2019 MERCEDES-BENZ C CLASS light

pedestrians, orreducethe effects of sucha colli‐sion.
IfActive Brake Assisthas detected arisk of colli‐sion, awarningtone sounds andtheLdis‐tancewarning lamp lights up inthe instrumentcluster.
Ifyou do notreacttothewarning, autonomousbraking can be initiated in critical situations.
In especially critical situations,Active BrakeAssistcan initiateautonomous braking directly.Inthis case,thewarning lamp andwarningtoneoccur simultaneously with the braking applica‐tion.
Ifyou applythe brakeyourself in a critical situa‐tion or applythe brake during autonomous brak‐ing, situation-dependent braking assistanceoccurs. The brake pressure increases uptomax‐imum full-stop braking if necessary.
If autonomous braking or situation-dependentbraking assistance has occurred, display1appears inthe multifunction display andthenautomatically goes out after a short time.
Ifthe autonomous braking function orthe situa‐tion-dependent braking assistance is triggered,additional preventive measuresfor occupant
protection (PRE-SAFE®) may also be initiated.
\nWARNINGRisk of an accident causedbylimited detection performance ofActiveBrake Assist
Active Brake Assistcannot alwaysclearlyidentify objects and complex traffic situa‐tions.
In suchcases,Active Brake Assistmight:
RGive awarning or brake withoutreason
RNotgive awarning or not brake
Always pay careful attentiontothe traf‐fic situation; do notrely onActive BrakeAssistalone.Active Brake Assistis onlyan aid. The driver isresponsibleformaintaining a suitable distancetothevehicle in front,vehicle speed andforbraking in good time.
Be preparedtobrake or swerveif nec‐essary.
Also observethe system limitations ofActiveBrake Assist.
176Driving and parking

The individual subfunctions areavailable inthefollowing speedranges:Distancewarning function
The distancewarning function issues awarninginthefollowing situations:
RFrom approximately 4mph (7 km/h), ifyourvehicle is critically closetoavehicle or
pedestrian,you will hear an intermittentwarningtone andtheLdistancewarninglamp lights up inthe instrument cluster.
Brake immediately ortakeevasive action, provi‐ded it is safetodo so andthe traffic situationallowsthis.
The distancewarning function can aidyou inthefollowing situations with an intermittentwarningtone and awarning lamp:
Vehiclestraveling infront
StationaryvehiclesCrossingvehiclesMovingpedestriansStationarypedestriansCrossingcyclistsCyclists travel‐ing in frontStationarycyclists
Vehicleswithout Driv‐ing Assis‐tance pack‐age
Uptoapprox.155mph(250 km/h)
Uptoapprox.50mph(80 km/h)
NoreactionUptoapprox.50mph(80 km/h)
NoreactionUptoapprox.37mph(60 km/h)
Uptoapprox.50mph(80 km/h)
Noreaction
Vehicles withDriving Assis‐tance pack‐age
Uptoapprox.155mph(250 km/h)
Uptoapprox.62mph(100 km/h)
Uptoapprox.43mph(70 km/h)
Uptoapprox.50mph(80 km/h)
Uptoapprox.43mph(70 km/h)
Uptoapprox.43mph(70 km/h)
Uptoapprox.50mph(80 km/h)
Uptoapprox.43mph(70 km/h)
Driving and parking17 7

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.
18 0Driving and parking

1Cruise control is selected
2Speed is saved, cruise control is deactivated
3Speed is saved, cruise control is activated
The segments betweenthestored speed andthe end ofthe segment display light up inthe speedometer.
System limitationsCruise control may be unabletomaintainthestored speed on uphill gradients. Thestoredspeed isresumed whenthe gradientevens out.
Change into a lowergear in good time on longandsteep downhill gradients.Takeparticularnoteofthis when driving a ladenvehicle. By
doing so,you will make use ofthe engine's brak‐ing effect. Thisrelievesthe load onthe brakesystem and preventsthe brakes fromoverheat‐ing andwearingtooquickly.
Do not use cruise control inthefollowing situa‐tions:
RIn traffic situations whichrequire frequentchanges of speed, e.g. in heavy traffic, onwindingroads.
ROn slipperyroads.Accelerating can causethe drive wheelstolose traction andthevehicle couldthen skid.
RIfyou are driving when visibility is poor.
Operating cruise control
\nWARNINGRisk of accident duetostoredspeed
Ifyou call upthestored speed andthis islowerthanyour current speed,thevehicledecelerates.
Takeinto accountthe traffic situationbefore calling upthestored speed.
Requirements:RESP®must be activated, but not intervening.
RThe driven speed is at least15mph(20 km/h).
RThe transmission is in position[.
Toactivate cruise control:pressrockerswitch1up.
18 2Driving and parking

