2019 MERCEDES-BENZ C CLASS sensor

ROnly increasethe engine speed gradually andacceleratethevehicletofull speed after1,000 miles (1,500 km).
This also applies whenthe engine or parts ofthedrivetrain havebeenreplaced.
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 effectbyapplyinggreaterforcetothe 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.
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Function oftheradar sensors
Some driving and driving safety systems useradar sensorstomonitorthe area in front of,behind or nexttothevehicle (depending onthevehicle's equipment).
Depending onthevehicle's equipment,theradarsensors are integrated behindthe bumpersand/or behindthe Mercedesstar.Keeptheseparts free of dirt, ice and slush(page 364). The sensors must not be cov‐ered,forexamplebycycleracks,overhangingloads,stickers,foil orfoilstoprotect againststonechipping. Intheevent of damagetothebumpers orradiator grill, orfollowing a collisionimpactingthe bumpers orradiator grill, havethefunction oftheradar sensorschecked at aquali‐fied specialistworkshop. The driver assistancesystem may no longerworkproperly.
Overview of driving systems and drivingsafety systems
Inthis section,you willfind information aboutthefollowing driving systems and driving safetysystems:
R360° Camera (page 206)
RABS (Anti-lockBrakingSystem)(page171)
RActive Distance AssistDISTRONIC(page183)
RAIRMATIC (page197)
RActive Brake Assist (page175)
RActive LaneKeeping Assist (page 222)
RATTENTION ASSIST (page215)
RBAS (BrakeAssistSystem) (page172)
RHillStart Assist (page195)
RDYNAMICBODYCONTROL (page196)
REBD (ElectronicBrakeforceDistribution)(page175)
RESP®(ElectronicStabilityProgram)(page172)
RActive Speed Limit Assist (page187)
RHOLD function (page195)
RSTEER CONTROL (page175)
RActiveSteering Assist (page189)
RActiveParking Assist (page 209)
RParking AssistPARKTRONIC(page 200)
RRear view camera (page 204)
RCruise control (page181)
RFunction of Blind Spot AssistandActive BlindSpot Assistwithexitwarning(page219)
RTraffic Sign Assist (page217)
Function of ABS (Anti-lock Braking System)
ABSregulatesthe brake pressure in critical driv‐ing situations:
RDuring braking, e.g. at full brake applicationor insufficient tire traction,the wheels areprevented from locking.
RVehiclesteerability while braking is ensured.
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RAssistancethrough power-assistedsteering ifit detects a swerving maneuver.
RActivationbyan abruptsteering movementduring a swerving maneuver.
RAssistance during swerving andstraighteningofthevehicle.
RReaction from a speed of approximately12mph (20 km/h) uptoa speed of approx‐imately 43mph (70 km/h).
You can preventthe assistance at any timebyactivelysteering.
\nWARNINGRisk of an accident despiteEvasiveSteering Assist
EvasiveSteering Assist cannotalways clearlyidentify objects and complex traffic situa‐tions.
In addition,thesteering support of EvasiveSteering Assist isgenerally not 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.
System limitationsFull system performance is notavailablefor afew seconds after switching onthe ignition orafter driving off.
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 are impaired duetointerfer‐ence fromotherradar sources, e.g.strongradarreflections in parkinggarages.
RIf a loss of tire pressure or a defective tirehas been detected and displayed.
RIn complex traffic situations whereobjectscannotalways be clearly identified.
RIf pedestrians orvehicles movequickly intothe sensor detectionrange.
RIf pedestrians are hiddenby other objects.
RIfthe typical outline of a pedestrian cannotbe distinguished fromthe background.
RIf a pedestrian is not detected as such, e.g.duetospecial clothing orother objects.
ROn bends with a tightradius.
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vehicles withthe Driving AssistancePackage, intherange between15mph (20 km/h) and130mph (210km/h).
Otherfeatures ofActive Distance AssistDISTRONIC:
RAdjuststhe drivingstyle depending ontheselected drive program (fuel-saving, comfort‐able or dynamic) (page153)
RVehicles with Driving AssistancePack‐age:reactstostationaryvehicles detected inurban speedranges (except bicycles andmotorcycles).
RInitiates accelerationtothestored speed ifthe turn signal indicator is switched ontochangetotheovertaking lane.
RVehicles with Driving AssistancePack‐age:takes one-sidedovertakingrestrictionsinto account on highways or on multi-laneroads with separateroadways (country-dependent).
