2019 MERCEDES-BENZ C CLASS Owners Manual

ProblemPossible causes/consequences andPPSolutions
RThere is interference from a powerfulradio signal source.
RThe SmartKeyisfaulty.
Activatethe SmartKeyfunctions (page 65).
Checkthe battery usingthe batterycheck lamp andreplace if necessary (page 66).
Usethe emergencykeytounlockor lockthevehicle (page 66).
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.
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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.
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
\nDANGERRisk 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 openingthe trunk lid:
Pullthe trunk lid handle.
Pull trunk lidremoteoperating switch1.
Press and holdthe

Vehicles with trunk lid convenience clos‐ingfeature:With the trunk lidstopped in anintermediate position, pull it upwards andrelease it as soon as it beginstoopen.With the trunk lid opening heightrestrictionactivated, manually pullthestopped trunk lidupwards.
Vehicles with trunk lid convenience closingfeature:If an objectrestrictsthe trunk lid duringthe automatic opening process, obstacle detec‐tion willstopthe trunk lid. The obstacle detec‐tion function is only an aid and is not a substi‐tuteforyour attentiveness.
Closingthe trunk lid
\nWARNINGRisk of injuryfrom unsecureditems inthevehicle
If objects, luggage or loads are not securedor not secured sufficiently,theycould slip,tipover or bethrown around andthereby hitvehicle occupants.
There is arisk of injury,particularly intheevent of sudden braking or a suddenchangein direction.
Alwaysstowobjects in such awaythattheycannot bethrown around.
Beforethe journey,secure objects, lug‐gageor loads against slipping or tippingover.
Comply withthe loading guidelines whenyou areloadingthevehicle.
\nWARNINGRisk of becoming trappedduring automatic closing ofthe trunk lid
Parts ofthe body could become trapped dur‐ing automatic closing ofthe trunk lid. More‐over,people, e.g.children, may bestandinginthe closing area or may enterthe closingarea duringthe closing process.
Make surethat nobody is inthe vicinityofthe closing area duringthe closingprocess.
Use one ofthefollowing optionstostopthe closing process:
RPressthe

Vehicles with trunk lid convenience clos‐ingfeature:With the trunk lidstopped in anintermediate position, push it downwards.The trunk lid will continuetoclose.
Vehicles with trunk lid convenience clos‐ingfeature and KEYLESS-GO:With thetrunk lid completely opened, pressand holdthe

Inthese situations in particular,thereversingfunction cannot prevent someone being trap‐ped.
When closing, makesurethat no bodyparts are inthe closing area.
If someone is trapped, use one ofthefollowing options:RPressthe

10ft(3 m)awayfromthevehicle insuch situations.
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.
1Detectionrange ofthe sensors
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:
RA person's arms or legs are moving inthesensor detectionrange, e.g. when polishingthevehicle or picking up objects.
RObjects are moved or placed behindthevehi‐cle, e.g.tensioningstraps or luggage.
RClampingstraps,tarps orother coverings arepulledoverthe bumper.
RA protective mat with a lengthreachingoverthe trunk sill down intothe detectionrangeofthe sensors is used.
RThe protective mat is not secured correctly.
RWorkis being undertaken onthe trailer hitch,on trailers orrear bicycleracks.
Deactivate KEYLESS-GO (page 65) or donot carrythe SmartKeyaboutyour person insuch situations.
Switching separate trunk locking on or off
Ifyou centrally unlockthevehicle while separatelocking is activated,the trunk willremain locked.
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Toswitch on:slidethe switchtopositionG.
Toswitch off:slidethe switchtopositionH.
If an accident has been detected,the trunkwill unlockeven if separate locking isswitched on.
Unlockingthe trunk withthe emergencyrelease from inside
RequirementsRThe12‑V‑vehicle battery is connected andcharged.
Press emergencyrelease button1briefly.The trunk lid unlocksand opens.
Activating/deactivating the trunk lid openingheightrestriction
Multimedia system:
VehicleîVehicle SettingsTrunk Lid Restriction
This function allowsyoutoavoid bumpingthetrunk lid on a lowgarageceiling,forexample.
Activatesor deactivateSthe function.
Roller sun blinds
Extendingtherear side windowroller sun‐blinds
NOTEDamagetothe inertiareel duetoit snapping back
If suddenly snapped back,the inertiareelmay be damaged.
Always movetheroller sun blindbyhand.
78Opening and closing