2019 MERCEDES-BENZ SL CLASS brake sensor

tics. Have the brake system checked at a
qualified specialist workshop.
Observe information regarding indicator andwarning lamps (Ypage 236) as well as displaymessages (Ypage 208).
ADAPTIVE BRAKE
iObserve the "Important safety notes" sec-tion (Ypage 60).
ADAPTIVE BRAKE enhances braking safety andoffers increased braking comfort. In additionto the braking function, ADAPTIVE BRAKE alsohas the HOLD function (Ypage 165) and hillstart assist (Ypage 129).
Active Brake Assist with cross-traffic
function
General information
Active Brake Assist with cross-traffic functioncan help you to minimize the risk of a collisionwith the vehicle in front or a pedestrian. ActiveBrake Assist with cross-traffic function canalso reduce the effects of such a collision. IfActive Brake Assist with cross-traffic functionhas detected a risk of collision, you will bewarned visually and acoustically as well as byautomatic braking.
iPay attention to the important safety notesin the "Driving safety systems" section(Ypage 60).
Active Brake Assist with cross-traffic functionis only available in vehicles with the DrivingAssistance Plus package.
For Active Brake Assist with cross-traffic func-tion to assist you when driving, the radar sen-sor system and the camera system must beoperational.
The radar sensor system and camera systemhelp Active Brake Assist with cross-trafficfunction to detect obstacles that are in thepath of your vehicle for an extended period oftime.
In addition, pedestrians in the path of yourvehicle can be detected.
Active Brake Assist with cross-traffic functiondetects pedestrians using typical characteris-
tics such as body contours and the posture ofa person standing upright.
iObserve the restrictions described in the"Important safety notes" section(Ypage 70).
Important safety notes
GWARNING
Active Brake Assist with cross-traffic func-
tion will initially brake your vehicle by a par-
tial application of the brakes if a danger of
collision is detected. There may be a colli-
sion unless you brake yourself. Even after
subsequent full application of the brakes a
collision cannot always be avoided, particu-
larly when approaching at too high a speed.
There is a risk of an accident.
Always apply the brakes yourself and try to
take evasive action, provided it is safe to do
so.
If you partially apply the brakes, the vehicle isbraked with up to 50% of the full braking force.
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:
Rgive an unnecessary warning and then
brake the vehicle
Rneither give a warning nor intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, espe-
cially if Active Brake Assist with cross-traffic
function alerts you. Terminate the interven-
tion in a non-critical driving situation.
GWARNING
Active Brake Assist with cross-traffic func-
tion cannot always clearly identify people,
particularly if they are moving. Active Brake
Assist with cross-traffic function cannot
70Driving safety systems
Safety

intervene in these cases. There is a risk of
an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, espe-
cially if Active Brake Assist with cross-traffic
function alerts you.
In order to maintain the appropriate distanceto the vehicle in front and thus prevent a colli-sion, you must apply the brakes yourself.
GWARNING
Active Brake Assist with cross-traffic func-
tion does not react:
Rto small people, e.g. children
Rto animals
Rto oncoming vehicles
Rwhen cornering
As a result, Active Brake Assist with cross-
traffic function may not warn you or engage
in all critical situations. There is a risk of an
accident.
Always pay careful attention to the traffic
situation and be ready to brake.
In the event of snowfall or heavy rain, the rec-ognition can be impaired.
Recognition by the radar sensor system is alsoimpaired if:
Rthere is dirt on the sensors or anything elsecovering the sensors
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
Recognition by the camera system is alsoimpaired in the event of:
Rdirt on the camera or if the camera is cov-ered
Rglare on the camera system, e.g. from thesun being low in the sky
Rdarkness
Ror if:
-pedestrians move quickly, e.g. into thepath of the vehicle
-the camera system no longer recognizes apedestrian as a person due to specialclothing or other objects
-a pedestrian is concealed by otherobjects
-the typical outline of a pedestrian is notdistinguishable from the background
Following damage to the front end of the vehi-cle, have the configuration and operation ofthe radar sensors 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.
Following damage to the windshield, have theconfiguration and operation of the camera sys-tem checked at a qualified specialist work-shop.
Function
XTo activate or deactivate:activate ordeactivate Active Brake Assist with cross-traffic function using the on-board computer(Ypage 198).When Active Brake Assist with cross-trafficfunction is deactivated, the

