2019 MERCEDES-BENZ E CLASS key battery

SmartKey
Overview of SmartKeyfunctions
\nWARNINGRisk of accident and injuryduetochildren left unattended inthevehicle
Ifchildren are left unattended inthevehicle,theycould:
ROpen doors,thereby endangeringotherpersons orroad users.
RGet out ofthevehicle and be hitbyoncoming traffic.
ROperate vehicle equipment and becometrapped,forexample.
In addition,children could also setthevehi‐cle in motion,forexample,by:
RReleasingthe parking brake.
RShiftingthe automatic transmission outof park position]or shifting manualtransmission into neutral.
RStartingthe engine
When leavingthevehicle, alwaystakethe SmartKeywithyou and lockthevehicle.
Never leavechildren and animals unat‐tended inthevehicle.
Keepthe SmartKeyout ofreach ofchil‐dren.
NOTEDamagetothekey causedbymagneticfields
Keepthekeyawayfromstrong mag‐neticfields.
1Locks
2Batterycheck lamp
3Unlocks
4Opens/closesthe trunk lid
5Panic alarm
The SmartKey mayvaryfromthe one showninthe diagram, depending onthevehicleequipment.
The SmartKeylocksand unlocksthefollowingcomponents:
Rthe doors
Rthe trunk lid
Rthe fuelfillerflap
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Ifthevehicle is not opened within approximately40 seconds after unlocking, it locksagain. Anti-theft protection is activated again.
Do notkeepthe SmartKeytogether with elec‐tronic devices or metal objects. This can affectthe SmartKey's functionality.
If batterycheck lamp2does not light upafter pressingthe6or7button,thebattery is discharged.
Replacingthe SmartKeybattery (→page64).
Activating/deactivating the acoustic lockingverification signal
Multimedia system:
VehicleîVehicle SettingsAcous-
tic Lock
Activatesor deactivateSthe function.
Activating/deactivating the panic alarm
Requirements:RThe ignition is switched off
The panic alarm function is onlyavailable incertain countries.
Toactivate:press button1for approx‐imatelyone second.A visual and audible alarm is triggered.Todeactivate:briefly press button1again.
or
Pressthestart/stop button onthe cockpit(the SmartKeyis insidethevehicle).
Changingthe unlocking settings
Possible unlocking functions ofthe SmartKey:
RCentral unlocking
RUnlockingthe driver's door and fuelfillerflap
Toswitch between settings:pressthe6and7buttons simultaneouslyforapproximately six seconds untilthe batterycheck lampflashes twice.
Ifthe unlocking functionforthe driver's doorand fuelfillerflap has been selected:
RPressingthe6button a second time cen‐trally unlocksthevehicle
RVehicles with KEYLESS-GO:Ifyoutouchthe inner surface ofthe door handle onthedriver's door, onlythe driver's door and fuelfillerflap are unlocked.
Deactivatingthe SmartKeyfunctions
Ifyou do not usethevehicle or a SmartKey foranextended period of time,you canreducetheenergy consumption oftherespective Smart‐Key .Todo so, deactivatethe SmartKeyfunc‐tions.
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Todeactivate:pressthe7button ontheSmartKeytwice inquick succession.The batterycheck lamp ofthe SmartKeyflashes twice brieflyand lights up once.
Toactivate:press any button onthe Smart‐Key.
Whenthevehicle isstarted withthe Smart‐Key inthestowage compartment ofthe cen‐ter console,the SmartKeyfunctions areautomaticallyactivated (→page139).
Removing/inserting the emergencykey
Toremove:pressrelease button1.Emergencykey2is pushed out slightly.
Pull out emergencykey2until it engages inthe intermediate position.
You can usethe intermediate position ofemergencykey2toattachthe SmartKeytoakeyring.
Pressrelease button1again and fullyremoveemergencykey2.
Toinsert:pressrelease button1.
Insert emergencykey2tothe intermediateposition or fully until it engages.
Replacing the SmartKeybattery
\nDANGERSerious damagetohealthcausedbyswallowing batteries
Batteries containtoxic and corrosive sub‐stances. Swallowing batteries may causeserious damagetohealth.
There is arisk offatal injury.
Keep batteries out ofthereach ofchil‐dren.
If batteries are swallowed, seek medicalattention immediately.
ENVIRONMENTALNOTEEnvironmentaldamagecausedbyimproper disposal ofbatteries
Batteries contain pollutants. It isillegaltodispose ofthem withthe householdrubbish.

