MERCEDES-BENZ GLS 2023 Owners Manual

Wait until the transfer case shis opera-
tion is complete.
This function is only available in vehicles with OM-
road package.
Shis the transfer case to the on-road position
HIGH RANGE or into the LOW RANGE oM-road
gear.
Do not switch oM the engine during shis operation
and do not shis the automatic transmission to
another position.
Shis ranges
= HIGH RANGE: Road position for all normal on-
road driving situations
= LOW RANGE: OM-road gear for driving oM-
road, when fording and on steep uphill or
downhill inclines
Properties of the LOW RANGE oM-road gear:
= Reduced maximum permissible speed:
31 mph (50 km/h)
= Increased tractive power
=Changing the transmission ratio by a factor of
about three
= Increased drive torque
Do not use LOW RANGE in the following situa-
tions:
= When driving on public roads.Shising the transfer case
Shising to the LOW RANGE oM-road gear
Requirements:
= You are not driving on a paved or public road.
= The vehicle is stationary.
Driving and parking199

Pull LOW RANGE 1 rocker switch.
Indicator lamp 2 will Oash. The shis request
stays active for a maximum of 30 seconds. If all requirements for shis operation are not ful-
Nlled within this time, indicator lamp 2
switches oM again and the shis operation
must be started again.Shis the transmission to position \\.
If shis operation is successful, the LOW
RANGE On message appears on the instru-
ment cluster, an audible signal sounds and
indicator lamp 2 and an indicator lamp in the
instrument cluster light up continuously.Shis the transmission to position [.\bIf you switch oM the vehicle in LOW RANGE, it
remains in LOW RANGE the next time you start the engine.\bYou will not be able to switch on LOW RANGEif drive program C or B is switched on.
The vehicle switches to drive program A.In the on-road position, shis to HIGH RANGE
Requirements:
= The vehicle is started and you are not driving
faster than 31 mph (50 km/h).Pull LOW RANGE 1 rocker switch.
The shis request stays active for a maximum
of 30 seconds. If all requirements for shis
operation have not been fulNlled within this
time, shis operation must be started again.Shis the transmission to position \\.
If shis operation is successful, the LOW
RANGE Off message appears on the instru-
ment cluster, an audible signal sounds and the indicator lamps go out.Shis the transmission to position [.
Function of 4MATIC
4MATIC ensures that all four wheels are driven. Together with ESP n
and 4ETS, 4MATIC improves
the traction of your vehicle whenever a driven wheel spins due to insuPcient traction.
You can display the current distribution of drive
torque to all four wheels on the head-up display and in the right-hand display range of the Instru-
ment Display. The fuller the respective scale, the higher the corresponding drive torque.
If you fail to adapt your driving style, 4MATIC can
neither reduce the risk of an accident nor override the laws of physics. 4MATIC cannot take account
of road, weather and traPc conditions. 4MATIC is
200Driving and parking

only an aid. You are responsible especially for
maintaining a safe distance from the vehicle in front, for vehicle speed, for braking in good time
and for staying in lane.\bIn wintry road conditions, the maximum eMect
of 4MATIC can be achieved only if you use
winter tires (M\fS tires), with snow chains if
necessary.
Refueling
Refueling the vehicle
&WARNING Risk of Nre or explosion from
fuel
Fuels are highly Oammable.
Fire, open Oames, smoking and creating
sparks must be avoided.Before refueling, switch oM the vehicle
and, if installed, the stationary heater,
and leave them switched oM during refu-
eling.&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.Change immediately out of clothing that has come into contact with fuel.&WARNING Risk of Nre and explosion due
to electrostatic charge
Electrostatic charge can ignite fuel vapor.
Before you open the fuel Nller cap or
take hold of the pump nozzle, touch the metallic vehicle body.To avoid creating another electrostatic
charge, do not get into the vehicle again
during the refueling process.*NOTE Damage caused by the wrong fuel
Vehicles with a gasoline engine:
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 spark-ignition
engine fuel.Driving and parking201

This fuel may contain up to 10% ethanol. Yourvehicle 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 vehicle.Consult a qualiNed specialist workshop.*NOTE Do not use diesel to refuel vehicles
with a gasoline engine
If you have accidentally refueled with the
wrong fuel:
= Do not switch on the vehicle. Otherwise
fuel can enter the engine.
Even small amounts of the wrong fuel
could result in damage to the fuel system and the engine. The repair costs are high.Consult a qualiNed specialist workshop.Have the fuel tank and fuel lines drained
completely.*NOTE Damage to the fuel system due to
overNlling the fuel tankOnly Nll the fuel tank until the pump noz-
zle switches oM.
If too much fuel has been added due, for
example, to a faulty Nlling pump:
Do not switch on the vehicle.Consult a qualiNed specialist workshop.*NOTE Fuel may spray out when you
remove the fuel pump nozzleOnly Nll the fuel tank until the pump noz-
zle switches oM.Requirements:
= The vehicle is unlocked.
Observe the notes on operating Ouids and fuel.
Refuel only with fuel that has at least the octane number speciNed in the information label in the
fuel Nller Oap. Otherwise, engine output may be
reduced and fuel consumption increased.202Driving and parking

