ECU MERCEDES-BENZ C CLASS 2019 Workshop Manual

Enterthis securitykey onthe multimedia sys‐tem.
Confirmthe entrywith¡.
All devices support a securitykey as ameans of connection.
Using a WPS PIN
Highlight aWi-Fi network inthe list.
Select

Pressthe WPS button onthe devicetobeconnected or selectConnect.
SelectContinueinthe multimedia system.
Connecting using a securitykey
SelectConnect Device to Vehicle Hotspot.A securitykey is displayed.
Selectthevehicle fromthe devicetobe con‐nected. Thevehicle is displayed withtheSSIDMB Hotspot XXXXX.
Enterthe securitykey which is shown inthemedia display onthe devicetobe connected.
Confirmthe entry.
Connecting using NFC
SelectConnection via NFC.
Activate NFC onthe mobile device (seethemanufacturer's operating instructions).
Bringthe mobile device intothe NFC area ofthevehicle (page 307).
SelectDone.The mobile device is now connectedtothemultimedia system hotspot via NFC.
Generating a new securitykey:
SelectSet Up Hotspot.
SelectGenerate Security Key.A connection will be established withthenewly created securitykey.
Tosavea securitykey:selectSave.When a new securitykey is saved, allexistingWi-Fi connections arethen disconnected. IftheWi-Fi connections are beingre-estab‐lished,the new securitykey must be entered.
Managing COMANDTouch devices
Requirements:RTheCOMANDTouch app is installed ontheexternal device (e.g.tablet or smartphone).
RWi-Fi is activated (page 266) andthemultimedia system is configured as aWi-Fihotspot (page267).
Multimedia system:
SystemCOMAND Touch
Connecting and authorizing a new device
SelectAuthorize a New Device.
SelectConnect New Device.
Enterthe securitykey intheexternal device.ThePlease start COMAND Touch on yourdevice and follow the instructions.messageappears.
SelectContinue.
Acceptthe connectionrequest fromthe newdevice.
Enterthe PIN shown ontheexternal device.The device is authorized.
Authorizing a connected device
SelectAuthorize a New Device.The devices already connected are displayed.
SelectContinue Using Connected Devices.ThePlease start COMAND Touch on yourdevice and follow the instructions.messageappears.
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the mobile phone connection inyourvehicleand, as an option, installed automatically.Yo ucan monitorthestatus ofyour updates ontheMercedes me portal andfind information aboutpotential innovations.
Your advantages at aglance:
Rconvenientlyreceivesoftware updates viathe mobile phone network
Rimprovesthequality andavailability ofMercedes me connect services
Rkeepsyour multimedia system and communi‐cation module up-to-date
Further information about software updates canbefound at http://me.mercedes-benz.com
Performing a software update
Requirements:RThere is an Internet connection(page 324).
RFor automatic updates:yourvehicle has apermanentlyinstalled communication mod‐ule.
Multimedia system:
SystemSoftware Update
Automatic update
SwitchAutomatic Online Updateons.Updates are performed.
The currentstatus ofthe updates is dis‐played.
Manual update
DeactivateSAutomatic Online Update.
Select an update fromthe list andstarttheupdate.
Activating the softwareupdate
Restartthe system.
Function of important system updatesImportant system updates may be necessaryforthe security ofyour multimedia system's data.Please installthese updates, or elsethe securityofyour multimedia system cannotbe ensured.
If automatic software updates are activated,the system updates will be downloaded auto‐matically (page273).
As soon as an updateisavailablefor download,a corresponding message appearsonthe mediadisplay.
You havethefollowing selection options:
RDownload
The update will be downloaded inthe back‐ground.
RDetails
Information aboutthe pending systemupdate is displayed.
RLater
The update can be downloaded manually at alater time (page273).
Ifthe download is completed andthe update isreadyfor installation,you will be informed ofthisafterthe next ignition cycle,forexample.
Parkthevehicle safely in a suitable locationbeforestartingthe installation.
Requirementsforthe installation:
RThe ignition is switched on.
RThe engine is notrunning.
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Connecting a mobile phone (authorizationusing Secure SimplePairing)
Selectthe mobile phone.A code is displayed inthe multimedia systemand onthe mobile phone.
Ifthe codes match:confirmthe code onthe mobile phone.
Connecting a mobile phone (authorizationbyentering a passkey)
Selectthe mobile phone.
Choose a onetosixteen-digit number combi‐nation as a passkey.
Onthe multimedia system:enterthe pass‐key and selectv.
Onthe mobile phone:enterthe passkeyagain and confirm.
Upto15mobile phones can be authorizedonthe multimedia system.Authorized mobile phones arereconnectedautomatically.
Connecting a second mobile phone (twophone mode)
Requirements:RAtleast one mobile phone is already connec‐
tedtothe multimedia system via Bluetooth®.
Multimedia system:
Phone

The Mercedes-Benz Customer Center andtheMercedes-Benz emergency call center areavaila‐bleforyou aroundthe clock.
The me button andthe SOS button can befoundonthevehicle'soverhead control panel(page319).
You can also callthe Mercedes-Benz CustomerCenter usingthe multimedia system(page319).