Notes on breaking-in a new vehicle
Important safety notes
The sensor system of some driving and drivingsafety systems adjusts automatically while acertain distance is being driven after the vehi-cle has been delivered or after repairs. Fullsystem effectiveness is not reached until theend of this teach-in procedure.
New and replaced brake pads and discs onlyreach their optimum braking effect after sev-eral hundred kilometers of driving. Compen-sate for this by applying greater force to thebrake pedal.
The first 1000 miles (1500 km)
The more you look after the engine when it isnew, the more satisfied you will be with itsperformance in the future.
RYou should therefore drive at varying vehicleand engine speeds for the first 1,000 miles(1,500 km).
RAvoid heavy loads, e.g. driving at full throt-tle, during this period.
RChange gear in good time, before the tach-ometer needle is

Active Distance Assist DISTRONIC
General notes
Active Distance Assist DISTRONIC regulatesthe speed and automatically helps you main-tain the distance from the vehicle detected infront. Vehicles are detected with the aid of theradar sensor system. Active Distance AssistDISTRONIC brakes automatically to avoidexceeding the set speed or to maintain thedesignated distance from the vehicle in front.
You must select a lower gear in good time onlong and steep downhill gradients, especially ifthe vehicle is laden. By doing so, you will makeuse of the braking effect of the engine. Thisrelieves the load on the brake system and pre-vents the brakes from overheating and wear-ing too quickly.
If Active Distance Assist DISTRONIC detectsthat there is a risk of a collision with the vehi-cle in front, you will be warned visually andaudibly. Active Distance Assist DISTRONICcannot prevent a collision without your inter-vention. An intermittent warning tone will thensound and the distance warning lamp will lightup in the instrument cluster. Brake immedi-ately in order to increase the distance fromthe vehicle in front, or take evasive action, pro-vided it is safe to do so.
For Active Distance Assist DISTRONIC toassist you when driving, the radar sensor sys-tem must be operational.
Active Distance Assist DISTRONIC operates inthe speed range between 0 mph (0 km/h) and120 mph (200 km/h).
Do not use Active Distance Assist DISTRONICwhile driving on roads with steep gradients.
As Active Distance Assist DISTRONIC trans-mits radar waves, it can resemble the radardetectors of the responsible authorities. Youcan refer to the relevant chapter in the Opera-tor's Manual if questions are asked about this.
iUSA only:
This device has been approved by the FCCas a "Vehicular Radar System". The radarsensor is intended for use in an automotiveradar system only. Removing, tamperingwith, or altering the device will void any war-ranties, and is not permitted by the FCC. Donot tamper with, alter, or use in any non-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
iCanada only: This device complies withRSS-210 of Industry Canada. Operation issubject to the following two conditions:
1. This device may not cause interference,and
2. This device must accept any interferencereceived, including interference that maycause undesired operation of the device.
Removal, tampering, or altering of thedevice will void any warranties, and is notpermitted. Do not tamper with, alter, or usein any non-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
Important safety notes
GWARNING
Active Distance Assist DISTRONIC does not
react to:
Rpeople or animals
Rstationary objects in the road, e.g. stop-
ped or parked vehicles
Roncoming vehicles and crossing traffic
As a result, Active Distance Assist
DISTRONIC may neither give warnings nor
intervene in such situations. There is a risk
of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
GWARNING
Active Distance Assist DISTRONIC does not
react to:
Rpeople or animals
Rstationary objects in the road, e.g. stop-
ped or parked vehicles (vehicles without
the Driving Assistance package)
Rstationary objects in the road, e.g. stop-
ped or parked vehicles, if sufficient detec-
tion is not possible (vehicles with the Driv-
ing Assistance package)
Roncoming vehicles and crossing traffic
156Driving systems
Driving and pa rking