1Fuel Nller Oap2Bracket for fuel Nller cap3Fuel type4QR code for rescue card5Tire pressure tablePress on the back area of fuel Nller Oap 1 .Turn the fuel Nller cap counter-clockwise and
remove it.Insert fuel Nller cap from above into bracket
2 .Completely insert the pump nozzle into the
tank Nller neck, hook in place and refuel.Only Nll the fuel tank until the pump nozzle
switches oM.Replace the cap on the Nller neck and turn
clockwise until it engages audibly.Close fuel Nller Oap 1 .
Parking
Parking the vehicle
&WARNING Risk of accident and injury
caused by an insuPciently secured vehi-
cle rolling away
If the vehicle is not securely parked suP-
ciently, it can roll away in an uncontrolled way
even at a slight downhill gradient.
On uphill or downhill gradients, turn the
front wheels so that the vehicle rolls
towards the curb if it starts moving.Apply the parking brake.Switch the transmission to position ].&WARNING Risk of Nre caused by hot
exhaust system parts
Flammable materials such as leaves, grass or
twigs may ignite.
Park the vehicle so that no Oammable
material can come into contact with hot
vehicle components.In particular, do not park on dry grass- land or harvested grain Nelds.&WARNING Risk of accident and injury due
to children les unattended in the vehicle
If children are les unsupervised in the vehicle,
they could, in particular:
= open doors, thereby endangering other
persons or road users.
= get out and be struck by oncoming traPc.
Driving and parking203

=operate vehicle equipment and become
trapped, for example.
In addition, the children could also set the
vehicle in motion, for example by:
= releasing the parking brake.
= changing the transmission position.
= starting the vehicle.Never leave children unattended in the
vehicle.When leaving the vehicle, always take the SmartKey with you and lock the vehicle.Keep the vehicle SmartKey out of reach
of children.*NOTE Damage to the vehicle due to it roll-
ing awayAlways secure the vehicle against rolling away.*NOTE Damage due to the vehicle lowering
Vehicles with AIRMATIC or E-ACTIVE BODY
CONTROL: The vehicle can lower because of
temperature diMerences or longer non-opera-
tional times. This can cause damage to parts
of the body.
When stopping the vehicle and when driving oM, make sure that there are no
obstacles such as curbs under or in the
immediate vicinity of the body.Bring the vehicle to a standstill by pressing the brake pedal.On gradients, turn the front wheels so that the vehicle will roll towards the curb if it starts
moving.Apply the electric parking brake.204Driving and parking

Engage transmission position ] in a station-
ary vehicle with the brake pedal depressed
(  page 195).Switch oM the vehicle by pressing button 1.Release the service brake slowly.Get out of the vehicle and lock it.\bWhen you park the vehicle, you can still oper-
ate the side windows and the sliding sunroof for approximately four minutes if the driver\bsdoor is closed.\bWhen you park the vehicle, you can still oper-
ate the side windows and the panoramic slid- ing sunroof for approximately four minutes if
the driver\bs door is closed.
Garage door opener
Programming buttons for the garage door opener
&DANGER Risk of death caused by exhaust
gases
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and leads to poisoning.Never leave the engine or, if present, the
auxiliary heating running in an enclosed
space without suPcient ventilation.&WARNING Risk of injury by becoming
trapped when opening and closing a garage door
When you operate or program a garage door
with an integrated garage door opener, per- sons can become trapped or struck by the
garage door if they stand within its range of movement.
Always make sure that nobody is withinthe range of the garage door\bs move-
ment.Only operate the following doors using the garage
door opener:
= Doors with a safety stop and reversing func-
tion= Doors that conform to the current U.S. safety
standards
Before programming the garage door opener, park
the vehicle outside the garage. Make sure that the
vehicle is switched on but not started.
Requirements
= The vehicle has been parked outside the
garage or outside the range of movement of
the door.
= The vehicle is switched on.
= The vehicle has not been started.\bThe garage door opener function is always
available when the vehicle is switched on.Driving and parking205

