light MERCEDES-BENZ B-CLASS HATCHBACK 2021 Service Manual

The high beam will switch o. automatically in
the
fo llowing cases:
R Atspeeds below 25 km/h
R Ifot her road users are de tected
R If st reet lighting is su1cient
% The system's optical sensor is located behind
th e windscreen near theove rhead control
panel.
Switc
Switc hing A
hing A dap
daptiv
tive Highbeam Assis
e Highbeam Assist ton/o.
on/o.
Switc
Switc hing on
hing on #
Turn the light switch tothe0058 position. #
Switch on the high beam using the combina-
tion switch.
If Ad aptive Highbeam Assist is activated,
th e00CE indicator lamp will light up on the
cent ral display section of the inst rument dis-
pla y.
Switc Switc hing
hingo.
o. #
Switch o. the high beam using the combina-
tion switch. A
A
dap
dap tiv
tive Highbeam Assis
e Highbeam Assist Plus t Plus A
A
dap
dap tiv
tive Highbeam Assis
e Highbeam Assist Plus function t Plus function &
W
WARNING
ARNING Risk of accident despite Adap-
tive Highbeam Assist Plus
Ad aptive Highbeam Assist Plus does not react
to:
R road users without lights, e.g. pedestrians
R road users with poor lighting, e.g. cyclists
R road users whose lighting is obstructed,
e.g. bya bar rier
On very rare occasions, Adaptive Highbeam
Assist Plus may failto recognise other road
users with their own lighting, or may recognise
th em too late.
In these, or in similar situations, the automatic
high beam will not be deactivated or will be
activated despite the presence of other road
users. #
Always obser vethero ad and tra1c con-
ditions carefully and switch o. the high
beam in good time. Ad
aptive Highbeam Assist Plus cann ottake into
account road, weather or tra1c conditions.
De tection may be restric ted in thefo llowing
cases:
R in poor visibility, e.g. fog, heavy rain or snow
R ifth ere is dirt on the sensors or the sensors
are obscured
Ad aptive Highbeam Assist Plus is only an aid. Yo u
are responsible for adjusting theve hicle's lighting
to the pr evailing light, visibility and tra1c condi-
tions. 144 144
Light and sight

Ad
aptive Highbeam Assist Plus automatically
switches between thefo llowing types of light:
R Low beam
R Partial high beam
R High beam
Pa rtial high beam uses the high beam toshine
past other road users rather than dazzling them. The
vehicle in front will be illuminated bythe low
beam.
At speeds greater than 30 km/h:
R If no other road users are de tected, the high
beam will switch on automaticall y.
R Ifot her road users are de tected, the partial
high beam will switch on automaticall y.
At speeds below 25 km/h or when there is su1-
cient street lighting:
R The high beam will switch o. automaticall y.
R The partial high beam will switch o. automati-
cally.
% The system's optical sensor is located behind
th e windscreen near theove rhead control
panel.
Switc
Switc hing A hing A dap
daptiv
tive Highbeam Assis
e Highbeam Assist Plus t Pluson/o.
on/o.
Switc
Switc hing on
hing on #
Turn the light switch tothe0058 position. #
Switch on the high beam using the combina-
tion switch.
When the high beam is switched on automati-
cally in the dar k, the00CE indicator lamp will
light up on the central display section of the
inst rument displa y.
Switc
Switc hing hingo.
o. #
Switch o. the high beam using the combina-
tion switch. Se
Se
tting t
tting t he e
he ext
xter
er ior lighting
ior lighting switc
switch-o.
h-o. dela
dela y time
y time R
R
eq
eq uir
uir ements:
ements:
R The light switch is in the0058 position.
Multimedia system: 4 © 5
Settings 5
Lights
5 Ext. light. del. sw. off #
Set the swit ch-o. delay time.
When theve hicle engine is switched o., the
ex terior lighting will be activated forth e set
time. Light and sight
145
145

