MERCEDES-BENZ GLB 2023 Owners Manual

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 it at idle speed.Connect the negative terminal of the donor
battery and ground point 3 of your own vehi-
cle 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 in your own vehicle, e.g. the rearwindow defroster or lighting.
When the starting assistance/charging process is complete:
First, remove the jumper cables/charging
cables from ground point 3 and the negative
terminal of the donor battery, then from posi-
tive contact 2 and the positive terminal ofthe donor battery. Begin each time with the
contacts on your own vehicle Nrst.Aser removing the jumper cables/charging
cables, 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 305).
Mercedes-Benz recommends that you have the
12 V battery replaced at a qualiNed specialist
workshop, e.g. at an authorized Mercedes-Benz Center.
Observe the following notes if you want to replace
the battery yourself:
= Always replace a faulty battery with a battery
that meets the speciNc vehicle requirements.
The vehicle is equipped with a Oeece battery.
Full vehicle functionality is only guaranteed with a Oeece battery. For safety reasons,
Mercedes-Benz recommends that you only
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use batteries which have been tested and
approved for your vehicle by Mercedes-Benz.
= Use detachable parts such as the vent hose,
elbow Ntting or terminal cover from the bat-
tery that is to be 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 permitted towing methods (not plug-
in hybrid)
Permitted towing methods Mercedes-Benz recommends transporting your vehicle in the case of a breakdown, rather than towing it away.
For towing with both axles on the ground, use atow rope or tow bar. Do not use tow bar systems.&WARNING Risk of accident when towing
with steering wheel locking
When the steering wheel locking is engaged,
you can no longer steer the vehicle.
Always switch on the vehicle when tow-
ing with a tow rope or tow bar.*NOTE Damage to the vehicle due to tow-
ing away incorrectlyObserve the instructions and notes on
towing away.Vehicles with automatic transmissionBoth axles on
the groundYes, for a maximum of
31 miles (50 km) at 31 mph
(50 km/h)Front axle
raisedYes, for a maximum of
31 miles (50 km) at 31 mph
(50 km/h)Rear axle
raisedYes, for a maximum of
31 miles (50 km) at 31 mph
(50 km/h)4MATIC vehiclesBoth axles on
the groundYes, for a maximum of
31 miles (50 km) at 31 mph
(50 km/h)Front axle
raisedNoRear axle
raisedNo310Breakdown assistance

Towing with a raised axle: towing should be per-
formed by a towing company.
Towing the vehicle with both axles on the ground
Observe the notes on the permitted towing methods.Make sure that the battery is connected and
charged.
Observe the following points when the battery is
discharged:
= the vehicle cannot be started.
= the electric parking brake cannot be released
or applied
= Vehicles with automatic transmission: the
transmission cannot be shised to position \\
or ] .
\bVehicles with automatic transmission: if the
transmission cannot be shised to position \\
or if the display does not show anything,
transport the vehicle (  page 312). A towing
vehicle with lising equipment is required for
vehicle transportation.*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.
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 ortowed away exceeds the permissible
gross mass.If a vehicle has to be tow-started or towed away, its permissible gross mass must not exceed thepermissible gross mass of the towing vehicle.Information on the permissible gross mass of
the vehicle can be found on the vehicle identi-
Ncation plate ( page 352).Vehicles with automatic transmission: do not
open the driver\bs door or front passenger
door; the transmission otherwise automati-
cally shiss to position ].Install the towing eye (  page 313).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.Deactivate the automatic locking mechanism .Do not activate the HOLD function.Breakdown assistance311

Deactivate the tow-away alarm ( page 91).Deactivate Active Brake Assist (  page 203).Vehicles with automatic transmission: shis to
position \\.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.*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 311).Connect the towing device to the towing eye
in order to load the vehicle.Vehicles with automatic transmission: shis the
automatic transmission to position \\.\bVehicles with automatic transmission: the
automatic transmission may be locked in posi- tion ] in the event of damage to the electri-cal system. To shis to \\, supply the on-
board electrical system with power
(  page 308).Load the vehicle onto the transporter.Vehicles with automatic transmission: 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 adaptive damping adjustment
&WARNING Risk of an accident when trans-
porting vehicles with adaptive damping
adjustment
When transporting vehicles with adaptive
damping adjustment, the vehicle/trailer com-
bination 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.312Breakdown assistance

*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.
4MATIC vehicles/vehicles with automatic trans-
mission
Make 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
The towing eye is under the cargo Ooor.
Depending on the vehicle version, the towing eye
may be located in a diMerent position in the cargo
compartment.
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.Breakdown assistance313

Aser removing the towing eye, snap cover 1
into the bumper.*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
engine compartment (  page 315).
*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.314Breakdown assistance

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 315)
= Fuse box in the front passenger footwell
(  page 316)
= Fuse box in the center of the cargo compart-
ment (  page 317)
Opening and closing the fuse box in the engine
compartment
Requirements: = A dry cloth and a screwdriver are available.
Observe the notes on electrical fuses
(  page 314).
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 thewiper linkage.
Always switch oM the windshield wipers
and vehicle before opening the hood.Open the hood.Remove any existing moisture from the fuse
box using a dry cloth.Loosen screws 1.Press clips 2 and lis the fuse box lid up and
out.
The fuse assignment diagram is in a recess on the
side of the fuse box.
Breakdown assistance315

ClosingCheck whether the seal is positioned correctly
in the lid.Place the lid on the fuse box.Make sure that clips 2 engage.Tighten screws 1.Close the hood.
Opening and closing the fuse box in the front
passenger footwell
Observe the notes on electrical fuses
(  page 314).
OpeningLis carpet 1 in the direction of the arrow.Loosen screws 2 and remove the fuse box
lid from the top.
Closing
Place the lid on the fuse box.Tighten screws 2.Fold back the carpet.316Breakdown assistance

Opening and closing the fuse box in the cargo
compartment
Observe the notes on electrical fuses
(  page 314).
Open the cargo Ooor.
Fuse box 1 is located underneath the cargo
Ooor.
Breakdown assistance317

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: