2021 MERCEDES-BENZ B-CLASS HATCHBACK battery

A side windo
A side windo
w canno
w canno t be closed and y
t be closed and y ou cannot
ou cannot
see t
see t he cause.
he cause. #
Che cktosee whe ther any objects are in the
wind owguide. #
Adjust the side windo ws.
A
A djus
djus ting t
ting t he side window
he side window s
s
If a side window is obstructed during closing and
re opens again immediatel y:#
Immediately aTer this, pull and hold the cor re-
sponding button again until the side window
has closed and hold the button for at least one
more second (re-adjustment).
The side window will be closed without the
automatic reve rsing function.
If th e side window is obstructed again and
re opens again immediatel y:#
Immediately aTer this, pull and hold the cor re-
sponding button again until the side window
has closed and hold the button for at least one
more second (follo w-up adjustment).
The side window will be closed without the
automatic reve rsing function. The side window The side window
s canno
s cannot be opened or closed
t be opened or closed
using t
using t he conv
he conv enience opening f
enience opening f eatur
eatur e.
e.
Po ssible causes:
R The key battery is weak or dischar ged. #
Check the battery using the indicator lamp
(/ page 81). #
Replace theke y batter y,if necessary
(/ page 83). Sliding sunr
Sliding sunr
oof
oof Opening and closing t
Opening and closing t
he sliding sunr
he sliding sunroof
oof %
The term "sliding sunroof" also refers to the
panorama sliding sunroof. &
W
WARNING
ARNING Risk of becoming trapped when
th e sliding sunroof is being opened and
closed
Body parts may become trapped in thera nge
of mo vement. #
During opening and closing, make sure
th at no body parts are in thera nge of
mo vement. #
Release the button immediately if some-
body becomes trapped.
or #
Brie0y press the button in any direction
during automatic operation.
The opening or closing process will be
stopped. &
W WARNING
ARNING Risk of entrapment if the slid-
ing sunroof is operated bychildren
Children operating the sliding sunroof could
get caught in the moving parts, particular lyif
unattended. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. 98
98
Opening and closing

Ext
Ext
er
erior lighting
ior lighting N
No
ot
tes on c
es on c hanging t
hanging t he lights when dr
he lights when dr iving abr
iving abroad
oad It is not necessary
toadjust the headlamps. The
legal requ irements are also met in countries in
which tra1c drives on theot her side of thero ad. Inf
Inf
or
ormation about lighting syst
mation about lighting syst ems and y
ems and your
our
r
r esponsibility
esponsibility The
various lighting systems of theve hicle are
only aids. The driver of theve hicle is responsible
fo r cor rect vehicle illumination in accordance with
th e pr evailing light and visibility conditions, legal
re qu irements and tra1c situation. Light switch
Light switch
Oper
Oper
ating t
ating t he light switch
he light switch 0047
0063 LeT-hand parking lights
0048 0064 Right-hand parking lights
0049 0060 Standing lights and licence plate light-
ing
004A 0058 Automatic driving lights (prefer red light
switch position) 004B
0058 Low beam/high beam
6 005E Switches there ar fog light on/o.
When low beam is activated, the0060 indicator
lamp forth e standing lights will be deactivated
and replaced bythe0058 low- beam indicator
lamp. #
Always park your vehicle safely using su1cient
lighting, in accordance with there leva nt legal
stipulations.
* N
NOOTE
TE Battery dis charging byoperating the
standing lights Operating
the standing lights over a period of
hours puts a strain on the batter y. #
Where possible, switch on theright 0064
or leT 0063parking light. Fo
rve hicles that are wider than 2 m or lon ger
th an 6 m,single-sided parking lighting is not per-
mitted in some countries. In this case, the stand-
ing lights are also switched on in the parking
lights position. 138
138
Light and sight

