MERCEDES-BENZ A-CLASS SALOON 2022 Owners Manual

Characteristics with moderate power output
r
equests:
= The combustion engine is switched oM as
osen as possible during the journey.
= The vehicle can, depending on the drive pro-
gram selected and the state of charge of the
high-voltage battery, be accelerated electri-
cally up to speeds of approximately
140 km/h.
Characteristics with high power output requests:
= The electric motor supports the combustion
engine (boost eMect), e.g. when you pull away
or accelerate.
= The high-voltage battery is discharging.
Characteristics when the accelerator pedal is
released during the journey:
= The electric motor will be operated as an alter-
nator when in overrun mode and during brak-
ing.
= The high-voltage battery is charging. Notes on electric mode:
= V
ehicles with hybrid systems generate signiN-
cantly less noise when stationary and when
being driven than vehicles with combustion
engines.
= When you are driving in electric mode, the
vehicle may not be heard by other road users
due to the signiNcantly reduced noise gener-
ated.
It is for this reason that the vehicle is equip-
ped with a sound generator, which serves as
an acoustic vehicle alert system (AVAS).
= If not all the vehicle conditions for electric
mode are met, the combustion engine will be
switched on.
% Vehicles with diesel particulate Nlt
ers: during
the regeneration of the diesel particulate Nl-
ter, the drive programmes are not available or
are restricted and the charge level of the high-
voltage battery may change.
Notes on the acoustic vehicle alert system:
= The sound g

enerator generates speed-depend-
ent vehicle noise emissions when the vehicle is driving forwards or reversing at a speed of
up t

o around 30 km/h.
= This helps other road users, particularly
pedestrians and cyclists, to hear your vehicle
better.
= When you drive at speeds above 20 km/h the
acoustic vehicle alert system will gradually
switch oM.
= The sound generator will be oM when the vehi-
cle is stationary.
Manual disconnection of the high-voltage on-
board electrical system &
DANGER Risk of deat
h and Nre due to
modiNed and/or damaged components of
the high-voltage on-board electrical sys-
tem
The vehicle's high-voltage on-board electrical
sy
stem is under high voltage. If you modify
component parts in the vehicle's high-voltage
on-board electrical system or touch damaged
component parts, you may be electrocuted. In
addition, modiNed and/or damaged compo-
nents may cause a Nre.158
Driving and parking

In the event of an accident or impact to the
v ehicle underbody, components of the high-
voltage electrical system may be damaged
although the damage is not visible. 
Never make any modiNcations t
o the
high-voltage on-board electrical system. 
Do not switch on or use the vehicle if its
high-v
oltage on-board electrical system
components have been modiNed or dam-
aged. 
Never touch damaged components of
t

he high-voltage on-board electrical sys-
tem. 
Aser an accident, do no
t touch any com-
ponents of the high-voltage on-board
electrical system. 
Aser an accident, ha
ve the vehicle trans-
ported away. 
Have the components of the high-voltage
on-boar
d electrical system checked at a
qualiNed specialist workshop and
replaced if necessary. Requirements:
Onl

y disconnect the high-voltage on-board electri-
cal system manually in the following situations:
= The 6 restraint system warning lamp lights
up in the Instrument Display, e.g. aser an
accident.
= The vehicle is badly damaged, e.g. aser an
accident, and the restraint system compo-
nents have not been triggered. Operating the high-voltage disconnect device 
Switch oM t
he vehicle. 
Shis t
he transmission to position j. 
Apply the electric parking brake. 
Secure the vehicle against rolling away (see
t
he vehicle Owner's Manual). 
Open the bonnet. Driving and parking
159


Press release tab 1 in t he direction of the
arrow and pull it out. 
Pull high-voltage disconnect device 2 in t
he
direction of the arrow until it engages.
The high-voltage on-board electrical system is
switched oM.
All work on the hybrid drive system (including
aser disconnecting t

he high-voltage on-board
electrical system manually) may only be carried
out in a qualiNed specialist workshop.Switching on the power supply or the vehicle
&
WARNING Risk of accident and injur
y due
to leaving children unattended in the vehi-
cle
If children are les unatt
ended in the vehicle,
they could, in particular:
= open doors, thereby endangering other
persons or road users.
= get out and be struck by oncoming traPc. =
oper
ate vehicle equipment and become
trapped, for example.
In addition, the children could also set the
vehicle in motion by, for example:
= releasing the parking brake.
= changing the transmission position.
= starting the vehicle. 
Never leave children unattended in the
v
ehicle. 
When leaving the vehicle, always take the
k
ey with you and lock the vehicle. 
Keep the vehicle key out of the reach of
c
hildren. Requirements:
= The k

ey is in the vehicle and is recognised.
= Vehicles with automatic transmission: The
brake pedal is not depressed.
= Vehicles with manual transmission: The clutch
pedal is not depressed. 
To switch on the power supply: pr ess button
1 once.
You can, for example, switch on the wind-
screen wiper.
The power supply is switched oM ag
ain if the fol-
lowing conditions are met:
= You open the driver's door.
= You press button 1 twice more.160
Driving and parking


