2023 MERCEDES-BENZ GLS Owners Manual

Pull connector 4 and the hose out of the
housing.Unscrew the cap from the valve on the col- lapsible spare wheel.Screw union nut 1 of the hose onto the
valve.Make sure on and oM switch 3 of the tire
inOation compressor is set to 0.Insert connector 4 into the cigarette lighter
socket or into a 12 V socket (  page 142) in
your vehicle.Switch on the power supply (  page 175).Press on and oM switch 3 on the tire inOation
compressor to I.
The tire inOation compressor is switched on.
The tire is inOated. The tire pressure is shown
on manometer 2.Pump the tire to the speciNed tire pressure.\bThe speciNed tire pressure is printed on the
yellow label of the collapsible spare wheel.When the speciNed tire pressure has been
reached, press on and oM switch 3 on the
tire inOation compressor to 0.If the tire pressure is higher than the speciNed
pressure, press pressure release valve button
5 until the correct tire pressure has been
reached.Wheels and tires407

Notes on technical data*NOTE Mercedes-AMG vehiclesObserve the notes in the Supplement.
You could otherwise fail to recognize
dangers.
The data stated only applies to vehicles with standard equipment. You can obtain further infor-
mation from an authorized Mercedes-Benz Cen-
ter.
Vehicle electronics
Two-way radios
Notes on installing two-way radios
&WARNING Risk of accident due to
improper work on two-way radios
If two-way radios are manipulated or retroNt-
ted incorrectly, the electromagnetic radiation
from the two-way radios can interfere with the vehicle electronics and jeopardize the operat-
ing safety of the vehicle.
You should have all work on electrical
and electronic components carried out
at a qualiNed specialist workshop.&WARNING Risk of accident due to
improper operation of two-way radios
If you use two-way radios in the vehicle
improperly, their electromagnetic radiation
can disrupt the vehicle\bs electronics. This is
the case in the following situations, in particu-
lar:
= The two-way radio is not connected to an
exterior antenna.
= The exterior antenna is installed incor-
rectly or is not a low-reOection antenna.
This could jeopardize the operating safety of
the vehicle.
Have the low-reOection exterior antenna
installed at a qualiNed specialist work-
shop.When operating two-way radios in the
vehicle, always connect them to the low-
reOection exterior antenna.*NOTE Invalidation of the operating permit
due to failure to comply with the instruc-
tions for installation and use
The operating permit may be invalidated if the instructions for installation and use of two-wayradios are not observed.
Only use approved frequency bands.Observe the maximum permissible out-put power in these frequency bands.Only use approved antenna positions.408Technical data

1Front roof area2Rear roof area3Rear fenders
On vehicles with a panoramic sliding sunroof,installing an antenna in the front or rear roof areais not permitted.
On the rear fenders, it is recommended that you
install the antenna on the side of the vehicle clos- est to the center of the road.
Use Technical SpeciNcation ISO/TS 21609 (Road
Vehicles !

The following can be used in the vehicle without
restrictions:
= two-way radios with a maximum transmission
output of up to 100 mW
= RF transmitters with transmitter frequencies in
the 380 - 410 MHz frequency band and a
maximum transmission output of up to 2 W
(TETRA)
= mobile phones (2G/3G/4G)
There are no restrictions when positioning the
antenna on the outside of the vehicle for the fol-
lowing frequency bands:
= Terrestrial Trunked Radio (TETRA)
= 70 cm frequency band
= 2G/3G/4G
Regulatory radio identiNcation and notes
Regulatory radio identiNcation of small compo-
nents
Manufacturer information about radio-based vehi-
cle components can be found using the key phrase "Regulatory radio identiNcation in the Dig-
ital Operator\bs Manual in the vehicle, on the Inter-
net and in the app.
Regulatory radio identiNcation !

Vehicle identiNcation plate, VIN and engine num-
ber overview
Vehicle identiNcation plateVehicle identiNcation plate (USA only)1Maximum permissible gross vehicle weight2Maximum permissible front axle load3Maximum permissible rear axle load4Paint code5VIN (vehicle identiNcation number)Vehicle identiNcation plate (Canada only)1Maximum permissible gross vehicle weight2Maximum permissible front axle load3Maximum permissible rear axle load4Paint code5VIN (vehicle identiNcation number)
The maximum permissible gross vehicle weight is
made up of the vehicle weight, all vehicle occu-
pants, the fuel and the load. The maximum gross
axle weight rating is the maximum weight that can be carried on one axle (front or rear axle).
Technical data411

