MERCEDES-BENZ GLS 2023 Owners Manual

*NOTE Damage due to excessive tractive
power
If you pull away sharply, the tractive power
may be too high and the vehicles could be
damaged.
Pull away slowly and smoothly.
Loading the vehicle for transport
Observe the notes on towing away (  page 367).Connect the towing device to the towing eye
in order to load the vehicle.\bYou can also attach the tow bar to the trailer
hitch.Shis the automatic transmission to position
\\ .\bThe automatic transmission may be locked in
position ] in the event of damage to the
electrics. To shis to \\, provide the on-board
electrical system with power (  page 364).Load the vehicle onto the transporter.Shis the automatic transmission to position
] .Use the electric parking brake to secure the
vehicle against rolling away.Only secure the vehicle by the wheels.
Vehicles with ADS PLUS (Adaptive Damping Sys- tem PLUS)
&WARNING Risk of an accident when trans-
porting vehicles with Adaptive Damping
System PLUS
When transporting vehicles with Adaptive Damping System PLUS, the vehicle/trailer
combination may begin to rock and start to
skid.
Load the vehicle correctly onto the transporter.Secure the vehicle on all four wheels
with suitable tensioning straps.Do not exceed the maximum permissible
speed of 35 mph (60 km/h) when trans-
porting.*NOTE Damage to the vehicle from secur-
ing it incorrectlyAser loading, the vehicle must be
secured on all four wheels. Otherwise,
the vehicle could be damaged.A minimum distance of 8 in (20 cm)
upwards and 4 in (10 cm) downwards
must be kept to the transport platform.Secure the vehicle on all four wheels aser
loading.Breakdown assistance369

4MATIC vehicles/vehicles with automatic trans-
missionMake sure that the front and rear axles come
to rest on the same transportation vehicle.*NOTE Damage to the drive train due to
incorrect positioning of the vehicleDo not position the vehicle above the
connection point of the transport vehi- cle.Towing eye storage location
Example: towing eye
Towing eye 1 is located under the cargo Ooor.
Installing and removing the towing eyePress the mark on cover 1 inwards and
remove.Screw in the towing eye clockwise as far as it
will go and tighten.370Breakdown assistance

Vehicles with a trailer hitch: vehicles with a trailer
hitch do not have a rear bracket for the towing
eye. Fasten the tow bar to the trailer hitch.Make sure that cover 1 engages in the
bumper when you remove the towing eye.*NOTE Damage to the vehicle due to incor-
rect use of the towing eye or trailer hitch
When a towing eye or trailer hitch is used to
recover a vehicle, the vehicle may be damaged
in the process.
Only use the towing eye or trailer hitch to
tow away or tow start the vehicle.Do not use the towing eye or trailer hitch
to tow the vehicle during recovery.Tow-starting the vehicle
Vehicles with automatic transmission
*NOTE Damage to the automatic transmis-
sion due to tow starting
The automatic transmission may be damaged
in the process of tow starting vehicles with
automatic transmission.
Vehicles with automatic transmission
must not be tow started.Vehicles with automatic transmissions must
not be tow-started.
Electrical fuses
Notes on electrical fuses
&WARNING Risk of accident and injury due
to overloaded lines
If you manipulate or bridge a faulty fuse or if
you replace it with a fuse with a higher amper-
age, the electric line could be overloaded.
This could result in a Nre.Always replace faulty fuses with speci-
Ned new fuses containing the correct
amperage.*NOTE Damage due to incorrect fuses
Using incorrect fuses can result in damage to
electrical components or systems or their functions being considerably restricted.
Use only fuses approved for Mercedes-
Benz with the respective speciNed fuse
rating.
Blown fuses must be replaced with fuses of the
same rating, which you can recognize by the color and the label. The fuse ratings and further infor-
mation to be observed can be found in the fuse
assignment diagram.
Fuse assignment diagram: on the fuse box in the
cargo compartment (  page 373).
Breakdown assistance371

