2019 MERCEDES-BENZ SL CLASS lock

Occupant Classification System
(OCS)
Introduction
The Occupant Classification System (OCS) cat-egorizes the person in the front-passengerseat. Depending on that result, the front-passenger front air bag and front-passengerknee bag are either enabled or deactivated.
The system does not deactivate:
Rthe side impact air bag
Rthe headbag
Rthe Emergency Tensioning Devices
Requirements
To be classified correctly, the front passengermust sit:
Rwith the seat belt fastened correctly
Rin an almost upright position with their backagainst the seat backrest
Rwith their feet resting on the floor, if possi-ble
If the front passenger does not observe theseconditions, OCS may produce a false classifi-cation, e.g. because the front passenger:
Rtransfers their weight by supporting them-selves on a vehicle armrest
Rsits in such a way that their weight is raisedfrom the seat cushion
If you install a child restraint system on thefront-passenger seat, be sure to observe thecorrect positioning of the child restraint sys-tem. Never place objects under or behind thechild restraint system, e.g. a cushion. Fullyretract the seat cushion length. The entirebase of the child restraint system must alwaysrest on the seat cushion of the front-passenger seat. The backrest of the forward-facing child restraint system must lie as flat aspossible against the backrest of the front-passenger seat.
The child restraint system must not touch theroof or be subjected to a load by the headrestraint. Adjust the angle of the seat backrestand the head restraint position accordingly.
Only then can OCS be guaranteed to functioncorrectly. Always observe the child restraintsystem manufacturer's installation and operat-ing instructions.
Occupant Classification System opera-
tion (OCS)
CPASSENGER AIR BAG ON indicator lamp
DPASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether thefront-passenger front air bag is deactivated orenabled.
XPress the Start/Stop button once or twice,or turn the SmartKey to positionGorHinthe ignition lock.The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF andPASSENGER AIR BAG ON indicator lamps mustlight up simultaneously for approximately sixseconds.
The indicator lamps display the status of thefront-passenger front air bag.
RPASSENGER AIR BAG ON lights up for60 seconds, subsequently both indicatorlamps are off (PASSENGER AIR BAG ON andOFF): the front-passenger front air bag isable to deploy in the event of an accident.
RPASSENGER AIR BAG OFF lights up: thefront-passenger front air bag is deactivated.It will then not be deployed in the event ofan accident.
If the PASSENGER AIR BAG ON indicator lampis off, only the PASSENGER AIR BAG OFF indi-cator lamp shows the status of the front-passenger front air bag. The PASSENGER AIRBAG OFF indicator lamp may be lit continu-ously or be off.
If the status of the front-passenger front airbag changes while the vehicle is in motion, anair bag display message appears in the instru-ment cluster (Ypage 215). When the front-passenger seat is occupied, always pay atten-tion to the PASSENGER AIR BAG OFF indicatorlamp. Be aware of the status of the front-
48Occupant safety
Safety

Rsetting a more favorable seat position forthe front-passenger seat.
Rvehicles with a multicontour seat: increasingthe air pressure in the side bolsters of theseat backrest.
!Make sure that there are no objects in thefootwell or behind the seats. There is a dan-ger that the seats and/or objects could be
damaged when PRE-SAFE®is activated.
Should an accident not occur, the preventativemeasures taken are reversed. Certain settingsmust be made yourself.
XIf the seat belt pre-tensioning is notreduced, move the seat backrest backslightly.Seat belt pre-tensioning is released.
PRE-SAFE®PLUS (anticipatory occu-
pant protection system PLUS)
Introduction
PRE-SAFE®PLUS is only available in vehicleswith the Driving Assistance package.
Using the radar sensor system, PRE-SAFE®
PLUS is able to detect that a head-on or rear-end collision is imminent. In certain hazardous
situations, PRE-SAFE®PLUS takes pre-emptivemeasures to protect the vehicle occupants.
Important safety notes
The intervention of PRE-SAFE®PLUS cannotprevent an imminent collision.
The driver is not warned about the intervention
of PRE-SAFE®PLUS.
PRE-SAFE®PLUS does not intervene if thevehicle is backing up.
