start stop button MERCEDES-BENZ B-CLASS HATCHBACK 2021 Owners Manual

#
When closing thero ller sunblind, make sure
th at no body parts are in thera nge of mo ve-
ment. &
W
W ARNING
ARNING Risk of becoming trapped
despite reve rsing function
In particular, there ve rsing function does not
re act tosoT, light and thin objects, e.g. /n-
ge rs. #
When closing thero ller sunblind, make
sure that 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 the automatic closing process.
The closing process will be stopped. A
A
ut
ut omatic functions of t
omatic functions of t he sliding sunr
he sliding sunroof
oof %
The term "sliding sunroof" also refers to the
panorama sliding sunroof. The sliding sunroof will be closed automatically
when theve hicle has been switched o. in thefo l-
lowing situations:
R if it starts torain
Ra in is de tected byara in sensor on the wind-
screen.
R inextreme temp eratures
R aTer a cer tain time (depending on the on-
board electrical system voltage)
R ifth ere is a malfunction in the po wer supply
The sliding sunroof will rise at there ar in order to
continue ventilating theve hicle interior.
If th e sliding sunroof is obstructed during an auto-
matic closing procedure, thero of will be opened
again slightl y.The automatic function forth e slid-
ing sunroof and the side windo wswill then be
deactivated.
R
R ain-closing f ain-closing f eatur
eature when dr
e when dr iving
iving
V
V ehicles wit
ehicles wit h a panor
h a panorama sliding sunr
ama sliding sunr oof:
oof:if it
starts torain, thera ised sliding sunroof will auto-
matically be lo wered while theve hicle is in
motion. A
A
ut
ut omatic low
omatic low er
ering function
ing function
V
V ehicles wit
ehicles wit h a panor
h a panorama sliding sunr
ama sliding sunr oof:
oof:ifthe
sliding sunroof is raised at there ar, it will auto-
matically be lo wered slightly at higher speeds. At
low speeds, it will be raised again automaticall y. &
W
WARNI NG
ARNI NGRisk of becoming trapped by
automatic lo wering of the sliding sunroof
At higher speeds, thera ised sliding sunroof
will automatically be lo wered slightly at the
re ar. #
Make sure that nobody reaches into the
sliding sunroof's range of mo vement
while theve hicle is in motion. #
If somebody becomes trapped, brie0y
push the sliding sunroof button forw ards
or backwards. %
By pushing or pulling the0057 button, you
can inter rupt the automatic functions "Rain
closing function when driving" and "Automatic
lo we ring". Opening and closing
101 101

R
aTer pressing the start/s top button with the
ke y in the st owage compartment
(/ page 170)
R aTer unlocking theve hicle using KEYLESS-GO
R when using HANDS-FREE ACCESS
Information on collision de tection on a par ked
ve hicle (/ page 221). Pr
Pr
iming/deactiv
iming/deactiv atingtow
ating tow-awa
-a wa y pr ot
y pr otection
ection Multimedia system:
4 © 5
Settings 5
Quick access #
Prime or deactivate Tow-away protection.
To w- awa y protection is primed again in thefo llo w-
ing cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select theVehi-
cle submenu in theSettings main menu to
prime or deactivate tow- awa y protection. F
F
unction of int
unction of int er
erior pr ot
ior pr otection
ection When interior pr
otection is primed, a visual and
audible alarm is triggered if mo vement is de tected
in theve hicle interior.
Interior pr otection is primed automatically aTer
appr oximately ten seconds:
R aTer locking theve hicle with thekey
R aTer locking theve hicle using KEYLESS-GO
Interior pr otection is only primed when thefo llo w-
ing components are closed:
R doors
R tailgate
Interior pr otection is automatically deactivated:
R aTer pressing theÜ or008B button on the
key
R aTer pressing the start/s top button with the
ke y in the st owage compartment
(/ page 170)
R aTer unlocking theve hicle using KEYLESS-GO
R when using HANDS-FREE ACCESS The
following situations can lead toafa lse alarm:
R when there are moving objects such as mas-
cots in theve hicle interior
R when a side wind owis open
R when a panoramic sliding sunroof is open Pr
Pr
iming/deactiv
iming/deactiv ating int
ating inter
erior pr ot
ior pr otection
ection Multimedia system:
4 © 5
Settings 5
Quick access #
Prime or deactivate Interior motion sensor .
Interior pr otection is primed again in thefo llowing
cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select theVehi-
cle menu under Settingstoprime or deacti-
va te interior pr otection. 104 104
Opening and closing