*NOTE Damage or malfunctions caused by
moisture
Moisture may cause damage to the electrical
system or cause it to malfunction.
When the fuse box is open, make sure
that no moisture can enter the fuse box.When closing the fuse box, make sure
that the seal of the lid is positioned cor-
rectly on the fuse box.
If the newly inserted fuse also blows, have the cause traced and rectiNed at a qualiNed specialist
workshop.
Ensure the following before replacing a fuse: = The vehicle is secured against rolling away.
= All electrical consumers are switched oM.
= The vehicle is switched oM.
The electrical fuses are located in various fuse
boxes:
= Fuse box in the engine compartment on the
les-hand side of the vehicle, when viewed in
the direction of travel (  page 372)
=
Fuse box on the driver\bs side of the cockpit
(  page 373)
= Fuse box in the front passenger footwell
(  page 373)
= Fuse box in the cargo compartment on the
right-hand side of the vehicle, when viewed in the direction of travel (  page 373)
Opening and closing the fuse box in the engine
compartment
Requirement = You need a dry cloth and a screwdriver.
Observe the notes on electrical fuses (  page 371).
Opening
&WARNING Risk of injury from using the
windshield wipers when the hood is open
If the windshield wipers start moving when the
hood is open, you could be trapped by the
wiper linkage.
Always switch oM the windshield wipers
and vehicle before opening the hood.Remove any existing moisture from the fuse
box using a dry cloth.Loosen screws 2 and remove fuse box lid 1
from the top.372Breakdown assistance

ClosingCheck whether the seal is positioned correctly
in the lid.Insert the lid into the holder at the rear of the fuse box.Fold down the lid of the fuse box and tightenscrews 2.Close the hood.
Opening and closing the fuse box in the cockpit
=
Observe the notes on electrical fuses
(  page 371).
The fuse box is on the driver\bs side on the side of
the cockpit under a cover.
To open and close it, consult an authorized Mercedes-Benz Center.
Opening and closing the fuse box in the front
passenger footwell
Contact a Mercedes-Benz service center for
further information.Opening and closing the fuse box in the cargo
compartment
Observe the notes on electrical fuses
(  page 371).
Open the side cover.Remove cover 1.
The fuse assignment diagram is on the side of the
fuse box.
Breakdown assistance373

Notes on noise or unusual handling characteris-tics
Make sure there are no vibrations, noises or unusual handling characteristics when the vehicle
is in motion. This may indicate that the wheels or
tires are damaged. Hidden tire damage could also
be causing the unusual handling characteristics.
If you suspect that a tire is defective, reduce yourspeed immediately and have the tires and wheels
checked at a qualiNed specialist workshop.
Notes on regularly inspecting wheels and tires
&WARNING Risk of injury through damaged
tires
Damaged tires can cause tire pressure loss.
Check the tires regularly for signs of
damage and replace any damaged tires immediately.&WARNING Risk of hydroplaning due to
insuPcient tire tread
*nsuPcient tire tread will result in reduced tire
grip.
In heavy rain or slush the risk of hydroplaning is increased, in particular where speed is not
adapted to suit the conditions.
Thus, you should regularly check the
tread depth and the condition of the
tread across the entire width of all tires.
Minimum tread depth for:
= Summer tires:

Notes on snow chains&WARNING Risk of accident due to incor-
rectly installed snow chains
If you have installed snow chains on the front wheels, they may drag against the vehicle
body or chassis components.
Never install snow chains on the front
wheels.Only install snow chains on the rear
wheels in pairs.*NOTE Damage to components of the vehi-
cle body or chassis due to mounted snow
chains
If you mount snow chains to the front wheels
of 4MATIC vehicles, you may damage compo-
nents of the vehicle body or chassis.
Only mount snow chains to the rear
wheels of 4MATIC vehicles.
= Snow chains are only permissible for certain
wheel/tire combinations. You can obtain infor-
mation about this from an authorized
Mercedes-Benz Service Center.
= For safety reasons, only use snow chains that
have been speciNcally approved for your vehi-
cle by Mercedes-Benz, or snow chains with the same quality standard.
= Comply with the installation instructions of the
snow chain manufacturer.
= If snow chains are installed, the maximum per-
missible speed is 30 mph (50 km/h).
= Vehicles with Active Parking Assist: do not use
Active Parking Assist when snow chains are
installed.\bYou can deactivate ESP n
to pull away
(  page 216). This allows the wheels to spin,
achieving an increased driving force.Tire pressure
Notes on tire pressure
&WARNING Risk of accident due to insuP-
cient or excessive tire pressure
UnderinOated or overinOated tires pose in par-
ticular the following risks:
= The tires can burst.
= The tires can wear excessively and/or
unevenly.
= The driving characteristics as well as the
steering and braking characteristics may
be greatly impaired.
Comply with the recommended tire pres-
sures and check the tire pressure of all
tires, including the spare wheel, regu-
larly:
= Monthly
= When the load changes
= Before embarking on a longer journey
Wheels and tires375

