MERCEDES-BENZ GLS 2023 Workshop Manual

Both before and during the journey,
ensure that the status of the front
passenger airbag is correct.
If the front passenger seat is occupied, the classi-
Ncation of the person or child restraint system on
the front passenger seat takes place aser the
front passenger air bag shutoM self-test. The
PASSENGER AIR BAG indicator lamps display the status of the front passenger air bag.
Always observe the notes on the function of the PASSENGER AIR BAG indicator lamps
(  page 49).
Function of the PASSENGER AIR BAG indicator
lamps
Self-test of automatic front passenger air bag shutoM
When the vehicle is switched on, a self-test is per-
formed during which the two PASSENGER AIR
BAG ON and OFF indicator lamps light up simulta-
neously.
The status of the front passenger air bag is dis-
played via the PASSENGER AIR BAG indicator lamps aser the self-test:
= ON is lit: the front passenger air bag may
deploy during an accident.
The indicator lamp goes out aser 60 seconds.
= ON and OFF are not lit: the front passenger air
bag may deploy during an accident.
= OFF is lit: the front passenger air bag is disa-
bled. It will then not be deployed in the event of an accident.
If the PASSENGER AIR BAG ON indicator lamp is
oM, only the PASSENGER AIR BAG OFF indicator
lamp shows the status of the front passenger air
bag. The PASSENGER AIR BAG OFF indicator lamp
may be lit continuously or be oM.
If the PASSENGER AIR BAG OFF indicator lamp
and the u restraint system warning lamp light
up simultaneously, the front passenger seat may not be used. Also in this case, do not Nt a child
restraint system to the front passenger seat. Have
the automatic front passenger air bag shutoMOccupant safety49

checked and repaired immediately at a qualiNed
specialist workshop.
Status display
If the front passenger seat is occupied, ensure,
both before and during the journey, that the sta- tus of the front passenger air bag is correct for
the current situation.
Aser Ntting a rearward-facing child restraint sys-
tem to the front passenger seat: PASSENGER AIR
BAG OFF must be lit continuously.&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.
When Ntting a child restraint system to the front
passenger seat, observe the vehicle-speciNc infor-
mation (  page 66).
Depending on the child restraint system and the stature of the child, the PASSENGER AIR BAG OFF
indicator lamp may be oM. In this case, do not Nt
the rearward-facing child restraint system to the front passenger seat.
Instead, Nt the rearward-facing child restraint sys-
tem to a suitable rear passenger compartment
seat.
Aser Ntting a forward-facing child restraint sys-
tem to the front passenger seat: depending on the
child restraint system and the stature of the child, PASSENGER AIR BAG OFF may be lit continuously
or be oM. Always observe the following informa-
tion.&WARNING Risk of injury or death due to
incorrect positioning of the forward-facing
child restraint system
If you secure a child in a forward-facing child
restraint system on the front passenger seat
that is positioned too close to the cockpit, in
the event of an accident, the child could:
= come into contact with the vehicle interior
if the PASSENGER AIR BAG OFF indicator
lamp is lit, for example
= be struck by the airbag if the PASSENGER
AIR BAG OFF indicator lamp is oM.
Always move the front passenger seat as
far back as possible and fully retract the
seat cushion length adjustment. While
doing so, 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 forwards and downwards50Occupant safety

from the seat belt outlet. If necessary,adjust the seat belt outlet and the front
passenger seat accordingly.Always comply with the child restraint
system manufacturer\bs installation
instructions.
When Ntting a child restraint system to the front
passenger seat, observe the vehicle-speciNc infor-
mation (  page 66).
If a person is sitting on the front passenger seat:
PASSENGER AIR BAG OFF may be lit continuously
or be oM, depending on the person\bs stature.
A person on the front passenger seat must always observe the following information:
= If the front passenger seat is occupied by an
adult or a person with a stature corresponding
to that of an adult, the PASSENGER AIR BAG
OFF indicator lamp must be oM. This indicates
that the front passenger air bag is enabled.
If the PASSENGER AIR BAG OFF indicator
lamp is lit continuously, an adult or person
with a build corresponding to that of an adult must not use the front passenger seat.
Instead, they should use a rear passenger
compartment seat.
= If the front passenger seat is occupied by a
person of smaller stature (e.g. a teenager or
small adult), the PASSENGER AIR BAG OFF indicator lamp is either lit continuously or
remains oM, depending on the classiNcation.
- If the PASSENGER AIR BAG OFF indicator
lamp is oM: move the front passenger seat
as far back as possible, or the person of
smaller stature should use a rear
passenger compartment seat.
- If the PASSENGER AIR BAG OFF indicator
lamp is lit continuously: the person of
smaller stature should not use the front
passenger seat.&WARNING Risk of injury or death when
the PASSENGER AIR BAG OFF indicator
lamp is lit
If the PASSENGER AIR BAG OFF indicator lamp remains lit aser the self-test, the front
passenger airbag is disabled.
If the front passenger seat is occupied, always
ensure that:
= The classiNcation of the person in the front
passenger seat is correct and the front
passenger airbag is enabled or disabled in
accordance with the person in the front passenger seat.
= The person is seated properly with a cor-
rectly fastened seat belt.
= The front passenger seat has been moved
as far back as possible.
Be sure to also observe the following further rela-
ted subjects:
= Child restraint system on the front passenger
seat (  page 66)
Occupant safety51

