belt MERCEDES-BENZ G-CLASS 2018 Owner's Guide
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Page 53 of 294

be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat belt retractor and secure the
child restraint system properly.
All seat belts in the vehicle, except the driver's
seat belt, are equipped with a special seat belt
retractor. When activated, the special seat belt
retractor ensures that the seat belt cannot
slacken once the child seat is secured.
Installing a child restraint system:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPull the seat belt smoothly out of the belt sash
guide.
XEngage seat belt tongue in belt buckle.
Activating the special seat belt retractor:
XPull the seat belt out fully and let the inertia
reel retract it again.
While the seat belt is retracting, you should
hear a ratcheting sound. The special seat belt
retractor is enabled.
XPush the child restraint system down so that
the seat belt is tight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat belt retractor:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPress the release button of the seat belt
buckle and route the seat belt tongue back
towards the belt sash guide.
The special seat belt retractor is deactivated.
Child restraint system
The use of seat belts and child restraint systems
is required by law in:
Rall 50 states
Rthe U.S. territories
Rthe District of Columbia
Rall Canadian provinces
You can obtain further information about the
correct child restraint system from any author-
ized Mercedes-Benz Center.
GWARNING
If the child restraint system is installed incor-
rectly on a suitable seat, it cannot protect as
intended. The child cannot then be restrained
in the event of an accident, heavy braking or
sudden changes of direction. There is an
increased risk of injury, possibly even fatal.
Make sure that you observe the child restraint
system manufacturer's installation instruc-
tions and the notes on use. Please ensure,
that the base of the child restraint system is
always resting completely on the seat cush-
ion. Never place objects, e.g. cushions, under or behind the child restraint system. Only use
child restraint systems with the original cover
designed for them. Only replace damaged
covers with genuine covers.
GWARNING
If the child restraint system is installed incor-
rectly or is not secured, it can come loose in
the event of an accident, heavy braking or a
sudden change in direction. The child
restraint system could be thrown about, strik-
ing vehicle occupants. There is an increased
risk of injury, possibly even fatal.
Always install child restraint systems prop-
erly, even if they are not being used. Make
sure that you observe the child restraint sys-
tem manufacturer's installation instructions.
You will find further information on stowing
objects, luggage or loads under "Loading guide-
lines" (
Ypage 209).
GWARNING
Child restraint systems or their securing sys-
tems which have been damaged or subjected
to a load in an accident can no longer protect
as intended. The child cannot then be
restrained in the event of an accident, heavy
braking or sudden changes of direction. There is an increased risk of injury, possibly even
fatal.
Replace child restraint systems which have
been damaged or subjected to a load in an
accident as soon as possible. Have the secur-
Children in the vehicle51
Safety
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ing systems on the child restraint system
checked at a qualified specialist workshop,
before you install a child restraint system
again.
The securing systems of child restraint systems
are:
Rthe seat belt system
Rthe LATCH-type (ISOFIX) securing rings
Rthe Top Tether anchorages
iIf it is absolutely necessary to install a child
restraint system on the front-passenger seat,
always observe the information on "Child
restraint systems on the front-passenger
seat" (
Ypage 55). There you will also find
information on deactivating the front-
passenger front air bag.
All child restraint systems must meet the fol-
lowing standards:
RU.S. Federal Motor Vehicle Safety Standards
213 and 225
RCanadian Motor Vehicle Safety Standards
213 and 210.2
Confirmation that the child restraint system cor-
responds to the standards can be found on an
instruction label on the child restraint system.
This confirmation can also be found in the instal-
lation instructions that are included with the
child restraint system.
Observe the warning labels in the vehicle inte-
rior and on the child restraint system.
LATCH-type (ISOFIX) child seat secur-
ing system
GWARNING
LATCH-type (ISOFIX) child restraint systems
do not offer sufficient protection for children
whose weight combined with the child
restraint system is greater than 65 lbs (29 kg) and who are secured using the safety belt
integrated in the child restraint system. In the
event of an accident, a child might not be
restrained correctly. This poses an increased
risk of injury or even fatal injury.
If the child and the child restraint system
together weigh more than 65 lbs (29 kg), only
use LATCH-type (ISOFIX) child restraint sys-
tems with which the child is also secured with
the vehicle seat belt. Also secure the child
restraint system with the Top Tether belt, if
available.
Always comply with the manufacturer's instal-
lation and operating instructions for the child
restraint system used.
Before every trip, make sure that the LATCH-
type (ISOFIX) child restraint system is engaged
correctly in both LATCH-type (ISOFIX) securing
rings
!When installing the child restraint system,
make sure that the seat belt for the middle
seat does not get trapped. The seat belt could
otherwise be damaged.
