2019 MERCEDES-BENZ C CLASS Owners Manual

RWhen activelychanging lane without switch‐ing onthe turn signal.
RWhenthe tire pressure istoo low.
\nWARNINGRisk of accident ifActiveSteering Assist unexpectedlystops func‐tioning
Ifthe system limitations ofActiveSteeringAssist arereachedthere is no guaranteethatthe system willremain active or willkeepthevehicle in lane.
Alwayskeepyour hands onthesteeringwheel and observethe traffic carefully.
Alwayssteerthevehicle paying atten‐tiontotraffic conditions.
\nWARNINGRisk of accident ifActiveSteering Assist unexpectedly intervenes
A malfunction inthe detection of lane mark‐ings and objects can occur.
This could cause unexpectedsteering inter‐vention.
Steer accordingtotraffic conditions.
ActivatingActiveSteering Assist
RequirementsRESP®must be activated, but not intervening.
RActive Distance AssistDISTRONIC is activa‐ted.
If indicator lamp1is off: press button2.
Function ofActive Lane Change Assist
Thefollowing function is country-dependentand onlyavailable in conjunction withtheDriving AssistancePackage.
Active Lane Change Assistsupportsthe driverwhenchanging lanesbyapplyingsteeringtorqueifthe driver operates a turn signal.
Assistance whenchanging lanes is provided if allthefollowing conditions are met:
RYou are driving on a freeway orroad withmultiple lanes inthe direction of travel.
RThe neighboring lane is separatedbya bro‐ken lane marking.
RNovehicle is detected inthe adjacent lane.
RThe driven speed is between 50mph(80 km/h) and110mph (180 km/h).
RActive Lane Change Assistis switched on inthe multimedia system.
RActiveSteering Assist is switched on andactive.
Driving and parking191

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

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
RIf possible, an emergency call is placedtothe Mercedes-Benz emergency call center
The driver can cancelthe deceleration at anytimebyperforming one ofthefollowing actions:
RSteering
RBraking or accelerating
RPressing asteering wheel button
ROperatingTouch Control
RActivating or deactivatingActive DistanceAssistDISTRONIC
OverviewofActive Distance AssistDISTRONIC displaysinthe instrument clus‐ter
The assistance graphic andthestatus displayshowthestatus ofthefollowing functions intheinstrument cluster:
RActive Distance AssistDISTRONIC
RRoute-based speed adaptation
RActiveSteering Assist
Assistant display
1Route-based speed adaptation (type ofrouteevent)
2Vehicle in front
3Distance indicator
4Set specified distance
5Active Lane Change Assistlanechange dis‐play
Driving and parking19 3

Active Distance Assist DISTRONICstatus dis‐play androute-based speed adaptation
1Active Distance AssistDISTRONIC selected,set specified distance (number of segmentsbelowthevehicle)
2Active Distance AssistDISTRONIC deactiva‐ted, speedstored
3Active Distance AssistDISTRONIC active,speedstored, novehicle detected (brightvehicle symbol)
4Active Distance AssistDISTRONIC active,speedstored,vehicle detected (greenvehi‐cle symbol)
5Active Distance AssistDISTRONIC androute-based speed adaptation active, speedstored
On highways or high-speed majorroads,thegreençvehicle symbol is displayed cycli‐cally whenthevehicle isreadytopullaway.
SpeedometerThestored speed is highlighted onthe speedom‐eter. Ifthe speed ofthevehicle in front orthespeed adjustment is lessthanthestored speedduetotherouteevent ahead,the segments inthe speedometer light up.Activation or deactiva‐tion ofActive Distance AssistDISTRONIC, aswell as alterationstothe speed duetomanual orautomatic adoption ofthe speed limit, are dis‐played inthe controlfeedback ofthe multifunc‐tion display on a single line.
ActiveSteering Assiststatus display
1Graysteering wheel:ActiveSteering Assistswitched on and passive
2Greensteering wheel:ActiveSteering Assistswitched on and active
3Flashingsteering wheel: prompttothe drivertoactively confirmor transition from activetopassivestatus, system limitation detected
194Driving and parking

