MERCEDES-BENZ A-CLASS SALOON 2022 Owners Manual

ASSYST PLUS service interval display
Function of the ASSYST PLUS service interval dis-
pla
y The ASSYST PLUS service interval display on the
ins
trument display informs you of the time or dis-
tance remaining before the next service due date.
You can hide this service display using the back
button ( on the steering wheel.
Depending on how the vehicle is used, the
ASSYST PLUS service interval display may shorten
the service interval, e.g. in the following cases:
= Mainly short-distance driving
= When the engine is osen les idling for long
periods
= In the event of frequent cold start phases
= Vehicles with a diesel particulate Nlter: in the
event of frequently interrupted regeneration of
the diesel particulate Nlter
Mercedes-Benz recommends avoiding such oper-
ating conditions. You can obtain information concerning the servic-
ing of y

our vehicle from a qualiNed specialist
workshop, e.g. a Mercedes-Benz service centre. Displaying the service due date
On-board computer:
4 Service 5
ASSYST PLUS
The ne

xt service due date is displayed. 
To exit the display: pr
ess the back button
( on the steering wheel.
Bear in mind the following related topic:
= Oper

ating the on-board computer
( page 276). Information on regular maintenance work
*
NOTE Pr
emature wear through failure to
observe service due dates Maintenance work which is not carried out at
t
he right time or incompletely can lead to
increased wear and damage to the vehicle. 
Adhere to the prescribed service inter-
v
als. 
Always have the prescribed maintenance
w

ork carried out at a qualiNed specialist
workshop. Notes on special service requirements
The prescribed service interval is based on nor-
mal oper

ation of the vehicle. Have the mainte-
nance work carried out more osen than prescri-
bed if operating conditions are diPcult or the
vehicle is subject to increased stress.
The ASSYST PLUS service interval display is only
an aid. It is the responsibility of the driver of the
vehicle to have maintenance work carried out
more osen than prescribed due to actual operat-
ing conditions and/or stresses.
Examples of arduous operating conditions:
= Regular city driving with frequent intermediate
stops
= Mainly short-distance driving 328
Maintenance and care

=
F requent operation in mountainous terrain or
on poor road surfaces
= When the engine is osen les idling for long
periods
= Operation in particularly dusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, have the
interior air Nlter, air Nlter, engine oil and oil Nlter,
for example, changed more frequently. Check the
tyres more frequently if the vehicle is operated
under increased stress. Further information can
be obtained at a qualiNed specialist workshop. Battery disconnection periods
The ASSYST PLUS service interval display can cal-
culat
e the service due date only when the battery
is connected. 
Display and note down the service due date
on t

he instrument display before disconnect-
ing the battery ( page 328). Maintenance Management
Notes about Maintenance Management
If the Maintenance Management service is activa-
t

ed, relevant data is automatically transferred to
the Mercedes-Benz customer centre.
The customer centre transmits the data to the
service partners that you have entered on the
Mercedes me website at: http://
www.mercedes.me. You will then receive individ-
ual recommendations regarding the maintenance
of your vehicle.
% The calculation of the optimal transmission
time of t

he maintenance request to the
service partner is subject to technical limita-
tions that may cause the maintenance recom-
mendation to be perceived as too early or too
late or not to be made at all. In this case, you
can conveniently arrange a maintenance
appointment with the customer centre via the
maintenance reminder in the multimedia sys-
tem.
% Maintenance Management and the mainte-
nance r

eminder in the multimedia system are
not available in every country. Contact a Mercedes-Benz service centre to Nnd
out
whe
ther this function is available in your coun-
try. Data transferred when using Maintenance Man-
ag

ement When the service is activated, relevant data is
aut

omatically transferred to determine the
required scope of maintenance as well as fault
detection and fault rectiNcation. Details on data
transfer can be found in the data protection infor-
mation for the Mercedes me connect services.
These can be found at: http://www.mercedes.me
under "My Mercedes me account", "Terms of use".
% The maintenance reminder in the multimedia
sy

stem is not available in all countries. Telediagnostics
Notes about Telediagnostics
%
This service is not available in all countries.
The vehicle can detect if certain wear parts need
t
o be replaced or if malfunctions have occurred in Maintenance and care
329

