brake sensor MERCEDES-BENZ E CLASS 2019 Owners Manual

NOTEImpairment ofthe operating effi‐ciency oftherestraint systems frominstalling accessory parts or fromrepairsorwelding
Airbags and EmergencyTensioning Devices,aswell as control units and sensorsfortherestraint systems, may be installed inthefol‐lowing areas ofyourvehicle:
RDoors
RDoor pillars
RDoor sills
RSeats
RCockpit
RInstrument cluster
RCenter console
RLateralroof frame
Do not install accessory parts such asaudio systems inthese areas.
Do not carryoutrepairs orwelding.
Haveaftermarket installation of acces‐sories carried out at aqualified special‐istworkshop.
You could jeopardizethe operating safety ofyourvehicle ifyou use parts, tires and wheels aswellas accessoriesrelevanttosafety which havenotbeen approvedbyMercedes-Benz. Safety-rele‐vant systems, e.g.the brake system, may mal‐function. Only use Mercedes-Benz GenuinePartsor parts of equalquality.Only use tires, wheelsand accessoriesthat havebeen specificallyapprovedforyourvehicle model.
Mercedes-Benz GenuineParts are subjecttostrictquality control. Each part has been spe‐cially developed, manufactured or selectedforMercedes-Benzvehicles andfine-tunedforthem.Therefore, only Mercedes-Benz GenuinePartsshould be used.
Morethan 300,000 different Mercedes-BenzGenuineParts areavailablefor Mercedes-Benzmodels.
All authorized Mercedes-Benz Centers maintaina supply of Mercedes-Benz GenuinePartsfor
necessaryservice andrepairwork. In addition,strategically located parts delivery centers pro‐videforquick andreliable parts service.
Always specifythevehicle identification number(VIN) (→page417) when ordering Mercedes-Benz GenuineParts.
Operator's Manual
This Operator's Manual describes all models andallstandard and optional equipmentavailableforyourvehicle atthe time ofthis Operator's Man‐ual goingtopress. Country-specific differencesare possible. Notethatyourvehicle may not beequipped with allfeatures described. This is alsothe casefor systems and functionsrelevanttosafety.Therefore,the equipment onyourvehiclemay differ fromthat inthe descriptions and illus‐trations.
The original purchase agreementforyourvehiclecontains a list of all ofthe systems inyourvehi‐cle.
Shouldyou haveanyquestions concerningequipment and operation, please consult anauthorized Mercedes-Benz Center.
20General notes

technical information aboutthevehicle's operat‐ingstate, component loads, maintenancerequirements andtechnicalevents or malfunc‐tions.
Ingeneral,this information documentsthestateof a component part, a module, a system orthesurroundings such as:
Roperatingstatus of system components (e.g.fill levels, batterystatus, tire pressure)
Rstatus messages concerningthevehicle orits individual components (e.g. number ofwheelrevolutions/speed, longitudinal accel‐eration, lateral acceleration, display offas‐tened seat belts)
Rmalfunctions orfaults in important systemcomponents (e.g. lights, brakes)
Rinformation onevents leadingtovehicledamage
Rsystemreactions in special driving situations(e.g. airbag deployment, intervention ofsta‐bility control systems)
Rambient conditions (e.g.temperature,rainsensor)
In additiontoprovidingthe actual control unitfunction,this data assiststhe manufacturer indetecting andrectifying malfunctions and opti‐mizingvehicle functions. The majority ofthisdata istemporary and is only processed inthevehicle itself. Only a small portion ofthe data isstored intheevent or malfunction memory.
Whenyourvehicle is serviced,technical datafromthevehicle can beread outbyservice net‐workemployees (e.g.workshops, manufactur‐ers) orthird parties (e.g. breakdown services).Services includerepair services, maintenanceprocesses,warranty claims andquality assur‐ance measures,forexample. Theread out is per‐formed viathe legally prescribed portforthediagnostics connection inthevehicle. Therespective service network locations orthirdparties collect, process and usethe data. Theydocumenttechnicalstatuses ofthevehicle,assist infinding malfunctions and improvingquality and are transmittedtothe manufacturer,if necessary.Furthermore,the manufacturer issubjecttoproduct liability.Forthis,the manu‐facturerrequirestechnical datafromvehicles.
Fault memories inthevehicle can beresetby aservice outlet as part ofrepair or maintenancework.
Depending onthe selected equipment,you canimport data intothevehicle's comfort and info‐tainment functionsyourself.
This includes,forexample:
Rmultimedia data such as music,films or pho‐tosfor playbackin an integrated multimediasystem
Raddress book datafor use in connection withan integrated hands-free system or an inte‐grated navigation system
Rentered navigation destinations
Rdata aboutthe use of Internet services
This data can be saved locally inthevehicle or itis located on a device whichyou haveconnectedtothevehicle (e.g. smartphone, USBflash driveor MP3 player). Ifthis data isstored inthevehi‐cle,you can deleteit at any time. This data issenttothird parties only atyourrequest, partic‐ularlywhenyou use online services in accord‐ance withthe settingsthatyou haveselected.
General notes27