PRE-SAFEn
system
Function of PRE-SAFE n
(anticipatory occupant
protection)
PRE-SAFE n
is able to detect certain critical driv-
ing situations and implement pre-emptive meas-
ures to protect the vehicle occupants.
PRE-SAFE n
can implement the following meas-
ures independently of each other:
= Tightening the seat belts on the driver\bs seat
and front passenger seat.
= Closing the side windows.
= Vehicles with sliding sunroof: closing the slid-
ing sunroof.
= Vehicles with memory function: moving the
front passenger seat to a more favorable seat
position.
= Vehicles with memory function in the rear
passenger compartment: moving the outer
rear passenger compartment seats to a more
favorable seat position.
= Vehicles with multicontour seat: increasing the
air pressure in the seat side bolsters of the
seat backrest.
= PRE-SAFE n
Sound: provided that the multime-
dia system is switched on, generating a brief
noise signal to stimulate the innate protective mechanism of a person\bs hearing.*NOTE Damage caused by objects in the
footwell or behind the seat
The automatic adjustment of the seat position
may result in damage to the seat and/or the object.
Stow objects in a suitable place.
Backing up the PRE-SAFE n
system measures
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
You will need to perform certain settings yourself.
If the seat belt pre-tensioning is not reduced,
move the seat backrest back slightly.
The locking mechanism releases.Function of PRE-SAFE n
PLUS (anticipatory occu-
pant protection plus)
PRE-SAFE n
PLUS can detect certain impacts, par-
ticularly an imminent rear impact, and take pre-
emptive measures to protect the vehicle occu-
pants. These measures cannot necessarily pre-
vent an imminent impact.
PRE-SAFE n
PLUS can implement the following
measures independently of each other:
= Tightening the seat belts on the driver\bs seat
and front passenger seat.
= Increasing brake pressure when the vehicle is
stationary. This brake application is canceled
automatically when the vehicle pulls away.
If an accident did not occur, the pre-emptive
measures that were taken are reversed.
System limits
The system will not initiate any action in the fol- lowing situations:
= When backing up
or
52Occupant safety

=When the vehicle is towing a trailer and there
is a risk of a rear impact
The system will not initiate any braking application
in the following situations:
= Whilst driving
or
= When entering or exiting a parking space while
using Active Parking Assist
Function of PRE-SAFE n
Impulse Side
If an imminent side impact is detected, PRE-
SAFE n
Impulse Side can pre-emptively move the
front seat vehicle occupant\bs upper body towards
the center of the vehicle. It does this by rapidly
inOating an air cushion in the outer seat side bol-
ster of the seat backrest on the side on which the impact is anticipated. This increases the distance
between the door and the vehicle occupant.
If PRE-SAFE n
Impulse Side has been deployed or
is faulty, the PRE-SAFE Impulse Side Inoperative
See Operator's Manual ( page 428) display
message appears.
Automatic measures aser an accident
Depending on the type and severity of the acci-
dent, and depending on the vehicle\bs equipment, the following measures can be implemented, forexample:
= Automatic braking (post-collision brake)
= Activating the hazard warning light system
= Triggering an automatic emergency call
(  page 326)
= Switching oM the engine
To start the vehicle again, switch the vehicle
oM and on once more (  page 176). Depend-
ing on the type and severity of the accident,
you may no longer be able to start the vehicle.
= Switching oM the fuel supply system
= Unlocking the vehicle doors
= Lowering the side windows
= Displaying the emergency guide in the multi-
media system display
= Switching on the interior lightingFunction of the post-collision brake
Depending on the accident situation, the post-col- lision brake can minimize the severity of a furthercollision or even avoid it.
If an accident is detected, the post-collision brake
can implement automatic braking. When the vehi- cle has come to a standstill, the electric parking
brake is automatically applied.
The driver can cancel automatic braking by taking
the following actions:
= Braking more strongly than automatic braking
= Fully depressing the accelerator pedal with
force
Safely transporting children in the vehicle
Always observe when children are traveling in the
vehicle
\bAlso strictly observe the safety notes for the
speciNc situation. In this way, you can recog-
nize potential risks and avoid dangers if chil- dren are traveling in the vehicle
(  page 54).Occupant safety53