Never exceed the maximum permissible gross
vehicle weight or the maximum gross axle weight
rating for the front or rear axle.
VIN in front of the front seat1VIN (vehicle identiNcation number)Additional plates1Plate with information about emissions test-
ing, including conNrmation of emissions
guidelines at the U.S. federal level as well as
for California2Engine number stamped into the crankcase3VIN (vehicle identiNcation number) as a label
at the lower edge of the windshieldOperating Ouids
Notes on operating Ouids
*NOTE Mercedes-AMG vehiclesObserve the notes in the Supplement.
You could otherwise fail to recognize
dangers.&WARNING Risk of injury from operating
Ouids harmful to your health
Operating Ouids may be poisonous and harm-
ful to your health.
Observe the text on the original contain-
ers when using, storing or disposing of
operating Ouids.Always store operating Ouids sealed in
their original containers.Always keep children away from operat-
ing Ouids.412Technical data

+ENVIRONMENTAL NOTE Pollution of the
environment due to irresponsible disposal
of operating Ouids
Incorrect disposal of operating Ouids can
cause considerable damage to the environ- ment.
Dispose of operating Ouids in an environ-
mentally responsible manner.
Operating Ouids include the following:
= fuels
= lubricants
= coolant
= brake Ouid
= windshield cleaning agent
= climate control system refrigerant
Only use products approved by Mercedes-Benz.
Damage caused by the use of products that have not been approved for the vehicle is not covered
by the Mercedes-Benz warranty or goodwill ges- tures.
The operating Ouids approved by Mercedes-Benz
can be identiNed by the following inscriptions on
the container:
= MB-Freigabe (e.g. MB-Freigabe 229.51)
= MB-Approval (e.g. MB-Approval 229.51)
Further information on approved operating Ouids:
= in the Mercedes-Benz SpeciNcations for Oper-
ating Fluids by entering the designation
- at https://bevo.mercedes-benz.com
- in the Mercedes-Benz BeVo app
= at a qualiNed specialist workshop&WARNING Risk of Nre or explosion from
fuel
Fuels are highly Oammable.
Fire, open Oames, smoking and creating
sparks must be avoided.Before and during refueling, switch oM
the vehicle and, if installed, the station- ary heater.&WARNING Risk of injury from fuels
Fuels are poisonous and hazardous to your
health.
Do not swallow fuel or let it come into
contact with skin, eyes or clothing.Do not inhale fuel vapor.Keep children away from fuel.Keep doors and windows closed during
the refueling process.
If you or other people come into contact with
fuel, observe the following:
Immediately rinse fuel oM your skin with
soap and water.If fuel comes into contact with your eyes, immediately rinse them thoroughly with
clean water. Seek medical attention
immediately.If you swallow fuel, seek medical atten-
tion immediately. Do not induce vomit-
ing.Technical data413

Change immediately out of clothing thathas come into contact with fuel.Flexible-fuel vehicles can be refueled with the fol-lowing fuel types:
= premium-grade unleaded gasoline
= E85 fuel
= a mixture of E85 fuel and premium-grade
unleaded gasoline
Flexible-fuel vehicles can be identiNed by the
Ethanol up to E85 sticker on the inside of the fuel
Nller Oap.
Depending on the country, the fuels you can use in your vehicle may diMer from the information in
the Operator\bs Manual. The fuels that have been
approved for your vehicle can be found on the
instruction label on the inside of the fuel Nller Oap.
Fuel
Notes on fuel grades for vehicles with a gasoline
engine
Observe the notes on operating Ouids
(  page 412).
*NOTE Damage caused by the wrong fuel
Even small amounts of the wrong fuel could
result in damage to the fuel system, the
engine and the emission control system.
Only refuel with low-sulfur unleaded fuel.
This fuel may contain up to 10% ethanol by vol-
ume. Your vehicle is suitable for use with E10 fuel.
Never refuel with one of the following fuels: = Diesel
= Gasoline with more than 10% ethanol by
volume, e.g. E15, E85, E100
= Gasoline with more than 3% methanol by
volume, e.g. M15, M30, M85, M100
= Gasoline with additives containing metal
If you have accidentally refueled with the
wrong fuel:
Do not switch on the ignition.Consult a qualiNed specialist workshop.If the available fuel is not suPciently low in sulfur,
this can produce unpleasant odors.
Only refuel with fuel that has at least the octane number speciNed in the instruction label in the
fuel Nller Oap ( page 201). This may reduce
engine output and increase fuel consumption.
If you want maximum engine output: only refuel
with unleaded premium grade gasoline with an
octane number of at least 91 AKI/95 RON.
As a temporary measure, if the recommended fuel
is not available, you may also refuel with unleaded
regular gasoline with at least 87 AKI/91 RON. This may reduce engine output and increase fuel
consumption.
Never refuel using gasoline with an even lower
RON.*NOTE Premature wear caused by unlea-
ded regular gasoline
Unleaded regular gasoline can cause the
engine to wear more quickly and impair lon-
gevity and performance.
414Technical data