Switc
Switc
hing t
hing t he surr
he surr ound lighting
ound lighting on/o.
on/o. Multimedia system:
4 © 5
Settings 5
Lights
5 Surround lighting
When Surround lighting is active,theex terior
lighting lights up for 40 seconds aTer theve hicle
is unloc ked. When you start theve hicle, the sur-
ro und lighting is deactivated and the automatic
driving lights are activated. #
Activate or deactivate the function. Int
Int
er
er ior lighting
ior lighting A
A
djus
djus ting t
ting t he int
he int er
erior lighting
ior lighting F
F
r
ront ov
ont overerhead contr
head contr ol panel
ol panel 1
003D Front leT reading lamp
2 0033 Automatic interior lighting control
3 004A Front interior lighting
4 0042 Rear interior lighting
5 003D Front right reading lamp #
T
T o switc
o switc h
hon/o.:
on/o.: press but ton1 –5
accordingl y. Contr
Contr
ol panel in t
ol panel in t hegr
he grab handle
ab handle 1
003D Rear reading lamp #
T
To switc
o switc h
hon/o.:
on/o.: press but ton1. A
A
djus
djusting t ting t he ambient lighting
he ambient lighting Multimedia system:
4 © 5
Comfort 5
Ambient lighting
Se
Se tting t
tting t he colour
he colour #
Select Colour. #
Set the desired colour. 146
146
Light and sight

A
A
djus
djus ting t
ting t he br
he br ightness
ightness #
Select Brightness. #
Adjust the brightness.
A
A ctiv
ctiv ating t
ating t he br
he brightness f
ightness f or zones
or zones #
Select Brightness. #
Select Brightness zones. #
Switch the function on or o..
or #
Set the brightness forth e desired zones.
A
A ctiv
ctiv ating multi-colour
ating multi-colour ed lighting
ed lighting #
Select Colour. #
Select Multi-colour. #
Select a colour combination.
A
A ctiv
ctiv ating multi-colour
ating multi-colour ed animation
ed animation #
Select Colour. #
Select Multi-colour animat..
The chosen colour combination will change at
prede/ned inter vals. A
A ctiv
ctiv ating w
ating w elcome lighting
elcome lighting #
Select Colour. #
Select Welcome.
When theve hicle is unloc ked, a special ambi-
ent lighting sequence will run.
A
A ctiv
ctiv ating dependency on air conditioning se
ating dependency on air conditioning se t-
t-
tings
tings #
Select Colour. #
Select Climate .
If ch anges are made tothete mp erature set-
ting in theve hicle, the colour of the ambient
lighting will change brie0y. Switc
Switc
hing t
hing t he int
he inter
erior lighting
ior lighting switc
switch-o.
h-o. delay
delay
time
time on/o.
on/o. Multimedia system:
4 © 5
Settings 5
Lights
5 Int. light. del. sw. off #
Switch the swit ch-o. delay time on or o..
When this function is active, the interior light-
ing lights up for a short time aTer theve hicle
is loc ked. Changing bulbs (onl
Changing bulbs (onl
y f
y for v
or v ehicles wit
ehicles wit h halog
h halogen
en
headlam
headlam ps)
ps) N
No
ot
tes on c
es on c hanging bulbs
hanging bulbs &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts whilst replacing a bulb
Bulbs, lamps and plugs can become very hot
during operation.
When replacing a bulb, you could burn your-
self on these component parts. #
Allow the component parts tocool down
before replacing the bulb. R
Do not use a bulb if it has been dropped or if
its glass has been scratched. The bulb may
otherwise explode.
R Do not touch the glass bulb with your bare
hands.
R Protect bulbs from moisture and do not allow
bulbs tocome into contact with liquids. Light and sight
147 147