When driving, or when parking or exiting aparking space using Active Parking Assist,
PRE-SAFE®PLUS will not apply the brakes.
Function
PRE-SAFE®PLUS intervenes in certain situa-tions if the radar sensor system detects animminent head-on or rear-end collision.
PRE-SAFE®PLUS takes the following meas-ures depending on the hazardous situationdetected:
Rif the radar sensor system detects that ahead-on collision is imminent, the seat beltsare pre-tensioned.
Rif the radar sensor system detects that arear-end collision is imminent:
-the brake pressure is increased if thedriver applies the brakes when the vehicleis stationary.
-the seat belts are pre-tensioned.
The PRE-SAFE®PLUS braking application iscanceled:
Rif the accelerator pedal is depressed when agear is engaged
Rif the risk of a collision passes or is no lon-ger detected
Rif Active Distance Assist DISTRONIC indi-cates an intention to intervene
If the hazardous situation passes withoutresulting in an accident, the original settingsare restored.
Automatic measures after an acci-
dent
Immediately after an accident, the followingmeasures are implemented, depending on thetype and severity of the impact:
Rthe hazard warning lamps are switched on
Rthe emergency lighting is activated
Rthe vehicle doors are unlocked
Rthe front side windows are lowered
Rthe electrically adjustable steering wheel israised when the driver's door is opened
Rthe engine is switched off and the fuel sup-ply is cut off
Rvehicles with Mercedes me connect: auto-matic emergency call
56Occupant safety
Safety

Children in the vehicle
Important safety notes
If a child younger than twelve years old andunder 5 ft (1.50 m) in height is traveling in thevehicle:
Ralways secure the child in a child restraintsystem suitable for Mercedes-Benz vehicles.The child restraint system must be appropri-ate to the age, weight and size of the child.
Rbe sure to observe the instructions andsafety notes in this section in addition to thechild restraint system manufacturer's instal-lation instructions.
Ralways observe the instructions and safetynotes on the "Occupant classification sys-tem (OCS)". (Ypage 48)
GWARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
Rrelease the parking brake.
Rshift the automatic transmission out of
the parking positionP.
Rstart the engine.
In addition, they may operate vehicle equip-
ment and become trapped. There is a risk of
an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle.
Never leave children unsupervised in the
vehicle.
GWARNING
If persons, particularly children are subjec-
ted to prolonged exposure to extreme heat
or cold, there is a risk of injury, possibly
even fatal. Never leave children unattended
in the vehicle.
GWARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularly on the metal parts of the child
restraint system. There is a risk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to direct sunlight.
Protect it with a blanket, for example. If the
child restraint system has been exposed to
direct sunlight, let it cool down before secur-
ing the child in it. Never leave children unat-
tended in the vehicle.
Always ensure that all vehicle occupants havetheir seat belts fastened correctly and are sit-ting properly. Particular attention must be paidto children.
Observe the safety notes on the seat belt(Ypage 42) and the notes on correct use ofseat belts (Ypage 43).
A booster seat may be necessary to achieveproper seat belt positioning for children over40 lbs(18 kg)until they reach a height wherea three-point seat belt can be properly fas-tened without a booster seat.
Special seatbelt retractor
GWARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt
retractor is disabled and the inertia real
draws in a portion of the seat belt. The seat
belt cannot be immediately refastened.
There is an increased risk of injury, possibly
even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reacti-
vate the special seat belt retractor and
secure the child restraint system properly.
The seat belt on the front-passenger's side isequipped with a special seat belt retractor.When activated, the special seat belt retractorensures that the seat belt cannot slacken oncethe child seat is secured.
Children in the vehicle57
Safety
Z

Always secure animals properly when driv-
ing, for instance with a suitable pet carrier.