Be diligent
Bear in mind that negligence when securing a
child in the child restraint system may have seri-
ous consequences. Always be diligent in securing
a child carefully before every journey.
Never allow babies and children to travel sitting
on the lap of another vehicle occupant.
To improve protection for children younger than
12 years old or under 5 s (1.50 m) in height,
Mercedes-Benz recommends you observe the fol- lowing information:
= Always secure the child in a child restraint sys-
tem suitable for this Mercedes-Benz vehicle.
= The child restraint system must be appropriate
to the age, weight and size of the child.
= The vehicle seat must be suitable for Ntting a
child restraint system.
Accident statistics show that children secured on
the rear passenger compartment seats are gener- ally safer than children secured on the front seats.For this reason, Mercedes-Benz strongly advises
that you Nt a child restraint system to a rear
passenger compartment seat.The generic term child restraint system
The generic term child restraint system is used in this Operator\bs Manual. A child restraint systemis, for example:
= a baby car seat
= a rearward-facing child seat
= a forward-facing child seat
= a child booster seat with a backrest and seat
belt guide
Mercedes-Benz recommends using a child
booster seat with a backrest.
The child restraint system must be appropriate to
the age, weight and size of the child.
Observe laws and legal requirements
Always observe the legal requirements when
using a child restraint system in the vehicle.
Observe standards for child restraint systemsAll child restraint systems must meet the followingstandards:
= U.S. Federal Motor Vehicle Safety Standards
213 and 225= Canadian Motor Vehicle Safety Standards 213
and 210.2
ConNrmation that the child restraint system com-
plies with the standards can be found on an instruction label on the child restraint system. This conNrmation can also be found in the instal-
lation instructions that are included with the child
restraint system.
Detecting risks, avoiding danger
Securing systems for child restraint systems in the vehicle
Use only the following securing systems for child restraint systems:
= the ISOFIX securing rings
= the vehicle\bs seat belt system
= the Top Tether anchorages
Fitting an ISOFIX child restraint system is prefer-
red.
Simply attaching to the securing rings on the vehi- cle can reduce the risk of Ntting the child restraint
system incorrectly.
54Occupant safety

When securing a child with the integrated seat
belt of the ISOFIX child restraint system, always comply with the permissible gross weight for the
child and child restraint system (  page 59).
A booster seat may be necessary to achieve proper seat belt positioning for children over 40 lbs (18 kg) in weight or until they reach a
height where a three-point seat belt can be instal-
led properly without a booster seat.
Mercedes-Benz recommends a suitable child
booster seat with a backrest and seat belt guide.
Advantage of a rearward-facing child restraint sys- tem
It is preferable to transport a baby or a small child in a suitable rearward-facing child restraint sys-tem. In this case, the child sits in the opposite
direction to the direction of travel and faces back-
wards.
Babies and small children have comparatively
weak neck muscles in relation to the size and weight of their head. The risk of injury to the cer-vical spine during an accident can be reduced in a
rearward-facing child restraint system.Always secure a child restraint system correctly&WARNING Risk of injury or death due to
incorrect installation of the child restraint
system
The child can then not be protected or restrained as intended.
Be sure to comply with the manufactur-
er\bs installation instructions for the child
restraint system and its correct use.Make sure that the entire base of the child restraint system always rests on
the sitting surface of the seat.Never place objects (e.g. cushions)
under or behind the child restraint sys- tem.Use child restraint systems only with the
original cover designed for them.Always replace damaged covers with
genuine covers.&WARNING Risk of injury or death due to
unsecured child restraint systems in the
vehicle
If the child restraint system is incorrectly
mounted or unsecured, it may come loose.
The child can then not be protected or
restrained as intended.
Unused child restraint systems could be Oung
around and hit vehicle occupants.
Always comply with the manufacturer\bs
installation instructions for the child
restraint system and its correct use.Always Nt child restraint systems cor-
rectly, even if they are transported in the vehicle unused.
= Always observe the child restraint system
manufacturer\bs installation and operating
instructions as well as the vehicle-speciNc
information:
- Fitting the ISOFIX child restraint system on
the right and les rear passenger compart-
ment seats (  page 59).
Occupant safety55