To switch on the vehicle: pr ess button 1
twice.
Indicator and warning lamps light up on the
instrument cluster.
The vehicle is switched oM ag
ain if one of the fol-
lowing conditions is met:
= Vehicles with automatic transmission: You do
not start the vehicle within 15 minutes and the
transmission is in position j or the electric
parking brake is applied.
= Vehicles with manual transmission: You do not
start the vehicle within 15 minutes and the
electric parking brake is applied.
= You press button 1 once. Starting the vehicle
Starting the vehicle with the start/stop button
&
DANGER Risk of f
atal injuries due to
exhaust gases
Combustion engines emit poisonous exhaust
g
ases such as carbon monoxide. Breathing in these exhaust gases is hazardous to health
and r

esults in poisoning. 
Never leave the engine and, if present,
t

he stationary heater, running in an
enclosed space without suPcient venti-
lation. &
WARNING Risk of Nr
e due to Oammable
material in the engine compartment or the
exhaust system
Flammable materials may ignite. 
Therefore, check regularly that there are
no Oammable mat

erials in the engine
compartment or on the exhaust system. Requirements:
= The k

ey is in the vehicle and is recognised. 
Vehicles with manual transmission: Depr
ess
the clutch pedal. 
Vehicles with automatic transmission: Shis
t
he transmission to position j or i. 
Depress the brake pedal and press button 1
once. 
If the vehicle does not start: switch oM non-
essential consumer
s and press button 1
once. 
If the vehicle still does not start and the Place
the key in the marked space See Owner's
Manual displa

y message appears on the
instrument display: start the vehicle with the
key in the marked space (emergency opera-
tion mode) ( page 162).
% You can switch oM t
he vehicle while driving. To
do this, press button 1 for about three sec-
onds or press button 1 three times within
three seconds. Be sure to observe the safety
notes concerning this under "Driving tips"
(  page 164).
Observe any information regarding display mes-
sag
es that can be displayed on the instrument
display. Driving and parking
161

Starting the vehicle with the key in the stowage
com partment (emergency operation mode)
If the vehicle does not start and the Place the
key in the marked space See Owner's Manual
message appears in the instrument display, you
can start the vehicle in emergency operation
mode. Marked space (example with cup holder without
co

ver) 
Open the cover of marked space 2 if neces-
sar
y. 
Make sure that marked space 2 is em
pty. 
Remove key 1 fr
om the key ring. 
Place key 1 in mar
ked space 2 on symbol
3.
The vehicle will start aser a short time.
If you remove key 1 from marked space 2,
the vehicle can still be driven. For further
engine starts however, key 1 must be loca-
ted in marked space 2 on symbol 3 during
the entire journey. 
Have key 1 c
hecked at a qualiNed specialist
workshop.
If the vehicle does not start: 
Place key 1 in mar
ked space 2 and leave it
there. 
Vehicles with manual transmission: Depr
ess
the clutch pedal. 
Depress the brake pedal and start the vehicle
using t
he start/stop button. %
You can switch on the power supply or the
v

ehicle with the start/stop button.
Observe any information regarding display mes-
sag
es that can be displayed on the instrument
display. Starting the vehicle via Remote Online Services
Cooling or heating the vehicle interior before
s

tarting the journey
Ensure the following before starting the engine:
= The legal stipulations in the area where your
vehicle is parked allow engine starting via
smartphone.
= It is safe to start and run the engine where
your vehicle is parked.
= The fuel tank is suPciently full.
= The starter battery is suPciently charged.
Charging the starter battery before starting the
journey
You can receive a message on your smartphone
when the state of charge of the starter battery is
low. You can then start the vehicle with the smart- 162
Driving and parking