As a result, Active Distance Assist
DISTRONIC may neither give warnings nor
intervene in such situations. There is a risk
of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
GWARNING
Distance keeping assistant cannot always
clearly identify other road users and com-
plex traffic situations.
In such cases, distance keeping assistant
can:
Raccelerate or brake the vehicle unexpect-
edly
Rintervene unexpectedly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, especially if distance keeping assis-
tant warns you.
GWARNING
Active Distance Assist DISTRONIC brakes
your vehicle with up to 50% of the maximum
possible deceleration. If this deceleration is
not sufficient, Active Distance Assist
DISTRONIC alerts you with a visual and
acoustic warning. There is a risk of an acci-
dent.
Adjust your speed in these cases and main-
tain sufficient distance.
Apply the brakes yourself and/or take eva-
sive action.
!When Active Distance Assist DISTRONICor the HOLD function is activated, the vehi-cle brakes automatically in certain situa-tions.
To avoid damage to the vehicle, deactivateActive Distance Assist DISTRONIC and theHOLD function in the following or similar sit-uations:
Rwhen towing the vehicle
Rin the car wash
Active Distance Assist DISTRONIC can neitherreduce the risk of an accident if you fail to
adapt your driving style, nor override the lawsof physics. Active Distance Assist DISTRONICcannot take into account road, weather or traf-fic conditions. Active Distance AssistDISTRONIC is only an aid. You are responsiblefor the distance to the vehicle in front, forvehicle speed, for braking in good time and forstaying in your lane.
Do not use Active Distance Assist DISTRONIC:
RIn road and traffic conditions which do notallow you to maintain a constant speed, e.g.in heavy traffic or on winding roads
Ron slippery road surfaces. Braking or accel-erating could cause the drive wheels to losetraction and the vehicle could then skid
RIn poor visibility, e.g. due to fog, heavy rainor snow
Active Distance Assist DISTRONIC may notdetect narrow vehicles driving in front, e.g.motorcycles, or vehicles driving in a staggeredformation.
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
If Active Distance Assist DISTRONIC no longerdetects a vehicle in front, Distance PilotDISTRONIC may unexpectedly accelerate tothe speed stored.
This speed may:
RBe too high if you are driving in a turninglane or an exit lane
RBe so high when driving in the right-handlane that you overtake vehicles in the left-hand lane
RBe so high in the left lane that you passvehicles driving on the right
If there is a change of drivers, advise the newdriver of the speed stored.
Driving systems157
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Each time you start the engine with the Smart-Key or the Start/Stop button, the comfortablesetting is activated. For further informationabout starting the engine, see (Ypage 127).
Selecting sports tuning
The firmer setting of the suspension tuning insports mode ensures even better contact withthe road. Select this mode if you favor a firmersuspension setting.
XMake sure that the engine is running or thatit has been switched off by the ECO start/stop function.
XIf indicator lampDDis not lit:press but-tonC.Indicator lampDlights up. Sports suspen-sion tuning is selected.
TheAMG Suspension System SPORTAMG Suspension System SPORTmes-sage appears in the multifunction display.
Selecting comfort tuning
In comfort mode, the driving characteristics ofyour vehicle are more comfortable. Select thismode if you favor a more comfortable drivingstyle.
XMake sure that the engine is running or thatit has been switched off by the ECO start/stop function.
XIf indicator lampDDis lit:press buttonC.Indicator lampDgoes out. Comfortablesuspension tuning is selected.
TheAMG Suspension System COMFORTAMG Suspension System COMFORTmessage appears in the multifunction dis-play.
Activating the driving dynamics dis-
play in the COMAND display
Using the driving dynamics display in the mul-timedia system display, you can see the driveprogram you selected as well as additionalinformation on the vehicle's operating status.
XSwitch on COMAND. Further informationcan be found in the Digital Operator's Man-ual.
The following information on the vehicle'soperating status is displayed in the drivingdynamics display:
RDrive program selected (Ypage 133)
RAccelerator pedal position shown in %
RBrake pedal position shown in %
RSteering angle
RVehicle level display (Ypage 170)
RActivity of the ABC spring struts
RLevel settings animation
RG-FORCE cross to display longitudinal andlateral acceleration (only available inSport,Sport PlusandRACEdrive programs)
ROverrun mode animation
Parking Assist PARKTRONIC
Important safety notes
Parking Assist PARKTRONIC is an electronicparking aid with ultrasound. It monitors thearea around your vehicle using six sensors inthe front bumper and six sensors in the rearbumper. Parking Assist PARKTRONIC visuallyand audibly indicates the distance betweenyour vehicle and an object.
Parking Assist PARKTRONIC is only an aid. It isnot a replacement for your attention to yourimmediate surroundings. You are alwaysresponsible for safe maneuvering, parking and
172Driving systems
Driving an d parking

