MERCEDES-BENZ GLS 2023 Owners Manual

Remove the valve cap from valve 7 on the
faulty tire.Screw Nlling hose 8 onto valve 7.Insert plug 4 into a 12!

&WARNING Risk of accident from driving
with sealed tires
A tire temporarily sealed with tire sealant
impairs the handling characteristics and is not suitable for higher speeds.
Adapt your driving style accordingly and
drive carefully.Do not exceed the maximum speed limit with a tire that has been repaired using
tire sealant.Observe the maximum permissible speed of
50 mph (80 km/h) for a tire sealed with tire
sealant.*NOTE Staining caused by leaking tire seal-
ant
Aser use, excess tire sealant may leak out
from the Nlling hose.
Therefore, place the Nlling hose in the
plastic bag that contained the TIREFIT
kit.+ENVIRONMENTAL NOTE Environmental
pollution caused by environmentally irre-
sponsible disposal
Tire sealant contains pollutants.
Have the tire sealant bottle disposed of
professionally, e.g. at an authorized
Mercedes-Benz Center.Stow the tire sealant bottle and the tire inOa-
tion compressor.Pull away immediately.Stop driving aser approximately ten minutes
and check the tire pressure using the tire
inOation compressor.
The tire pressure must now be at least
130 kPa (1.3 bar/19 psi).&WARNING Risk of accident due to the
speciNed tire pressure not being attained
If the speciNed tire pressure is not reached,
the tire is too badly damaged. The tire sealant
cannot repair the tire in this instance.
The braking and driving characteristics may be
greatly impaired.Do not continue driving.Consult a qualiNed specialist workshop.
In cases such as the one mentioned above, con-
tact an authorized Mercedes-Benz Center. Or call1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
To increase the tire pressure: switch on the
tire inOation compressor.To reduce the tire pressure: press pressure
release button 1 next to manometer 2.360Breakdown assistance

When the tire pressure is correct, unscrew the
Nlling hose from the valve of the sealed tire.Screw the valve cap onto the valve of the
sealed tire.Pull the tire sealant bottle out of the tire inOa-
tion compressor.
The Nlling hose stays on the tire sealant bottle.Drive to the nearest qualiNed specialist work-
shop and have the tire, tire sealant bottle and
Nlling hose replaced there.
Battery (vehicle)
Notes on the 12 V battery
&WARNING Risk of an accident due to work
carried out incorrectly on the battery
Work carried out incorrectly on the battery
can, for example, lead to a short circuit. This can restrict functions relevant for safety sys-
tems and impair the operating safety of your
vehicle.
You could lose control of the vehicle in the fol-
lowing situations in particular:
= When braking
= In the event of abrupt steering maneuvers
and/or when the vehicle\bs speed is not
adapted to the road conditionsIn the event of a short circuit or a similar incident, contact a qualiNed specialist
workshop immediately.Do not drive on.Always have work on the battery carried
out at a qualiNed specialist workshop.
=
Further information on ABS (  page 213)
= Further information on ESP n
For safety reasons, Mercedes-Benz recommends that you only use batteries which have been
approved for your vehicle by Mercedes-Benz.
All vehicles except vehicles with a lithium-ion bat- tery&WARNING Risk of explosion due to elec-
trostatic charge
Electrostatic charge can ignite the highly explosive gas mixture in the battery.
To discharge any electrostatic charge
that may have built up, touch the metal
vehicle body before handling the battery.
The highly Oammable gas mixture is created while
the battery is charging and during starting assis-
tance.
&WARNING Danger of chemical burns from
the battery acid
Battery acid is caustic.
Avoid contact with the skin, eyes or
clothing.Do not lean over the battery.Do not inhale battery gases.Keep children away from the battery.Breakdown assistance361

Immediately rinse battery acid oM thor-
oughly with plenty of clean water and
seek medical attention immediately.
All vehicles
+ENVIRONMENTAL NOTE Environmental
damage due to improper disposal of bat- teries
Batteries contain pollutants. It is
illegal to dispose of them with the household rubbish.

Dispose of batteries in an
environmentally responsible manner.
Take discharged batteries to a qualiNed
specialist workshop or to a collection
point for used batteries.
If you have to disconnect the 12 V battery, con- tact a qualiNed specialist workshop.
Comply with safety notes and take protective
measures when handling batteries.Risk of explosion.Fire, naked Oames and smoking are
prohibited when handling the battery.
Avoid creating sparks.Electrolyte or battery acid is corrosive.
Avoid contact with the skin, eyes or
clothing. Wear suitable protective
clothing, in particular gloves, an apron
and a face mask. Immediately rinse
electrolyte or acid splashes oM with
clean water. Consult a doctor if neces-
sary.Wear safety glasses.Keep children away.Observe this Operator\bs Manual.
Observe the following if you do not intend to use
the vehicle over an extended period of time:
= Activate standby mode.
= Alternatively: connect the battery to a battery
charger approved by Mercedes-Benz or con-
sult a qualiNed specialist workshop to discon-
nect the battery.
Notes on starting assistance and charging the 12
V battery
All vehicles
When charging the battery and during starting assistance, always use the jump-start connection
point in the engine compartment.
362Breakdown assistance

