MERCEDES-BENZ GLS 2023 Repair Manual

Deactivating the special seat belt retractorPress the release button of the seat beltbuckle.Hold the seat belt tongue and guide back to
the seat belt outlet.
Installing a LATCH-type (ISOFIX) child restraint
system on the les and right rear seats
Installing an ISOFIX child restraint system on the
les and right rear seats
&WARNING Risk of accident if the rear
bench seat, rear seat and seat backrest
are not engaged
The rear bench seat, rear seat and seat back-
rest may fold forwards, even when you are
driving.
= As a result, the vehicle occupant will be
pushed into the seat belt with increased
force. The seat belt will not be able to pro-
tect as intended and could cause addi-
tional injury.
= Objects or loads in the trunk or cargo
compartment will not be restrained by the
seat backrest.Make sure that the rear bench seat, the rear seat and the seat backrest are engaged before every trip.If the seat backrest is not engaged and locked inplace, this will be shown on the display on theinstrument display (folding the rear seat back
electrically) or the red lock veriNcation indicator
will be visible (folding the rear seat back mechani-
cally).&WARNING Risk of injury or death if the
permissible gross mass of the child and
child restraint system together is excee-
ded.
Too much load may be placed on the LATCH- type (ISOFIX) child restraint system and the
child may not be restrained correctly in the
event of an accident, for example.
If the child and the child restraint system together weigh more than the permissi-ble gross mass of 73 lb (33 kg ), only use
a LATCH-type (ISOFIX) child restraint
system with which the child is secured
with the vehicle seat belt.Also secure the child restraint system
with the Top Tether belt, if available.Always comply with the speciNcations regarding
the weight of the child restraint system:
= In the manufacturer\bs installation and operat-
ing instructions for the child restraint system used
= On a label on the child restraint system, if
present
Regularly check that the weight of the child and child restraint system still complies with the per-missible gross weight.
When installing a child restraint system, observe
the following:
sAlways ensure that the installation area and
the seats are suitable for attaching a child
restraint system.Occupant safety59

sAlways comply with the manufacturer\bs
installation and operating instructions for the
child restraint system used.sMake sure that the child\bs feet do not touch the front seat. If necessary, move the front
seat slightly forwards.
® When installing an ISOFIX child restraint sys-
tem, also observe the following:
sWhen using a baby car seat in weight group
0/0\f and a rearward-facing child restraint
system in Weight group I on a rear seat:
adjust the front seat so that the seat does
not touch the child restraint system.sWhen using a forward-facing child restraint
system in Weight group I: remove the head
restraint from the respective seat, if possible.
In addition, the backrest on the child
restraint system must lie as Oat as possible
against the backrest on the vehicle seat.
Aser the child restraint system has been
removed, replace the head restraint immedi-
ately and adjust all head restraints correctly.sWhen using a child restraint system on a seat on the third row of seats: adjust the
front seat so that it does not touch the child
restraint system and move the seat backrest
on the front seat into an upright position if necessary.sIf the head restraint of the child seat cannot
be fully extended when it is installed in the vehicle, this will result in restrictions on themaximum size setting for child restraint sys-tems in weight group II or III.
Contact with the roof when the head restraint is fully extended and locked in place
will not result in any restrictions on use.sEnsure that the child restraint system is not
subjected to strain between the roof and the
seat cushion and/or installed facing the wrong direction. Where possible, adjust theseat cushion inclination accordingly.sEnsure that the child restraint system is not
subjected to strain by the head restraint.
Adjust the head restraints as appropriate.Before every journey, make sure that the ISO- FIX child restraint system is engaged in both
mounting brackets in the vehicle.*NOTE Damage to the seat belt for the cen-
ter seat during installation of the child
restraint systemMake sure that the seat belt is not trap-
ped.60Occupant safety

Vehicles with individual rear seats:1ISOFIX mounting bracketRemove and stow away covers 1 for the
mounting brackets in the vehicle.Attach the ISOFIX child restraint system to both mounting brackets in the vehicle.Aser removing the child restraint system, reat-
tach covers 1.Vehicles with rear bench seat:Mercedes-Maybach vehicles with reclining
rear seats: before an ISOFIX or i-Size child
restraint system is installed, tilt the backrest
on the reclining rear seat back slightly.Remove upholstered lining 1.Vehicles without reclining rear seats: fold
upholstered lining 1 upwards.Turn the support on the rear of the uphol-
stered lining 1 90°.
Upholstered lining 1 will remain folded
upwards.Attach the ISOFIX child restraint system to both mounting brackets 2 in the vehicle.Mercedes-Maybach vehicles with reclining
rear seats: return the reclining rear seat back-
rest to an upright position.
The reclining rear seat backrest must be in contact with the child restraint system.Occupant safety61