XInstall the LATCH-type (ISOFIX) child restraint system on both LATCH-type (ISOFIX) securing
rings :.
ISOFIX is a standardized securing system for
specially designed child restraint systems on
the rear seats. LATCH-type (ISOFIX) securing
rings for two LATCH-type (ISOFIX) child restraint
systems are installed on the left and right of the
rear seats.
Non-LATCH-type (ISOFIX) child seats may also
be used and can be installed using the vehicle's
seat belt system. Install the child seat according
to the manufacturer's instructions.
Top Tether
Introduction
Top Tether provides an additional connection
between the child restraint system secured with
a LATCH-type (ISOFIX) system and the vehicle.
This helps reduce the risk of injury even further.
52Children in the vehicle
Safety
Page 55 of 294

If the child restraint system is equipped with a
Top Tether belt, this should always be used.
Important safety notes
GWARNING
If the rear seat backrests are not locked, they
could fold forwards in the event of an acci-
dent, heavy braking or sudden changes of
direction. As a result, child restraint systems
cannot perform their intended protective
function. Rear seat backrests that are not
locked can also cause additional injuries, e.g.
in the event of an accident. This poses an
increased risk of injury or even fatal injury.
Always lock rear seat backrests after instal-
ling a Top Tether belt. Adjust the rear seat
backrests so that they are in an upright posi-
tion.
Make sure that the backrest in the rear com-
partment engages fully. To do so, pull firmly on
the seat backrest.
Top Tether anchorages
Top Tether anchorages ;are on the cargo
compartment floor.
XRemove cargo compartment cover
(Ypage 214).
XMove the head restraint up.
XInstall the LATCH-type (ISOFIX) child restraint system with Top Tether. Always comply with
the child restraint system manufacturer's
installation instructions when doing so.
XRoute Top Tether belt =under the head
restraint between the two head restraint bars.
XHook Top Tether hook :of Top Tether belt
= into Top Tether anchorage ;.
Make sure that Top Tether belt =is not twis-
ted.
XTension Top Tether belt =. Always comply
with the child restraint system manufactur-
er's installation instructions when doing so.
XMove head restraint back down again slightly if necessary (Ypage 77). Make sure that
you do not interfere with the correct routing of
Top Tether belt =.
BabySmart™ air bag deactivation sys-
tem
GWARNING
Electronic devices on the front-passenger
seat can affect the function of the Baby-
Smart™ air bag deactivation system, for
example:
RLaptop
RMobile phone
RTransponder cards such as ski passes or
access passes
The front-passenger air bag could deploy acci-
dentally or not function as intended during an
Children in the vehicle53
Safety
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accident. This poses an increased risk of
injury or even fatal injury.
Do not place any of the devices mentioned
above or similar devices on the front-
passenger seat. Be aware of the status of the
front-passenger front air bag both before and
during the journey.
The BabySmart™ air bag deactivation system's
sensor system in the front-passenger seat
detects whether a special Mercedes-Benz child
restraint system with a transponder for the
BabySmart™ air bag deactivation system has
been installed. In this case, the PASSENGER AIR
BAG OFF indicator lamp lights up and remains
lit. The front-passenger front air bag is deacti-
vated.
When the SmartKey is removed from the ignition
lock or is in position g, the PASSENGER AIR
BAG OFF indicator lamp is not lit.
iIf the front-passenger front air bag is deac-
tivated by the BabySmart™ air bag deactiva-
tion system, the following remain enabled on
the front-passenger side:
Rthe side impact air bag
Rthe pelvis air bag
Rthe window curtain air bag
Rthe Emergency Tensioning Device
GWARNING
If you secure a child in a child restraint system on the front-passenger seat and the
PASSENGER AIR BAG OFF indicator lamp is
off, the front-passenger front air bag can
deploy in the event of an accident. The child
could be struck by the air bag. This poses an
increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been deactivated. The PASSENGER
AIR BAG OFF indicator lamp must be lit.
NEVER use a rearward-facing child restraint
on a seat protected by an ACTIVE FRONT AIR
BAG in front of it; DEATH or SERIOUS INJURY
to the child can occur.
GWARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is
deactivated. It will not be deployed in the
event of an accident and cannot perform its
intended protective function. A person in the
front-passenger seat could then, for example, come into contact with the vehicle's interior,
especially if the person is sitting too close to
the dashboard. This poses an increased risk of
injury or even fatal injury.
In this case the front-passenger seat may not
be used. You may only transport a child on the
front-passenger seat if they are seated in a
suitable rearward or forward-facing child
restraint system. Always observe the child
restraint system manufacturer's installation
instructions.
GWARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too close to the dashboard, in the event of an
accident, the child could:
Rcome into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
Rbe struck by the air bag if the PASSENGER
AIR BAG OFF indicator lamp is off
This poses an increased risk of injury or even fatal injury.
Move the front-passenger seat as far back as
possible. Always make sure that the shoulder belt strap is correctly routed from the vehicle
belt sash guide to the shoulder belt guide on
the child restraint system. The shoulder belt
strap must be routed forwards and down-
wards from the belt sash guide. If necessary,
adjust the belt sash guide and the front-
passenger seat accordingly. Always observe
the information about suitable positioning of
the child restraint system in this Operator's
Manual as well as the child restraint system
manufacturer's installation instructions.
54Children in the vehicle
Safety
Page 57 of 294

PASSENGER AIR BAG OFF indicator lamp:
shows you whether the front-passenger front air
bag is deactivated.
XTurn the SmartKey to position 1or2 in the
ignition lock.
The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF indicator lamp
must light up for approximately six seconds.
If, after the system self-test, the
PASSENGER AIR BAG OFF indicator lamp:
Ris lit: the front-passenger front air bag is
deactivated. It will then not be deployed in the event of an accident.
Ris not lit , the sensor system did not detect a
child restraint system with transponder for
the BabySmart™ air bag deactivation system.
If, in the event of an accident, all deployment
criteria are met, the front-passenger front air
bag is deployed.
Child restraint system on the front-
passenger seat
General notes
Accident statistics show that children secured
in the rear seats are safer than children secured
in the front-passenger seat. For this reason,
Mercedes-Benz strongly advises that you install
the child restraint system on a rear seat.
If it is absolutely necessary to install a child
restraint system on the front-passenger seat,
always observe the information on the "Baby-
Smart™ air bag deactivation system"
(
Ypage 53). You can thus avoid the risks that could arise as
a result of:
Ra child restraint system that is not detected
by the BabySmart™ air bag deactivation sys-
tem sensor system
Rthe unintentional deactivation of the front-
passenger front air bag
Rthe unsuitable positioning of the child
restraint system, e.g. too close to the dash-
board
Rearward-facing child restraint system
If it is absolutely necessary to install a rearward-
facing child restraint system on the front-
passenger seat, always make sure that the
front-passenger front air bag is deactivated.
Only if the PASSENGER AIR BAG OFF indicator
lamp is permanently lit (
Ypage 39) is the front-
passenger front air bag deactivated.
Always observe the child restraint system man-
ufacturer's installation and operating instruc-
tions.
Forward-facing child restraint system
If it is absolutely necessary to install a forward-
facing child restraint system on the front-
passenger seat, always move the front-
passenger seat as far back as possible. The
entire base of the child restraint system must
always rest on the seat cushion of the front-
passenger seat. The backrest of the child
restraint system must lie as flat as possible
against the backrest of the front-passenger
seat. The child restraint system must not touch
the roof or be subjected to a load by the head
restraint. Adjust the angle of the seat backrest
and the head restraint position accordingly.
Always make sure that the shoulder belt strap is
correctly routed from the vehicle belt sash guide
to the shoulder belt guide on the child restraint system. The shoulder belt strap must be routed
forward and down from the vehicle belt sash
guide. If necessary, adjust the belt sash guide
and the front-passenger seat accordingly.
Always observe the child restraint system man-
ufacturer's installation and operating instruc-
tions.
Children in the vehicle55
Safety
Z
Page 76 of 294

Correct driver's seat position
:Steering wheel
;Seat belts
=Backrest
XObserve the safety guidelines on seat adjust-
ment (Ypage 74).
XMake sure that seat=is adjusted properly.
Electrical seat adjustment (
Ypage 76)
When adjusting the seat, make sure that:
Ryou are as far away from the driver's air bag as
possible
Ryou are sitting in a normal upright position
Ryou can fasten the seat belt properly
Ryou have moved the backrest to an almost
vertical position
Ryou have set the seat cushion angle so that
your thighs are gently supported
Ryou can depress the pedals properly
XCheck whether the head restraint is adjusted
properly (Ypage 76).
When doing so, make sure that you have
adjusted the head restraint so that the back of
your head is supported at eye level by the
center of the head restraint.
XObserve the safety guidelines on steering
wheel adjustment (Ypage 74).
XMake sure that steering wheel :is adjusted
properly.
