2021 MERCEDES-BENZ B-CLASS HATCHBACK engine

R
avoid sudden steering mo vements
R brake careful ly
% Also obser vethe no tes on regula rly ch ecking
wheels and tyres (/ page 374).
N
No ot
tes on dr
es on dr iving t
iving thr
hrough w
ough w at
ater on t
er on t he r
he r oad sur-
oad sur-
f
f ace
ace
Wa ter which has entered into theve hicle can
damage the engine, electrics and transmission.
Wa ter can also enter the air intake of the engine
and cause engine damage.
Obser vethefo llowing if you must drive thro ugh
wa ter:
R The water,when calm, may only reach the
lo we r edge of theve hicle body.
R Drive at a maximum speed of 10 km/h; water
can otherwise enter theve hicle interior or
engine compartment.
R Vehicles tr avelling in front, or oncoming vehi-
cles, can create waves which may exceed the
maximum permissible dep thofthewa ter.
The braking e.ect of the brakes is reduced aTer
fo rd ing. Brake carefully while paying attention toth
e tra1c conditions until braking po wer has been
fully restored. EC
EC
O st
O st ar
art/st
t/st op function
op function EC
EC
O st
O st ar
art/st
t/st op function
op function
% The ECO start/stop function is not available
in all drive prog rams, depending on the
engine. Obser vethe status display in the
inst rument display forth is.
If all vehicle- related conditions for an automatic
engine stop are met, the engine is switched o.
automaticall y:
R V
V ehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: You brake
th eve hicle, shiT into neutral 005Cwhen tr avel-
ling at a low speed and then release the clutch
pedal.
R V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: Yo u
brake theve hicle toa standstill in transmis-
sion position 005Bor005C.
R You activate the HOLD function or engage
transmission position 005D. %
Ifth e system de tects an intelligent stop inhibi-
to r,fo rex ample, a stop sign, the engine will
not stop.
If yo u activate the HOLD function or engage
th e park position 005D,the engine can be
switched o. in spite of an intelligent stop
inhibitor.
% In transmission position 005E,the engine is not
switched o. automatically even when the
HOLD function is switched on.
The engine restarts au tomatically in thefo llowing
cases:
R V
V ehicles wit ehicles wit h manual tr
h manual tr ansmission:
ansmission: Yo u
depress the clutch pedal.
R V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: Yo u
shiT into transmission position 005Bor005E.
R You depress the accelerator pedal.
R An automatic vehicle engine start is requ ired.
St atus displ ayinthe inst rument displa y:
R The symbol 00D6(gre en) appears when the
ve hicle is at a standstill: The engine was
switched o. bythe ECO start/s top function. 176
176
Driving and parking

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

Syst
Syst
em limits
em limits
ECO Assist can function even more precisely if
th ero ute is adhered towhen route guidance is
active. The basic function is also available without
active route guidance. Not all information and
tra1c situations can be fore seen. The quality
depends on the map data.
ECO Assist is only an aid. The driver is responsible
fo rke eping a safe distance from theve hicle in
front, forve hicle speed and for braking in good
time. The driver must be ready tobrake at all
times ir respecti veof whe ther the system inter-
ve nes.
The system may be impai red or may not function
in thefo llowing situations:
R If visibility is poor, e.g. due toinsu1cient illu-
mination of thero ad, highly variable shade
conditions, rain, sno w,fog or heavy spr ay.
R Ifth ere is glare, e.g. from oncoming tra1c,
direct sunlight or re0ections.
R Ifth ere is dirt on the windscreen in the area of
th e multifunction camera or the camera is
misted up, damaged or obscured. R
Ifro ad signs are hard todetect, e.g. due to
dirt, snow or insu1cient lighting, or because
th ey are obscured.
R Ifth e information on the navigation system's
digital map is incor rect, insu1cient or out of
date.
R If signs are ambiguous, e.g. road signs in road-
wo rks or in adjacent lanes. F F
unction of t
unction of t he r
he rout
oute-based oper
e-based oper ating-mode s
ating-mode strtrat-
at-
egy (plug-in h
egy (plug-in h ybr
ybrid)
id) %
The following function is countr y-dependent
and available only in conjunction with an inte-
gr ated navigation system.
The route-based operating-mode strategy is active
only in drive prog rams A and;. When
ro ute guidance is active, data on the planned
ro ute is anal ysed. This function can be activated
and deactivated in the multimedia system
(/ page 301).
If th e function is active, data on the fur ther course
of thero ute is evaluated. This includes, e.g. road
type, speed limi tations and altitude data. The
hybrid system then adapts the operating
strategy tothe fur ther course of thero ute:
R Use of electrical energy and the combustion
engine are adap ted.
R State of charge ofthe high-voltage battery is
controlled accordingl y.
R Electrical energy is reser ved especially for
electric mode, e.g. urban route sections.
R The vehicle automatically selects the operat-
ing mode.
When thero ute-based operating-mode strategy is
activated, the energy 0ow display sho ws the sta-
tus of the function as – active or passive
(/ page 302).
The route-based operating-mode strategy is
switched topassive under thefo llowing condi-
tions:
R You are driving in a drive prog ram other than
A or;.
R Route guidance is active.
R High-voltage battery's state of charge istoo
lo w. Driving and parking
181
181

