2019 MERCEDES-BENZ S CLASS key

Requirements:RYourequire a CR 2032 3 V cell battery.
Mercedes-Benzrecommendsthatyou havethebatteryreplaced at aqualified specialistwork‐shop.
#Removethe mechanicalkey (→page64).
#Pressrelease button2down fully andremovecover1.
#Removebattery compartment3andtakeoutthe discharged battery.
#Insertthe new battery into battery compart‐ment3. Observethe positive pole markinginthe battery compartment and onthe bat‐tery.
#Push in battery compartment3.
#Replace cover1sothat it engages.
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.
Doors
Unlocking and opening doors fromthe inside
#Tounlockand open a front door:pull doorhandle2.Locking pin1pops up whenthe door isunlocked.
#Tounlockarear door:pulltherear doorhandle.The locking pin pops up whentherear dooris unlocked.
#Toopen arear door:pulltherear door han‐dle again.
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Locking/unlockingthevehicle centrally fromthe inside
#Tounlock:press button1.
#Tolock:press button2.
This does not lock or unlockthe fuelfillerflap.
Thevehicle is not unlocked:
RIfyou havelockedthevehicle usingtheSmartKey.
RIfyou havelockedthevehicle using KEY‐LESS-GO.
Locking/unlockingthevehicle with KEY‐LESS-GO
Requirements:RThe SmartKeyis outsidethevehicle.
RThe distance betweenthe SmartKeyandthevehicle does notexceed 3ft(1 m).
RThe driver's door andthe door at whichthedoor handle is used are closed.#Tounlockthevehicle:touchthe inner sur‐face ofthe door handle.
#Tolockthevehicle:touch sensor surface1or2.
#Convenience closing:touchrecessed sen‐sor surface2for anextended period.
%Further information on convenience closing(→page80).
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Ifyou openthe trunk lid from outside,the trunklid is automatically unlocked.
Problems with KEYLESS-GO
ProblemPossible causes/consequences andPPSolutions
You can no longer lock or unlockthevehicle using KEYLESS-GO.Possible causes are:
RThe SmartKeybattery isweak or discharged.
RThere is interference from a powerfulradio signal source.
RThe SmartKeyis defective.
#Checkthe battery usingthe batterycheck lamp andreplace if necessary (→page64).
#Usethe mechanicalkeytolock or unlockthevehicle (→page64).
#Havethevehicle and SmartKeychecked at aqualified specialistworkshop.
Switchingthe automatic lockingfeatureon/off
Thevehicle is locked automatically whentheignition is switched on andthe wheels are turn‐ingfasterthanwalking pace.
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#Todeactivate:press and hold button1forapproximatelyfiveseconds until an acousticsignal sounds.
#Toactivate:press and hold button2forapproximatelyfiveseconds until an acousticsignal sounds.
Inthefollowing situations,there is a danger ofbeing locked out whenthe function is activated:
RThevehicle is beingtowed/pushed.
RThevehicle is beingtested on a dynamome‐ter.
Information onthe power closing functionfor the doors
Ifyou pushthe door intothe locktothefirstdetent position,the power closing function willautomatically pullthe door intothe lock.
Locking/unlockingthe driver's door withtheemergencykey
%Ifyou wishtolockthevehicle entirely usingthe emergencykey,first pressthe buttonforlocking fromthe inside whilethe driver'sdoor is open. Then proceedtolockthe driv‐er's door usingthe emergencykey.#Insertthe emergencykey asfar as it will gointo opening1inthe cover.
#Pull and holdthe door handle.
#Pullthe cover onthe emergencykey asstraight as possibleawayfromthevehicleuntil itreleases.
#Releasethe door handle.
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#Tounlock:turnthe emergencykey counter-clockwisetopositionG.
#Tolock:turnthe emergencykey clockwisetopositionG.
#Carefully pressthe cover ontothe lock cylin‐der until it engages and is seatedfirmly.
Trunk
Openingthe trunk lid
&DANGERRisk ofexhaustgas poisoning
Combustion engines emit poisonousexhaustgases such as carbon monoxide. Exhaustgases can enterthevehicle interior ifthetrunk lid is open whenthe engine isrunning,especially ifthevehicle is in motion.
#Always switch offthe engine beforeopeningthe trunk lid.
#Never drive withthe trunk lid open.
*NOTEDamagetothe trunk lidbyobsta‐cles abovethevehicle
The trunk lid swings upwards when it isopened.
#Therefore, make surethatthere is suffi‐cient clearance abovethe trunk lid.
You havethefollowing optionsfor openingthetrunk lid:
#Pullthe trunk lid handle.
#Vehicles with trunk lid convenience clos‐ing:With the trunk lidstopped in an inter‐mediate position, pullthe trunk lid upwardsandrelease as soon as it beginstoopen.
#Press and holdthe

When makingthe kicking movement, make surethatyourfeetarefirmly onthe ground,other‐wiseyou could loseyour balance, e.g. on ice.
Requirements:
RThe SmartKeyis behindthevehicle.
RStand at least12in (30 cm)awayfromthevehicle while performingthe kicking move‐ment.
RDo not come into contact withthe bumperwhile makingthe kicking movement.
RDo not carryoutthe kicking movementtooslowly.
RThe kicking movement must betowardsthevehicle and back again.
1Sensor detectionrange
If several consecutive kicking movements arenot successful,waitten seconds.
System limitations
The system may be impaired or may not functionif:
RSnow or dirt, e.g. fromroad salt, coversthesensor area.
RThe kicking movement is made using a pros‐thetic leg.
The trunk lid could be opened or closed uninten‐tionally, inthefollowing situations:
RIf a person's arms or legs are moving inthesensor detectionrange, e.g. when polishingthevehicle, sitting onthe edge ofthe trunk,or picking up objects.
RIf objects are moved or placed behindthevehicle, e.g.charging cables,tensioningstraps or luggage.
RWhenworking onthe trailer coupling, trailersorrear bicycleracks.
Deactivate KEYLESS-GO (→page 63) or do notcarrythe SmartKeyaboutyour person intheseand similar situations.
Switching separate trunk locking on/off
Ifyou centrally unlockthevehicle while separatelocking is activated,the trunk willremain locked.
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#Toswitch on:slidethe switchtopositionH.
#Toswitch off:slidethe switchtopositionG.
%If an accident has been detected,the trunkwill unlockeven if separate locking isswitched on.
Unlockingthe trunk withthe emergencyrelease from inside
Requirements:RThe12Vvehicle battery is connected andcharged.
#Press emergencyrelease button1briefly.The trunk lid unlocksand opens.
Unlockingthe trunk lid usingthe mechanicalkey
#Takethe mechanicalkey out ofthe SmartKey(→page64).
#Insertthe mechanicalkey intothe trunk lockasfar as it will go.
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