Adjusting the steering wheel electrically
(
Ypage 80). When adjusting the steering wheel, make sure
that:
Ryou can hold the steering wheel with your
arms slightly bent
Ryou can move your legs freely
Ryou can see all the displays in the instrument
cluster clearly
XObserve the safety guidelines for seat belts
(Ypage 40).
XCheck whether you hav
e fastened seat
belt ;properly (Ypage 41).
The seat belt should:
Rfit snugly across your body
Rbe routed across the middle of your shoulder
Rbe routed across your hips in the pelvic area
XBefore starting off, adjust the rear-view mirror
and the exterior mirrors in such a way that you
have a good view of road and traffic condi-
tions (
Ypage 82).
XVehicles with a memory function: save the
seat, steering wheel and exterior mirror set-
tings with the memory function (
Ypage 84).
Seats
Important safety notes
GWARNING
Children could become trapped if they adjust
the seats, particularly when unattended.
There is a risk of injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
The seats can still be adjusted when there is no
SmartKey in the ignition lock.
GWARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
Observe the safety notes on "Air bags"
(
Ypage 44) and "Children in the vehicle"
(Ypage 50).
74Seats
Seats, steering wheel and mirrors
Page 77 of 294

GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt before starting the engine.
GWARNING
If the head restraints are not installed or not
adjusted correctly, they cannot provide pro-
tection as intended. There is an increased risk
of injury in the head and neck area, e.g. in the event of an accident or when braking.
Always drive with the head restraints instal-
led. Before driving off, make sure for every
vehicle occupant that the center of the head
restraint supports the back of the head at
about eye level.
Make sure that you do not rotate the head
restraints of the front and rear seats when
adjusting the head restraints. Otherwise, you
cannot adjust the height and angle of the head
restraints correctly.
Adjust the head restraint so that it is as close as
possible to your head.
GWARNING
If you adjust the seat height carelessly, you or
other vehicle occupants could be trapped and
thereby injured. Children in particular could
accidentally press the electrical seat adjust-
ment buttons and become trapped. There is a
risk of injury.
While moving the seats, make sure that your
hands or other body parts do not get under the
lever assembly of the seat adjustment sys-
tem.
GWARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the seat guide rail. There is a risk of injury.
Make sure when adjusting a seat that no one
has any body parts in the sweep of the seat.
!To avoid damage to the seats and the seat
heating, observe the following information:
Rkeep liquids from spilling on the seats. If
liquid is spilled on the seats, dry them as
soon as possible.
Rif the seat covers are damp or wet, do not
switch on the seat heating. The seat heat-
ing should also not be used to dry the seats.
Rclean the seat covers as recommended;
see "Interior care".
Rdo not transport heavy loads on the seats.
Do not place sharp objects on the seat
cushions, e.g. knives, nails or tools. The
seats should only be occupied by passen-
gers, if possible.
Rwhen the seat heating is in operation, do
not cover the seats with insulating materi-
als, e.g. blankets, coats, bags, seat covers,
child seats or booster seats.
!Make sure that there are no objects in the
footwell under or behind the seats when mov-
ing the seats back. There is a risk that the
seats and/or the objects could be damaged.
!When the rear bench seat is folded for-
wards, the front seats cannot be moved to
their rearmost position. You could otherwise
damage the seats and the rear bench seat.
!Make sure that the sun visor is folded up
before adjusting the backrest and head
restraint height. The head restraint and sun
visor could otherwise collide when the head
restraint is fully extended.
iIf the front door is open, the seats can be
adjusted for up to 30 minutes after the igni-
tion has been switched off.
iThe rear-compartment head restraints can
be removed (Ypage 77).
For more information, contact a qualified spe-
cialist workshop.
iYou can find further information about
enlarging the cargo compartment (folding the
rear bench seat forwards) on (
Ypage 213).
Seats75
Seats, steering wheel and mirrors
Z
Page 81 of 294

iThe system automatically switches from
level 3to level 2after approximately eight
minutes.
The system automatically switches down
from level 2to level 1after approximately ten
minutes.
The system automatically switches off
approximately 35 minutes after it is set to
level 1.
Switching the seat ventilation on/off
Switching on/off
Seat ventilation is only available for the front
seats.
The three blue indicator lamps in the buttons
indicate the ventilation level you have selected.
XMake sure that the SmartKey is in position 2
in the ignition lock (Ypage 105).
XTo switch on: press button:repeatedly
until the desired ventilation level is set.
iIf you open the side windows and the sliding
sunroof using the SmartKey (Ypage 70), the
driver's seat ventilation automatically
switches to the highest level.
XTo switch off: press button:repeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
ventilation may switch off.