D
D
YN
YNAMIC SELECT switch AMIC SELECT switch F
F
unction of t
unction of t he D
he DYN
YNAMIC SELECT switchAMIC SELECT switch %
Depending on the engine and equipment, the
ve hicle has di.erent drive prog rams.
Use theDY NAMIC SELECT switch tochange
between thefo llowing drive prog rams.
The drive prog ram selected appears in the inst ru-
ment displa y.
= Individual
R Individual settings
C Sport
R Continues too.er stability but with a sporty
setup
R Allo ws th e sporty driver a more active driving
style
R Driving with the combustion engine and rein-
fo rc ed boost e.ect (plug-in hybrid)
R Deactivation of the combustion engine when
stationary (plug-in hybrid)
R Only suitable for good road conditions, a dry
ro ad sur face and a clear st retch of road A
Comfort
R Comfor table and economical driving
R Balance between traction and stability
R The selection of the matching drive type by
th ehy brid system depends on the driving con-
ditions and the distance (plug-in hybrid)
R Recommended for all road conditions
Î Electric (plug-inhybrid)
R Electric mode – driving without the combus-
tion engine is possible up toappr ox.
140 km/h
R Adjustable recuperation in overrun mode
R Adaptation of Active Distance Assist
DISTRONIC for electric mode
R Depending on the equipment, the maximum
set speed for cruise control, limiter and Active
Distance Assist DISTRONIC can be limited to
th e maximum electrically drivable speed
R Activation of the combustion engine via the
pressure point of the accelerator pedal (kic k-
down) Ï
Battery Level (plug-inhybrid)
R Prioritised maintenance of the state of charge
of the high-voltage batter y,e.g. for subse-
qu ent journe ysinthe inner city/low emission
zones
R The selection of the matching drive type by
th ehy brid system depends on the driving con-
ditions and the distance
; Eco
R Only available forve hicles with automatic
transmission
R Particular lyeconomical driving
R Balance between traction and stability
R Recommended for all road conditions
R Full de velopment of all intelligent hybrid func-
tions and adap tation of the coasting charac-
te ristics of theve hicle totra1c (plug-in hybrid)
R The selection of the matching drive type by
th ehy brid system depends on the driving con-
ditions and the distance (plug-in hybrid) 182
182
Driving and parking

%
Depending on the situation, the cylinder can
be brie0y deactivated in the drive pro-
gr ams ; andA, depending on the
engine.
% The ESP ®
settings in the drive prog rams ;
and A are designed for stability. Therefore,
ch oose one of these driving prog rams, espe-
cially when transporting roof loads, in trailer
operation and when theve hicle is fully loaded
or fully occupied.
Depending on the drive prog ram, thefo llowing
systems change their characteristics:
R Drive
- engine and transmission management
- Active Distance Assist DISTRONIC
R ESP ®
R V
Vehicles wit
ehicles wit h adap
h adaptiv
tive dam
e dam ping adjus
ping adjustment tment:
:
suspension
R electric po wer steering N
No
ot
tes on t
es on t he r
he roof load display
oof load display Cer
tain drive prog rams and ESP ®
settings are
unsuitable for transporting a roof load.
If one of these drive prog rams is set or selected,
th eW symbol is shown as a warning. When
th is symbol is shown, the selected drive prog ram
is not suitable for transporting a load on thero of.
The following drive prog rams are a.ected:
R Sport
Sport drive prog ram
R Individual
Individual drive program with the Sport ESP ®
setting
% The symbol is also shown in thefo llowing sit-
uations:
R Within theth emes if a cor responding drive
prog ram is sa ved
Fo r more information on themes see .
R Within there set display if the pr eviously
active drive prog ram is unsuitable forthe
transport of a roof load
Fo r fur ther information on there set dis-
pla y,see (/ page 184). Selects t
Selects t
he dr
he dr iv
ive pr
e pr ogr
ogram
am %
Depending on the equipment, theve hicle is
/tted with either a switch or a but ton. #
Press DYNAMIC SELECT switch 1forw ards
or backwards.
The drive prog ram selected appears in the
inst rument displa y. Driving and parking
183 183