Driving safety systems
Overview of driving safety systems
In this section, you will find information aboutthe following driving safety systems:
RABS (Anti-lockBrakingSystem)(Ypage 60)
RBAS (BrakeAssistSystem) (Ypage 61)
RBrake Assist with cross-traffic function(Ypage 61)
RActive Brake Assist (Ypage 63)
RAdaptive brake lights (Ypage 65)
RESP®(ElectronicStabilityProgram)(Ypage 65)
REBD (ElectronicBrake forceDistribution)(Ypage 69)
RADAPTIVE BRAKE (Ypage 70)
RActive Brake Assist with cross-traffic func-tion (Ypage 70)
RSTEER CONTROL (Ypage 72)
Important safety notes
If you fail to adapt your driving style or if youare inattentive, the driving safety systems canneither reduce the risk of an accident noroverride the laws of physics. Driving safetysystems are merely aids designed to assistdriving.
You are responsible for maintaining the dis-tance to the vehicle in front, for vehicle speed,for braking in good time, and for staying inlane. Always adapt your driving style to suitthe prevailing road and weather conditions andmaintain a safe distance from the vehicle infront. Drive carefully.
The driving safety systems described onlywork as effectively as possible when there isadequate contact between the tires and theroad surface. Pay particular attention to theinformation regarding tires, recommendedminimum tire tread depths etc. in the "Wheelsand tires" section (Ypage 293).
In wintry driving conditions, always use wintertires (M+S tires) and if necessary, snow
chains. Only in this way will the driving safetysystems described in this section work aseffectively as possible.
ABS (Anti-lock Braking System)
General information
ABS regulates brake pressure in such a waythat the wheels do not lock when you brake.This allows you to continue steering the vehi-cle when braking.
The%ABS warning lamp in the instrumentcluster lights up when the ignition is switchedon. It goes out when the engine is running.
ABS works from a speed of about 5 mph(8 km/h), regardless of road-surface condi-tions. ABS works on slippery surfaces, evenwhen you only brake gently.
Important safety notes
iObserve the "Important safety notes" sec-tion (Ypage 60).
GWARNING
If ABS is malfunctioning, the wheels could
lock when braking. The steerability and
braking characteristics would be severely
affected. There is an increased danger of
skidding and accidents.
Drive on carefully. Have ABS checked imme-
diately at a qualified specialist workshop.
When ABS is malfunctioning, other systems,including driving safety systems, will alsobecome inoperative. Observe the informationon the ABS warning lamp (Ypage 236) anddisplay messages which may be shown in theinstrument cluster (Ypage 206).
Brakes
XIf ABS intervenes:continue to depress thebrake pedal vigorously until the braking sit-uation is over.
XTo make a full brake application:depressthe brake pedal with full force.
If ABS intervenes when braking, you will feel apulsing in the brake pedal.
60Driving safety systems
Safety

The pulsating brake pedal can be an indicationof hazardous road conditions, and functions asa reminder to take extra care while driving.
BAS (Brake Assist System)
General information
BAS operates in emergency braking situations.If you depress the brake pedal quickly, BASautomatically boosts the braking force, thusshortening the stopping distance.
Important safety notes
iObserve the "Important safety notes" sec-tion (Ypage 60).
GWARNING
If BAS is malfunctioning, the braking dis-
tance in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking
XKeep the brake pedal firmly depressed untilthe emergency braking situation is over.ABS prevents the wheels from locking.
The brakes will function as usual once yourelease the brake pedal. BAS is deactivated.
Brake Assist with cross-traffic func-
tion
General information
Brake Assist with cross-traffic function canhelp you to minimize the risk of a collision witha vehicle or a pedestrian and reduce theeffects of such a collision. If Brake Assist withcross-traffic function detects a danger of colli-sion, you are assisted when braking.
iObserve the "Important safety notes" sec-tion (Ypage 60).
Brake Assist with cross-traffic function is onlyavailable in vehicles with the Driving Assis-tance package.
For Brake Assist with cross-traffic function toassist you when driving, the radar sensor sys-tem and the camera system must be opera-tional.
The sensor system and camera system helpBrake Assist with cross-traffic function detectobstacles:
Rthat are in the path of your vehicle for anextended period of time
Rthat cross the path of your vehicle
In addition, pedestrians in the path of yourvehicle can be detected.
Brake Assist with cross-traffic function detectspedestrians using typical characteristics suchas body contours and the posture of a personstanding upright.
If the radar sensor system or the camera sys-tem is malfunctioning, Brake Assist with cross-traffic function is restricted or no longer availa-ble. The brake system is still available withcomplete brake boosting effect and BAS.
iObserve the restrictions described in the"Important safety notes" section(Ypage 61).
