MERCEDES-BENZ B-CLASS HATCHBACK 2022 Owners Manual

&
DANGER Risk of f atal injury due to poison-
ous exhaust gases
If the tailpipe is blocked or suPcient v
entila-
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter the vehi-
cle. This is the case, for example, if the vehicle
gets stuck in the snow. 
Keep the tailpipe and the area around
t

he vehicle free from snow when the
engine or the stationary heater is run-
ning. 
Open a window on the side of the vehicle
f

acing away from the wind to ensure an
adequate supply of fresh air. &
WARNING Risk of accident due t
o the
brake system overheating
If you leave your foot on the brake pedal when
dr
iving, the brake system may overheat.
This increases the braking distance and the
brake system can even fail. 
Never use the brake pedal as a footrest. 
Do not depress the brake pedal and the
acceler
ator pedal at the same time while
driving. *
NOTE Engine damag
e due to excessively
high engine speeds The engine will be damaged if you drive with
t

he engine in the overrevving range. 
Do not drive with the engine in the over-
r
evving range. *
NOTE Causing w
ear to the brake linings by
permanently depressing the brake pedal 
Do not permanently depress the brake
pedal while dr

iving. 
To use braking eMect of t
he engine, shis
to a lower gear in good time. *
NOTE Damag
e to the drivetrain and
engine when pulling away 
Do not warm up the engine while the
v

ehicle is stationary. Pull away immedi-
ately. 
Avoid high engine speeds and driving at
full t

hrottle until the engine has reached
its operating temperature. *
NOTE Damag
e to the catalytic converter
due to non-combusted fuel The engine is not running smoothly and is mis-
Nr

ing.
Non-combusted fuel may get into the catalytic
converter. 
Only depress the accelerator pedal
slightl

y. 
Have the cause r
ectiNed immediately at
a qualiNed specialist workshop. 178
Driving and parking

*
NOTE Reduced battery life due to frequent
short-distance trips The 12 V battery may not be
suPcientl
y
charged when the vehicle is used only for
short-distance trips. This reduces the life of
the battery. 
Drive longer distances regularly to
c

harge the battery. *
NOTE Damag
e to the vehicle due to not
observing the maximum permitted head-
room clearance If the vehicle height is greater than the maxi-
mum per
mitted headroom clearance, the roof
and other parts of the vehicle may be dam-
aged. 
Observe the signposted headroom clear-
ance. 
If the vehicle height is greater than the
per
mitted headroom clearance, do not
enter. 
Observe the changed vehicle height with
add-on r
oof equipment. Notes on driving with a roof load, trailer or fully
laden v
ehicle
When driving with a loaded roof luggage rack or
trailer as well as with a fully laden or fully occu-
pied vehicle, the vehicle's driving and steering
characteristics change.
You should bear the following in mind:
= Do not exceed the permissible roof load and
towing capacity. Also observe the technical
data in the printed Owner's Manual.
= Evenly distribute the roof load, and place
heavy objects at the bottom. Also comply with
the notes on loading the vehicle
( page 122).
= Drive attentively, and avoid suddenly pulling
away, braking and steering as well as rapid
cornering.
Notes on driving on salt-treated roads
The braking eMect is limited on salt-treated roads. Therefore, observe the following notes:
= due t

o salt build-up on the brake disks and
brakepads, the braking distance can increase
considerably or result in braking only on one
side
= maintain a much greater safe distance to the
vehicle in front
To remove salt build-up: = brake occasionally while paying attention to
the traPc conditions
= carefully depress the brake pedal at the end of
the journey and when starting the next jour-
ney
Notes on aquaplaning
Aquaplaning can take place once a certain
amount of water has accumulated on the road
surface.
Observe the following notes during heavy precipi-
tation or in conditions in which aquaplaning may
occur:
= reduce speed
= avoid tyre ruts Driving and parking
179