exiting a parking space. Make sure that thereare no persons, animals or objects in themaneuvering area when you are maneuveringor parking.
!When parking, pay particular attention toobjects above or below the sensors, such asflower pots or trailer drawbars.PARKTRONIC does not detect such objectswhen they are in the immediate vicinity ofthe vehicle. You could damage the vehicleor the objects.
The sensors may not detect snow and otherobjects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic carwash, the compressed-air brakes on a truckor a pneumatic drill could causePARKTRONIC to malfunction.
PARKTRONIC may not function correctly onuneven terrain.
Parking Assist PARKTRONIC is activated auto-matically when you:
Rswitch on the ignition
Rshift the transmission to position[,^or\\
Rrelease the electric parking brake
Parking Assist PARKTRONIC is deactivated atspeeds above 11 mph (18 km/h). It is reacti-vated at lower speeds.
Range of the sensors
General notes
Parking Assist PARKTRONIC does not take intoaccount obstacles located:
Rbelow the detection range, such as persons,animals or objects
Rabove the detection range, e.g. overhangingloads, tail sections or loading ramps oftrucks
CSensors in the front bumper, left-hand side(example)
The sensors must be free from dirt, ice orslush. They can otherwise not function cor-rectly. Clean the sensors regularly, taking carenot to scratch or damage them (Ypage 275).
Range
Front sensors
CenterApprox. 40 in (approx.100 cm)
CornersApprox. 24 in (approx.60 cm)
Driving systems173
Driving and parking
Z

Either no braking application, or a course-cor-recting brake application adapted to the driv-ing situation occurs if:
Rthere are vehicles or obstacles, e.g. crashbarriers, located on both sides of your vehi-cle.
Ra vehicle approaches you too closely at theside.
Ryou have adopted a sporty driving style withhigh cornering speeds.
Ryou clearly brake or accelerate.
Ra driving safety system intervenes, e.g.
ESP®or PRE-SAFE®Brake.
RESP®is switched off.
Ra loss of tire pressure or a defective tire isdetected.
Switching on Active Blind Spot Assist
XMake sure that Active Blind Spot Assist isactivated (Ypage 199).
XTurn the SmartKey to positionHin the igni-tion lock.Warning lampsCin the exterior mirrorslight up red for approximately 1.5 secondsand then turn yellow.
Active Lane Keeping Assist
General notes
Active Lane Keeping Assist monitors the areain front of your vehicle by means of multifunc-tion cameraCat the top of the windshield.Various areas to the front, rear and side ofyour vehicle are also monitored with the aid ofthe radar sensor system. Active Lane KeepingAssist detects lane markings on the road andcan warn you before you leave your lane unin-tentionally. If you do not react to the warning,a lane-correcting application of the brakes canbring the vehicle back into the original lane.
This function is available in a speed rangebetween 40 mph and 120 mph (60 km/h and200 km/h).
For Active Lane Keeping Assist to assist youwhen driving, the radar sensor system must beoperational.
Important safety notes
If you fail to adapt your driving style, ActiveLane Keeping Assist can neither reduce therisk of accident nor override the laws of phys-ics. Active Lane Keeping Assist cannot takeinto account road, weather or traffic condi-tions. Active Lane Keeping Assist is only anaid. You are responsible for the distance to thevehicle in front, for vehicle speed, for brakingin good time and for staying in your lane.
Active Lane Keeping Assist cannot continu-ously keep your vehicle in its lane.
GWARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
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