Vehicles with a third row of seats:Attach the ISOFIX child restraint system toboth ISOFIX mounting brackets 1.Fastening a Top Tether&WARNING Risk of injury or death if the
rear seat backrests are not locked aser
Top Tether belts are installed
The rear seat backrests may fold forwards
when you are driving.
As a result, child restraint systems will no lon-
ger be able to perform their intended protec-
tive function. This may also cause additional injuries.
Always lock rear seat backrests aser
installing Top Tether belts.Observe the lock veriNcation indicator.If the seat backrest is not engaged and locked in
place, this will be shown on the display on theInstrument Display (folding the rear seat back
electrically) or the red lock veriNcation indicator
will be visible (folding the rear seat back mechani-
cally).¯If the child restraint system is equipped
with a Top Tether belt:The risk of injury may be reduced by Top
Tether. The Top Tether belt enables an
additional connection between the child
restraint system attached with LATCH-type
(ISOFIX) (les and right rear seats) or the
seat belt (all rear seats) and the vehicle.
The Top Tether anchorages for the second row of
seats are located on the rear side of the seat backrest. For the third row of seats, use the Top
Tether anchorage on the rear side of the seat
backrest.
62Occupant safety

Second row of seats
If necessary, slide head restraint 1 upwards
(  page 110).Install the LATCH-type (ISOFIX) or belt-
secured child restraint system with Top Tether. In doing so, comply with the child restraint
system manufacturer\bs installation instruc-
tions.Guide Top Tether belt 5 under head restraint
1 between the two head restraint bars.If cargo compartment cover 3 is installed,
guide Top Tether belt 5 downwards between
cargo compartment cover 3 and seat back-
rest 2.Hook Top Tether hook 6 of Top Tether belt
5 into Top Tether anchorage 4 without
twisting.Tension Top Tether belt 5. In doing so, com-
ply with the child restraint system manufactur-
er\bs installation instructions.If necessary, slide head restraint 1 down-
wards (  page 110). Make sure that you do
not interfere with the correct routing of Top
Tether belt 5.Occupant safety63

Mercedes!

Make sure that the rear bench seat, therear seat and the seat backrest are engaged before every trip.If the seat backrest is not engaged and locked inplace, this will be shown on the display on theinstrument display (folding the rear seat back
electrically) or the red lock veriNcation indicator
will be visible (folding the rear seat back mechani-
cally).
When installing a belt-secured child restraint sys-
tem, observe the following:
sAlways comply with the manufacturer\bs
installation and operating instructions for the
child restraint system used.sAlso secure Top Tether if present
(  page 62).sWhen using a baby car seat in weight group
0/0\f and a rearward-facing child restraint
system in weight group 1 on a rear seat: adjust the front seat so that the seat does
not touch the child restraint system.sWhen using a forward-facing child restraint system in weight group 1 : remove the head
restraint from the respective seat, if possible.
Aser the child restraint system has been
removed, replace the head restraint immedi-
ately and adjust all head restraints correctly.sThe backrest of a forward-facing child
restraint system must, as far as possible, be
resting on the seat backrest of the rear seat.sIf the head restraint of the child seat cannot
be fully extended when it is installed in the vehicle, this will result in restrictions on themaximum size setting for child restraint sys-tems in weight group 2 or 3.
Contact with the roof when the head restraint is fully extended and locked in place
will not result in any restrictions on use.sThe child restraint system must not be put under strain between the roof and the seat
cushion and/or be installed facing the wrong
direction. Where possible, adjust the seat
cushion inclination accordingly.sThe child restraint system must not be put under strain by the head restraint. Adjust thehead restraints as appropriate.sMake sure that the child\bs feet do not touch
the front seat. If necessary, move the front seat slightly forwards.
The seat belts on the following seats are equipped
with a child seat safety feature:
= Front passenger seat
= Rear seats
When enabled, the child seat safety feature
ensures that the seat belts of the front passenger
seat and rear seats do not slacken once the child restraint system is secured (  page 58).
Install the child restraint system.
The entire base of the child restraint system must always rest on the seat surface of the
rear seat.Always make sure that the shoulder belt strap is correctly routed from the seat belt outlet ofOccupant safety65