=
a void sudden steering movements
= brake carefully
% Also observe the notes on regularly checking
wheels and tyr

es ( page 382).
Notes on driving through water on the road sur-
f
ace
Water which has entered into the vehicle can
damage the engine, electrics and transmission.
Water can also enter the air intake of the engine
and cause engine damage.
Observe the following if you must drive through
water:
= The water, when calm, may only reach the
lower edge of the vehicle body.
= Drive at a maximum speed of 10 km/h; water
can otherwise enter the vehicle interior or
engine compartment.
= Vehicles travelling in front, or oncoming vehi-
cles, can create waves which may exceed the
maximum permissible depth of the water.
The braking eMect of the brakes is reduced aser
fording. Brake carefully while paying attention to the
tr
aPc conditions until braking power has been
fully restored. ECO start/stop function
ECO start/stop function
% The ECO start/stop function is not available
in all dr

ive programs, depending on the
engine. Observe the status display on the
instrument display concerning this.
If all vehicle conditions for an automatic engine
s
top are met, the engine will be switched oM auto-
matically:
= Vehicles with manual transmission: you brake
the vehicle, shis into neutral i when travel-
ling at a low speed and then release the clutch
pedal.
= Vehicles with automatic transmission: you
brake the vehicle to a standstill in transmis-
sion position h or i.
= You activate the HOLD function or engage
transmission position j. %
If the system detects an intelligent stop inhibi-
t

or, e.g. a stop sign, the engine will not stop.
If you activate the HOLD function or engage
the park position j, the engine can be
switched oM in spite of an intelligent stop
inhibitor.
% In transmission position k, t
he engine will
not be switched oM automatically even when
the HOLD function is switched on.
The engine will restart automatically in the follow-
ing cases:
= V

ehicles with manual transmission: you
depress the clutch pedal.
= Vehicles with automatic transmission: you
engage transmission position h or k.
= You depress the accelerator pedal.
= The vehicle requires an automatic engine
start.
Status display on the instrument display: = The è symbol (green) appears when the
vehicle is at a standstill: the engine was
switched oM by the ECO start/stop function. 180
Driving and parking

=
The ç symbol (y ellow) appears when the
vehicle is at a standstill: not all vehicle condi-
tions for an engine stop have been met.
= Neither the è symbol nor the ç symbol
appears when the vehicle is at a standstill: an
intelligent stop inhibitor, e.g. a stop sign, has
been detected
= The s symbol appears: the ECO start/stop
function is deactivated or there is a malfunc-
tion.
If the engine was switched oM by the ECO start/
stop function and you leave the vehicle, a warning
tone will sound and the engine will not be restar-
ted. In addition, a display message reading Vehi-
cle is operational Switch off ignition before exit-
ing will appear on the instrument display. If you do
not switch oM the vehicle, it will automatically be
switched oM aser three minutes. Switching the ECO start/stop function on/oM

Press button 1.
A displa

y will appear on the instrument cluster
when you switch the ECO start/stop function
on/oM.
% s will be continuousl
y shown on the
instrument cluster while the ECO start/stop
function is deactivated. ECO display function
The ECO display summarises your driving charac-
t

eristics from the start of the journey to its com-
pletion and assists you in achieving the most eco-
nomical driving style.
You can inOuence consumption by doing the fol-
lowing:
= driving with particular care.
= Vehicles with automatic transmission: driving
in drive program .
= Vehicles with manual transmission: driving in
drive program A.
= following the gearshis recommendations. Driving and parking
181

The lettering in the segment will light up brightly,
t he outer edge will light up and the segment will
Nll up when the following driving style is adopted:
= 1 Steady speed
= 2 Gentle deceleration and rolling
= 3 Moderate acceleration
The lettering in the segment will be grey, the outer
edge will be dark and the segment will empty
when the following driving style is adopted:
= 1 Fluctuations in speed
= 2 Heavy braking
= 3 Sporty acceleration
The ECO display will show you when you have
driven economically:
= The three segments will Nll up completely at
the same time
= The edges around all three segments will light
up
The additional range achieved as a result of your
driving style in comparison with a driver with a
very sporty driving style will be shown in the centre of display
4. The r ange displayed does
not indicate a Nxed reduction in consumption. Regenerative brake system (plug-in hybrid)
Function of the regenerative brake system
Depending on t
he selected recuperation level, the
electric motor is operated as an alternator when
in overrun mode and during braking in order to
charge the high-voltage battery while driving. As
soon as you take your foot oM the accelerator
pedal when the vehicle is in motion and in trans-
mission position h, recuperation in overrun
mode is initiated.
The higher the recuperation, the more sharply the
vehicle is braked when coasting and the more
electrical energy is fed into the high-voltage bat-
tery.
The deceleration in overrun mode may not be suf-
ficient depending on the driving conditions.
Decelerating to a standstill is not possible. Also
brake with the service brake if necessary. Always
adapt your speed to the driving conditions and
keep a suPcient distance. The recuperative brake system has the following
c