*NOTE Damage to the battery due to over-
voltage
When charging using a battery charger without
a maximum charging voltage, the battery or the on-board electronics may be damaged.
Only use battery chargers with a maxi-
mum charging voltage of 14.8 V.&WARNING Risk of explosion due to the
ignition of hydrogen gas
If there is a short circuit or sparks are created,
there is a danger of hydrogen gas igniting
when you charge the battery.
Make sure that the POSITIVE terminal of
a connected battery does not come into
contact with vehicle parts.Never place metal objects or tools on a
battery.When connecting and disconnecting the battery, always observe the sequence of
battery terminals described.During starting assistance, always take
care to connect only battery terminals of
identical polarity.During starting assistance, observe the sequence described for connecting and
disconnecting the jumper cables.Do not connect or disconnect the bat-
tery terminals with the engine running.&WARNING Risk of explosion due to a mix-
ture of explosive gases
A mixture of explosive gases can escape from
the battery during charging and jump starting.
Fire, open Oames, smoking and creating
sparks must be avoided.Make sure that there is suPcient ventila-
tion.Do not stand over the battery.&WARNING Risk of explosion from a frozen
battery
A discharged battery may freeze at tempera-
tures slightly above or below freezing point.
During starting assistance or battery charging,
battery gas can be released.
Always allow a battery to thaw before
charging it or performing starting assis-
tance.
If the indicator/warning lamps in the instrument cluster do not light up at low temperatures, it is
very likely that the discharged battery has frozen.
In this case you may neither jump-start the vehi- cle nor charge the battery.
The service life of a battery that has been thawedmay be dramatically shortened. The starting char-
acteristics may be impaired, especially at low
temperatures.
It is recommended that you have a thawed battery checked at a qualiNed specialist workshop.
Breakdown assistance363

All vehicles*NOTE Damage caused by numerous or
extended attempts to start the engine
Numerous or extended attempts to start the
engine may damage the catalytic converter
due to non-combusted fuel.
Avoid numerous and extended attempts
to start the engine.
Observe the following points during starting assis-
tance and when charging the battery:
= Only use undamaged jumper cable/charging
cables with a suPcient cross-section and
insulated terminal clamps.
= Non-insulated parts of the terminal clamps
must not come into contact with other metal
parts while the jumper cable/charging cable is connected to the battery/jump-start con-
nection point.
= The jumper cable/charging cable must not
come into contact with any parts which may move when the engine is running.
= Always make sure that neither you nor the bat-
tery is electrostatically charged.
= Keep away from Nre and naked Oames.
= Do not lean over the battery.
Observe the additional following points when
charging the battery:
= Only use battery chargers tested and
approved for Mercedes-Benz.
= Read the battery charger\bs operating instruc-
tions before charging the battery.
Observe the additional following points during
starting assistance:
= Starting assistance may only be provided
using vehicles, batteries or other jump start
devices with a nominal voltage of 12 V.
= The vehicles must not touch.
= Vehicles with a gasoline engine: jump-start the
vehicle only when the engine and exhaust sys- tem are cold.Starting assistance and charging the 12 V battery
Requirements
= The vehicle is secured with the electric park-
ing brake.
= Vehicles with automatic transmission: the
transmission is in position ].
= The vehicle and all electrical consumers are
switched oM.
= The hood is open.
364Breakdown assistance

Example: engine compartment
Slide cover 1 of POSITIVE contact 2 on the
jump-starting connection point in the direction
of the arrow.Connect POSITIVE contact 2 on your vehicle
to the positive terminal of the donor battery using the jumper cable/charging cable.Always begin with POSITIVE contact 2 on
your own vehicle Nrst.During starting assistance: start the engine of
the donor vehicle and run at idle speed.Connect the negative terminal of the donor
battery and ground point 3 of your own vehi-
cle by using the jumper cable/charging cable.
Begin with the donor battery Nrst.During starting assistance: start the engine of
your own vehicle.During the charging process: start the charg-
ing process.During starting assistance: let the engines run
for several minutes.During starting assistance: before disconnect-
ing the jumper cable, switch on an electrical consumer on your own vehicle, e.g. the rear
passenger compartment window defroster or
lighting.
When the starting assistance/charging process is complete, perform the following steps:
First, remove the jumper cable/charging cable
from ground point 3 and the negative termi-
nal of the donor battery, then POSITIVE con-
tact 2 and the positive terminal of the donor
battery. Begin each time with the contacts on
your own vehicle Nrst.Aser removing the jumper cable/charging
cable, close cover 1 of POSITIVE contact
2 .
Further information can be obtained at a qualiNed
specialist workshop.
Replacing the 12 V battery
Observe the notes on the 12 V battery (  page 361).
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualiNed specialist
workshop, e.g. at an authorized Mercedes-Benz Center.
Breakdown assistance365