Problems with the seat heating/seat ventilation
ProblemPossible causes/consequences and MSolutions
The seat heating or seat
ventilation has switched
off prematurely or can-
not be switched on.The on-board voltage is too low because too many electrical consum-
ers are switched on.
XSwitch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating or seat
ventilation can be switched back on manually.
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint, steer-ing wheel and mirror and fasten your seat belt
before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
Steering wheel79
Seats, steering wheel and mirrors
Z
Page 110 of 294

Deactivating/activating theECO start/
stop function
XTo activate :press butto n:.
Indicator lamp ;on butto n: and th eè
EC Osymbol in th emultifunction display go
out .
Selecting drive program Sor Min Mercedes -
AM Gvehicles automatically deactivates th e
EC Ostart/sto pfunction .
XTo activate :press butto n:.
Indicator lamp ;lights up.
Mercedes-AMG vehicles :if drive program S
or Mis active ,th eautomatic transmissio n
switches to drive program C.
If all condition sfo rautomatic engin eswitch -
of f (
Ypage 108) are fulfilled, th eè sym-
bol is shown in green in th emultifunction dis -
play.
If th econdition sfo rautomatic engin eswitch -
of fare no tall fulfille d (
Ypage 108), th eè
EC Osymbol is lit yellow. If this is th ecase, th e
EC Ostart/sto pfunction is no tavailable .
iIf indicator lamp ;is off, th eEC Ostart /
stop function has bee ndeactivated manually
or as th eresult of amalfunction .The engin e
will then no tbe switched of fautomatically
when th evehicle stops .
Automatic engin eswitch-off
If th evehicle is brake dto astandstill wit hth e
transmissio nin h ori ,th eEC Ostart/sto p
function switches of fth eengin eautomatically. The EC
Ostart/sto pfunction is operational and
th eè ECOsymbol is shown in green in th e
multifunction display, if:
Rth eindicator lamp in th eè ECObutto nis
lit green
Rth etransfe rcas eis in th eHIG HRANGE on-
road position
Rth evehicle is stationary
Rth eoutsid etemperature and th eatmospheri c
air pressure is within th erange that is suitable
fo rth esyste m
Rtheengin eis at normal operatin gtemperature
Rth eset temperature fo rth evehicle interio r
has bee nreached
Rth ebattery is sufficientl ycharged
Rth esyste mdetects that th ewindshield is no t
fogge dup when th eair-conditionin gsystem is
switched on
Rth ehoo dis close d
Rthedriver's doo ris close dand th edriver's
seat belt is fastene d
If th econdition sfo rautomatic engin eswitch-off
are no tall fulfilled, th eè ECOsymbol is
shown in yellow.
iIf you shift th etransmissio nfrom Rto D, the
EC Ostart/sto pfunction is avai lable again
once th eè ECOsymbol reappears in
green in th emultifunction display.
iThe engin ecan be automatically switched
of fan unlimite dnumber of times .
iYou can still activat eth eHOLD function
when th evehicle is stationary, eve nif th e
engin ehas bee nswitched of fautomatically. It
is then no tnecessary to continue applyin gth e
brake sdurin gth eautomatic stop phase.
Whe nyou depress th eaccelerator pedal, th e
engin estart sautomatically and th ebraking
effect of th eHOLD function is deactivated.
Depress th eaccelerator peda lcarefully, as
th eengin emus tbe started first .
iDuringautomatic engin eswitch-off ,th ecli-
mat econtro lsystem only operates at a
reduce dcapacity. If you require full climat e
contro lcapacity, th eEC Ostart/sto pfunction
can be deactivated by pressing th eEC Obut -
to n (
Ypage 108).
108Driving
Driving and parking
Page 111 of 294

Automa tic engine start
The engin estart sautomatically if:
RIn general :
-you switch off th eECO start/sto pfunction
by pressing th eECO butto n
-you release th ebrakes when in transmis -
sion position hori, when th eHOLD
function is inactive
RBy th edriver :
-you release th ebrakes when in transmis -
sion position hori
-you depress th eaccelerato rpedal
-you engage revers egear k
-you mov eth etransmission out of position
j
-you switch to drive program Sor M
(Mercedes-AM Gvehicles)
-you unfasten your seat belt or open th e
driver's door
RBy th esystem:
-th evehicl estart sto rol l
-thebrak esystem require sthis
-th etemperature in th evehicl einterior devi-
ate sfrom th eset range
-th esystem detects moisture on th ewind-
shield when th eair-conditioning system is
switched on
-th econdition of charge of th ebattery is to o
low
iShifting th etransmission to position j
does no tstart th eengine.
Driving109
Driving and parking
Z