2019 MERCEDES-BENZ C CLASS Owners Manual

RIfthe maneuvering assistance function isactivated inthe multimedia system.
System limitationsDriveAwayAssistis notavailable on inclines.
Function of CrossTraffic Alert
Alsoreadthe instructions on Blind SpotAssist (page219).
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.
Deactivating/activating maneuvering assis‐tanceMultimedia system:
VehiclekAssistanceCamera & ParkingManeuvering Assist.
Activatesor deactivateSthe function.
Maneuvering assistance mustbe activeforthe function of DriveAwayAssist(page214) and CrossTraffic Alert(page215).
ATTENTION ASSIST
Function ofATTENTION ASSISTATTENTION ASSIST assistsyou on long, monoto‐nous journeys, e.g. on highways and trunkroads.IfATTENTION ASSIST detects indicators offati‐gue or increasing lapses in concentration onthepart ofthe driver, it suggeststaking a break.
ATTENTION ASSIST is only an aid. It cannotalways detectfatigue or lapses in concentrationin time. The system is not a substitutefor awell-rested and attentive driver. On long journeys,
Driving and parking215

takeregular breaks in good timethat allowforadequaterecuperation.
You canchoose between two settings.
RStandard:normal system sensitivity.
RSensitive:higher system sensitivity. Thedriver iswarned earlier andthe attentionlevel detectedbyATTENTION ASSIST is adap‐ted accordingly.
If drowsiness or increasing lapses in concentra‐tion are detected,theATTENTION ASSIST: Takea Break!warning appears inthe instrument dis‐play.You can acknowledgethe message andtake a break where necessary.Ifyou do nottakea break andATTENTION ASSIST continuestodetect increasing lapses in concentration,youwill bewarned again after a minimum of15minutes.
You can havethefollowingstatus informationforATTENTION ASSIST displayed inthe assistancemenu ofthe on-board computer:
RThe length ofthe journey sincethe lastbreak.
RThe attention level determinedbyATTENTIONASSIST.
IfATTENTION ASSIST is unabletocalculatetheattention level and cannot issue awarning,theSystem Suspendedmessageappears.
If awarning is given inthe instrument display,the multimedia system offerstosearchfor arestarea.You can select arestarea andstart naviga‐
tiontothisrestarea. This function can be activa‐ted and deactivated inthe multimedia system.
IfATTENTION ASSIST is deactivated,the

RIfthe time has been set incorrectly.
RIn activedriving situations, ifyouchangelanes andvaryyour speed frequently.
TheATTENTION ASSIST tiredness or alertnessassessment is deleted andrestarted when con‐tinuingthe journey inthefollowing situations:
RIfyou switchoffthe engine.
RIfyou unfastenyour seat belt and openthedriver's door (e.g.changing drivers ortakinga break).
SettingATTENTION ASSISTMultimedia system:
VehiclekAssistanceATTENTION ASSIST
Setting options
SelectStandard,SensitiveorOff.
Suggesting arestarea
SelectSuggest Rest Area.
Activatesor deactivatethe functionS.IfATTENTION ASSIST detectsfatigue orincreasing lackof attention, it suggests arestarea inthe vicinity.
Select a suggestedrestarea:you are gui‐dedtothe selectedrestarea.
Traffic Sign Assist
Function ofTraffic Sign Assist
Traffic Sign Assistdetects traffic signs withmul‐tifunction camera1. It assistsyoubydisplay‐ing detected speed limits andovertakingrestric‐
tions inthe instrument cluster and optionally inthe Head-up Display.
SinceTraffic Sign Assistalso usesthe datastored inthe navigation system, it can updatethe display inthefollowing situations withoutdetecting traffic signs:
RWhenthevehiclechangesroads, e.g. a free‐way entry orexitroad.
RWhen a village or city boundary which isstored inthe digital map is passed.
The camera also detects traffic signs with arestriction indicatedbyan additional sign (e.g. inwet conditions).
Traffic Sign Assistis only an aid. The driver isresponsibleforkeeping a safe distancetothevehicle in front,forvehicle speed andfor brakingin good time. The maximum permissible speedalso depends onfactors suchastheroad sur‐face and traffic conditions.
Warning whenthe maximum permissiblespeed isexceededThe system canwarnyou ifyou unintentionallyexceedthe maximum permissible speed.Todo
Driving and parking217