Displa
Displa
ying v
ying vehicle data
ehicle data Multimedia system:
4 © 5
Info #
Select Vehicle.
The vehicle data is displ ayed. Displa
Displa
ying engine data
ying engine data Multimedia system:
4 © 5
Info #
Select Engine.
The engine data is displa yed.
% The actual (maximum) values that can be ach-
ie ve dfo r engine output and engine torque
may deviate from the certi/ed values within
th e count ry-speci/c guidelines for permissible
to lerances (basis: UN-ECE No. 85 or count ry-
speci/c guidelines).
In0uencing variables that can in0uence this
are, forex ample:
R Sea le vel
R Fuelqu ality R
Outside temp erature
R Operating temp erature of the engine
% The values displa yed ser veonly as orienta-
tion. The values for engine output and engine
to rque shown on the media display may devi-
ate from the actual values. Calling up t
Calling up t
he fuel consump
he fuel consump tion indicat
tion indicator
or Multimedia system:
4 © 5
Info #
Select Consumption.
The cur rent and average fuel consum ption is
displa yed. Manual tr
Manual tr
ansmission
ansmission Oper
Oper
ating t
ating t he
heg
gear
ear shiT
shiT lev
lever
er &
W
WARNING
ARNING Risk of accident and inju rydue
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. Driving and parking
185
185

#
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. *
N
NOOTE
TE Damage tothe engine and trans-
mission byshiTing toage ar that is too
low #
When changing between gears 004Band
004C push thege arshiT le verto theright. #
Do not shiT down at high speeds. *
N
NOOTE
TE Damage tothe coupling due to
improper use Holding
theve hicle on inclines with a slipping
coupling can damage it. #
Do not allow the coupling toslip in order
to hold theve hicle on inclines. *
N
NOOTE
TE Damage tothe transmission by
shiTing toreve rsege ar 005E while theve hi-
cle is in motion #
Only shiT into reve rsege ar 005E when the
ve hicle is stationar y. 005E
Reversege ar
0047 -004C
Forw ard gears
005C Neutral #
Eng
Eng aging f
aging f orw
orwar
ard g
d g ear
ear s
s0047 -004C or neutr
or neutr al
al
005C :
:
R Depress the clutch pedal comple tely.
R Turn thege arshiT le verto the desired posi-
tion. 186
186
Driving and parking

#
Eng
Eng aging rev
aging rever
erse g
se g ear
ear 005E:
:
R Depress the clutch pedal comple tely.
R Pull thege arshiT le ver up, push it tothe
leT and then pull it bac k. Gear
Gear
shiT
shiT r
recommendation
ecommendation The
gearshiT recommendation assists you in
adopting an economical driving style. #
When gearshiT recommendation 1appears
on the inst rument displa y,shiT tothere com-
mended gear. A
A
ut
ut omatic tr
omatic tr ansmission
ansmission DIRECT SELECT lev
DIRECT SELECT lev
er
er F
F
unction of t
unction of t he DIRECT SELECT lev
he DIRECT SELECT lev er
er &
W
WARNING
ARNING Risk of accident due toincor-
re ct gearshiTing
If th e engine speed is higher than the idle
speed and you engage the transmission posi-
tion 005Bor005E, theve hicle may accelerate
sharpl y. #
Ifyo u engage the transmission position
005B or005E when theve hicle is at a stand-
still, alw ays depress the brake pedal
/rmly and do not accelerate at the same
time. &
W
WARNING
ARNING Risk of accident and injury due
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. Driving and parking
187
187