phone to charge the battery. The vehicle is auto-
maticall y switched oM aser ten minutes.
Ensure the following before starting the engine:
= The legal stipulations in the area where your
vehicle is parked allow engine starting via
smartphone.
= It is safe to start and run the engine where
your vehicle is parked.
= The fuel tank is suPciently full.
Starting the vehicle (Remote Online) &
WARNING Risk of cr
ushing or entrapment
due to unintentional starting of the engine
Limbs could be crushed or trapped if the
engine is s
tarted unintentionally during service
or maintenance work. 
Always secure the engine against unin-
t

entional starting before carrying out
maintenance or repair work. Requirements:
= P

ark position j is selected.
= The anti-thes alarm system is not activated. =
The hazar
d warning light system is switched
oM.
= The bonnet is closed.
= The doors are closed and locked.
= The windows and sliding sunroof are closed. 
Start the vehicle using the smartphone.
Aser e

very engine start, the engine runs for
ten minutes.
You can carry out a maximum of two consecutive
s
tarting attempts. You must start the engine with
the key before trying to start the vehicle again
with the smartphone.
You can switch oM the vehicle at any time as fol-
lows:
= Via the Smartphone App
= By pressing the Ü or ß button on the
key
% Further information can be found in the
smar
tphone app. Securing the vehicle against starting before carry-
ing out maint

enance or repair work: 
Switch on the hazard warning light system.
or 
Unlock the doors.
or 
Open a side window or the sliding sunroof. Running-in notes
To preserve the engine during the Nr

st 1,500 km:
= Drive at varying road speeds and engine
speeds.
= Do not drive at speeds greater than
140 km/h.
= Drive the vehicle in driving mode A
or .
= Shis to the next highest gear at the very latest
when the needle reaches the last third before
the red area in the rev counter.
= Do not shis down manually in order to brake.
= Avoid overstraining the vehicle, e.g. driving at
full throttle. Driving and parking
163

=
V ehicles with automatic transmission: do not
depress the accelerator pedal beyond the
pressure point (kickdown).
= Only increase the engine speed gradually and
accelerate the vehicle to full speed aser
1,500 km.
This also applies when the engine or parts of the
drivetrain have been replaced.
Please also observe the following running-in
notes:
= In certain driving and driving safety systems,
the sensors adjust automatically while a cer-
tain distance is being driven aser the vehicle
has been delivered or aser repairs. Full sys-
tem eMectiveness is not reached until the end
of this teach-in process.
= Brake pads, brake discs and tyres that are
either new or have been replaced only achieve
optimum braking eMect and grip aser several
hundred kilometres of driving. Compensate for
the reduced braking eMect by applying greater
force to the brake pedal. Notes on driving
&
WARNING Risk of accident due t
o objects
in the driver's footwell
Objects in the driver's footwell may impede
pedal tr
avel or block a depressed pedal.
This jeopardises the operating and road safety
of the vehicle. 
Stow all objects in the vehicle securely
so t
hat they cannot get into the driver's
footwell. 
Always Nt t
he Ooor mats securely and as
prescribed in order to ensure that there
is always suPcient room for the pedals. 
Do not use loose Ooor mats and do no
t
place Ooor mats on top of one another. &
WARNING Risk of accident due t
o incor-
rect footwear
Incorrect footwear includes, for example: = shoes wit

h platform soles =
shoes wit
h high heels
= slippers
There is a risk of an accident. 
Always wear suitable footwear so that
y

ou can operate the pedals safely. &
WARNING Risk of accident if t
he vehicle is
switched oM while driving
If you switch oM t
he vehicle while driving,
safety functions are restricted or no longer
available.
This may aMect the power steering system and
the brake force boosting, for example.
You will need to use considerably more force
to steer and brake, for example. 
Do not switch oM t
he vehicle while driv-
ing. 164
Driving and parking

&
DANGER Risk of f atal injuries due to
exhaust gases
Combustion engines emit poisonous exhaust
g
ases such as carbon monoxide. Breathing in
these exhaust gases is hazardous to health
and results in poisoning. 
Never leave the engine and, if present,
t

he stationary heater, running in an
enclosed space without suPcient venti-
lation. &
WARNING Risk of skidding and of an acci-
dent due t
o shising down on slippery road
surfaces
If you shis do
wn on slippery road surfaces to
increase the engine braking eMect, the drive
wheels may lose traction. 
Do not shis do
wn on slippery road surfa-
ces to increase the engine braking
eMect. &
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. Driving and parking
165

*
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. *
NOTE R
educed 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 119).
= 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. 166
Driving and parking

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

es ( page 368).
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. Driving and parking
167