Function of HillStart Assist
HillStart Assist holdsthevehiclefor a shorttime when pullingawayon a hill underthefol‐lowing conditions:
RVehicles with automatic transmission:The transmission is in position[or^.
RThe electric parking brake isreleased.
This givesyou enough timetomoveyourfootfromthe brake pedaltothe accelerator pedaland depress it beforethevehicle beginstorollaway.
\nWARNINGRisk of accident and injuryduetothevehiclerollingaway
After a short time, HillStart Assist no longerholdsthevehicle and it canrollaway.
Therefore, swiftly moveyourfootfromthe brake pedaltothe acceleratorpedal. Never attempttoleavethevehi‐cle if it is being heldbyHillStart Assist.
HOLD function
HOLD functionThe HOLD function holdsthevehicle at astand‐still withoutrequiringyoutodepressthe brakepedal, e.g. whilewaiting in traffic.
The HOLD function is only an aid. Theresponsi‐bilityforthevehicle safelystandingstillremainswiththe driver.
System limitationsThe HOLD function is only intendedtoprovideassistance when driving and is not a sufficientmeans of safeguardingthevehicle againstrollingawaywhenstationary.
RThe incline must not be greaterthan 30%.
Activating/deactivating the HOLD function
\nWARNINGRisk of an accident duetotheHOLD function being activated whenyouleavethevehicle
Ifyou leavethevehicle while onlythe HOLDfunction is brakingthevehicle,thevehiclecanrollawayinthefollowing situations:
RIfthere is a malfunction inthe system orinthe power supply.
RIfthe HOLD function is deactivatedbydepressingthe accelerator pedal or brakepedal, e.g.byavehicle occupant.
Always deactivatethe HOLD functionand securethevehicle againstrollingawaybefore leavingthevehicle.
Driving and parking19 5

NOTEDamagefrom automatic braking
If one ofthefollowing functions is switchedon,thevehicle brakes automatically in cer‐tain situations:
RActive Brake Assist
RActive Distance AssistDISTRONIC
RHOLD function
RActiveParking Assist
Toavoid damagetothevehicle, deactivatethese systems inthefollowing or similar sit‐uations:
Duringtowing
In a carwash
Requirements:RThevehicle isstationary.
RThe driver's door is closed orthe seat belt onthe driver's side isfastened.
RThe engine isrunning or has been automati‐cally switched offbythe ECOstart/stopfunction.
RThe electric parking brake isreleased.
RActive Distance AssistDISTRONIC is deacti‐vated.
RThe transmission is in position[,^or\\.
Activating the HOLD function
Depressthe brake pedal and after a shorttimequickly depress further untilthe

The drive program can be adjusted usingtheDYNAMIC SELECT switch.
AIRMATIC
Function of AIRMATICAIRMATIC is an air suspension system withvaria‐ble dampingfor improved driving comfort. Theall-round level control system ensuresthe best
possible suspension and constant ground clear‐ance,even witha ladenvehicle. When driving atspeed,thevehicle is lowered automaticallytoimprove driving safety andtoreduce fuel con‐sumption.You also havethe option of manuallyadjustingthevehicle level.
AIRMATIC includesthefollowing componentsand functions:
RAir suspension with automatic level control
RSpeed-dependent loweringtoreduce fuelconsumption
RManually selectable high-level settingforgreater ground clearance
RADS PLUS (Adaptive Damping System withconstant dampingforce adjustment)
RDYNAMIC SELECT switch and level button
Available suspension tunings
Drive programCharacteristics
A(Comfort)RThe suspension tuning is comfortable.
RThevehicle is settothe normal level.
RWhen driving at speeds above77mph (125 km/h)thevehicle is lowered.
RWhen driving at speeds below 50mph (80 km/h)thevehicle israised again.
;(Economy)RThe suspension tuning is comfortable.
RThevehicle is settothe low level.
RThevehicle is not lowered any further ifyou are traveling at higher speeds.
Driving and parking197

Drive programCharacteristics
C(Sport)RThe suspension tuning isfirmer.
RThevehicle is settothe low level.
RThevehicle is not lowered any further ifyou are traveling at higher speeds.
B(Sport Plus)RThe suspension tuning isevenfirmer.
RThevehicle is settothe low level.
RThevehicle is not lowered any further ifyou are traveling at higher speeds.
Settingthevehicle level
\nWARNINGRisk of accident becausevehicle level istoo high
Ifyou drive at a highervehicle level,the driv‐ingcharacteristics may be impaired duetothe highervehicle center of gravity.
Thevehicle can drift outwards,forexample,whensteering or cornering.
Alwayschoose avehicle level which issuitedtothe drivingstyle andtheroadsurface conditions.
\nWARNINGRisk of entrapment fromvehi‐cle lowering
When loweringthevehicle, people couldbecome trapped iftheir limbs are betweenthevehicle body andthe tires or underneaththevehicle.
Make sure no one is underneaththevehicle or inthe immediate vicinity ofthe wheel arches whenyou lowerthevehicle.
\nWARNINGRisk of entrapment fromvehi‐cle lowering
Vehicles with AIRMATIC or level control:Whenyou unload luggage or leavethevehi‐cle,thevehiclefirstrises slightly andthenreturnstothe set level shortly afterwards.
You or anyone else inthe vicinity ofthewheel arches orthe underbody couldthusbecome trapped.
Thevehicle can also be lowered after beinglocked.
19 8Driving and parking