Pleasenotethat Mercedes me connect is aMercedes-Benz service. In emergencies, alwayscallthe national emergency servicesfirst usingthestandard national emergency service phonenumbers. In emergencies,you can also usetheMercedes-Benz emergency call system(page 321).
Observethe conditions of usefor Mercedes meconnect andother services. These can beobtained inthe Mercedes me portal: https://me.secure.mercedes-benz.com
Callingthe Mercedes-Benz Customer Centerusing the multimedia system
Requirements:RYou haveaccesstoa GSM network.
RThe contract partner's GSM network cover‐age isavailable intherespectiveregion.
RThe ignition is switched on sothatvehicledata can be transferred automatically.
Multimedia system:
PhoneªContacts
CallMercedes me connect.The call is made.
Then,you can select a service and be con‐nectedtoa specialist atthe Mercedes-BenzCustomer Center.
Making a call viatheoverhead control panel
Requirements:RYou haveaccesstoa GSM network.
RThe contract partner's GSM network cover‐age isavailable intherespectiveregion.
RThe ignition is switched on sothatvehicledata can be transferred automatically.
1Service call button (me button)
2SOS button cover
3SOS button
Tomake a service call:press button1.
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employee deals withyour appointment. Theinformation isthen senttoyour desiredservice outlet.
This service outlet willthen contactyouwithin24hours.
Ifyou selectLaterafterthe service messageappears,the message is hidden andreap‐pears after a certain period of time.
Transferred data during a service call
Observethe conditions of usefor Mercedes meconnect andother services. These can beobtained inthe Mercedes me portal: https://me.secure.mercedes-benz.com
Whenyou make a service call via Mercedes meconnect, data will be transmitted.
Thefollowing data is transmitted if a service callis made via Mercedes me connect:
RVehicle identification number
RReasonforthe initiation ofthe call
Mercedes-Benz emergency call system
Information onthe Mercedes-Benz emer‐gency call systemYourvehicle is equipped withthe Mercedes-Benzemergency call system ("eCall"). Thisfeature canhelp savelives intheevent of an accident. eCallin nowayreplaces assistance provided fromdialing911.
The Mercedes-Benz emergency call system isavailablefor at leasttenyearsstarting fromthemanufacturing date.
Mercedes-Benz eCall only functions in areaswhere mobile phone coverageisavailable fromthe wireless service providers. Insufficient net‐workcoveragefromthe wireless service provid‐ers mayresult in an emergency call not beingtransmitted.
eCall is astandardfeature inyour Mercedes-Benzvehicle. In ordertofunction as intended,the systemrelies onthe transmission of datadetailed inthe "Mercedes-Benz emergency callsystem data transmission" sectionthatfollows(page 323).
Todisable eCall, a customer must visit anauthorized Mercedes-Benz Service departmenttodeactivatethevehicle's communication mod‐ule.
Deactivation ofthis module preventstheactivation of any and all Mercedes me con‐nect services. After the deactivation ofeCall, automatic emergency call and manualemergency call will not beavailable.
The ignition must be switched on before an auto‐matic emergency call can be made.
eCall is activated atthefactory.
eCall can be deactivatedbyan authorizedMercedes-Benz dealer. Please notethat intheeventownership ofthevehicle is trans‐ferredtoanotherowner in its deactivatedstate, eCall willremain deactivated unlessthe newowner visits an authorizedMercedes-Benz dealershiptoreactivatethesystem.
Overview ofthe Mercedes-Benz emergencycall systemeCall can helptoreducethe time between anaccident andthe arrival of emergency services
Multimedia system321

Ifthe indicator/warning lamps inthe instrumentcluster do not light up at lowtemperatures, it isverylikelythatthe discharged battery has fro‐zen. Inthis caseyou may neither jump-startthevehicle norchargethe battery.
The service life of a batterythat has beenthawed may be dramatically shortened. Thestartingcharacteristics may be impaired, espe‐cially at lowtemperatures.
It isrecommendedthatyou haveathawed bat‐terychecked at aqualified specialistworkshop.
AllvehiclesPlug-inhybrid:observethe notes inthe Supple‐ment. Otherwise,you mayfailtorecognize dan‐gers.
NOTEDamagecausedbynumerous orextended attemptstostartthe engine
Numerous orextended attemptstostarttheengine may damagethe catalytic converterduetonon-combusted fuel.
Avoid numerous andextended attemptstostartthe engine.
Observethefollowing points duringstartingassistance and whenchargingthe battery:
ROnly use undamaged jumper cables/charg‐ing cables with a sufficient cross-section andinsulatedterminal clamps.
RNon-insulated parts oftheterminal clampsmust not come into contact withother metalparts whilethe jumper cable/charging cableis connectedtothe battery/jump-startcon‐nection point.
RThe jumper cable/charging cable must notcome into contact withany parts which maymovewhenthe engine isrunning.
RAlways make surethat neitheryou northebattery is electrostaticallycharged.
RKeepawayfromfireand openflames.
RDo not leanoverthe battery.
Observethe additionalfollowing points whenchargingthe battery:
ROnly use batterychargerstested andapprovedfor Mercedes-Benz.