haracteristics:
= supports braking with electronically controlled
brake force boosting
= converts the kinetic energy of the vehicle into
electric energy
% If you brake hard, the mechanical brake is
also used. This means t
hat the maximum
recuperative energy cannot be recovered. The
more you drive and brake in an anticipatory
manner, the more ePciently energy can be
recuperated.
System limits
The br
aking eMect of the electric motor during
recuperation in overrun mode may be reduced or
may not be available at all in the following situa-
tions:
= when the high-voltage battery charge level
increases
= if the high-voltage battery is not yet at a nor-
mal operating temperature 182
Driving and parking

In these cases, the desired deceleration is set by
t
he brake control system.
Manually setting recuperative deceleration
% In the Î dr
ive program, you can use the
steering wheel gearshis paddles to manually
adjust the intensity of recuperation in overrun
mode. %
When the vehicle is started again or transmis-
sion position h is eng

aged again, the stand-
ard setting is automatically set. The following recuperation levels are available:
= hX Int

elligent, anticipatory recuperation
with ECO Assist (standard setting)
( page 183)
= hq No recuperation: the vehicle rolls freely
= h Normal recuperation
= hX Increased recuperation: strong deceler-
ation in overrun mode, e.g. for driving on
downhill gradients
= hXX Maximum recuperation: maximum
deceleration in overrun mode 
To increase recuperation: br
ieOy pull gearshis
paddle 1. 
To reduce recuperation: br
ieOy pull gearshis
paddle 2. 
Standard setting: pull and hold g
earshis pad-
dle 1 or 2 or engage transmission position
h again. The Instrument Display shows currently set recu-
per

ation level 1, for example, hX. Eco Assist function (plug-in hybrid)
%
The following function is country-dependent
and a

vailable only in conjunction with an inte-
grated hard drive navigation system.
ECO Assist is active only in drive programs A,
Î, Ï and , and onl

y in transmission
positions h or hX. Permanent manual gear-
shising p must be switched oM ( page 194).
ECO Assist analyses data for the vehicle's expec-
ted route. This allows the system to optimally Driving and parking
183

adjust the driving style for the route ahead, save
fuel and r
ecuperate.
ECO Assist is displayed on the Assistance
menu(  page 288). 1
Event ahead, e.g. roundabout
2 Distance display for the event ahead
3 "Foot oM t
he accelerator" prompt Displayable previous events
1
The f
ollowing events 1 can be detected and dis-
played for the route section ahead:
= Vehicle in front
= Speed limit
= Downhill and uphill gradients
= Junctions and roundabouts
= Bends
The segments of distance display 2 show the
distance to the event ahead as follows:
= A few segments light up: the event ahead is
near. =
Man
y segments light up: the event ahead is
further away.
If ECO Assist is active, the "Foot oM the accelera-
tor" symbol 3 will appear on the instrument dis-
play and on the head-up display beside the trans-
mission position display.
When the vehicle nears an event, ECO Assist will
calculate the optimal speed for minimal energy
consumption based on the distance, speed and
gradient. The "Foot oM the accelerator" symbol 3
will appear on the instrument display.
If you take your foot oM the accelerator pedal in
good time, the remaining segments on the display
will successively turn green until the event shown
is reached. The drivetrain will be set for minimal
energy consumption. The vehicle will recuperate
autonomously and thus charge the battery.
% You can also manually increase or reduce the
r
ecuperation in drive program Î. However,
ECO Assist is available only in the hX
setting (  page 183).
If there is no response to the "Foot oM t
he accel-
erator" prompt 3, the segments will remain
white. 184
Driving and parking

