2022 MERCEDES-BENZ GLB SUV Owners Manual

Display messages
Possible causes/consequences and P Solutions 
Switch oM the vehicle. 
Add 1 l of engine oil (  pag
e 321). 
Check the engine oil level.
Notes on engine oil ( pag
e 380).

Warning and indicator lamps
Overview of indicator and warning lamps
Some systems will perform a self-test when the
v
ehicle is switched on. Some indicator and warn-
ing lamps may brieOy light up or Oash. This behav-
iour is non-critical. These indicator and warning
lamps indicate a malfunction only if they light up
or Oash aser the vehicle has been started or dur-
ing a journey.
Standard instrument display Widescreen cockpit instrument display
Depending on the display settings, the positions
of t

he indicator lamps on the instrument display
may diMer from the example shown.
Indicator and warning lamps
Occupant safety
6 Restraint system ( pag
e 449)

Driving safety systems
%
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.