If
th e battery is insu1cient lych arge d, the stand-
ing lights or parking lights will be switched o.
automatically tofacilitate the next engine start.
The exterior lighting (e xcept standing and parking
lights) will switch o. automatically when the driv-
er's door is opened.
R Obser vethe no tes on sur round lighting
(/ page 146).
A
A ut
ut omatic dr
omatic dr iving lights function
iving lights function
When theve hicle is switched on, the standing
lights, low beam and daytime running lights are
switched on automatically depending on the light
conditions. &
W
WARNING
ARNING Risk of accident when the
dipped beam is switched o. in poor visi-
bility
When the light switch is set to0058 ,the
dipped beam may not be switched on auto-
matically if there is fog, snow or other causes
of poor visibility such as spr ay.#
In such cases, turn the light switch to
0058 . The automatic driving lights are only an aid.
Yo u
are responsible forve hicle lighting.
Switc Switc hing t
hing t he r
he rear f
ear f og lights on or
og lights on or o.
o.
R
R eq
eq uir
uir ements:
ements:
R The light switch is in the0058 or0058 posi-
tion. #
Press the 005E button.
Please obser vethe count ry-speci/c la wsonthe
use of rear fog lamps.
R
R egulating headlam
egulating headlam p r
p rang
ang e (halog
e (halog en headlam
en headlam ps)
ps)
The headla mprange adjuster all owsyo uto adjust
th e cone of light from the headlamps in relation to
th eve hicle's load condition. 005A
Driver's seat and front passen ger seat occu-
pied
0047 Driver's seat, front passenger seat and rear
seats occupied
0048 Driver's seat, front passen ger seat and rear
seats occupied, load compartment laden
0049 Driver's seat and front passen ger seat occu-
pied and maximum permissible rear axle load
utilised Light and sight
139
139

&
W
WARNI NG
ARNI NGRisk of accident due tomis-
judgement of distance when using the
outside mir ror
The outside mir rors re0ect objects on a
smaller scale. The objects in vi eware in fact
closer than they appear. #
Therefore, alw ays look overyo ur shoul-
der in order toensure that you are aware
of the actual distance between you and
th ero ad users driving behind you. #
T To f o f old in or out:
old in or out: brie0y press button 2. #
T
T o set: o set: press button 1or3 toselect the
outside mir rorto be adjus ted. #
Use button 4toadjust the position of the
mir ror glass.
% Ifth e battery has been disconnected or com-
ple tely dischar ged, you will ha vetoreset the outside mir
rors. Only then will the automatic
mir rorfo lding function workproper ly. #
T
T o r o r eset:
eset: brie0y press button 2.
An outside mir rorth at has been pushed out of
position can be engaged in position again as fol-
lo ws: #
V
Vehicles wit
ehicles wit hout electr
hout electr icall
ically f
y folding outside
olding outside
mirr
mirr or
ors:
s: manually mo vethe outside mir ror into
th e cor rect position. #
V Vehicles wit ehicles wit h electr
h electricall
ically f
y folding outside mir-
olding outside mir-
r
r ors
ors: press and hold button 2.
Yo u will hear a click and the mir ror will audibly
click into place. The outside mir ror will now be
set tothe cor rect position. A
A
ut
ut omatic anti-dazzle mirr
omatic anti-dazzle mirr or
ors function
s function &
W
WARNING
ARNING Risk of acid burns and poison-
ing due tothe anti-dazzle mir ror electro-
ly te
Electrolyte may escape if the glass in an auto-
matic anti-dazzle mir ror breaks. 154
154
Light and sight