Ov
Ov
er
ervie
vie w of t
w of t he bulbs t
he bulbs t o be c
o be c hang
hanged
ed Halog Halog
en headlam en headlam ps
ps 1
High beam: H7 55 W bulb
2 Low beam: H7 55 W bulb T
T
ail lam
ail lam ps
ps 1
Turn signal light: PY 21 W bulb
2 Reversing light: W 16 W bulb Changing t
Changing t
he fr
he front bulbs (v
ont bulbs (v ehicles wit
ehicles with halog
h halogen
en
headlam
headlam ps)
ps) F
F
itting/r
itting/r emo
emoving t
ving t he cov
he cov er in t
er in the fr
he front wheel ar ch
ont wheel ar ch
R
R eq
eq uir
uir ements:
ements:
R The lighting system is switched o..
R The appropriate front wheel is turned in wards. 148
148
Light and sight

#
T
To r
o r emov
emov e:
e:turn co ver1 tothe leT and
re mo veit from the wheel ar chliner. #
T
To
o /t:
/t: insert co ver1 into the wheel ar chliner
and turn it totheright until it engages.
R
R eplacing light sour
eplacing light sour ces in t
ces in t he halog
he halog en headla mp
en headlamp
R
R eq
eq uir
uir ements:
ements:
R Lo
Low beam:
w beam: an H7 55 W light source is availa-
ble.
R High beam:
High beam: an H7 55 W light source is availa-
ble. 1
Low beam housing co ver
2 High beam housing co ver #
Switch the lighting system o.. #
Remo vethe co ver in the front wheel ar ch
( / page 148). #
Turn there leva nt housing co ver anti-clockwise
and remo veit. #
Turn the soc ket anti-clockwise and remo veit. #
Pull the light source out of the soc ket. #
Inse rtthe new light source into the soc ket
such that the entire base of the light source is
re sting on the bottom of the soc ket. #
Inse rtthe soc ket and turn it clockwise. #
Press on the housing co ver and turn it cloc k-
wise. #
Replace the co ver in the front wheel ar ch
( / page 148). Changing t
Changing t
he r
he rear bulbs (v
ear bulbs (v ehicles wit
ehicles with halog
h halogen
en
headlam
headlam ps)
ps) R R
eplacing t
eplacing t he t
he t ail lam
ail lam p bulbs
p bulbs #
Due totheir locations, ha vethe bulbs forthe
turn signal light and reve rsing light changed at
a qu ali/ed specialist workshop. W W
indscr
indscr een wiper
een wiper s and windscr
s and windscr een w
een washer sy
asher sy s-
s-
t
t em
em Switc
Switc
hing t
hing t he windscr
he windscr een wiper
een wipers
son/o.
on/o. 0047
005AWindsc reen wipers o.
0048 0062 Automatic wiping, normal
0049 0063 Automatic wiping, frequent Light and sight
149
149

004A
00AA Continuous wiping, slow
004B 00A9 Continuous wiping, fast #
Turn the combination switch tothe cor re-
sponding position 0047-004B. #
Single wipe/w
Single wipe/w ashing:
ashing:pushthe button on the
combination switch in the direction of ar row
1 .
R 00D3 Single wipe
R 00D4 Wiping with washer 0uid
% Obser vethe no tes on washing theve hicle in a
car wash (/ page 343). Switc
Switc
hing t
hing t he r
he rear windo
ear windo w wiper
w wiperon/o.
on/o. 1
00E2 Single wipe/ washing
2 00C5 Intermittent wiping #
Single wipe:
Single wipe: press button 1tothe point of
re sis tance. #
W
W iping wit
iping wit h w
h washer
asher 0uid:
0uid:press button 1
be yond the point of resis tance. #
Switc
Switc hing int
hing int er
ermitt
mitt ent wiping
ent wiping on/o.:
on/o.:press
button 2.
The 00C5 symbol will appear on the inst ru-
ment cluster when there ar wind owwiper is
switched on. R R
eplacing t eplacing t he windscr
he windscr een wiper blades
een wiper blades &
W
WARNING
ARNING Risk of becoming trapped if the
windscreen wipers are switched on while
wiper blades are being replaced
If th e windscreen wipers begin tomo vewhile
yo u are changing the wiper blades, you can be
trapped bythe wiper arm. #
Always switch o. the windscreen wipers
and vehicle before changing the wiper
blades. Mo Mo
ving t
ving t he wiper ar
he wiper ar ms int
ms into t
o the r
he r eplacement posi-
eplacement posi-
tion
tion #
Switch theve hicle on and then o. again
immediatel y. 150
150
Light and sight