Observe the following notes if you want to replacethe battery yourself:
= Always replace a faulty battery with a battery
which meets the speciNc vehicle require-
ments.
The vehicle is equipped with an AGM technol-
ogy battery (Absorbent Glass Mat) or a lith- ium-ion battery. Full vehicle functionality is
only guaranteed with an AGM battery or lith- ium-ion battery. For safety reasons, Mercedes-Benz recommends that you only use batteries
which have been tested and approved for your vehicle by Mercedes-Benz.
= Carry over detachable parts, such as vent
hoses, elbow installing or terminal covers from the battery being replaced.
= Make sure that the vent hose is always con-
nected to the original opening on the side of
the battery.Install any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
= Make sure that detachable parts are recon-
nected in the same way.
Tow starting or towing away
Overview of the permitted towing methods (not
plug-in hybrid)
*NOTE Damage caused by automatic brak-
ing
If one of the following functions is activated, the vehicle brakes automatically in certain sit-
uations:
= Active Brake Assist
=
Active Distance Assist DISTRONIC
= HOLD function
= Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar situa-
tions:During towing.In a car wash.
Mercedes-Benz recommends transporting your vehicle in the case of a breakdown, rather than towing it away.
For towing, use a tow rope or tow bar with both
axles on the ground. Do not use tow bar systems.
*NOTE Damage to the vehicle due to tow-
ing away incorrectlyObserve the instructions and notes on
towing away.366Breakdown assistance

Permitted towing methodsVehicle equipment/towing method
Both axles on the groundFront axle raisedRear axle raised
4MATIC vehiclesYes, maximum 31 miles (50 km) at
31 mph (50 km/h)NoNoVehicles with rear wheel driveYes, maximum 31 miles (50 km) at
31 mph (50 km/h)NoYes, if the steering wheel is Nxed in
the center position with a steering wheel lockTowing away the vehicle with both axles on thegroundObserve the notes on the permitted towingmethods (  page 366).Make sure that the battery is connected and
charged.
A discharged battery has the following eMects:
= The vehicle cannot be switched on
=The electric parking brake cannot be released
or applied
= The transmission cannot be shised to position
\\ or ]\bIf the transmission cannot be shised to posi-
tion \\, or the multifunction display in the
instrument cluster does not show anything, the vehicle must be transported away
(  page 369). A towing vehicle with lisingequipment is required for vehicle transporta-
tion.*NOTE Damage due to towing away at
excessively high speeds or over long dis-
tances
The drivetrain could be damaged when towing
at excessively high speeds or over long distan-
ces.
Breakdown assistance367

A towing speed of 30 mph (50 km/h)
must not be exceeded.A towing distance of 30 miles (50 km)
must not be exceeded.&WARNING Risk of accident when towing a
vehicle which is too heavy
If the vehicle to be tow-started or towed away
is heavier than the permissible gross mass of
your vehicle, the following situations can
occur:
= The towing eye may become detached.
= The vehicle/trailer combination may
swerve or rollover.
Before tow-starting or towing away,
check if the vehicle to be tow-started or
towed away exceeds the permissible
gross mass.Information on the permissible gross mass of
the vehicle can be found on the vehicle identi-
Ncation plate ( page 411).Do not open the driver\bs door or front
passenger door as the transmission may oth-
erwise shis to position ] automatically.Install the towing eye (  page 370).Fasten the towing device.*NOTE Damage due to incorrect connec-
tion of the tow barOnly connect the tow rope or tow bar to
the towing eyes.\bYou can also attach the tow bar to the trailer
hitch.Deactivate the automatic locking mechanism
(  page 77).Do not activate the HOLD function.Deactivate the tow-away alarm (  page 96).Deactivate Active Brake Assist (  page 239).Shis the transmission to position \\
(  page 195).Release the electric parking brake.&WARNING Risk of accident due to limited
safety-related functions during the towing
process
Safety-related functions are limited or no lon-
ger available in the following situations:
= The vehicle is switched oM.
= The brake system or power steering sys-
tem is malfunctioning.
= The energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towed away, signiNcantly
more eMort may be required to steer and
brake than is normally required.
Use a tow bar.Make sure that the steering wheel can
move freely before towing the vehicle
away.368Breakdown assistance