MERCEDES-BENZ B-CLASS HATCHBACK 2022 Owners Manual

Page 491 of 541

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 490)

Page 492 of 541

Driving systems
/
Distance warning (  pag e 499)

Page 493 of 541

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 48). &
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. Plug-in hybrid:
&
DANGER Risk of f
atal injuries due to restraint system malfunctions
Components in the restraint system may be activated unintentionally or not deploy as planned in an accident. In the
e
vent of an accident, the high-voltage on-board electrical system may not be deactivated as intended.
You may suMer an electric shock if you touch the damaged components of the high-voltage on-board electrical sys-
tem. 
Have the restraint system checked and repaired immediately at a q
ualiNed specialist workshop. 
Aser an accident, switc
h oM the vehicle immediately. 
Drive on carefully. 
Note the messages on the instrument display. 
Consult a q
ualiNed specialist workshop immediately.490
Display messages and warning/indicator lamps

Page 494 of 541

Warning/indicator lamp Possible causes/consequences and
P Solutions

Page 495 of 541

Warning/indicator lamp Possible causes/consequences and
P Solutions
Ú
Sy stem error warning lamp * The red system error warning lamp is lit while the vehicle is in a state of operational readiness

Page 496 of 541

Warning/indicator lamp Possible causes/consequences and
P Solutions
Consult a qualiNed specialist workshop. 
Note the messages on the instrument display.
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. Display messages and warning/indicator lamps
493

Page 497 of 541

Engine
Warning/indicator lamp Possible causes/consequences and
P Solutions

Page 498 of 541

Warning/indicator lamp Possible causes/consequences and
P Solutions
Note the messages on the instrument display.
If the coolant temperature display is at the lower end of the temperature scale: 
Consult a qualiNed 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 350). 
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.

Page 499 of 541

Warning/indicator lamp Possible causes/consequences and
P Solutions

Page 500 of 541

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
497

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