RReadthe batterycharger's operating instruc‐tions beforechargingthe battery.
Observethe additionalfollowing points duringstarting assistance:
RStarting assistance may only be providedusing batteries with a nominalvoltage of12V.
RThevehicles must nottouch.
RGasoline engine:Onlyacceptstarting assis‐tance ifthe engine andexhaust system arecold.
Starting assistance andchargingthe12 Vbattery
Requirements:RThevehicle is secured withthe electric park‐ing brake.
RAutomatic transmission:The transmissionis in position].
RThe ignition and all electrical consumers areswitched off.
RThe hood is open.
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Make surethatthesteering wheel canmovefreely, beforetowingthevehicleaway.
NOTEDamageduetoexcessive tractivepower
Ifyou pullawaysharply,the tractive powermay betoo high andthevehicles could bedamaged.
Pullawayslowly and smoothly.
Loading thevehiclefor transport
Observethe notes ontowingaway(page 382).
Connectthetow bartothetowingeye inordertoloadthevehicle.
Vehicles with automatic transmission:Shiftthe automatic transmissiontoposition\\.
Vehicles with automatic transmission:The automatic transmission may be locked
in position]intheevent of damagetotheelectrical system.Toshiftto\\, providetheon-board electrical system with power(page379).
Loadthevehicle ontothe transporter.
Vehicles with automatic transmission:Shiftthe automatic transmissiontoposition].
Usethe electric parking braketosecurethevehicle againstrollingaway.
Only securethevehiclebythe wheels.
Vehicles with ADS PLUS (Adaptive DampingSystem PLUS)
\nWARNINGRisk of an accident whentransportingvehicles withAdaptiveDamping System PLUS
Thereduced dampingforces onthevehiclebeing transported can causethevehicle/trailer combinationtostarttoswing.
As aresult, when transportingvehicles withtheAdaptive Damping System PLUS,the
vehicle/trailer combination maystarttoskid.Consequently,you could lose control ofyourvehicle.
When transporting, ensurethat:RThevehicle has been loaded ontothe transporter correctly
RThevehicle is secured at allfourwheels with suitabletensioningstraps
RThe maximum permissible speed of35mph (60 km/h) is notexceededwhen transporting
NOTEDamagetothevehicle from secur‐ing it incorrectly
After loading,thevehicle must besecured at allfour wheels. Otherwise,thevehicle could be damaged.
A minimum distance of 8 in (20 cm) upand 4 in (10 cm) down mustbekepttothe transport platform.
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Securethevehicle on allfour wheels afterloading.
4MATICvehicles/vehicles with automatictransmission
Make surethatthe front andrear axles cometorestonthe same transportationvehicle.
NOTEDamagetothe drivetrain duetoincorrect positioning
Do not positionthevehicle abovetheconnection point ofthe transportvehi‐cle.
Towingeyestoragelocation
Towingeye1is located inthestowage spaceunderthe trunkfloor.
Installingthetowingeye
Pressthe mark on cover1inwards andremove.
Screwinthetowingeyeclockwise asfar as itwill go and tighten.
Make surethat cover1engages inthebumper whenyouremovethetowingeye.
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NOTEDamageduetoincorrect use ofthetowingeye
When atowingeye is usedtorecover avehi‐cle,thevehicle may be damaged inthe proc‐ess.
Only usethetowingeyeto towawayortowstartthevehicle.
Towstartingthevehicle (emergency enginestart)
Vehicles with automatic transmission
NOTEDamagetothe automatic trans‐mission dueto towstarting
The automatic transmission may be damagedinthe process oftowstartingvehicles withautomatic transmission.
Vehicles with automatic transmissionmust not betowstarted.
Vehicles with automatic transmission mustnot betow-started.
Electrical fuses
Notes on electrical fuses
\nWARNINGRisk of accident and injurydueto overloaded lines
Ifyou manipulate or bridge afaulty fuse or ifyoureplace it with a fuse with a higheramperage,the electric line could beoverloa‐ded.
This couldresult in afire.
Alwaysreplacefaulty fuses with speci‐fied new fuses containingthe correctamperage.
NOTEDamageduetoincorrect fuses
Electrical components or systems may bedamagedbyincorrect fuses, ortheir func‐tionality may be significantlyimpaired.
Only use fusesthat havebeen approvedbyMercedes-Benz and which havethecorrect fuserating.
Blown fuses mustbereplaced with fuses ofthesamerating, whichyou canrecognizebythecolor and fuserating. The fuseratings and fur‐ther informationtobe observed are listed inthefuse assignment diagram.
Fuse assignment diagram:onthe fuse box inthe trunk (page 388).
NOTEDamageor malfunctions causedbymoisture
Moisture may cause damagetothe electricalsystem or cause ittomalfunction.
Whenthe fuse box is open, make surethat no moisture can enterthe fusebox.
When closingthe fuse box, make surethatthe seal ofthe lid is positioned cor‐rectly onthe fuse box.
Ifthe newly inserted fuse also blows, havethecause traced andrectified at aqualified special‐istworkshop.
Ensurethefollowing beforereplacing a fuse:
RThevehicle is secured againstrollingaway
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