the vehicle to the shoulder belt guide on the
child restraint system.
The shoulder belt strap must be routed
forward from the seat belt outlet.
Notes on rearward-facing and forward-facing child
restraint systems on the front passenger seat
&WARNING Risk of injury or fatal injury
when using a rearward-facing child restraint system while the co-driver airbag
is enabled
If you secure a child in a rearward-facing child
restraint system on the co-driver seat and the
PASSENGER AIR BAG OFF indicator lamp is
oM, the co-driver airbag can deploy in the
event of an accident.
The child could be struck by the airbag.
Always ensure that the co-driver airbag is
disabled. The PASSENGER AIR BAG OFF
indicator lamp must be lit.NEVER use a rearward-facing child restraint system on a seat with an ENA-BLED FRONT AIRBAG; DEATH or SERI-OUS INJURY to the CHILD can occur.
Observe the speciNc instructions for the rear-
ward-facing and forward-facing child restraint sys-
tems (  page 66).
Always observe the status of the front passenger air bag on the PASSENGER AIR BAG OFF indicator
lamp:
= When using a rearward-facing child restraint
system on the front passenger seat, the front
passenger air bag must always be deactivated. This is the case only if the PASSENGER AIR
BAG OFF indicator lamp is lit continuously
(  page 49).
= If the PASSENGER AIR BAG OFF indicator
lamp is oM, the front passenger air bag is acti-
vated. The front passenger air bag may deploy
during an accident.
Securing the child restraint system with the seat belt on the front passenger seat
When installing a belt-secured child restraint sys-
tem on the front passenger seat, always observe
the following:sObserve the notes on rearward-facing and forward-facing child restraint systems on thefront passenger seat (  page 66).sObserve the child restraint system manufac-
turer\bs installation and operating instructions.sWhen using a forward-facing child restraint
system in weight group 1: remove the head restraint from the respective seat, if possible.
Aser the child restraint system has been
removed, replace the head restraint immedi-
ately and adjust all head restraints correctly.sThe backrest of the forward-facing child
restraint system must, as far as possible, be
resting on the seat backrest of the front passenger seat.sIf the head restraint of the child seat cannot
be fully extended when it is installed in the vehicle, this will result in restrictions on the66Occupant safety

maximum size setting for child restraint sys-tems in weight group 2 or 3.
Contact with the roof when the head restraint is fully extended and locked in place
will not result in any restrictions on use.sThe child restraint system must not be put under strain between the roof and the seat
cushion and/or be installed facing the wrong
direction.sThe child restraint system must not be put under strain by the head restraint. Adjust the head restraints as appropriate.sNever place objects (e.g. cushions) under or
behind the child restraint system.
The seat belt on the front passenger side is equip-
ped with a child seat safety feature.
When enabled, the child seat safety feature
ensures that the seat belt does not slacken once the child seat is secured (  page 58).
&WARNING Risk of injury or death due to
objects between the seat surface and the
child restraint system
Objects between the seat surface and the child restraint system could aMect the function
of the automatic front passenger airbag shut-
oM.
Do not place any objects between the
seat surface and the child restraint sys- tem.Always make sure that the child restraint
system is correctly installed.Set the front passenger seat as far back as possible and move the seat into the highest
position if possible.Fully retract the seat cushion length adjust- ment.Adjust the seat cushion inclination such thatthe front edge of the seat cushion is in the
highest position and the rear edge of the seat cushion is in the lowest position.Set the seat backrest to the most verticalposition possible.Install the child restraint system.The entire base of the child restraint system must always rest on the seat surface of the
front passenger seat.Always make sure that the shoulder belt strap is correctly routed from the seat belt outlet of
the vehicle to the shoulder belt guide on the
child restraint system.
The shoulder belt strap must be routed for-
wards and downwards from the seat belt out-
let.If necessary, adjust the seat belt outlet and
the front passenger seat accordingly.Occupant safety67

Child-proof locks
Activating/deactivating the child safety lock for
the rear passenger compartment doors
&WARNING Risk of accident and injury due
to children les unattended in the vehicle
If children are les unsupervised in the vehicle,
they could, in particular:
= open doors, thereby endangering other
persons or road users.
= get out and be struck by oncoming traPc.
= operate vehicle equipment and become
trapped, for example.
In addition, the children could also set the
vehicle in motion, for example by:
= releasing the parking brake.
= changing the transmission position.
= starting the vehicle.
Never leave children unattended in the
vehicle.When leaving the vehicle, always take the SmartKey with you and lock the vehicle.Keep the vehicle SmartKey out of reach
of children.&WARNING Risk of fatal injury due to expo-
sure to extreme heat or cold in the vehicle
If persons, particularly children, are subjected
to prolonged exposure to intense heat or cold,
there is a risk of severe injury or even death.
Never leave persons, particularly chil-
dren, unattended in the vehicle.&WARNING Risk of accident and injury due
to children les unattended in the vehicle
If children are traveling in the vehicle, they
could, in particular:
= Open doors, thereby endangering other
persons or road users.
= Get out and be struck by oncoming traPc.
= Operate vehicle equipment and become
trapped, for example.
Always activate the installed child safety
locks if children are traveling in the vehi-
cle.Never leave children unattended in the vehicle.When leaving the vehicle, always take the SmartKey with you and lock the vehicle.There are child safety locks for the rear passenger
compartment doors and the rear passenger com-
partment side windows.
The child safety lock on the rear passenger com-
partment doors secures each door separately.
The doors can no longer be opened from the inside.
68Occupant safety