MERCEDES-BENZ GLS 2023 Owners Manual

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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 !

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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 !

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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

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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

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+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

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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

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If unleaded premium grade gasoline is unavail-
able and you have to refuel using unleaded
regular gasoline:Only Nll the fuel tank to half full with
unleaded regular gasoline and reNll as
soon as possible with unleaded premium
grade gasoline.Do not drive at the maximum speed.Avoid sudden acceleration and engine
speeds over 3,000 rpm.
Further information on fuel is available at the fol-
lowing locations:
= At a gas station
= At a qualiNed specialist workshop
= USA only: at http://www.mbusa.com
Information on additives in gasoline (vehicles with gasoline engine)
Observe the notes on operating Ouids
(  page 412).
*NOTE Damage from use of unsuitable
additives
Even small amounts of the wrong additive may
lead to malfunctions occurring.
Only add cleaning additives recommen-
ded by Mercedes-Benz to the fuel.
Mercedes-Benz recommends that you use brand-
name fuels with additives.
In some countries, the fuel available may not have
suPcient additives. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a Mercedes-Benz Service Cen-ter, mix the fuel with the cleaning additive recom-
mended by Mercedes-Benz. Observe the notes and mixing ratios indicated on the tank.
Tank content and fuel reserve
Total fuel tank capacity
ModelAll models23.8 gal (90.0 liters)Fuel tank total capacity (Mercedes-Maybach)ModelMercedes-Maybach
GLS 600 4MATIC23.8 gal (90.0 liters)
Fuel tank reserve
ModelAll models2.4 gal (9.0 liters)
Fuel tank reserve (Mercedes-Maybach)
ModelMercedes-Maybach
GLS 600 4MATIC3.2 gal (12.0 liters)
Engine oil
Notes on engine oil
Observe the notes on operating Ouids
(  page 412).
Technical data415

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*NOTE Engine damage caused by an incor-
rect oil Nlter, incorrect oil or additivesDo not use engine oils or oil Nlters other
than those which meet the speciNcations
necessary for the prescribed service
intervals.Do not alter the engine oil or oil Nlter in
order to achieve longer change intervals than prescribed.Do not use additives.Have the engine oil changed aser the
prescribed intervals.Mercedes-Benz recommends having the oil
changed at a qualiNed specialist workshop.
Only use engine oils approved for your vehicle by
Mercedes-Benz.
Engine oil quality and Nlling capacity
Engine oil speciNcationsModelMB-Freigabe or MB-
ApprovalGLS 450 4MATIC229.51, 229.52,229.61, 229.71
229.72*GLS 580 4MATIC229.52
229.61*
Engine oil speciNcations (Mercedes!

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Engine oil capacity (Mercedes-Maybach)ModelCapacityMercedes-Maybach
GLS 600 4MATIC10.0 US qt (9.5 liters)
Notes on brake Ouid
Observe the notes on operating Ouids
(  page 412).
&WARNING Risk of an accident due to
vapor pockets forming in the brake system
The brake Ouid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake Ouid. If the boiling point is too low,
vapor pockets may form in the brake system when the brakes are applied hard.
This causes the braking eMect to be impaired.
Have the brake Ouid renewed at the
speciNed intervals.Have the brake Ouid regularly replaced at a quali-
Ned specialist workshop.Only use a brake Ouid approved by Mercedes-
Benz according to MB-Freigabe or MB-Approval 331.0.
Coolant
Notes on coolant
Observe the notes on operating Ouids
(  page 412).
&WARNING !

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Observe the instructions in theMercedes-Benz SpeciNcations for Oper-
ating Fluids 320.1.
Have the coolant regularly replaced at a qualiNed
specialist workshop.
Proportion of antifreeze concentrate in the cool- ing system:
= A minimum of 50% (antifreeze protection down
to about -35°F (-37°C))
= A maximum of 55% (antifreeze protection
down to -49°F (-45°C))
Coolant Nlling capacity
Engine coolant
ModelCapacityGLS 450 4MATIC18.0 US qt
(17.0 liters)GLS 580 4MATIC16.6 US qt
(15.7 liters)Engine coolant (Mercedes-Maybach)ModelCapacityMercedes-Maybach
GLS 600 4MATIC16.6 US qt
(15.7 liters)
Notes on windshield washer Ouid
Observe the notes on operating Ouids
(  page 412).
&WARNING !

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