Please also observethefollowing breaking-innotes:
RIn certain driving and driving safety systems,the sensors adjust automatically while a cer‐tain distance is being driven afterthevehiclehas been delivered or afterrepairs.Full sys‐tem effectiveness is notreached untiltheend ofthisteach-in process.
RBrakepads, brake discs and tiresthat areeither new or havebeenreplaced only ach‐ieveoptimum braking effect and grip afterseveral hundred kilometers of driving. Com‐pensateforthereduced braking effectbyapplying greaterforcetothe brake pedal.
Notes on driving
\nWARNINGRisk of accident duetoobjects inthe driver'sfootwell
Objects inthe driver'sfootwell may impedepedal travel or block a depressed pedal.
This jeopardizesthe operating androadsafety ofthevehicle.
Stowall objects inthevehicle securelysothattheycannotgetintothe driver'sfootwell.
Always installthefloor mats securelyand as prescribed in ordertoensurethatthere is always sufficientroomforthe pedals.
Do not use loosefloor mats and do notplacefloor mats ontop of one another.
\nWARNINGRisk of accident duetounsuitablefootwear
Operation ofthe pedals may berestrictedduetounsuitablefootwear such as:
RShoes with platformsoles
RShoes with high heels
RSlippers
When driving alwayswear suitableshoes in ordertobe abletooperatethepedals safely.
\nWARNINGRisk of accident when switch‐ing offthe ignition when driving
Ifyou switchoffthe ignition while driving,safety functions arerestricted or no longeravailable. This may affectthe powersteeringsystem andthe brakeforce boosting,forexample.
You willthen needtouse considerably moreforcetosteer and brake.
Do not switch offthe ignition while driv‐ing.
\nDANGERRisk offatal injuries duetoexhaustgases
Combustion engines emit poisonousexhaustgases such as carbon monoxide. Inhalingtheseexhaustgases is hazardoustohealthand can leadtopoisoning.
Never leavethe enginerunning in anenclosed space without sufficientventi‐lation.
14 2Driving and parking

\nWARNINGRisk of an accident despiteEvasiveSteering Assist
EvasiveSteering Assist cannotalways clearlyidentify objects and complex traffic situa‐tions.
In addition,thesteering support of EvasiveSteering Assist isgenerallynot sufficienttoavoid a collision.
In such cases EvasiveSteering Assist can:
Rgive an unnecessarywarning or provideassistance
Rnot giveawarning or not provide assis‐tance
Always pay careful attentiontothe traf‐fic situation; do notrely on EvasiveSteering Assist alone.
Bereadytobrake andtakeevasiveaction if necessary.
Preventthe assistancebyactivelysteer‐ing in non-critical driving situations.
Drive at an appropriate speed if pedes‐trians are closetothe path ofyourvehi‐cle.
Also observethe system limitations of EvasiveSteering Assist.
System limitations
The system may be impaired or may not functioninthefollowing situations:
RIn snow,rain,fog, heavy spray, ifthere isglare, in direct sunlight or ingreatlyvaryingambient light.
RIfthe sensors are dirty,fogged up, damagedor covered.
RIfthe sensors malfunction dueto otherradarsource interference,forexamplestrongradarreflections in parkinggarages.
RIf a loss of tire pressure or a defective tirehas been detected and displayed.
The system may notreact correctly:
RIn complextraffic situations whereobjectscannotalways be clearly identified.
RTopedestrians orvehicles iftheymovequickly intothe sensor detectionrange.
RTopedestrians who are hiddenby otherobjects.
RIfthe typical outline of a pedestrian cannotbe distinguished fromthe background.
RIf a pedestrian is notrecognized as such, e.g.duetospecial clothing orother objects.
ROn bends with a tightradius.
SettingActive Brake Assist
Multimedia system:
VehiclekAssistance Active Brake
Assist
Vehicles without Driving AssistancePack‐age:The settings can be made afterstartingthevehicle.
Vehicles with Driving AssistancePackage:The settings can be made whenthe ignition isswitched on.
Thefollowing settings areavailable:
REarly
174Driving and parking