R
The symbol 00D5(yellow) appears when the
ve hicle is at a standstill: Not all vehicle condi-
tions for an engine stop ha vebeen met.
R Neither the symbol 00D6nor00D5 appears
when theve hicle is at a standstill: An intelli-
ge nt stop inhibitor was de tected, e.g. a stop
sign.
R The symbol sappears: The ECO start/
stop function is deactivated or there is a mal-
function.
If th e engine was switched o. bythe ECO start/
stop function and you lea vetheve hicle, a warning
to ne sounds and the engine is not restar ted. In
addition, the display message Vehicle is opera-
tional Switch off ignition before exiting appears
in the inst rument displa y.Ifyo u do not switch o.
th eve hicle, it is automatically switched o. aTer
th re e minutes. Deactiv
Deactiv ating or activ
ating or activ ating t
ating the EC
he ECO st
O star
art/st
t/st op
op
function
function #
Press button 1.
A display appears in the inst rument clus ter
when switching the ECO start/s top function
o./on.
% A continuous sdisplay appears in the
inst rument cluster while the ECO start/s top
function is deactivated. EC
EC
O displa
O displa y function
y function The ECO display summarises
your driving charac-
te ristics from the start of the journey toits com-
pletion and assists you in achieving the most eco-
nomical driving style.
Yo u can in0uence consum ption bydoing thefo l-
lowing:
R driving with particular care.
R V
V ehicles wit ehicles wit h aut
h aut omatic tr
omatic tr ansmission:
ansmission: driving
in drive prog ram ;.
R V Vehicles wit ehicles wit h manual tr
h manual tr ansmission:
ansmission: driving in
drive prog ram A.
R following thege arshiT recommendations. Driving and parking
177
177

#
Press DYNAMIC SELECT button 2.
The DYNAMIC SELECT menu appears in the
inst rument displa y. #
Press DYNAMIC SELECT button 2again.
The chosen drive prog ram appears. Con/gur
Con/gur
ing
ingD
DYN
YNAMIC SELECT (multimedia sy AMIC SELECT (multimedia sy s-
s-
t
t em)
em) Multimedia system:
4 © 5
Settings 5
Vehicle
5 DYNAMIC SELECT
Se
Se tting dr
tting dr iv
ive pr
e pr ogr
ogram I
am I #
Select Individual configuration . #
Select and set a categor y.
Switc
Switc hing t
hing t he r
he rest
estor
oration displa
ation displa y on or
y on oro.
o. #
Switch Ask when starting on or o..
F
F unction on:
unction on: the next time theve hicle is star ted a
prom ptappears asking whe ther the last active
drive prog ram should be restored.
F
F unction on:
unction on: the next time theve hicle is star ted a
prom ptappears asking whe ther the last active
drive prog ram should be restored. If the ECO
start/s top function was deacti vated, an additional
prom ptappears asking if the function should
re main deactivated. %
The prom ptappears only if the pr eviously
active settings deviate from the standard set-
tings.
F
F unction
unction o.:
o.:the next time theve hicle is star ted
th eA drive prog ram is set automaticall y.The
ECO start/stop function is activated automati-
call y.
F F unction unction o.:
o.:ifth eÎ drive prog ram wa sthe
last one active, and all requ irements forth e drive
prog ram are ful/lled, this will be automatically
selected the next time theve hicle is star ted. If
ano ther drive prog ram wa s active, then theA
drive prog ram is set automaticall y.
% This function must be activated for each user
pro/le separatel y.Only when this function is
activated will the drive prog ram and ECO
start/s top setting forth e pr evious journey be
sa vedfo rth ere specti veuser pro/le.
% This function must be activated for each user
pro/le separatel y.The drive prog ram forthe
re specti veuser pro/le of the last driver is only
stored if this function is activated. 184
184
Driving and parking

