringsthe vehicle to a standstill or
Rthe HOLD function is keeping the vehiclestationary
In addition, at least one of the following condi-tions must be fulfilled:
Rthe engine is switched off
Rthe driver is not wearing a seat belt and thedriver's door is opened
Rthere is a system malfunction
Rthe power supply is insufficient
Rthe vehicle is stationary for a lengthy period
The redI(USA only) or$(Canadaonly) indicator lamp in the instrument clusterlights up.
The electric parking brake is not automaticallyapplied if the engine is switched off by theECO start/stop function.
Releasing automatically
The electric parking brake is released auto-matically when all of the following conditionsare fulfilled:
Rthe engine is running
RThe seat belt tongue is engaged in the beltbuckle
Rthe transmission is in position[or^andyou depress the accelerator pedal or shiftfrom position]to[or^
Rif the transmission is in position^, thetrunk lid must be closed
If the seat belt tongue is not engaged in theseat belt buckle, the following conditions mustbe fulfilled:
Rthe driver's door is closed
Ryou move the transmission out of position]or you have previously driven at a speedabove 2 mph (3 km/h)
Rif the transmission is in position^, thetrunk lid must be closed
When the electric parking brake is released,the$indicator lamp goes out in the instru-ment cluster.
Emergency braking
The vehicle can also be braked during anemergency by using the electric parking brake.
XWhile driving, push handleCof the electricparking brake.The vehicle is braked for as long as the han-dle of the electric parking brake is pressed.The longer the electric parking brake handleis depressed, the greater the braking force.
148Parking
Driving and pa rking

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

revealed, Active Distance Assist DISTRONICwill not brake for them.
Crossing vehicles
Active Distance Assist DISTRONIC may mis-takenly detect vehicles that are crossing yourlane.
If you activate Active Distance AssistDISTRONIC under the following conditions, thevehicle could pull away unintentionally:
Rat traffic lights with crossing traffic, forexample
Rif there is a vehicle in front, after a crossing,with the HOLD function activated
Active Distance Assist DISTRONIC with
Active Steering Assist
General notes
Active Distance Assist DISTRONIC with ActiveSteering Assist aids you in keeping the vehiclein the center of the driving lane by means ofmoderate steering interventions in a speedrange from 0 - 125 mph (0 - 200 km/h).
It monitors lane markings and vehicles in frontof your vehicle by means of camera systemCat the top of the windshield.
In a speed range from 0 - 37 mph(0 - 60 km/h), Active Steering Assist focuseson the vehicle in front, taking into accountlane markings, e.g. when following vehicles ina traffic jam.
At speeds of more than 37 mph (60 km/h),Active Steering Assist focuses on clear lanemarkings (left and right), only focusing on thevehicle in front if detected lane markings arenot present at speeds of up to 80 mph(130 km/h).
If these conditions are not present, ActiveSteering Assist cannot provide assistance.
Active Distance Assist DISTRONIC must beactive in order for the function to be available.
Important safety notes
Active Distance Assist DISTRONIC with ActiveSteering Assist can neither reduce the risk ofan accident if you fail to adapt your drivingstyle, nor override the laws of physics. It can-not take into account road, weather or trafficconditions. Active Distance Assist DISTRONICwith Active Steering Assist is only an aid. Youare responsible for the distance to the vehiclein front, for vehicle speed, for braking in goodtime and for staying in your lane.
Active Distance Assist DISTRONIC with ActiveSteering Assist does not detect road and traf-fic conditions and does not detect all roadusers. If you are following a vehicle which isdriving towards the edge of the road, yourvehicle could come into contact with the curbor other road boundaries. Be particularlyaware of other road users, e.g. cyclists, thatare directly next to your vehicle.
Obstacles such as traffic pylons on the lane orprojecting into the lane are not detected.
An inappropriate steering intervention, e.g.after intentionally driving over a lane marking,can be corrected at any time if you steerslightly in the opposite direction.
Active Distance Assist DISTRONIC with ActiveSteering Assist cannot continuously keep yourvehicle in lane. In some cases, the steeringintervention is not sufficient to bring the vehi-cle back to the lane. In such cases, you muststeer the vehicle yourself to ensure that itdoes not leave the lane.
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