#
Within around 15 seconds, press and hold the
00D4 button on the combination switch for
appr oximately thre e seconds (/ page 149).
The wiper arms will mo veinto there placement
position.
R
R emo
emo ving t
ving t he wiper blades
he wiper blades #
Foldthe wiper arms away from the wind-
screen. #
Hold the wiper arm with one hand. With the
ot her hand, turn the wiper blade away from
th e wiper arm in the direction of ar row 1 as
fa r as it will go. #
Slide catch 2inthe direction of ar row 3
until it engages in there mo val position. #
Remo vethe wiper blade from the wiper arm in
th e direction of ar row 4. F
F
itting t
itting t he wiper blades
he wiper blades #
Insert the new wiper blade into the wiper arm
in the direction of ar row 1. #
Slide catch 2inthe direction of ar row 3
until it engages in the locking position. #
Make sure that the wiper blade is seated cor-
re ctl y. Light and sight
151
151

#
Foldthe wiper arms back onto the wind-
screen. #
Switch on theve hicle. #
Press the00D4 button on the combination
switch (/ page 149).
The wiper arms will return totheir original
positions. #
Switch o. theve hicle.
% Check the condition of the wiper blades regu-
lar lyand replace them in theev ent of visible
damage or ongoing smearing. Maint
Maint enance display
enance display #
Remo veprotective /lm 1from the mainte-
nance displa yson the tips of the ne wly/tted
wiper blades.
When the colour of the maintenance displa ys
ch anges from black toyello w, replace the wiper
blades. %
The duration until the colour changes varies
depending on the usage conditions. R
R
eplacing t
eplacing t he r
he rear windo
ear windo w wiper blade
w wiper blade &
W
WARNING
ARNING Risk of becoming trapped if the
windscreen wipers are switched on while
wiper blades are being replaced
If th e windscreen wipers begin tomo vewhile
yo u are changing the wiper blades, you can be
trapped bythe wiper arm. #
Always switch o. the windscreen wipers
and vehicle before changing the wiper
blades. R R
emo emo ving t
ving t he wiper blade
he wiper blade #
Switch theve hicle o.. 152
152
Light and sight

#
Fold wiper arm 2awa y from there ar wind ow
until it engages in there placement position. #
Unclip wiper blade 1from wiper arm 2and
re mo veit in the direction of ar row 3. F
F itting t
itting t he wiper blade
he wiper blade #
Position wiper blade 1with bo thlugs 3on
holder 2onthe wiper arm. #
Push wiper blade 1inthe direction of ar row
4 until it engages in holder 2. #
Make sure that wiper blade 1is seated cor-
re ctl y. #
Foldthe wiper arm from there placement posi-
tion back onto there ar wind ow. Mirr
Mirr
ors
ors Oper
Oper
ating t
ating t he outside mirr
he outside mirr ors
ors &
W WARNI NG
ARNI NGRisk of accident due toadjust-
ing theve hicle settings while theve hicle is
in motion
Yo u could lose control of theve hicle in thefo l-
lowing situations in particular:
R ifyo u adjust the driver's seat, the head
re straint, the steering wheel or the mir ror
while theve hicle is in motion
R ifyo ufa sten your seat belt while theve hi-
cle is in motion #
Before starting theve hicle: in particular,
adjust the driver's seat, head restraint,
stee ring wheel and mir ror,and fasten
yo ur seat belt. Light and sight
153 153