Dispose of batteries in anenvironmentallyresponsible manner.Takedischarged batteriestoaqualifiedspecialistworkshop ortoa collectionpointfor used batteries.
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Requirements:RYourequire a CR 2032 3 V cell battery.
Mercedes-Benzrecommendsthatyou havethebatteryreplaced at aqualified specialistwork‐shop.
Removethe emergencykey (→page64).
Pressrelease button2down fully and slidecover1inthe direction ofthe arrow.
Fold out cover1inthe direction ofthearrowandremove.
Removebattery compartment3andtakeoutthe discharged battery.
Insertthe new battery into battery compart‐ment3. Observethe positive pole markinginthe battery compartment and onthe bat‐terywhen doingthis.
Push in battery compartment3.
Re-attach cover1and push it until itengages.
Problems withthe SmartKey
ProblemPossible causes/consequences andPPSolutions
You can no longer lock or unlockthevehicle.Possible causes are:
RThe SmartKeybattery is discharged or nearly discharged.
RThere is interference from a powerfulradio signal source.
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ProblemPossible causes/consequences andPPSolutions
RThe SmartKeyis defective.
Checkthe battery usingthe batterycheck lamp andreplace if necessary (→page64).
Usethe emergencykeytolock or unlock (→page64).
Havethe SmartKeychecked at aqualified specialistworkshop.
You havelost a SmartKey.Havethe SmartKeydeactivated at aqualified specialistworkshop.
If necessary,havethe mechanical lockchanged aswell.
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Tounlockthevehicle:touchthe inner sur‐face ofthe door handle.
Tolockthevehicle:touch sensor surface1or2.
Convenience closing:touchrecessed sen‐sor surface2untilthe closing procedure iscomplete.
Further information on convenience closing(→page79).
Ifyou openthe trunk lid from outside it is auto‐matically unlocked.
Problems with KEYLESS-GO
ProblemPossible causes/consequences andPPSolutions
You can no longer lock or unlockthevehicle using KEYLESS-GO.Possible causes are:
RThe SmartKeyfunctions havebeen deactivated (→page 63).
RThe SmartKeybattery is discharged or nearly discharged.
RThere is interference from a powerfulradio signal source.
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ProblemPossible causes/consequences andPPSolutions
RThe SmartKeyisfaulty.
Activatethe SmartKeyfunctions (→page 63).
Checkthe battery usingthe batterycheck lamp andreplace if necessary (→page64).
Usethe emergencykeytounlockor lockthevehicle (→page64).
Havethevehicle and SmartKeychecked at aqualified specialistworkshop.
Activating/deactivating the automatic lock‐ingfeature
Thevehicle is locked automatically whentheignition is switched on andthe wheels are turn‐ingfasterthanwalking pace.
Toactivate:press and hold button2forapproximatelyfiveseconds until an acousticsignal sounds.
Todeactivate:press and hold button1forapproximatelyfiveseconds until an acousticsignal sounds.
Inthefollowing situations,there is a danger ofbeing locked out whenthe function is activated:
RWhilethevehicle is beingtowstarted/pushed.
RThevehicle is beingtested onthe dynamom‐eter.
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ProblemPossible causes/consequences andPPSolutions
Repeatthe previousstep.The side window is closed withoutthe automaticreversing function.
The side windowscannot be opened orclosed usingthe convenience openingfeature.
The SmartKeybattery is discharged or nearly discharged.
Checkthe battery usingthe batterycheck lamp andreplace if necessary (→page64).
Sliding sunroof
Opening and closingthe sliding sunroof
Theterm"sliding sunroof" alsoreferstothepanoramic sliding sunroof.
\nWARNINGRisk of becoming trappedwhile opening and closingthe slidingsunroof
During opening and closing, parts ofthebody couldgetcaught inthe sweep ofthesliding sunroof.
When opening or closing, make surethat no body parts are inthe sweep.
Releasethe button immediately ifsomebody becomes trapped.
or
Pressthe button in any direction duringthe automatic opening/closing process.The opening/closing process isstop‐ped.
\nWARNINGRisk of becoming trapped ifthe sliding sunroof is operatedbychil‐dren
Children operatingthe sliding sunroof couldgetcaught inthe moving parts, particularly ifunattended.
Never leavechildren unattended inthevehicle.
When leavingthevehicle, alwaystakethekey withyou and lockthevehicle.
\nWARNINGRisk of becoming trappedwhile opening and closingtheroller sunblind
When opening or closing, make surethat nobody parts become trapped betweentheroller sun blind and frame orthe sliding sun‐roof.
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