2019 MERCEDES-BENZ C CLASS Owners Manual

ProblemPossible causes/consequences andPPSolutions
The sliding sunroof cannotbe closedandyou cannot seethe cause.\nWARNINGRisk of becoming trapped orfatal injurybyclosingthe sliding sunroof again
Ifyou closethe sliding sunroof again immediately after it has been blocked orreset,the sliding sunroofcloses with increasedforce.
Parts ofthe body could become trapped inthe closing area inthe process.
Make surethat no parts ofthe body are inthe closing area.Releasethe button immediately if somebody becomes trapped.
or
Pressthe button in any direction duringthe automatic closing process.The closing process isstopped.
Ifthe sliding sunroof is obstructed during closing andreopens again slightly:
Immediately after automaticreversing, pull and holdtheWbutton down againtothe point ofresist‐ance untilthe sliding sunroof is closed.The sliding sunroof will be closed with increasedforce.
Ifthe sliding sunroof is obstructed again andreopens again slightly:
Repeatthe previousstep.The sliding sunroof will be closed again with increasedforce.
Opening and closing87

ProblemPossible causes/consequences andPPSolutions
Vehicles without a panoramic slid‐ing sunroof:The sliding sunroof doesnot operate smoothly.
PushtheWbutton uptothe point ofresistance untilthe sliding sunroof is fully open.
PresstheWbuttonfor another second.
Closethe sliding sunroof.
Vehicles with a panoramic slidingsunroof:The sliding sunroof ortheroller sunblind does not operatesmoothly.
Pulland holdtheWbutton littlebylittle untilthe sliding sunroof is fully closed.
Pull and holdtheWbutton littlebylittle untiltheroller sunblind is fully closed.
Use automatic operationtofully open andthen closethe sliding sunroof.
Anti-theft protection
Function ofthe immobilizer
The immobilizer preventsyourvehicle from beingstarted withoutthe correct SmartKey.
The immobilizer is automatically activated whenthe ignition is switched off and deactivated whenthe ignition is switched on.
When leavingthevehicle, alwaystakethe Smart‐Key withyou and lockthevehicle. Anyone canstartthe engine if avalid SmartKeyhas been leftinsidethevehicle.
Intheeventthe engine cannotbestarted(yetthevehicle’sstarter battery ischarged),the system is not operational. Contact anauthorized Mercedes-Benz Center or call1-800-FOR-MERCedes (inthe USA) or1-800-387-0100(in Canada).
ATA(anti-theft alarmsystem)
Function oftheATAsystem
IftheATAsystem is armed, a visual and audiblealarm is triggered inthefollowing situations:
Rwhen a door is opened
Rwhenthe trunk lid is opened
Rwhenthe hood is opened
TheATAsystem is armed automatically afterapproximatelyten seconds inthefollowing situa‐tions:
Rafter lockingthevehicle withthe SmartKey
Rafter lockingthevehicle using KEYLESS-GO
88Opening and closing

Indicator lamp1flashes whentheATA systemis armed.
TheATA system is deactivated automatically inthefollowing situations:
Rafter unlockingthevehicle withthe SmartKey
Rafter pressingthestart/stop button withtheSmartKeyinthestowage compartment(page145)
Rafter unlockingthevehicle using KEYLESS-GO
Whenthe Mercedes‑Benz emergency callsystem is active andthe alarmstays onformorethan 30 seconds, a message is auto‐matically senttothe Customer AssistanceCenter (page322).
DeactivatingtheATAPressthe6,7or

Notes onthe correct driver's seat position
\nWARNINGRisk of injuryfrom adjustingthevehicle settings whilethevehicle is inmotion
You could lose control ofthevehicle inthefollowing situations:
Rifyou adjustthe driver's seat,the headrestraint,thesteering wheel orthe mirrorwhilethevehicle is in motion
Rifyoufastenyour seat belt whilethevehi‐cle is in motion
Beforestartingthe engine: adjustthedriver's seat,the headrestraint,thesteering wheel orthe mirror andfastenyour seat belt.Ensurethefollowing when adjustingthesteeringwheel1, seat belt2and driver's seat3:
Ryou are asfarawayfromthe driver's airbagas possible
Ryou are sitting in an upright position
Ryourthighs are slightlysupportedbythe seatcushion
Ryour legs are not fullyextended andyou candepressthe pedals properly
Rthe back ofyour head is supported ateyelevelbythe center ofthe headrestraint
Ryou can holdthesteering wheel withyourarms slightly bent
Ryou can moveyour legs freely
Ryou can see allthe displaysonthe instru‐ment cluster clearly
Ryou havea goodoverview ofthe traffic con‐ditions
Ryour seat belt is pulled snuglyagainstyourbody and isrouted acrossthe center ofyourshoulder and acrossyour hips inthe pelvicarea
90Seats andstowing