this,you can specify inthe multimedia systembyhow muchthe maximum permissible speedcan beexceeded before awarning is issued.Yo ucan specify whetherthewarning istobe just avisualwarning or an acoustic one aswell.
Display inthe Instrument Display
Instrument Display intheWidescreen Cockpit
1Permissible speed
2Permissible speed whenthere is arestriction
3Additional sign withrestriction
Traffic Sign Assistis notavailable in all coun‐tries. If it is unavailable, display1is shown inthe speedometer.
System limitations
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,direct sunlight orreflections.
RIfthe windshield inthe area ofthe multifunc‐tion camera is dirty, or ifthe camera isfog‐ged up, damaged or covered.
RIfthe traffic signs are hardtodetect, e.g. duetodirt or snow,or becausetheyare coveredor duetoinsufficient lighting.
RIfthe information inthe navigation system'sdigital map is incorrect or out-of-date.
RIfthe signs are ambiguous, e.g. traffic signson construction sites or in adjacent lanes.
RIfyou turn sharply when traffic signs are out‐sidethe camera'sfield of vision.
SettingTraffic Sign AssistMultimedia system:
VehiclekAssistanceTraffic Sign Assist
Activating/deactivating automatic adoptionof speed limits
Requirements:
RActive Distance AssistDISTRONIC is activa‐ted.
218Driving and parking

SelectLimit Adoption.
Activatesor deactivateSthe function.The speed limits detectedbyTraffic SignAssistare automatically adoptedbyActiveDistance AssistDISTRONIC.
Displaying detected traffic signs in themedia display
SelectDisplay in COMAND.
Activatesor deactivateSthe function.
When DISTRONIC or cruise control are acti‐vated,the speed detected can be manuallyadopted asthe speed limit(page185).
Adjusting the type ofwarning
SelectVisual & Audible,VisualorNone.
Adjusting thewarningthresholdThisvalue determinesthe speed at which awarning is issued whenexceeded.
SelectWarning Threshold.
Setthe desired speed.
Blind Spot Assist andActive Blind SpotAssistwithexitwarning
Function of Blind Spot Assist andActiveBlind Spot AssistwithexitwarningBlind Spot Assist andActive Blind Spot Assistuse two lateral,rear-facingradar sensorstomonitorthe area upto130ft(40 m) behindyourvehicle and10ft(3 m) directly nexttoyourvehi‐cle.
If avehicle is detected at speeds above approx‐imately 8mph (12 km/h) andthisvehicle subse‐quentlyentersthe monitoringrange directly nextto yourvehicle,thewarning lamp inthe outsidemirror lights upred.
If avehicle is detected closetothe side ofyourvehicle,theredwarning lamp inthe outside mir‐rorflashes. Ifyou switchonthe turn signal indi‐cator inthe corresponding direction, awarningtone sounds once. Ifthe turn signal indicatorremains switched on, allother detectedvehiclesare indicated onlybytheflashing oftheredwarning lamp.
Ifyouovertake avehiclequickly,nowarning isgiven.
\nWARNINGRisk of accident despiteBlindSpot Assist
Blind Spot Assistdoes notreacttovehiclesapproaching andovertakingyou at agreatlydifferent speed.
As aresult, Blind Spot Assist cannotwarndrivers inthis situation.
Always pay careful attentiontothe traf‐fic situation and maintain a safe dis‐tance atthe side ofthevehicle.
Blind Spot Assist andActive Blind Spot Assistare onlyaids. They mayfailtodetect somevehi‐cles and are no substitutefor attentive driving.Always ensurethatthere is sufficient distancetothe sideforotherroad users and obstacles.
ExitwarningTheexitwarning is an additional function ofBlind Spot Assist and canwarnvehicle occu‐pants about approachingvehicles when leavingthevehicle whenstationary.
Driving and parking219