Important safety notes
GWARNING
Active Brake Assist with cross-traffic func-
tion cannot always clearly identify objects
and complex traffic situations.
In such cases, Active Brake Assist with
cross-traffic function might:
Rissue an unnecessary warning or brake
Rissue no warning or not brake
Always pay careful attention to the traffic
situation; do not rely on the Active Brake
Assist with cross-traffic function alone.
Always be ready to brake and possibly take
evasive action.
GWARNING
Brake Assist with cross-traffic function can-
not always clearly identify people, particu-
larly if they are moving. Brake Assist with
cross-traffic function cannot intervene in
these cases. There is a risk of an accident.
Driving safety systems61
Safety
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Up to a speed of approximately 44 mph(70 km/h), Brake Assist with cross-trafficfunction may react to:
Rstationary objects in the path of your vehi-cle, e.g. stopped or parked vehicles
Rpedestrians in the path of your vehicle
Robstacles crossing your path which move inthe detection range of the sensors and aredetected
iIf Brake Assist with cross-traffic functionrequires a particularly high braking force,preventative passenger protection measures
(PRE-SAFE®) are activated at the same time(Ypage 55).
XKeep the brake pedal depressed until theemergency braking situation is over.ABS prevents the wheels from locking.
Brake Assist with cross-traffic function isdeactivated and the brakes function as usualagain if:
Ryou release the brake pedal
Rthere is no longer a risk of collision
Rno obstacle is detected in front of your vehi-cle
Ryou depress the accelerator pedal
Ryou activate kickdown
Active Brake Assist
General information
iObserve the "Important safety notes" sec-tion (Ypage 60).
Active Brake Assist consists of a distancewarning function with an autonomous brakingfunction and Adaptive Brake Assist.
Active Brake Assist can help you to minimizethe risk of a collision with the vehicle in frontor reduce the effects of such a collision.
If Active Brake Assist detects that there is arisk of collision, you will be warned visuallyand acoustically. If you do not react to the vis-ual collision warning or the warning tone,autonomous braking can be initiated in criticalsituations. If you apply the brake yourself in acritical situation, Adaptive Brake Assist of theActive Brake Assist system supports you.
Important safety notes
In particular, the detection of obstacles can beimpaired if:
Rthere is dirt on the sensors or anything elsecovering the sensors
Rthere is snow or heavy rain
Rthere is interference by other radar sources
Rthere are strong radar reflections, for exam-ple in parking garages
Ra narrow vehicle is traveling in front, e.g. amotorbike
Ra vehicle is traveling in front on a differentline
Ryou are driving a new vehicle or servicing onthe Active Brake Assist system has justbeen carried out
Observe the important safety notes in the"Breaking-in notes" section (Ypage 125).
Following damage to the front end of the vehi-cle, have the configuration and operation ofthe radar sensor checked at a qualified spe-cialist workshop. This also applies to collisionsat slow speeds where there is no visible dam-age to the front of the vehicle.
Activating/deactivating
Active Brake Assist is automatically activeafter switching on the ignition.
You can activate or deactivate Active BrakeAssist using the on-board computer(Ypage 198). When deactivated, the distancewarning function and the autonomous brakingfunction are also deactivated.
If Active Brake Assist is deactivated, the

Adaptive Brake Assist provides braking assis-tance in hazardous situations at speeds above4 mph (7 km/h). It uses radar sensor technol-ogy to assess the traffic situation.
Up to a speed of approximately 155 mph(250 km/h), Adaptive Brake Assist is capableof reacting to moving objects that havealready been detected as such at least onceover the period of observation.
Up to a speed of approximately 44 mph(70 km/h), Adaptive Brake Assist reacts tostationary obstacles.
If Adaptive Brake Assist demands particularlyhigh braking force, preventative passenger
protection measures (PRE-SAFE®) are activa-ted simultaneously (Ypage 55).
XKeep the brake pedal depressed until theemergency braking situation is over.ABS prevents the wheels from locking.