Seats
Adjusting the front seat mechanically andelectrically (without Seat ComfortPackage)
\nWARNINGRisk of becoming trapped ifthe seats are adjustedbychildren
Children could become trapped iftheyadjustthe seats, particularly when unattended.
When leavingthevehicle, alwaystakethe SmartKeywithyou and lockthevehicle.
Never leavechildren unattended inthevehicle.
The seats can be adjusted whenthe ignition isswitched off.
\nWARNINGRisk of becoming trappedwhen adjustingthe seats
Whenyou adjust a seat,you orothervehicleoccupants could become trapped, e.g. ontheseat guiderail.
When adjusting a seat, make surethatno one has any body parts inthe sweepofthe seat.
Observethe safety notes on "Airbags" and "Chil‐dren inthevehicle".
\nWARNINGRisk of accident duetothedriver's seat not being engaged
Ifthe driver's seat is not engaged, it couldmoveunexpectedly whilethevehicle is inmotion.
This could causeyoutolose control ofthevehicle.
Always make surethatthe driver's seatis engaged beforestartingthevehicle.
\nWARNINGRisk of injuryfrom adjustingthevehicle settings whilethevehicle is inmotion
You could lose control ofthevehicle inthefollowing situations:
Rifyou adjustthe driver's seat,the headrestraint,thesteering wheel orthe mirrorwhilethevehicle is in motion
Rifyoufastenyour seat belt whilethevehi‐cle is in motion
Beforestartingthe engine: adjustthedriver's seat,the headrestraint,thesteering wheel orthe mirror andfastenyour seat belt.
\nWARNINGRisk of becoming trapped ifthe seat height is adjusted carelessly
Ifyou adjustthe seat height carelessly,youorothervehicle occupants could be trappedandthereby injured.
Seats andstowing91

Children in particular could accidentallypressthe electrical seat adjustment buttonsand become trapped.
While movingthe seats, make surethathands orother body parts do notgetunderthe lever assembly ofthe seatadjustment system.
\nWARNINGRisk of injuryduetoheadrestraints which are not installed or areadjusted incorrectly
If headrestraints are not installed or areadjusted incorrectly,the headrestraints can‐not provide protection as intended.
There is an increasedrisk of injury inthehead and neck area, e.g. intheevent of anaccident or when braking.
Always drive withthe headrestraintsinstalled.
Before driving off, make sureforeveryvehicle occupantthatthe center oftheheadrestraint supportsthe back ofthehead at abouteye level.
Do not interchangethe headrestraints ofthefront andrear seats. Otherwise,you will not beabletoadjustthe height and angle ofthe headrestraints correctly.
Adjustthe headrestraintfore-and-aft position sothat it is as close as possibletothe back ofyourhead.
\nWARNINGRisk of injuryor death duetoincorrect seat position
The seat belt does not offerthe intendedlevel of protection ifyou havenot movedtheseat backresttoan almostvertical position.
When braking or intheevent of an accident,you could slide underneaththe seat belt andsustain abdominal or neck injuries,forexam‐ple.
Adjustthe seat properlybefore begin‐ningyour journey.
Always ensurethatthe seat backrest isin an almostvertical position andthatthe shoulder section ofyour seat belt isrouted acrossthe center ofyour shoul‐der.
NOTEDamagetothe seats when movingthe seats back
The seats may be damagedbyobjects whenmovingthe seats back.
When movingthe seats back,makesurethatthere are no objects inthefootwell, under or behindthe seats.
92Seats andstowing

1Seat backrestinclination
2Seat height
3Seatfore-and-aft position
Toadjustthe seatfore-and-aft position:lift lever3and slidethe seat intothedesired position.
Make surethatthe seat is engaged.
Adjusting the front seat mechanically andelectrically
\nWARNINGRisk of becoming trapped ifthe seats are adjustedbychildren
Children could become trapped iftheyadjustthe seats, particularly when unattended.
When leavingthevehicle, alwaystakethe SmartKeywithyou and lockthevehicle.
Never leavechildren unattended inthevehicle.
The seats can be adjusted whenthe ignition isswitched off.
\nWARNINGRisk of becoming trappedwhen adjustingthe seats
Whenyou adjust a seat,you orothervehicleoccupants could become trapped, e.g. ontheseat guiderail.
When adjusting a seat, make surethatno one has any body parts inthe sweepofthe seat.
Observethe safety notes on "Airbags" and "Chil‐dren inthevehicle".
\nWARNINGRisk of accident duetothedriver's seat not being engaged
Ifthe driver's seat is not engaged, it couldmoveunexpectedly whilethevehicle is inmotion.
This could causeyoutolose control ofthevehicle.
Always make surethatthe driver's seatis engaged beforestartingthevehicle.
\nWARNINGRisk of becoming trapped ifthe seat height is adjusted carelessly
Ifyou adjustthe seat height carelessly,youorothervehicle occupants could be trappedandthereby injured.
Seats andstowing93

Children in particular could accidentallypressthe electrical seat adjustment buttonsand become trapped.
While movingthe seats, make surethathands orother body parts do notgetunderthe lever assembly ofthe seatadjustment system.
\nWARNINGRisk of injuryduetoheadrestraints which are not installed or areadjusted incorrectly
If headrestraints are not installed or areadjusted incorrectly,the headrestraints can‐not provide protection as intended.
There is an increasedrisk of injury inthehead and neck area, e.g. intheevent of anaccident or when braking.
Always drive withthe headrestraintsinstalled.
Before driving off, make sureforeveryvehicle occupantthatthe center oftheheadrestraint supportsthe back ofthehead at abouteye level.
Do not interchangethe headrestraints ofthefront andrear seats. Otherwise,you will not beabletoadjustthe height and angle ofthe headrestraints correctly.
Adjustthe headrestraintfore-and-aft position sothat it is as close as possibletothe back ofyourhead.
\nWARNINGRisk of injuryor death duetoincorrect seat position
The seat belt does not offerthe intendedlevel of protection ifyou havenot movedtheseat backresttoan almostvertical position.
When braking or intheevent of an accident,you could slide underneaththe seat belt andsustain abdominal or neck injuries,forexam‐ple.
Adjustthe seat properlybefore begin‐ningyour journey.
Always ensurethatthe seat backrest isin an almostvertical position andthatthe shoulder section ofyour seat belt isrouted acrossthe center ofyour shoul‐der.
1Seat backrest inclination
2Seat height
3Seat cushion inclination
4Seatfore-and-aft position
94Seats andstowing