Check that the transmitter frequency of the
remote control has a frequency range of 280
to 868 MHz.
Radio equipment approval number: = NZLMUAHL5 (USA)
= 4112A-MUAHL5 (Canada)Press and hold button 1, 2 or 3 that you
wish to program.
Indicator lamp 4 will Oash yellow.\bIt can take up to 20 seconds before the indi-
cator lamp Oashes yellow.Release the button previously pressed.
Indicator lamp 4 will continue to Oash yellow.Point remote control 5 from a distance of
0.4 in (1 cm) to 3 in (8 cm) towards button
1 , 2 or 3.Press and hold button 6 of remote control
5 until one of the following signals appears:
= Indicator lamp 4 lights up green continu-
ously. Programming is complete.
= Indicator lamp 4 Oashes green. Program-
ming was successful. Additionally, the roll-
ing code must be synchronized with the door system.If indicator lamp 4 does not light up or Oash
green: repeat the procedure.Release all of the buttons.\bThe remote control for the door drive is not
included in the scope of delivery of the garage
door opener.
Synchronizing the rolling code
Requirements
= The door system uses a rolling code.
= The vehicle must be within range of the garage
door or door drive.
= The vehicle as well as persons and objects are
located outside the range of movement of the door.
Press the programming button on the door
drive unit.
Initiate the next step within approximately
30 seconds.Press previously programmed button 1, 2
or 3 repeatedly until the door closes.
When the door closes, programming is com-
pleted.\bPlease also read the operating instructions for
the door drive.206Driving and parking

Troubleshooting when programming the remote
controlCheck if the transmitter frequency of remote
control 5 is supported.Replace the batteries in remote control 5.Hold remote control 5 at various angles from
a distance of 0.4 in (1 cm) to 3 in (8 cm) front
of the inside rearview mirror. You should test
every position for at least 25 seconds before
trying another position.Hold remote control 5 at the same angles at
various distances in front of the inside rear-
view mirror. You should test every position for
at least 25 seconds before trying another
position.On remote controls that transmit only for a
limited period, press button 6 on remote
control 5 again before transmission ends.Angle the antenna line of the garage door
opener unit towards the remote control.\bIt is possible that older garage doors cannot
be operated using the remote control in the inside rearview mirror even aser you have
successfully performed the measures descri-bed above. If this is the case, contact the
HomeLink n
Hotline.\bSupport and additional information on pro-
gram:
= on the toll free HomeLink n
Hotline on
1-800-355-3515
= on the Internet at https://
www.homelink.com/mercedes
Opening or closing a garage door
Requirements
= The corresponding button is programmed to
operate the door.
Press and hold button 1, 2 or 3 until the
door opens or closes.If indicator lamp 4 Oashes yellow aser
approximately 20 seconds: press and hold the
button previously pressed again until the door opens or closes.
Clearing the garage door opener memory
Press and hold buttons 1 and 3.
Indicator lamp 4 will light up yellow.If indicator lamp 4 Oashes green: release
buttons 1 and 3.
The entire memory has been deleted.
Electric parking brake
Function of the electric parking brake (applying
automatically)
&WARNING Risk of accident and injury due
to children les unattended in the vehicle
If children are les unsupervised in the vehicle,
they could, in particular:
= open doors, thereby endangering other
persons or road users.
= get out and be struck by oncoming traPc.
= operate vehicle equipment and become
trapped, for example.
In addition, the children could also set the
vehicle in motion, for example by:
= releasing the parking brake.
= changing the transmission position.
Driving and parking207

=starting the vehicle.Never leave children unattended in the
vehicle.When leaving the vehicle, always take the SmartKey with you and lock the vehicle.Keep the vehicle SmartKey out of reach
of children.
The electric parking brake is applied if the trans- mission is in position ] and one of the following
conditions is fulNlled:
= The vehicle is switched oM.
= The seat belt tongue is not inserted in the seat
belt buckle of the driver\bs seat and the driver\bs
door is opened.
= The transfer case is in the LOW RANGE posi-
tion.
\bTo prevent application: pull the handle of the
electric parking brake (  page 209).In the following situations, the electric parking
brake is also applied: = The HOLD function is keeping the vehicle sta-
tionary.
= Active Parking Assist is keeping the vehicle
stationary.
= Active Distance Assist DISTRONIC is bringing
the vehicle to a standstill.
= In addition, one of the following conditions
must be fulNlled:
- The vehicle is switched oM.
- The seat belt tongue is not inserted in the
seat belt buckle of the driver\bs seat and
the driver\bs door is opened.
- There is a system malfunction.
- The power supply is insuPcient.
- The vehicle is stationary for a lengthy
period.
When the electric parking brake is applied, the red I (USA) or $ (Canada) indicator lamp
lights up in the instrument cluster.\bThe electric parking brake is not automatically
applied if the vehicle is switched oM by the
ECO start/stop function.
Function of the electric parking brake (releasing
automatically)
The electric parking brake is released when the following conditions are fulNlled:
= The driver\bs door is closed.
= The vehicle has been started.
= The transmission is in position [ or ^ and
you depress the accelerator pedal or you shis
from transmission position ] to [ or ^
when on level ground.
= If the transmission is in position ^, the tail-
gate must be closed.
= The seat belt tongue is inserted into the seat
belt buckle of the driver\bs seat.
If the seat belt tongue is not inserted into the
seat belt buckle of the driver\bs seat, one of the following conditions must be fulNlled:
- You shis from transmission position ].
or
208Driving and parking