2021 MERCEDES-BENZ B-CLASS HATCHBACK Owners Manual

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions #
Switch o. theve hicle. #
Add 1 l of engine oil (/ page 340). #
Check the engine oil le vel.
No tes on engine oil (/ page 401).
00B3
Engine oil pressure Stop
Switch off engine *T
he oil pressure is too lo w.
* N
NO
OTE
TE Engine damage caused bydriving with insu1cient oil pressure #
Avoid driving with insu1cient oil pressure. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Switch o. theve hicle. #
Consult a quali/ed specialist workshop.
00B3
Engine oil level cannot be
measured *T
he elect rical connection tothe oil le vel sensor has been inter rupted or the oil le vel sensor is faulty. #
Consult a quali/ed speciali stwo rkshop. 478 478
Displ
aymessages and warning/indicator lamps

W
W
ar
ar ning and indicat
ning and indicat or lam
or lamps
ps Ov
Ov
er
ervie
vie w of indicat
w of indicat or and w
or and war
arning lam
ning lam ps
ps Some systems will per
form a self-test when the
ve hicle is switched on. Some indicator and warn-
ing lamps may brie0y light up or 0ash. This beha v-
iour is non-critical. These indicator and warning
lamps indicate a malfunction only if they light up
or 0as haTer theve hicle has been star ted or dur-
ing a journe y.
S
S t
tandar
andar d ins
d instr
trument displ ay
ument display W
W
idescr
idescr een coc
een coc kpit ins
kpit instrtrument display
ument display Depending on
the display setting, the positions of
th e indicator lamps on the inst rument display may
di.er from theex ample shown.
Indicat
Indicat or and w
or and w ar
arning lam
ning lam ps:
ps:
0075 Restraint system (/ page 480)
00E9 Seat belt (/ page 480)
_ Reduced po wer (/ page 482)
00D6 System error (/ page 482)
003D Electricalfault (/ page 482)
ï Trailer hitch (/ page 483)
Ù Powe r steering (/ page 483) ÿ
V
V ehicles wit
ehicles wit h a widescr
h a widescr een coc
een cockpit
kpit:
:
coolant temp erature (/ page 484)
00B9 Engine diagnostics (/ page 484)
0028 V
Vehicles wit
ehicles wit h a diesel engine:
h a diesel engine: preglow
003D Electricalfault (/ page 484)
00D4 Reser vefuel wi thfuel /ller 0ap loca-
tion indicator (/ page 484)
0024 Electric parking brake (red)
(/page 488)
0024 Electric parking brake (yellow)
(/page 488)
004D Brakes (yellow) (/ page 488)
004D Brakes (red) (/ page 488)
L Distancewarning (/ page 490)
Ó Active Brake Assist (/ page 490)
ê Active Brake Assist (/ page 490)
0025 ABS (/page 491)
00E5 ESP®
(/ page 491)
00BB ESP®
OFF (/ page 491) Display messages and
warning/indicator lamps
479 479

0077
Tyre pressure monitoring system
(/ page 493)
0060 Standing lights (/ page 138)
0058 Low beam (/ page 138)
0057 High beam (/ page 140)
003E003D Turn signal lights (/ page 140)
005E Rear fog light (/ page 138) Occupant safe
Occupant safe
ty
ty W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
0075
Re straint system warning
lamp *T
he restraint system redwa rning lamp is lit while theve hicle is on.
The restraint system is malfunctioning (/ page 47). &
W
W ARNING
ARNING Risk of injury due tomalfunctions in there straint system
Co mp onents in there straint system ma y be activated unintentionally or not deploy as intended in an accident. #
Have there straint system checked and repaired immediately at a quali/ed specialist workshop. Plug-in h
Plug-in h
ybr
ybrid:
id: 480
480
Displ
aymessages and warning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions &
D
D AN
AN GER
GER Risk of fatal injuries due torestraint system malfunctions
Co mp onents in there straint system ma y be activated unintentionally or not deploy as planned in an accident. In the
eve nt of an accident, the high-voltage on-board electrical system may not be deactivated as intended.
Yo u may su.er an electric shock if youto uch the damaged components of the high-voltage on-board electrical sys-
te m. #
Have there straint system checked and repaired immediately at a quali/ed specialist workshop. #
ATer an accident, switch o. theve hicle immediatel y. #
Drive on carefull y. #
Notethe messages on the instrument displa y. #
Consult a quali/ed specialist workshop immediatel y.
00E9
Seat belt warning lamp
0ashes *T
he red seat belt warning lamp 0ashes and an intermittent warning tone sounds.
The driver or front passenger has not fastened his/her seat belt while theve hicle is in motion. #
Fasten your seat belt (/ page 50).
There are objects on the front passenger seat. #
Remo vethe objects from the front passenger seat. Display messages and
warning/indicator lamps
481
481

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
00E9
Seat belt warning lamp
lights up *T
he red seat belt warning lamp lights up once theve hicle has star ted.
In addition, an intermittent warning tone may sound.
The red seat belt warning lamp reminds the driver and front passenger tofasten their seat belts. #
Fasten your seat belt (/ page 50).
If yo u ha veplaced objects on the front passenger seat, there d seat belt warning lamp may remain lit. Hybr
Hybr
id syst
id syst em
em W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
_
Re duced warning lamp
po wer *T
heyellow reduced-po werwa rning lamp is on.
Drive system po wer output is reduced. #
Notethe messages on the instrument displa y.
00D6
System er rorwa rning lamp *T
he red system er rorwa rning lamp is lit while theve hicle is in a state of operational readiness õ.
There is a malfunction in the drive system. #
Notethe messages on the instrument displa y.482
482
Display message
s andwarning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
003D
Electrical fault warning lamp *T
hered electrical fault warning lamp is lit.
There is a fault with the electrics. #
Notethe messages on the instrument displa y.V
V
ehicle
ehicle W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
Ù
Po we r steering warning
lamp (red) *T
he red po wer steering warning lamp is lit while theve hicle is running.
The po wer assistance or the steering itself is malfunctioning. &
W
WARNING
ARNING Risk of accident if steering capability is impaired
If th e steering does not function as intended, theve hicle's operating saf ety is jeopardised. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and tra1c conditions. Do not
continue driving under any circums tances. #
Consult a quali/ed speciali stwo rkshop. #
Notethe messages on the instrument displa y. Display messages and
warning/indicator lamps
483
483

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
ï
Tr ailer tow hitch warning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational. &
W
W ARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedu reand do not re-couple the trailer until the display message disappears. #
Notethe messages on the instrument displa y.Engine
Engine
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
ÿ
Coolant warning lamp (red) *T
he red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty 484
484
Display message
s andwarning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions
R The engine coolant pump is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120°C. &
W
WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theeve nt of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re service. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. Do not continue driving. #
Notethe messages on the instrument displa y.
If t If t he coolant t
he coolant t em
em per
per atur
atur e displa
e displa y is at t
y is at the low
he lower end of t
er end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Consult a quali/ed specialist workshop.
If t
If t he coolant t he coolant t em
emper
per atur
atur e displa
e displa y is at t
y is at the upper end of t
he upper end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Exit theve hicle and keep a safe distance from it until the engine has cooled down. #
Check the coolant le vel (/ page 342). Display message
s andwarning/indicator lamps
485
485