It is possible
tomake use of there sidual heat
from the engine tocontinue heating or ventilating
th e front compartment of theve hicle for appr ox-
imately 30 minutes, depending on thete mp era-
ture set. #
T To activ o activ at
ate:
e: press the 0056 button.
Re sidual heat will be switched o. automaticall y.Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control using t
ol using t hekey
he key F
F
unction of pr
unction of pr e-entr
e-entry climat
y climat e contr
e control using t
ol using t he
he
key
key
Before entering theve hicle, the driver's seat area
or the whole vehicle interior can be brie0y pre-
wa rmed or pre-cooled.
When pre-cooling, thefo llowing functions are acti-
va ted as needed:
R Automatic climate control
R Blower
R Seat ventilation
When pre-heating, thefo llowing functions are acti-
va ted as needed:
R Automatic climate control R
Blower
R Seat heater
R Steering wheel heater
R Mirror heater
R Rear wind owheater
Se
Se tting pr tting pr e-entr
e-entry climat
y climat e contr
e control via t
ol via thekey
he key
Multimedia system:
4 Climate menu 5
Pre-entry climate ctrl
Switc
Switc hing
hingon/o.
on/o. #
Select Z. #
Select Pre-entry climate control via key.
Switc Switc hing pr hing pr e-entr
e-entry climat
y climat e contr
e control via t
ol via thekey
he key
on/o.
on/o.
R R eq
eq uir
uir ements:
ements:
R The high-voltage battery is charge d su1-
cient ly.
R The function has been activated via the multi-
media system. #
T
To switc
o switc h on:
h on: unlock theve hicle.
The climate cont rol functions are activated for
up to/ve minutes for pre-heating and pre-
cooling.
Pre-entry climate control via theke y cann otbe
activated more than twice when theve hicle is
switched o.. #
T
To switc
o switc h
h o.:
o.: push the003B button up or
down.
The following functions will remain active once the
ve hicle has been star ted:
R Seat heating
R Seat ventilation 160
160
Climate cont
rol

Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control at depar
ol at depar tur
ture time
e time Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control f
ol for depar
or depar tur
ture time func-
e time func-
tion
tion &
W
W ARNI NG
ARNI NGRisk of fatal injury due toexpo-
sure toextreme heat or cold in theve hicle
If persons, particular lych ildren, are subjected
to prolonged exposure tointense heat or cold,
th ere is a risk of se vere injury or even death. #
Never lea vepersons, particular lych il-
dren, unattended in theve hicle. The
vehicle interior can be air conditioned when
th eve hicle is par ked.
When theve hicle is connected topowe r supply
equipment, priority is given tocharging the high-
vo ltage battery toa speci/ed minimum charge.
The running time of pre-entry clima tecont rol may
be reduced under thefo llowing conditions:
R The vehicle is not connected topowe r supply
equipment.
R The high-voltage battery is not charge d su1-
cient ly. Wi
th active pre-ent ryclimate cont rol,th ech arge
le ve l of the high-voltage battery may be reduced,
ev en if thech arging cable connector is connec-
te d.
Fo r cooling, thefo llowing functions are activated
as needed:
R Automatic climate control
R Blower
R Seat ventilation
Fo r heating, thefo llowing functions are activated
as needed:
R Automatic climate control
R Blower
R Seat heating
R Steering wheel heater
R Mirror heater
R Rear wind owheater Se
Se tting pr
tting pr e-entr
e-entry climat
y climat e contr
e contr ol f
ol for depar
or depar ture
ture
time
time
Multimedia system:
4 Climate menu 5
Pre-entry climate ctrl
Se Se tting a single depar
tting a single depar tur
ture time
e time #
Select ONCE. #
Set a departure time.
Changing t
Changing t he activ
he active depar
e departur
ture time
e time #
Select the pen icon next tothe displa yed
departure time. #
Set a departure time.
Se
Se tting t
tting t he w
he week
eekpr
pro/le
o/le #
Select WEEK PROFILE . #
Set the desired departure times, e.g. every
day at 8 a.m.
Selecting t
Selecting t he zone
he zone #
Select Z. Climate control
161
161

#
Select Driver's seat only.
If th eDriver's seat only setting is deactivated,
pre-entry climate control take s place forthe
entire vehicle.
A
A ctiv
ctiv ating/deactiv
ating/deactiv ating pr
ating pre-entr
e-entry climat
y climat e contr
e contr ol
ol
f
f or depar
or depar tur
tur e time
e time
R
R eq
eq uir
uir ements:
ements:
R The high- voltage battery is charge d su1-
cient ly.
R The function has been activated via the multi-
media system. #
T
To activ
o activ at
ate:
e: set the departure time
(/ page 161).
Pre-entry climate control for departure time
switches on a maximum of 55 minutes before
th e selected departure time. It will remain
active for ano ther /ve minutes if the departure
is dela yed. #
T To deactiv
o deactiv at
ate:
e: push the003B button up or
down.
The following functions will remain active once the
ve hicle has been star ted:
R Seat heating R
Seat ventilation A
A ctiv
ctiv ating/deactiv
ating/deactiv ating immediat
ating immediat e pr
e pre-entr
e-entr y cli-
y cli-
mat
mat e contr
e contr ol
ol &
W
WARNI NG
ARNI NGRisk of fatal injury due toexpo-
sure toextreme heat or cold in theve hicle
If persons, particular lych ildren, are subjected
to prolonged exposure tointense heat or cold,
th ere is a risk of se vere injury or even death. #
Never lea vepersons, particular lych il-
dren, unattended in theve hicle. Air-conditioning of
theve hicle interior can con-
tinue for up to50 minutes, e.g. if the journey is
inter rupted. The colours of
the indicator lamp ha vethefo llo w-
ing meanings:
R Blue: Blue: cooling is activated.
R R
Red:
ed: heating is activated.
R Y
Yello w:
ello w:the departure time has been preselec-
te d. #
Set the desired temp erature using the 0082
button. 162
162
Climate control

Dr
Dr
iving
iving N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrids
ids N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrid oper
id oper ation
ation &
W
WARNING
ARNING Risk ofchemical burns and poi-
soning from damaged high-voltage battery
If th e housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. #
Avoid contact with the skin, eyes or
clo thing. #
Immediate lyrinse electrolyte splashes
o. with water and seek medical atten-
tion straight away. &
D
DAN
AN GER
GER Risk of explosion from excessive
internal pressure of the high-voltage bat-
te ry
Flammable gas may escape and ignite in the
eve nt of a vehicle /re. #
Stop thech arging process immediately
in case of unusual odours, smoke or
burn mar ks. #
Leavethe danger zone immediatel y.
Secure the danger zone at a su1cient
distance. #
Call the /re brigade. The
hybrid system combines a combustion engine
with an electric mo tor.
Characteristics when theve hicle is at a standstill:
R The combustion engine is generally switched
o..
R Idle speed only occurs in cer tain instances.
Characteristics when starting theve hicle:
R Ifth e high-voltage battery is su1ciently
ch arge d, theve hicle can be star ted with the
electric drive without the combustion engine
(noiseless start).
R Ifth e high-voltage battery forth e electrical
drive is not su1ciently charge d or the operat-
ing temp erature of the combustion engine has not been
reached, theve hicle can start with
th e combustion engine.
% Depending on the system, it may happen that
ev en though the high-voltage battery is
ch arge d, electric mode has restric ted or no
av ailabilit y.Once the combustion engine has
been operated for long enough, electric mode
is again available without restriction.
% Tostart the combustion engine, the high-volt-
age battery can be used as a star ter batter y.
Characteristics with moderate po wer output
re qu ests:
R The combustion engine is switched o. as
oTen as possible during the journe y.
R The vehicle can, depending on the drive pro-
gr am selected and the battery charge leve l, be
accelerated electrically up tospeeds of about
140 km/h.
Characteristics with high po wer output requ ests:
R The electric mo tor supports the combustion
engine (boost e.ect), e.g. when pulling away
or accelerating.
R The high-voltage battery is discharging. 166 166
Driving and parking