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.
184Driving and parking

properlydetectedbythe system. The maximumpermissible speed applyingfor avehicle with atrailer is not detectedbythe system. Inthese sit‐uationsyou must adjustyour speedyourself.
\nWARNINGRisk of accident duetoActiveSpeed Limit Assistadaptingthevehicle'sspeed
The speed adoptedbyActive Speed LimitAssistmay betoo high or incorrect in someindividual cases, suchas:
RInthewet or infog
RWhentowing a trailer
Ensurethatthe driven speed complieswith trafficregulations.
Adjustthe driving speedtosuit currenttraffic andweather conditions.
Function ofroute-based speed adaptation
Thefollowing function is country-dependentand onlyavailable in conjunction withtheDriving AssistancePackage.
When Distance AssistDISTRONIC is active,thefunction adjuststhe speed depending ontherouteevents ahead. Depending onthe drive pro‐gram selected,thevehicle negotiatestherouteevent ahead in a fuel-saving, comfortable ordynamic manner. Whentherouteevent has beenpassed,thevehicle accelerates againtothestored speed. The set distancetothevehicle infront,vehicles detected ahead and speedrestric‐tions ahead aretaken into account.
Route-based speed adjustment canbyconfig‐ured inthe multimedia system(page189).
Routeevents ahead are:
RBends
RT-intersections, traffic circles andtollsta‐tions
RTurns andexits
RTraffic jams ahead (only withLiveTraffic(page 293))
Whenthetollstation isreached,Active Dis‐tance AssistDISTRONIC adoptsthe speed asthestored speed.
Also,the speed isreduced ifthe turn signaltochange lanes is switched on and one ofthefol‐lowing situations is detected:
RTurning off at intersections
RDriving on slowing-down lanes
RDriving on lanes adjacenttoslowing-downlanes
The driver isresponsibleforchoosingtherightspeed and observingotherroad users. Thisapplies in particulartointersections, traffic cir‐cles and traffic lights, asroute-based speedadaptation does not brakethevehicletoastand‐still.
Whenroute guidance is active,thefirst speedadjustment is carried out automatically. Iftheturn signal indicator is switched on,the selectedroute is confirmed and further speed adjustmentis activated.
Speed adjustment is canceled inthefollowingcases:
RIfthe turn signal indicator is switched offbeforetherouteevent.
18 8Driving and parking

Steering andtouch detectionThe driver isrequiredtokeeptheir hands onthesteering wheel at all times and be abletointer‐vene at any timetocorrectthe course ofthevehicle andkeep it in lane. The driver mustexpect achange from activetopassive mode orviceversa at any time.
Ifthe systemreaches a system limitation orthedriver has notsteeredthevehiclefor a consider‐able period of time or hasremovedtheir handsfromthesteering wheel,the system will,depending onthe situation, alertthe drivereither with a visualwarning or a visual andacousticwarning. Display1appears inthe mul‐tifunction display.
Ifthe driver does notsteerthevehicleover along period, or has nottaken hold ofthesteeringwheel, arepeatedwarningtone sounds in addi‐tiontothe visualwarning message (dependingonthe country).
Thewarning message does not appear or disap‐pears if one ofthefollowing conditions are met:
RThe driversteersthevehicle.
RThe driver presses asteering wheel button oroperatesTouch Control.
ActiveSteering Assist is only an aid. The driver isresponsibleforthe distancetothevehicle infront,forvehicle speed,for braking in good timeandforstaying in lane. Beforechanging lanes,the driver must make surethatthe neighboringlane is free (glanceoverthe shoulder).
System limitationsActiveSteering Assist has a limitedsteeringtor‐quefor lateral guidance. In some cases,thesteering intervention is not sufficienttokeepthevehicle inthe lane ortodrive pastexits.
The system may be impaired or may not functioninthefollowing instances:
RIn snow,rain,fog, heavy spray, ifthere isglare, direct sunlight,greatlyvarying ambientlight,reflections orstrong shadowsontheroadway.
RInsufficientroad illumination.
RThe windshield inthe area ofthe camera isdirty,fogged up, damaged or covered.
RAbsence of lane markings, or several unclearlane markings, or ifthe markingschangerap‐idly.
RThe distancetothevehicle in front istoosmall andthe lane markingsthus cannot bedetected.
RTheroad is narrow and winding.
RObstacles onthe lane or projecting out intothe lane.
The system does not provide assistance inthefollowing conditions:
ROn tight bends, intersections,tollstations,traffic circles and when turning.
19 0Driving and parking

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.
19 2Driving and parking