%
When theve hicle is switched on (the õ
displ ayis lit in the Instrument Display), soc ket
0ap 1cannot be opened. #
Press cat ch7 tothe leT and fold open
soc ket co ver5.
% The CCS charging cable connector requ ires
connections 6and 8. Therefore, it is nec-
essary toopen bo thparts of soc ket co ver5. #
Insert the CCS charging cable connector into
th eve hicle soc ketto the stop.
Make sure that thech arging cable is not taut
when inser ted.
The 003D indicator lamp 4and status dis-
play 30ash orange and, as soon as the high-
vo ltage battery is charge d, green.
When thech arging cable is connected totheve hi-
cle, theve hicle cann otbe star ted or mo ved.
At the start of thech arging process, thech arge
le ve l display is shown in the Instrument Display
with a charging prediction. The charging predic-
tion either refers to the predicted charge leve l at
th e set departure time, or the time at which the
high- voltage battery will be fully charge d. %
Depending on thete mp erature, thefa n and
bat tery cooling system may audibly switch on
during thech arging process.
% Ifth eve hicle is idle for lengt hyperiods and
connected tothe mains suppl y,the high-volt-
age battery will be rech arge d automatically as
needed or when electrical consumers are
activated (e.g. the pre-entry climate control). Ending t Ending t
he dir
he direct curr
ect curr ent c
ent c har
harging pr
ging pr ocess (mode
ocess (mode
4)
4) R
R
eq
eq uir
uir ements:
ements:
R The distance between theke y and theve hicle
does not exceed 1 m. Combo 1 v
Combo 1 v ehicle socket
ehicle soc ket #
Press charging inter ruption button 3.
The charging process is ended. The 0036indi-
cator lamp 1lights up white. The vehicle
soc ket is unloc ked. #
Press and hold button 2onthech arging
cable connector and remo vethech arging
cable connector from theve hicle soc ket. Driving and parking
213
213

ASS
YS
ASS YST PL
T PL US ser
US ser vice int
vice int erv
erval display
al display F
F
unction of t
unction of t he ASSYS
he AS SYST PL
T PL US ser
US ser vice int
vice int erv
erval dis-
al dis-
play
play The ASS
YST PLUS service inter val display on the
inst rument display informs you of the time or dis-
ta nce remaining before the next service due date.
Yo u can hide this service display using the back
button Gonthe leT-hand side of the steering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may shor ten
th e service inter val, e.g. in thefo llowing cases:
R Mainly short-distance driving
R When the engine is oTen leT idling for long
periods
R Intheev ent of frequent cold start phases
R V
V ehicles wit ehicles wit h a diesel par
h a diesel par ticulat
ticulate
e/lt
/lt er:
er: inthe
ev ent of frequently inter rupted rege neration of
th e diesel particulate /lter
Mercedes-Benz recommends avoiding such oper-
ating conditions. Yo
u can obtain information concerning the servic-
ing of your vehicle from a quali/ed specialist
wo rkshop, e.g. a Mercedes-Benz service cent re. Displa
Displa
ying t
ying t he ser
he ser vice due date
vice due date On-board computer:
4 Service 5
ASSYST PLUS
The next service due date is displa yed. #
T
T o e
o e xit t
xit t he displa y:
he displ ay:press the back button
G onthe leT-hand side of the steering
wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 282). Inf
Inf
or
ormation on r
mation on r egular maint
egular maint enance w
enance work
ork *
N
NOOTE
TE Premature wearthro ugh failure to
obser veservice due dates Main
tenance workwhich is not car ried out at
th eright time or inco mplete ly can lead to
increased wear and damage totheve hicle. #
Adhere tothe prescribed service inter-
va ls. #
Always ha vethe prescribed maintenance
wo rkcar ried out at a quali/ed specialist
wo rkshop. N
No
ot
tes on special ser
es on special ser vice r
vice req
equir
uir ements
ements The prescribed service inter
val is based on nor-
mal operation of theve hicle. Ha vethe mainte-
nance workcar ried out more oTen than prescri-
bed if operating conditions are di1cult or the
ve hicle is subject toincreased stress.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsibil-
ity as rega rdsto whe ther maintenance work
needs tobe per form ed more oTen than speci/ed
based on the actual operating conditions and/or
loads.
Examples of arduous operating conditions:
R Regular city driving with frequent intermediate
stops
R Mainly short-distance driving 336 336
Maintenance and care

