MERCEDES-BENZ GLB SUV 2022 Owners Manual

Driving safety systems
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ABS ( page 458)

Occupant safety
Warning/indicator lamp Possible causes/consequences and
P Solutions
6
R estraint system warning
lamp * The restraint system red warning lamp is lit while the vehicle is on.
The restraint system is malfunctioning ( pag e 44). &
WARNING Risk of injur
y due to malfunctions in the restraint system
Components in the restraint system may be activated unintentionally or not deploy as intended in an accident. 
Have the restraint system checked and repaired immediately at a q
ualiNed specialist workshop. 
Drive on carefully. 
Note the messages on the instrument display. 
Consult a q
ualiNed specialist workshop immediately.

Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
ï
T railer tow hitch warning
lamp * The red trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
WARNING Risk of an accident if t
he ball neck is not locked
The trailer may become detached. 
Stop the vehicle immediately in accordance with the tr
aPc conditions. Do not continue driving. 
Uncouple the trailer and secure it against rolling away. 
Initiate a new swivelling procedure and do not re-couple the trailer until the display message disappears. 
Note the messages on the instrument display. Engine
Warning/indicator lamp Possible causes/consequences and
P Solutions

Warning/indicator lamp Possible causes/consequences and
P Solutions
= The engine coolant pum p is faulty
If there is an additional warning tone, the coolant temperature has exceeded 120°C. &
WARNING Risk of bur
ns when opening the bonnet
If you open the bonnet in the event of an overheated engine or Nr
e in the engine compartment, the following situa-
tions may occur:
= You may come into contact with hot gases.
= You may come into contact with other escaping hot operating Ouids.
Before opening the bonnet, allow the engine to cool down. 
In the event of a Nr
e in the engine compartment, keep the bonnet closed and call the Nre service. 
Stop immediately in accordance with the tr
aPc conditions and switch oM the vehicle. Do not continue driving. 
Note the messages on the instrument display.
If the coolant temperature display is at the lower end of the temperature scale: 
Consult a q
ualiNed specialist workshop.
If the coolant temperature display is at the upper end of the temperature scale: 
Exit the vehicle and keep a safe distance from it until the engine has cooled down. 
Check the coolant level (  pag
e 322).452
Display messages and warning/indicator lamps

Warning/indicator lamp Possible causes/consequences and
P Solutions
Make sure that the air supply to the radiator is not obstructed. 
Avoiding high loads on the engine, drive to the nearest q ualiNed specialist workshop. In doing so, ensure that the
coolant temperature display remains below 120°C.

Warning/indicator lamp Possible causes/consequences and
P Solutions
=
Electr ical fault warning lamp * The red electrical fault warning lamp is lit.
There is a fault in the electrics. 
Note the messages on the instrument display.

Brakes
Warning/indicator lamp Possible causes/consequences and
P Solutions
$
Electr ic parking brake indi-
cator lamp (red)
$
Electric parking brake indi-
cator lamp (yellow) * The red electric parking brake indicator lamp
Oashes or is lit.
The y
ellow electric parking brake indicator lamp is also lit in the event of a malfunction. 
Note the messages on the instrument display.
M
Br
ake system warning lamp
(yellow) * The yellow brake warning lamp is lit while the vehicle is running. &
WARNING Risk of an accident due t o a brake system malfunction
If the brake system is malfunctioning, braking characteristics may be impaired. 
Drive on carefully. 
Have the brake system checked immediately at a q
ualiNed specialist workshop. 
Adjust your speed and drive on carefully, leaving a suitable distance to the vehicle in front. 
If the instrument display shows a display message, observe it. Display messages and warning/indicator lamps
455

Warning/indicator lamp Possible causes/consequences and
P Solutions
Consult a qualiNed specialist workshop.
M
Br
ake system warning lamp
(red) * The red brake warning lamp is lit while the vehicle is running.
Possible causes:
= The br
ake force boosting is malfunctioning and the braking characteristics may be aMected.
= There is insuPcient brake Ouid in the brake Ouid reservoir. 
Note the messages on the instrument display. &
WARNING Risk of accident and injur
y if brake force boosting is malfunctioning
If brake force boosting is malfunctioning, increased brake pedal force may be necessary for braking. The braking
c
haracteristics may be impaired. The braking distance can increase in emergency braking situations. 
Stop in a safe location immediately. Do not continue driving! 
Consult a q
ualiNed specialist workshop. &
WARNING Risk of an accident due t
o low brake Ouid level
If the brake Ouid le
vel is too low, the braking eMect and the braking characteristics may be impaired. 
Stop the vehicle as soon as possible, paying attention to road and tr
aPc conditions. Do not continue driving. 
Consult a q
ualiNed specialist workshop. 
Do not top up the brake Ouid.456
Display messages and warning/indicator lamps

Driving systems
Warning/indicator lamp Possible causes/consequences and
P Solutions
/
W arning lamp for distance
warning function * The red distance warning lamp lights up while the vehicle is in motion.
The distance to the vehicle in front is too small for the speed selected.
If t here is an additional warning tone, you are approaching an obstacle at too high a speed. 
Be prepared to brake immediately. 
Increase the distance.
Function of Active Brake Assist (  pag
e 224).