ECU MERCEDES-BENZ E CLASS 2019 Service Manual

Applying/releasingthe electric parkingbrake manually
Applying
Push handle1.TheredI(USA) or$(Canada) indica‐tor lamp appears inthe instrument cluster.
The electric parking brake is only securelyapplied ifthe indicator lamp is lit continu‐ously.
Releasing
Switchonthe ignition.
Pull handle1.TheredI(USA) or$(Canada) indica‐tor lamp inthe instrument cluster goes out.
Emergency brakingPress and hold handle1.Whenthevehicle has been brakedto astandstill,the electric parking brake isapplied. TheredI(USA) or$(Can‐ada) indicator lamp appears inthe instru‐ment cluster.
Notes on parkingthevehiclefor anextendedperiod
Ifyou leavethevehicle parkedfor longerthanfourweeks,the disconnected battery may bedamagedbydeep discharge.
Ifyou leavethevehicle parkedfor longerthan sixweeks, it may suffer disuse damage.
Further information can be obtained at aqualified specialistworkshop.
Standby mode (extension of thestarter bat‐tery's period out of use)
Standby mode function
This function is notavailablefor all models.
Ifstandby mode is activated,thevehicle can beparkedfor anextended period of time withoutlosing power.
Standby mode ischaracterizedbythefollowing:
RThestarter battery is preserved.
RThe maximum non-operational time out ofuse is displayed inthe multimedia systemdisplay.
RThe connectiontoonline services is interrup‐ted.
16 4Driving 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

or
ToactivateActive Distance AssistDISTRONIC with astored speed:pressrocker switch4up.Removeyourfootfromthe accelerator pedal.
Ifrocker switch4is pressed up again afteractivation with astored speed,Active Dis‐tance AssistDISTRONIC is activated withthespeedrestriction displayed inthe instrumentcluster.
Toacceptthe displayed speedrestrictionwhenActive Distance Assist DISTRONICis active:pressrocker switch4up (RES).The speed limit displayed inthe instrumentcluster is adopted asthestored speed. Thevehicle adapts its speedtothat ofthevehiclein front, but only uptothestored speed.
TopullawaywithActive Distance AssistDISTRONIC:removeyourfootfromthebrake pedal and activateActive DistanceAssistDISTRONIC.
Pressrocker switch4up (RES).
or
Depressthe accelerator pedal briefly andfirmly.The functions ofActive Distance AssistDISTRONIC continuetobe carried out.
\nWARNINGRisk of accident duetoActiveDistance AssistDISTRONICstill beingactivated whenyou leavethe driver'sseat
Ifyou leavethe driver's seat whilethevehicleis being brakedbyActive Distance AssistDISTRONIC only,thevehicle canrollaway.
Always deactivateActive DistanceAssistDISTRONIC and securethevehi‐cletoprevent it fromrollingawaybeforeyou leavethe driver's seat.
TodeactivateActive Distance AssistDISTRONIC:pressrocker switch4down(CNCL).
Toincrease/reduce speed:pressrockerswitch3up/downtothe pressure point.Thestored speed is increased orreducedby1mph (1km/h).
or
Press and holdrocker switch3up/downtothe pressure point.Thestored speed is increased orreduced inincrements of 1mph (1 km/h).
or
Pressrocker switch3beyondthe pressurepoint.Thestored speed is increased orreducedby5mph (10 km/h).
or
Press and holdrocker switch3beyondthepressure point.Thestored speed is increased orreduced inincrements of 5mph (10 km/h).Toincrease orreduce the specified dis‐tance fromthevehicle in front:pressrocker switch2up or down.
Function ofActive Speed Limit Assist
Thefollowing function is country-dependentand onlyavailable in conjunction withtheDriving AssistancePackage.
18 0Driving and parking

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

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 orthebrake pedal, e.g.byavehicle occupant.
RIfthe electrics inthe engine compart‐ment,the battery orthe fuses aretam‐pered with or ifthe battery is disconnec‐ted.
Always deactivatethe HOLD functionand securethevehicle againstrollingawaybefore leavingthevehicle.
NOTEDamagefrom automatic braking
WhenActive Brake Assist,Active DistanceAssistDISTRONIC orthe HOLD function areactivated,thevehicle brakes autonomouslyin certain situations.
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 not acti‐vated.
Driving and parking18 9

Deactivating/activating maneuvering assis‐tanceMultimedia system:
VehiclekAssistance Camera &
ParkingManeuvering Assist.
Activatesor deactivateSthe function.
Maneuvering assistance mustbe activeforthe function of DriveAwayAssist(→page 207) and CrossTraffic Alert(→page208).
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,
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‐
Driving and parking209

RActive Distance AssistDISTRONIC(→page177)
NOTEEngine damageduetoexcessivelyhigh engine speeds
The engine will be damaged ifyou drive withthe engine intheoverrevvingrange.
Do not drive with the engine intheover‐revvingrange.
The fuel supply is interruptedtoprotecttheengine whenthered mark ontachometer3(overrevvingrange) isreached.
During normal operating conditions, coolanttemperature display4mayrisetotheredmark.
\nWARNINGDanger of burns when open‐ingthe hood
Ifyou openthe hood whenthe engine hasoverheated or during afireinthe enginecompartment,you could come into contactwith hotgases orother escaping operatingfluids.
Before openingthe hood, allowtheenginetocool down.
Intheevent of afireinthe engine com‐partment,keepthe hood closed andcallthefireservice.
Vehicles with a 48 V on-board electrical sys‐tem (EQ Boosttechnology)
1POWER showsthe electric drive support
2CHARGE showstherecuperation power ofthe electric motor

and traffic conditions and operatetheequipment withthevehiclestationary.
Whentelephoning,you must observethe legalrequirementsforthe countryin whichyou arecurrently driving.
Requirements:RThe mobile phone is connectedtothe multi‐media system.
On-board computer:
Phone
Vehicles withthe COMAND multimedia sys‐tem:The mostrecenttelephone calls (dialed,received and missed calls) are displayed onthePhonemenu.
Toselect an entry:swipe upwards or down‐wards onthe left-handTouch Control.
Pressthe left-handTouch Control.Ifthere is only onetelephone numbersavedtoan entry:thetelephone numberwill be selected.
Ifthere are multipletelephone numberssavedtoan entry:swipe upwards or down‐
wards onthe left-handtouch controltoselectthe desiredtelephone number.
Pressthe left-handTouch Control.Thetelephone number will be dialed.
Thefollowing displaysmay appear instead ofthetelephone numbers dialed:
RPlease Wait...:the application isstarting. If a
Bluetooth®connectiontothe mobile phoneis not established,the menufor authorizingand connecting a mobile phone will be dis‐played onthe multimedia system(→page 298).
RUpdating data...:the call list is being upda‐ted.
RImporting Contacts...: contacts are beingimported fromthe mobile phone or astoragemedium.
Accepting/rejecting a callVehicles with Head-up Display:whenyoureceivea call,theIncoming Callmessage willappear onthe Head-up Display.
Swipe upwards or downwards onthe left-handTouch Control and selecta(Accept)orv(Reject).
Pressthe left-handTouch Control.
You may accept/rejectthe call using buttonaorvonthesteering wheel.
Adjusting the Head-up Displaysettings onthe on-boardcomputer
On-board computer:
HUD
Thefollowing Head-up Display settings can beadjusted:
RPosition
RBrightness
RDisplay Content
Toselect a setting:swipe upwards or down‐wards onthe left-handTouch Control.
Pressthe left-handTouch Control.
Toadjust avalue:swipe upwards or down‐wards onthe left-handTouch Control.
230Instrument Display and on-board computer

Example:renamingfavorites
Call upthe "Renamingfavorites" function(→page 253).
Toenter acharacter:useyourfingertowritecharacters onthetouchpad.Thecharacter is entered inthe input line. Ifdifferent interpretations are possible,charac‐ter suggestions are displayed.
Toselect acharacter suggestion:swipe upor down onthetouchpad.
Resumecharacter input.
Toenter a space:swiperight whenthe cur‐sor is located inthe input line.
Todelete acharacter:swipe left whenthecursor is located inthe input line.
Toconfirmthe entry:pressthetouchpad.Tofinishcharacter entry:swipe upwards.
or
Pressthe8button.
Example: entering a destination (navigation)
Enterthe POI or address (→page271).
System settings
Display
Configuring display settingsMultimedia system:
SystemCDisplay and Designs
Styles
SelectDesigns.
SelectSport,ClassicorProgressive.
Adaptingthe ambient lightingfor thestyle
SelectAdjust Amb. Lighting.Activatesor deactivateSthe function.
This function adjuststhe ambient lightingforthe selected displaystyle.
Settingthe display brightness
SelectDisplay Brightness.
Select a brightnessvalue.
Switchingthe display off/on
Off:selectDisplay Off.
On:press a button,+,forexample.
Displaydesign
SelectDay/Night Design.
SelectAutomatic,Day DesignorNightDesign.
Additional displayareaDepending onthevehicle,various items of addi‐tional information can be shown. The additionaldisplay area comprisesthe left-hand orright-handthird ofthe display.
SelectAdditional Disp. Area.
Thefollowing display content can be selected:
RDynamic
Multimedia system257

The date is set automatically via GPS.
Connectivity
Switching transmission ofthevehicle posi‐tion on/offMultimedia system:
SystemöConnectivity
SelectTransmit Vehicle Pos..
Activatesor deactivateSthe function.
Bluetooth®
Information about Bluetooth®
Bluetooth®technology is astandardfor short-range wireless data transfer uptoapproximately32.8ft(10 m).
You can use Bluetooth®toconnectyour mobilephonetothe multimedia system and usethefol‐lowing functions,forexample:
Rhands-free system with accesstothefollow‐ing options:
-contacts (→page303)
-call lists (→page 305)
-text messages
RInternet connection
Rlisteningtomusic via Bluetooth®audio(→page 333)
Rtransferring business cards (vCards) intothevehicle
Bluetooth®is aregistered trademark of Blue‐tooth Special Interest Group (SIG) Inc.
Internet connection via Bluetooth®is notavailable in all countries.
Activating/deactivating Bluetooth®
Requirementsfor switching off Bluetooth®:RApple CarPlay™ is not active.
Multimedia system:
SystemöConnectivity
Activatesor deactivateSBluetooth®.
If AndroidAutois active, a promptappears ask‐
ing whether Bluetooth®should be deactivated.
SelectYes.
AndroidAutois closed and Bluetooth®isdeactivated.
Wi-Fi
Wi-Fi connectionoverviewYou can useWi-Fitoestablish a connection withaWi-Fi network andtoaccessthe Internet orother network devices.
Thefollowing connection options areavailable:
RWi-Fi connection
TheWi-Fi connectiontoaWi-Fi-capabledevice, e.g.the customer's mobile phone oratablet PC is established.
RMultimedia system as aWi-Fi hotspot
Usingthis function, atablet PC or notebookcan be connected,forexample.
Toestablish a connection,you can usethefol‐lowing methods:
RWPS PIN
The connectiontoa secureWi-Fi network ismade via a PIN.
Multimedia system259