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences and0050
0050Solutions
Solutions #
Restart theve hicle.
If th e display message still appears: #
Consult a quali/ed specialist workshop. Engine
Engine
Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences and0050
0050Solutions
Solutions
To switch off the engine,
press the Start/Stop but-
ton for at least 3 seconds
or 3 times. *Y
ou ha vepressed the start/s top button while theve hicle is in motion. #
Information about switching o. theve hicle while driving (/ page 169).
Cannot start engine See
Owner's Manual *T
hevehicle cann otbe star ted. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop. 438 438
Displ
aymessages and warning/indicator lamps

Re
duced drive system per form ance
See Owner's Manual.............................. 428
Re versing not poss. Consult workshop ... 443
Risk of vehicle rolling away App ly
parking brake See Owner's Manual ........ 444
Risk of vehicle rolling awayPa rking
brake not applied See Owner's Manual ... 450
Risk of vehicle rolling Driver door
open and transmission not in P .............. 442
Ru n Flat Indica tor inoperative................. 473
Speed limit (winter tyres) XXX km/h .......455
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 454
Speed Limit Assist inoperative................ 454
Te aching in transmission comple te......... 444
Te aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 444
To shiT out of P or N,depress brake
and start engine.................................... .441 To
switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times...................................... 438
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 456
Tr a1c Sign Assist inoperative................. 456
Tr ansmission Malfunction ....................... 443
Tr ansmission Malfunction Stop............... 443
Tr ansmission Malfunction Visit work-
shop ...................................................... 445
Ty re press. monitor cur rently una vaila-
ble......................................................... 469
Ty re press. monitor inoperative .............. 469
Ty re press. monitor inoperative No
wheel sensors ........................................ 470
Ty re pressure Check tyres ...................... 472
Ty re(s) ove rheated .................................. 472
Ve hicle not cur rently being charged
Charging station fault............................. 427
Wi per malfunctioning .............................437 Wi
thout changing gear, consult work-
shop ............................................. .429, 442
Wi thout starting engine again, consult
wo rkshop ............................................... 429
Dist
Dist ance contr ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS DIS TR
TR ONIC ONIC
see Active Distance Assist DISTRONIC
Door
Door Additional door loc k................................. 84
Child saf ety lock (rear door )..................... 78
Locking/unlocking (emer gency key)........ .88
Opening (from inside).............................. .85
Unlo cking (from inside)............................ 85
Door contr
Door contr ol panel
ol panel......................................... 18
Dra
Dra wbar
wbar
see Tow- bar system
Dr
Dr iv
ive Awa
e Away Assi st
y Assi st........................................ .272
Dr
Dr iv
ive position
e position
Engaging................................................ 189
Dr
Dr iv
ive pr
e pr ogr
ogram display
am display .................................. 183 Index
507
507