turally separateroadwaysbyActive DistanceAssistDISTRONIC, it can automaticallyfollowthevehicle in front driving off again within30 seconds. If a critical situation is detectedwhen driving off, a visual and acousticwarning isgiven indicatingthatthe driver must nowtakecontrol ofthevehicle. Thevehicle is not acceler‐ated any further.
Active Distance AssistDISTRONIC is only an aid.The driver isresponsibleforkeeping a safe dis‐tancetothevehicle in front,forvehicle speedandfor braking in good time.
System limitations
The system may be impaired or may not functioninthefollowing instances:
RIn snow,rain,fog, heavy spray, ifthere isglare, in direct sunlight or in greatlyvaryingambient light.
RThe windshield inthe area ofthe camera isdirty,fogged up, damaged or covered.
RIftheradar sensors are dirty or covered.
RIn parkinggarages or onroads withsteepuphill or downhill gradients.
RIfthere are narrowvehicles in front, such asbicycles or motorcycles.
In addition, on slipperyroads, braking or accel‐erating can cause one or several wheelstolosetraction andthevehicle couldthen skid.
Do not useActive Distance AssistDISTRONIC inthese situations.
\nWARNINGRisk of accident from acceler‐ation or brakingbyActive DistanceAssistDISTRONIC
Active Distance AssistDISTRONIC may accel‐erate or brake inthefollowing cases,forexample:
RIfthevehicle pullsawayusingActive Dis‐tance AssistDISTRONIC.
RIfthestored speed is called up and isconsiderablyfaster or slowerthanthecurrently driven speed.
RIfActive Distance AssistDISTRONIC nolonger detects avehicle in front or doesnotreacttorelevant objects.
Always carefully observethe traffic con‐ditions and bereadytobrake at alltimes.
Takeinto accountthe traffic situationbefore calling upthestored speed.
\nWARNINGRisk of accident duetoinsuf‐ficient decelerationbyActive DistanceAssistDISTRONIC
Active Distance AssistDISTRONIC brakesyourvehicle with upto50% ofthe maximumpossible deceleration. Ifthis deceleration isnot sufficient,Active Distance AssistDISTRONIC alertsyou with a visual andacousticwarning.
Inthese cases, adjustyour speed andkeep a sufficient distance.
Brakethevehicleyourself and/ortakeevasive action.
17 8Driving and parking

\nWARNINGRisk of accident if detectionfunction ofActive Distance AssistDISTRONIC is impaired
Active Distance AssistDISTRONIC does notreact or has a limitedreaction:
Rwhen driving on a different lane or whenchanging lanes
Rtopedestrians, animals, bicycles orsta‐tionaryvehicles, or unexpected obstacles
Rtocomplextraffic conditions
Rtooncomingvehicles and crossing traffic
As aresult,Active Distance AssistDISTRONIC may neither givewarnings norintervene in suchsituations.
Always observethe traffic conditionscarefully andreact accordingly.
OperatingActive Distance Assist DISTRONIC
Requirements:RThevehicle has beenstarted.
RThe electric parking brake isreleased.
RESP®is activated and is not intervening.
RThe transmission is in position[.
RAllthe doors are closed.
RCheck oftheradar sensor system has beensuccessfully completed (vehicle travelingfasterthan12mph (20 km/h)).
RParking AssistPARKTRONIC is not beingusedtoparkthevehicle ortoexit from aparking space.
RThevehicle does not skid.
Toactivate/deactivateActive DistanceAssist DISTRONIC:press button1.
ToactivateActive Distance AssistDISTRONIC:pressrocker switch3up (SET+) or down (SET-), or pressrocker switch4up.Removeyourfootfromthe acceleratorpedal.The current speed isstored and maintainedbythevehicle.
Driving and parking17 9