=If operating conditions change, e.g. oM-
road drivingAdjust the tire pressure, if necessary.
Tire pressure which is too high or too low can:
= Shorten the service life of the tires.
= Cause increased tire damage.
= Adversely aMect driving characteristics and
thus driving safety, e.g. due to hydroplaning.
&WARNING Risk of accident due to too low
a tire pressure
Tires with pressure that is too low can over-
heat and burst as a consequence.
In addition, they also suMer from irregular
wear, which can signiNcantly impair the brak-
ing properties and the handling characteris-
tics.
Avoid excessively low tire pressure.
Tire pressure which is too low can cause:
= Tire defects as a result of overheating
=Impaired handling characteristics
= Irregular wear
= Increased fuel consumption&WARNING Risk of accident due to too high
a tire pressure
Tires with excessively high pressure can burst.
In addition, they also suMer from irregular
wear, which can signiNcantly impair the brak-
ing properties and the handling characteris-
tics.
Avoid excessively high tire pressures.
Tire pressure which is too high can cause:
= Increased braking distance
= Impaired handling characteristics
= Irregular wear
= Impaired driving comfort
= Susceptibility to damage
&WARNING Risk of accident due to repea-
ted pressure drop in the tires
The wheels, valves or tires could be damaged.
Too low a tire pressure can lead to the tires
bursting.
Examine the tires for foreign objects.Check whether the tire has a puncture or
the valve has a leak.If you are unable to rectify the damage,
contact a qualiNed specialist workshop.
You can Nnd information on tire pressure for the
vehicle\bs factory-installed tires on the following
labels:
= Tire and loading information placard on the
B!

permit any reliable conclusion about the tire pres-
sure.
Only correct the tire pressure when the tires are
cold. Conditions for cold tires:
= The vehicle has been parked with the tires out
of direct sunlight for at least three hours.
= The vehicle has traveled less than 1 mile
(1.6 km).
The vehicle\bs tires heat up when driving. As the temperature of the tires increases, so too does
the tire pressure.
Vehicles with a tire pressure monitoring system: you can also check the tire pressure using the on- board computer (  page 379).
The tire pressure recommended for increased
load/speed in the tire pressure table can aMect
the ride comfort.&WARNING Risk of accident due to unsuita-
ble accessories on tire valves
If you mount unsuitable accessories onto tire
valves, the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss.Only screw standard valve caps or valve
caps speciNcally approved by Mercedes-
Benz for your vehicle onto the tire valve.
Notes on towing a trailer
Always inOate the rear axle tires to the recommen-
ded tire pressure on the tire pressure table for
increased load.
Tire pressure table
The tire pressure table is on the inside of the fuel Nller Oap.
\bThe data shown in the images is example
data.
The tire pressure table shows the recommended
tire pressure for all tires approved for this vehicle.
The recommended tire pressures are valid for
cold tires under various operating conditions
according to the load and/or speed of the vehi- cle.
If one or more tire sizes precede a tire pressure,
the following tire pressure information is only valid for those tire sizes and their respective load con-
dition.
The load conditions "partially laden" and "fully
laden" are deNned in the table for diMerent num-
bers of passengers and amounts of luggage. The actual number of seats may diMer from this.
Wheels and tires377

Some tire pressure tables only show the rim diam-eter instead of the complete tire size, e.g. R18.
The rim diameter is part of the tire size and can
be found on the tire side wall (  page 388).
= Tire and loading information placard
(  page 380)
= Maximum tire pressure (  page 387)
Checking the tire pressure manuallyRead the tire pressure recommended for the
current operating conditions from the tire and
loading information placard or the tire pres-
sure table. Observe the notes on tire pressure.Remove the valve cap of the tire to be
checked.Press the tire pressure gauge securely onto the valve.Read the tire pressure.If the tire pressure is lower than the recom-
mended value, increase the tire pressure to
the recommended value.If the tire pressure is higher than the recom- mended value, release air. To do so, press
down the metal pin in the valve, e.g. using the
tip of a pen. Then check the tire pressure
again using the tire pressure gauge.Screw the valve cap onto the valve.
Further related subjects:
= Notes on tire pressure (  page 375)
= Tire pressure table (  page 377)
=
Tire and loading information placard
(  page 380)
Tire pressure monitoring system
Function of the tire pressure monitoring system
&DANGER Risk of accident due to incorrect
tire pressure
Each tire, including the spare (if provided),
should be checked monthly when cold and inOated to the inOation pressure recommen-
ded by the vehicle manufacturer on the vehi-
cle placard or tire inOation pressure label. (If
your vehicle has tires of a diMerent size than
the size indicated on the vehicle placard or
tire inOation pressure label, you should deter-
mine the proper tire inOation pressure for
those tires.)
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pres-sure telltale when one or more of your tires is
signiNcantly under-inOated. Accordingly, when
378Wheels and tires