\nWARNINGRisk of accident despiteexitwarning
Theexitwarningreacts neithertostationaryobjects nortovehicles approachingyou at agreatlydifferent speed.
As aresult,theexitwarning cannotwarndrivers inthese situations.
Always pay particular attentiontothetraffic situation when openingthe doorsand make surethere is sufficient clear‐ance.
Ifthere is avehicle inthe monitoringrange,thisis indicated inthe outside mirror.If avehicleoccupant opensthe door onthe side withthewarning, awarningtone sounds andthewarninglamp inthe outside mirrorstartstoflash.
This additional function is onlyavailable whenBlind Spot Assist is activated and uptoa maxi‐mum ofthree minutes afterthe ignition hasbeen switched off. Theexitwarning is no longeravailable oncethewarning lamp inthe outsidemirrorflashesthree times.
Theexitwarning is only an aid and not a substi‐tuteforthe attention ofvehicle occupants. Theresponsibilityfor opening and closingthe doorsandfor leavingthevehicleremains withthevehi‐cle occupants.
System limitations
Blind Spot Assist andActive Blind Spot Assistmay be limited inthefollowing situations:
Rifthere is dirt onthe sensors orthe sensorsare obscured
Rin poor visibility, e.g. duetofog, heavyrain orsnow
Rifthere are narrowvehicles, e.g. bicycles ormotorbikes
Riftheroad hasverywide or narrowlanes
Rifvehicles are not driving inthe middle oftheir lane
Warnings may be issued in error when drivingclosetocrash barriers or similar solid lane bor‐ders. Always make surethatthere is sufficientdistancetothe sideforother traffic or obsta‐cles.
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 narrow parking 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).
220Driving and parking

\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
may be interrupted at any time ifyousteerslightly inthe opposite direction or accelerate.
System limitations
Either a course-correcting brake applicationappropriatetothe driving situation, or none atall, may occur inthefollowing situations:
RVehicles or obstacles, e.g. crash barriers, arelocated on bothsides ofyourvehicle.
RAvehicle approachestoo closely onthe side.
RYou haveadopted a sporty drivingstyle withhigh cornering speeds.
RYou brake or accelerate significantly.
RA driving safety system intervenes, e.g. ESP®
orActive Brake Assist.
RESP®is deactivated.
RA loss of tire pressure or a defective tire isdetected.
Driving and parking221

Activating/deactivating Blind Spot AssistorActive Blind Spot AssistMultimedia system:
VehiclekAssistanceBlind Spot Assist
Activatesor deactivateSthe function.
Active LaneKeeping Assist
Function ofActive LaneKeeping Assist
Active LaneKeeping Assist monitorsthe area infront ofyourvehiclebymeans of multifunctioncamera1. It servestoprotectyou against unin‐tentionallyleavingyour lane.You will bewarned
byvibration pulses inthesteering wheel and gui‐dedbya course-correcting brake applicationbackintoyour lane.
You arewarnedbyvibration pulses inthesteer‐ing wheel inthefollowing circumstances:
RActive LaneKeeping Assist detects a lanemarking.
RA front wheel drivesoverthis lane marking.
You will also be guided back intoyour lanebymeans of a course-correcting brake applicationifthefollowing conditions are met:
RActive LaneKeeping Assist detects lanemarkings on bothedges ofthe lane.
RA front wheel drivesover a solid lane mark‐ing.
You can activate or deactivatetheActive LaneKeeping Assistwarning.
Active LaneKeeping Assist can neitherreducetherisk of an accident ifyoufailtoadaptyourdrivingstyle noroverridethe lawsof physics. Itcannottakeinto accountroad,weather or trafficconditions.Active LaneKeeping Assist is only anaid.You areresponsibleforthe distancetothe
vehicle in front,forvehicle speed,for braking ingood time andforstaying inyour lane.
Active LaneKeeping Assist can bringthevehicleback intothe lane with a lane-correcting brakeapplication. Inthe case of a broken lane markingbeing detected, a brake application will only bemade if avehicle has been detected inthe adja‐cent lane. Oncoming traffic can be detected.
Vehicles with Driving Assistance packageorDriving Assistance Plus package:overtakingvehicles andvehicles in adjacent lanes can alsobe detected.
Active LaneKeeping Assist isavailable inthespeedrange between37mph (60 km/h) and124mph (200 km/h).
222Driving and parking