must be initiated. An immediate lanechange isonly possible on freeway sections without speedlimits.
Ifthe system is impaired,Active Lane ChangeAssistmay be canceled. If it is canceled,theLane Change Canceledmessage appears inthemultifunction display and awarningtone sounds.
\nWARNINGRisk of accident fromchang‐ing lanetoan occupied adjacent lane
Lane ChangeAssistcannot alwaysdetectclearlyifthe adjacent lane is free.
The lanechange might be initiated althoughthe adjacent lane is not free.
Beforechanging lanes, make surethatthe neighboring lane is free andthere isno dangerto otherroad users.
Monitorthe lanechange.
\nWARNINGRisk of accident if LaneChange Assistunexpectedlystops func‐tioning
Ifthe system limitationsfor Lane ChangeAssist havebeenreached,there is no guar‐anteethatthe system willremain active.
Lane Change Assist cannotthen assistyoubyapplyingsteeringtorques.
Always monitorthe lanechange andkeepyour hands onthesteering wheel.Observethe traffic conditions andsteerand/or brake if necessary.
System limitationsThe system limitations ofActiveSteering AssistapplytoActive Lane Change Assist(→page183).
The system may also be impaired or may notfunction inthefollowing situations:
RThe sensors intherear bumper are dirty,damaged or covered,for instanceby asticker or ice and snow.
RTheexterior lighting is malfunctioning.
Activating/deactivatingActive Lane ChangeAssistMultimedia system:
VehiclekAssistance
SelectLane Change Assist.
Activatesor deactivateSthe function.
Function ofActive EmergencyStop AssistIfthe driver continually ignoresthe visual oracousticwarningtoputtheir hands onthesteer‐ing wheel,theBeginning Emergency Stopmes‐sage appears inthe multifunction display.Ifthedriverstill does notrespond,Active DistanceAssistDISTRONICreducesthe speed. Thevehi‐cle is decelerated instagestoastandstill.Atspeeds below 40mph (60 km/h)the hazardwarning lights switch on automatically.
Whenthevehicle isstationary,thefollowingactions are carried out:
RThevehicle is secured withthe electric park‐ing brake
RActive Distance AssistDISTRONIC is ended
RThevehicle is unlocked
18 6Driving and parking

Be preparedtobrake or swerveas nec‐essary,providedthe traffic situationpermits andthat it is safetotakeeva‐sive action.
DriveAwayAssistis only an aid. It is not a sub‐stituteforyour attentiontothe surroundings.Theresponsibilityfor safe maneuvering andparkingremains withyou. Make surethat nopersons, animals or objectsetc. are inthemaneuveringrange.
Arisk of a collision may arise inthefollowing sit‐uations,forexample:
RIfthe driver mixes upthe accelerator andbrake pedals.
RIfthe wronggear is selected.
The DriveAwayAssistfunction is active underthefollowing conditions:
RIfParking AssistPARKTRONIC is activated.
REvery timethegear ischangedto^or[whenthevehicle is at astandstill.
RIfthe detected obstacle is lessthan approx.3.3ft(1.0 m)away.
RIfthe maneuvering assistance function isactivated inthe multimedia system.
System limitationsDriveAwayAssistis notavailable on inclines.
Function of CrossTraffic Alert
Alsoreadthe instructions on Blind SpotAssist (→page212).
Vehicles with Blind Spot Assist:drivers canalso bewarned of any crossing traffic whenbacking up out of a parking space. If a criticalsituation is detected, symbol1appearsinthemultimedia system display.Ifthe driver does notrespondtothewarning,thevehicle's brakes canbe applied automatically.Todothis,the functionusestheradar sensors inthe bumper. The areaadjacenttothevehicle is continually monitored.
Iftheradar sensors are obstructedbyvehiclesorother objects, detection is not possible.
The CrossTraffic Alert function is activeunderthefollowing conditions:
RIf Blind Spot Assist is activated.
RIfthevehicle is backing up atwalking pace.
RIfthe maneuvering assistance function isactivated inthe multimedia system.
System limitationsThe CrossTraffic Alert function is notavailableon inclines.
208Driving and parking