The brakes will work normally again if:
Ryou release the brake pedal
Rthere is no longer any danger of a collision
Rno obstacle is detected in front of your vehi-cle
Adaptive Brake Assist is then deactivated.
Important safety notes
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake. Terminate
the intervention in a non-critical driving sit-
uation.
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As a result, the Adaptive Brake Assist may
not intervene in all critical conditions. There
is a risk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
Always adapt your speed to suit the prevail-
ing road and traffic conditions.
Due to the nature of the system, particularlycomplicated but non-critical driving conditionsmay also cause Adaptive Brake Assist to inter-vene.
If Adaptive Brake Assist is not available due toa malfunction in the radar sensor system, thebrake system remains available with full brakeboosting effect and BAS.
Adaptive brake lights
iObserve the "Important safety notes" sec-tion (Ypage 60).
If you brake sharply from a speed of more than50 km/h or if braking is assisted by BAS orBrake Assist with Cross-Traffic Assist, thebrake lamps flash rapidly. In this way, traffictraveling behind you is warned in an evenmore noticeable manner.
If you brake sharply from a speed of more than70 km/h to a standstill, the hazard warninglamps are activated automatically. If thebrakes are applied again, the brake lamps lightup continuously. The hazard warning lampsswitch off automatically if you travel fasterthan 10 km/h. You can also switch off thehazard warning lamps using the hazard warn-ing button (Ypage 111).
ESP®(Electronic Stability Program)
General notes
iObserve the "Important safety notes" sec-tion (Ypage 60).
ESP®monitors driving stability and traction,i.e. power transmission between the tires andthe road surface.
If ESP®detects that the vehicle is deviatingfrom the direction desired by the driver, one ormore wheels are braked to stabilize the vehi-cle. The engine output is also modified to keep
Driving safety systems65
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Up to a speed of approximately 44 mph(70 km/h), Active Brake Assist with cross-traf-fic function may react to:
Rstationary objects in the path of your vehi-cle, e.g. stopped or parked vehicles
Rpedestrians in the path of your vehicle
iIf there is an increased risk of a collision,preventive passenger protection measures
(PRE-SAFE®) are triggered (Ypage 55).
If the risk of collision with the vehicle in frontremains and you do not brake, take evasiveaction or accelerate significantly, the vehiclemay perform automatic emergency braking, upto the point of full brake application. Auto-matic emergency braking is not performeduntil immediately prior to an imminent acci-dent.
You can prevent the intervention of ActiveBrake Assist with cross-traffic function at anytime by:
Rdepressing the accelerator pedal further
Ractivating kickdown
Rreleasing the brake pedal
The braking application of Active Brake Assistwith cross-traffic function is ended automati-cally if:
Ryou maneuver to avoid the obstacle
Rthere is no longer a risk of collision
Ran obstacle is no longer detected in front ofyour vehicle
STEER CONTROL
General information
STEER CONTROL helps you by transmitting anoticeable steering force to the steering wheelin the direction required for vehicle stabiliza-tion.
This steering assistance is provided in particu-lar if:
Rboth right wheels or both left wheels are ona wet or slippery road surface when youbrake
Rthe vehicle starts to skid
Important safety notes
iObserve the "Important safety notes" sec-tion (Ypage 60).
No steering support is provided from STEERCONTROL, if:
RESP®is deactivated
RESP®is malfunctioning
Rthe steering is faulty
If ESP®is malfunctioning, you will be assistedfurther by the electrical power steering.
Protection against theft
Immobilizer
XTo activate with the SmartKey:removethe SmartKey from the ignition lock.
XTo activate with KEYLESS-GO:switch theignition off and open the driver's door.
XTo deactivate:switch on the ignition.
The immobilizer prevents your vehicle frombeing started without the correct SmartKey.
When leaving the vehicle, always take theSmartKey with you and lock the vehicle. Theengine can be started by anyone with a validSmartKey that is left inside the vehicle.
iThe immobilizer is always deactivatedwhen you start the engine.
In the event that the engine cannot be star-ted (yet the vehicle's battery is charged),the system is not operational. Contact anauthorized Mercedes-Benz Center or call1-800-FOR-MERCedes (in the USA) or1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
72Protection against theft
Safety