Problem................................................. 102
Ra in-closing feature............................... 101
Smar
Smar tphone
tphone
see Smartphone integ ration
see Telephone
Smar
Smar tphone int
tphone int egr
egration
ation
Overview................................................ 322
Sno
Sno w c
w chains
hains................................................3 74
Soc ke
Soc ket (12 V)
t (12 V)
Boot/luggage compartment................... 133
Fr ont centre console.............................. 133
SoTw SoTw are
areupdate
update
System updates..................................... 297
Sound
Sound PRE- SAFE®
Sound................................... 59
Sound menu
Sound menu Functions overview................................ 335
Spar
Spar e wheel
e wheel
see Emer gency spa rewheel
Specialis Specialis t w t work
ork shop
shop
see Quali/ed specialist workshop
Speci/c
Speci/c absorp
absorption r
tion rate
ate ................................. 29 Speed Limit Assist
Speed Limit Assist
Function/no tes...................................... 249
Setting................................................... 250
System limitations.................................. 249
Speed limit f
Speed limit f or wint
or winter tyr
er tyres
es
Setting................................................... 235
St St andb andb y mode
y mode
Ac tivating/deactivating.......................... 222
Fu nction................................................ 222
St
St anding lights
anding lights............................................ .138
St
St ar
art-o.
t-o. assist
assist
Ac tivating............................................... 230
Fu nction................................................ 230
St
St ar
art/st
t/st op butt
op butt on
on
Pa rking theve hicle................................. 215
St arting theve hicle............................... .169
Switching on the po wer supply/vehicle.. 168
St
St ar
art/st
t/st op function
op function
see ECO start/stop function
St
St art
art er batt
er batt ery
ery
Charging (Remo teOnline)..................... .171
St
St ar
arting
ting
see Vehicle S
S t
tar
ar ting assist
ting assist ance
ance
see Jump-start connection
St
St ar
arting-o.
ting-o. aid
aid
see Hill Start Assist
St
St ationar
ationar y heat
y heater/v
er/ventilation
entilation
Ac tivating/deactivating (control panel)... 163
Setting (MBUX multimedia system)......... 164
S
S TEER C
TEER C ONTR
ONTROL
OL
Fu nction/no tes...................................... 227
St
St eer
eer ing wheel
ing wheel
Ad justing (manual ly)............................... 114
Buttons.................................................. 282
Care...................................................... 349
St eering wheel heater............................ 115
St St eer
eer ing wheel
ing wheel g
gear
ear shiT
shiT paddles
paddles .................. 189
St
St eer
eer ing wheel heat
ing wheel heat er
er
Ac tivating/deactivating.......................... 115
St ow
St owag age ar
e ar eas
eas
see Loading
see Stow age space
St ow
St owag age com e com par
partments
tments
see Loading
see Stow age space Index
523 523

Re
starting the tyre pressure monitor-
ing system............................................. 378
Selection...............................................3 79
Snow chains.......................................... 374
St oring................................................... 383
TIREFIT kit.............................................. 356
Ty re pressure (No tes)............................. 375
Ty re pressure loss warning system
(function)............................................... 378
Ty re pressure monitoring system
(function)............................................... 377
Ty re pressure table................................ .376
Unusual handling characteristics............ 374 U
U
U
Unloc nloc king
king
see Locking/unlocking
U
Updat pdat es
es
Impor tant system updates...................... 297
USB port
USB port Front st owage compartmen t.................. 121
Re ar....................................................... 134 V
V
V
V ehicle
ehicle
Activating/deactivating standby mode... 222
Ad ditional door loc k................................. 84
Cor rect use............................................. .40
Data acquisition....................................... 42
Data storag e............................................ 42
Diagnostics connection............................ 38
Equipment............................................... 26
Implied warrant y...................................... 41
Locking (automatically)............................ 87
Locking/unlocking (emer gency key)........ .88
Locking/unlocking (from inside)............... 85
Locking/unlocking (KEYLESS-GO)............ 86
Lo we ring................................................ 388
Medical aids........................................... .40
Pa rking up............................................. 222
QR code rescue car d............................... 41
Quali/ed specialist workshop.................. .39
Ra ising................................................... 384
REACH regulation.................................... 40
Re gistration............................................. 40
Setting collision de tection (par ked
ve hicle).................................................. 221
St andby mode function.......................... 222 St
arting (emer gency ope ration mode ).... 170
St arting (Remo teOnline)........................ 171
St arting (start/stop but ton)................... 169
SV HC (substances of very high conce rn)..40
Switching o. (start/stop button)............ 215
Switching on (start/stop button)............ 168
To wing................................................... 279
Ve ntilating (con venience opening)........... .96
V
V ehicle batt ehicle batt ery
ery
see On-board electrical system battery (12 V)
V
V ehicle camera
ehicle camera
Information............................................ 223
V
V ehicle data
ehicle data
Displaying (DYNAMIC SELECT)............... 185
Roof load............................................... 406
Ve hicle height....................................... .405
Ve hicle length........................................ 405
Ve hicle widt h......................................... 405
Wheelbase............................................. 405
V V ehicle dimensions
ehicle dimensions...................................... 405
V
V ehicle emerg
ehicle emerg ency st
ency start
art............................... 370
V
V ehicle
ehicle identi/cation
identi/cation number
number
see VIN Index
527
527