Warnings may be interrupted when driving along‐side longvehicles,forexample trucks,for a pro‐longed time.
Blind Spot Assist is not operational whenreversegear is engaged.
Theexitwarning may be limited inthefollowingsituations:
RWhenthe sensors are coveredbyadjacentvehicles in narrowparking spaces.
RWhen people approachthevehicle.
RIntheevent ofstationary or slowly movingobjects.
Function of brake application (Active BlindSpot Assist)The brake application function is onlyavailableforvehicles with a Driving AssistancePackage.
IfActive Blind Spot Assistdetects arisk of a sideimpact inthe monitoringrange, a course-cor‐recting brake application is carried out. This isdesignedtohelpyouavoid a collision.
The course-correcting brake application isavaila‐ble inthe speedrange between approximately20mph (30 km/h) and125mph (200 km/h).
\nWARNINGRisk of accident despitebrake application ofActive Blind SpotAssist
A course-correcting brake application cannotalways prevent a collision.
Alwayssteer, brake or accelerateyour‐self, especially ifActive Blind SpotAssistwarnsyou or makes a course-correcting brake application.
Always maintain a safe distance atthesides.
\nWARNINGRisk of accident despiteActive Blind Spot Assist
Active Blind Spot Assistdoes notreacttothefollowing:
RIfvehiclesovertaketoo closely ontheside, placingthem inthe blind spot area
RVehicles approaching andovertakingyouat agreatly different speed
As aresult,Active Blind Spot Assistmay nei‐ther givewarnings nor intervene in suchsit‐uations.
Always pay careful attentiontothe traf‐fic situation and maintain a safe dis‐tance atthe side ofthevehicle.
If a course-correcting brake application occurs,theredwarning lampflashes inthe outside mir‐ror and awarningtone sounds. In addition, dis‐play1indicatingthe danger of a side collisionappears inthe multifunction display.
Inrarecases,the system may make an inappro‐priate brake application. This brake application
214Driving and parking

RYou haveadopted a sporty drivingstyle withhigh cornering speeds or highrates of accel‐eration.
RWhen ESP®is deactivated.
RIf a loss of tire pressure or afaulty tire hasbeen detected and displayed.
The system may be impaired or may not functioninthefollowing situations:
RIfthere is poor visibility, e.g. duetoinsuffi‐cient illumination oftheroad, ifthere arehighlyvariable shade conditions or inrain,snow,fog or heavy spray.
RIfthere isglare, e.g. from oncoming traffic,the sun orreflections.
RIfthe windshield inthe area ofthe multifunc‐tion camera is dirty, or ifthe camera isfog‐ged up, damaged or covered.
RIfthere are no lane markings, or severalunclear lane markings are presentfor onelane, e.g. aroundroadworks.
RIfthe lane markings areworn, dark or cov‐ered.
RIfthe distancetothevehicle in front istooshort andthusthe lane markings cannotbedetected.
RIfthe lane markingschangequickly,e.g.lanes branch off, cross one another ormerge.
RIftheroadwayisverynarrow and winding.
Vehicles with Driving Assistance packageorDriving Assistance Plus package:Active LaneKeeping Assist usesradar sensorstomonitorseveral areas aroundthevehicle. Iftheradarsensors intherear bumper are dirty or coveredwith snow,the system may be impaired or maynot function. If an obstacle inthe lane in whichyou are driving has been detected, no lane-cor‐recting brake application occurs.
Activating/deactivatingActive LaneKeepingAssist (vehicles withParking AssistPARKTRONIC)
\nWARNINGRisk of accident despiteActive LaneKeeping Assistwarning
A lane-correcting brake application cannotalwaysbringthevehicle back intothe origi‐nal lane.
Alwayssteer, brake or accelerateyour‐self, especially ifActive LaneKeepingAssistwarnsyou or makes a lane-cor‐recting brake application.
\nWARNINGRisk of accident despiteinter‐vention ofActive LaneKeeping Assist
Active LaneKeeping Assist does not detecttraffic conditions orroad users. Inveryrarecases,the system may make an inappropri‐ate brake application, e.g. after intentionallydrivingover a solid lane marking.
The brake application can be interrupted atany time ifyousteer slightly inthe oppositedirection.
Driving and parking217