Vehicles withActiveParking Assist and Driv‐ing AssistancePackage:ifthevehicle hasbeen brakedtoastandstill on multi-lane,struc‐
turallyseparateroadwaysbyActive 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 ingreatlyvaryingambient 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.
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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.
\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.
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If novehicle is detected inthe adjacent lane anda lanechange is permitted,the lanechangebegins. This is showntothe driver with a greenarrow2nexttothesteering wheel symbol.TheLane Change to the Leftmessage alsoappears,forexample. IfActive Lane ChangeAssisthas been activated withthe turn signalindicator but a lanechange is not immediatelypossible, a grayarrow1appears nexttothesteering wheel symbol, whichremains green.
Whenthe lanechange assistancestarts,the turnsignal indicator is automatically activated besidethe display inthe multifunction display.
Ifthe assistance graphic is shown whenchang‐ing lanes,the lanechange display appears with
an additional arrowpointingtowardsthe adja‐cent lane (page193).
If a lanechange is not possible,the arrow fadesout after afew seconds and a new lanechangemust 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 alwaysdetectclearly ifthe 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(page189).
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.
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Parking AssistPARKTRONIC
Function ofParking AssistPARKTRONIC
Parking AssistPARKTRONIC is an electronicparking assistance system with ultrasound. Itmonitorsthe area aroundyourvehicle using sixsensors1inthe front bumper and six sensorsintherear bumper.Parking AssistPARKTRONICshowsyouthe distance betweenyourvehicleand a detected obstacle visually and audibly.
Parking AssistPARKTRONIC is onlyan aid. It isnot a substituteforyour attentiontothe sur‐roundings. Theresponsibilityfor safe maneuver‐ing and parkingremains withyou. Make surethatthere are no persons, animals or objects in
the maneuvering area while maneuvering andparking in/exiting parking spaces.
Inthestandard setting, an intermittentwarningtone sounds from a distance of approximately1.0ft(0.3 m)toan obstacle in front and approx‐imately 3.3ft(1.0 m)toan obstacle behind. Acontinuoustone sounds from a distance ofapproximately 0.7ft(0.2 m). UsingtheWarnearlysetting inthe multimedia system,thewarningtonesfor front and side impact protec‐tion can also be settosound at a greater dis‐tance of approximately 3.3ft(1.0 m)(page 203).
TheWarnearlysetting is always active intherear ofthevehicle.
IfParking AssistPARKTRONIC is deactivated,ActiveParking Assist is unavailable.
Parking AssistPARKTRONIC displayinthemultimedia system
Vehicles withActiveParking Assist without a360° Camera
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Vehicles withActiveParking Assist and a 360°Camera
IfActiveParking Assist is deactivated and anobstacle is detected inthe path ofthevehicle, apop-up windowforParking AssistPARKTRONIC1appears inthe multimedia system at speedsbelow 6mph (10 km/h).
System limitations
Parking AssistPARKTRONIC does not necessa‐rilytakeinto accountthefollowing obstacles:
RObstacles below the detectionrange, e.g.persons, animals or objects.
RObstacles abovethe detectionrange, e.g.overhanging loads,overhangs or loadingramps of trucks.
The sensors must be free of dirt, ice and slush.Otherwise,theymay not function correctly.Cleanthe sensorsregularly,taking care nottoscratch or damagethem.
Function ofthe passive side impact protec‐tionPassive side impact protection is an additionalParking AssistPARKTRONIC function whichwarnsthe driver about obstacles atthe side ofthevehicle. Awarning is issued when obstaclesare detected betweenthe front andrear detec‐tionrange. In orderfor an object onthe sidetobe detected,the sensors inthe front andrearbumper mustfirst detectthe object whileyouare driving past it.
Duringthe parking procedure or maneuvering,objects are detected asthevehicle drives past.Ifyousteer inthe direction of a detected obsta‐cle andthere is arisk of a lateral collision, awarning is issued. The segments onthe sides
light upyellow orred, depending onthe distancetothe obstacle.
Segment color depending on distance
ColorLateral distance incm
YellowApprox. 30 - 60
RedApprox. < 30
In orderfor lateral front orrear segmentstobedisplayed,thevehicle mustfirst travel a distanceof at least half ofthevehicle length. Oncethevehicle has traveledthe length ofthevehicle, allofthe lateral front andrear segments can be dis‐played.
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