The event will be shown for a short time
aser it
has been passed.
If t
he event involves a vehicle in front, the symbol
will be shown in green as soon as there is a
response to "Foot oM the accelerator" prompt 3.
If the system does not intervene during the event
ahead, nothing will be displayed. The system will
be passive.
System limits
ECO Assist can function even more precisely if
the route is adhered to when route guidance is
active. The basic function is also available without
active route guidance. Not all information and
traPc situations can be foreseen. The quality
depends on the map data.
ECO Assist is only an aid. The driver is responsible
for keeping a safe distance from the vehicle in
front, for vehicle speed and for braking in good
time. The driver must be ready to brake at all
times, irrespective of whether the system inter-
venes. The system may be impaired or may not function
in t
he following situations:
= If visibility is poor, e.g. due to insuPcient illu-
mination of the road, highly variable shade
conditions, rain, snow, fog or heavy spray.
= If there is glare, e.g. from oncoming traPc,
direct sunlight or reOections.
= If there is dirt on the windscreen in the area of
the multifunction camera or the camera is
misted up, damaged or obscured.
= If road signs are hard to detect, e.g. due to
dirt, snow or insuPcient lighting, or because
they are obscured.
= If the information on the navigation system's
digital map is incorrect, insuPcient or out of
date.
= If signs are ambiguous, e.g. road signs in road-
works or in adjacent lanes. Function of the route-based operating-mode strat-
egy (plug-in h
ybrid) %
The following function is country-dependent
and a

vailable only in conjunction with an inte-
grated navigation system.
The route-based operating-mode strategy is active
onl
y in drive programs A and . When
route guidance is active, data on the planned
route is analysed. This function can be activated
and deactivated in the multimedia system
(  page 307).
If the function is active, data on the further course
of the route is evaluated. This includes e.g. road
type, speed limitations and altitude data.
The hybrid system then adapts the operating
strategy to the further course of the route:
= Use of electrical energy and the combustion
engine are adapted.
= State of charge of the high-voltage battery is
controlled accordingly.
= Electrical energy is reserved especially for
electric mode, e.g. urban route sections. Driving and parking
185

=
The v ehicle automatically selects the operat-
ing mode.
When the route-based operating-mode strategy is
activated, the energy Oow display shows the sta-
tus of the function as !

 Eco
=
A
vailable only for vehicles with automatic
transmission
= Particularly economical driving
= Balance between traction and stability
= Recommended for all road conditions
= Full development of all intelligent hybrid func-
tions and adaptation of the coasting charac-
teristics of the vehicle to traPc (plug-in hybrid)
= The selection of the matching drive type by
the hybrid system depends on the driving con-
ditions and the distance (plug-in hybrid)
% Depending on the situation, the cylinder can
be br

ieOy deactivated in the  and A
drive programs, depending on the engine.
% The ESP n
se
ttings in the drive programs 
and A are designed for stability. Therefore,
choose one of these drive programs espe-
cially when transporting roof loads, in trailer
operation and when the vehicle is fully loaded
or fully occupied. Depending on the drive program, the following
sy
stems will change their characteristics:
= Drive
- Engine and transmission management
- Active Distance Assist DISTRONIC
= ESP n
= Vehicles with adaptive damping adjustment:
suspension
= electric power steering Notes on the roof load display
Certain drive programs and ESP
n
se
ttings are
unsuitable for transporting a roof load.
If one of these drive programs is set or selected,
the W symbol is shown as a warning. When
this symbol is shown, the selected drive program
is not suitable for transporting a load on the roof.
The following drive programs are aMected:
= Sport drive program
= Individual drive program with the Sport ESP n
setting %
The symbol is also shown in the following sit-
uations:
= W

ithin the themes if a corresponding drive
program is saved
For more information on themes see .
= Within the reset display if the previously
active drive program is unsuitable for the
transport of a roof load
For further information on the reset dis-
play, see (  page 189, 188). Selecting the drive program
%
Depending on the equipment, the vehicle will
be Ntt

ed with either a switch or a button. Driving and parking
187