-Securing the child restraint system with
the seat belt on the rear passenger com-
partment seat (  page 64).
- Securing the child restraint system with
the seat belt on the front passenger seat
(  page 66). Observe the speciNc
instructions for the rearward-facing and forward-facing child restraint systems (  page 66).
If the front passenger seat is occupied,
ensure, both before and during the jour- ney, that the status of the front passengerair bag is correct for the current situation
(  page 49).
= Observe the warning labels in the vehicle inte-
rior and on the child restraint system.
= Also secure Top Tether if present.Do not modify the child restraint system&WARNING Risk of injury due to modiNca-
tions to the child restraint system
The child restraint system can no longer func-
tion properly. This poses an increased risk of
injury.
Never modify a child restraint system.Only aPx accessories which have been
specially approved for this child restraint
system by the child restraint system\bs manufacturer.
Use only child restraint systems that are in properworking condition
&WARNING Risk of injury or death caused
by the use of damaged child restraint sys- tems
Child restraint systems or their retaining sys-tems that have been subjected to stress in an
accident may not be able to perform their
intended protective function.
It may be the case that the child cannot be
properly restrained.Always immediately replace child restraint systems that have been dam-
aged or involved in an accident.Have the securing systems for the child restraint systems checked at a qualiNed
specialist workshop before installing a
child restraint system again.
Avoid direct sunlight
&WARNING Risk of burns when the child
seat is exposed to direct sunlight
If the child restraint system is exposed to
direct sunlight or heat, parts could heat up
excessively.
Children could suMer burns from these parts,
particularly the metallic parts of the child
restraint system.
Always make sure that the child restraint
system is not exposed to direct sunlight.56Occupant safety

Cover the child restraint system with ablanket, for example.If the child restraint system has been
exposed to direct sunlight, allow it to
cool before securing a child into it.Never leave children unattended in the vehicle.
Observe when stopping or parking
&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.Overview of suitable seats in the vehicle for instal-
ling a child restraint system
Les/right rear seat
Second row of seats (les and right seat), prefer-
red securing system:
®ISOFIX child seat anchor¯Also secure Top Tether if present
(  page 62).
Third row of seats, preferred securing system:
®ISOFIX child seat anchor¯Also secure Top Tether if present
(  page 62).
Preferred securing system:
®ISOFIX child seat anchor
Les/right rear seat (second and third seat rows)
!

Front passenger seat
Securing system:vVehicle seat belt
Please note: = If the front passenger seat is occupied,
ensure, both before and during the journey, that the status of the front passenger air bagis correct for the current situation
(  page 49).
= Notes on the automatic front passenger air
bag deactivation system (  page 48).
Center rear seat on the second row of seats
Securing system:
vVehicle seat belt¯Also secure Top Tether if present
(  page 62).Activating or deactivating the special seat belt
retractor of the seat belt&WARNING Risk of injury or death if a seat
belt is unfastened while the vehicle is in
motion
If the seat belt is released while the vehicle is
in motion, the special seat belt retractor is
deactivated and the child restraint system is no longer correctly secured. The seat belt is
drawn in slightly by the inertia reel and cannot
be immediately closed again.
Stop the vehicle immediately in accord-
ance with the traPc conditions.Activate the special seat belt retractor
again and correctly secure the child
restraint system.
When enabled, the special seat belt retractor
ensures that the seat belts of the front passenger seat and rear seats do not slacken once the childrestraint system is secured.
The seat belts on the following seats are equipped
with a special seat belt retractor:
= Front passenger seat
= Rear passenger compartment seats
Installing a child restraint systemWhen installing a child restraint system, always observe the manufacturer\bs installation
and operating instructions as well as the infor-
mation in this Operator\bs Manual.Pull the seat belt smoothly from the seat belt outlet.Engage the seat belt tongue in the seat beltbuckle.
Activating the special seat belt retractor
Pull the seat belt out fully and let the inertia
reel retract it again.
When the special seat belt retractor is activa-
ted, you will hear a ratcheting sound.Push the child restraint system down until the seat belt sits tightly.58Occupant safety