vehicle systems. If the Telediagnostics service is
activ ated, relevant data is automatically transmit-
ted to the manufacturer. If fault conditions are
detected by the vehicle system self-diagnosis, the
system transmits recommendations for action to
the Mercedes-Benz customer centre depending
on the fault detected. The customer centre trans-
mits the data to the service partner that you have
entered on the Mercedes me website at: http://
www.mercedes.me.
For selected faults, the notiNcation that a mal-
function has been detected may appear in the
multimedia system with a request to contact the
Mercedes-Benz Customer Centre. From this mes-
sage, a call can be made directly to the customer
centre for assistance.
% The transmission of a no
tiNcation to the multi-
media system depends on the country, vehi-
cle model and equipment and requires a fast
data connection, over which the service pro-
vider has no inOuence.
% Reliable fault detection is subject to technical
limit
ations. Therefore, only a limited selection
of faults can be detected and recommenda-
tions for action transmitted to the customer centre and the service partners. Mercedes-
Benz A
G is continuously working on the
expansion of this service. The fault detection
depends on the country, vehicle model and
equipment. Data transferred when using Telediagnostics
When the service is activated, relevant data is
aut

omatically transferred to determine the next
required scope of maintenance as well as fault
detection and fault rectiNcation.
Details on data transfer can be found in the data
protection information for the Mercedes me con-
nect services. These can be found at: http://
www.mercedes.me under "My Mercedes me
account", "Terms of use".
% The scope of the data transmitted depends on
t

he vehicle model and equipment. For techni-
cal reasons, not all data is available at all
times. Engine compartment
Active bonnet (pedestrian protection)
Operation of the active bonnet (pedestrian protec-
tion)
In cer

tain accident situations, the actuation of the
active bonnet reduces the risk of injury to pedes-
trians. The rear area of the bonnet is raised by
approximately 70 mm.
For the drive to the workshop, reset the actuated
active bonnet yourself (  page 330).
Aser the active bonnet has been actuated, pedes-
trian protection may be limited.
Have the full functionality of the active bonnet
restored in a qualiNed specialist workshop.
Resetting the active bonnet &
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 330
Maintenance and care


Allow the engine to cool down and only
t ouch component parts described in the
following. 
With your hand Oat, push do
wn active bonnet
1 in the area around the hinges on both
sides (arrows).
In doing so, the actuator is depressurised and
you may hear a hissing sound.
The engine bonnet must engage in position. 
If the active bonnet can be raised slightly at
t

he rear in the area of the hinges, repeat the
step until it engages correctly. Opening and closing the bonnet
&
DANGER Risk of f
atal injuries when carry-
ing out maintenance work during the
charging process
During the charging process, the high-voltage
on-boar
d electrical system is under high volt-
age. 
Do not perform any maintenance work
dur

ing the charging process. &
WARNING Risk of accident due t
o driving
with the bonnet unlocked
The bonnet may open and block your view. 
Never release the bonnet when driving. 
Before every trip, ensure that the engine
bonne

t is locked. &
WARNING Risk of accident and injur
y
when opening and closing the bonnet
The bonnet may suddenly drop into the end
position. There is a risk of injury for anyone in the
engine bonne

t's range of movement. 
Do not open or close the bonnet if there
is a per

son in the bonnet's range of
movement. &
WARNING Risk of bur
ns when opening the
bonnet
If you open the bonnet in the event of an over-
heat
ed engine or Nre in the engine compart-
ment, the following situations may occur:
= You may come into contact with hot gases.
= You may come into contact with other
escaping hot operating Ouids. 
Before opening the bonnet, allow the
engine t
o cool down. 
In the event of a Nr
e in the engine com-
partment, keep the bonnet closed and
call the Nre service. Maintenance and care
331

&
WARNING Risk of injur y due to moving
parts
Components in the engine compartment may
continue t
o run or start unexpectedly even
when the drive system is switched oM.
Observe the following if you must open the
bonnet: 
Switch oM t
he vehicle. 
Never touch the danger zones surround-
ing mo

ving components, e.g. the rotation
area of the fan. 
Remove jewellery and watches. 
Keep items of clothing and hair away
fr
om moving parts. &
WARNING Risk of injur
y from touching
components under voltage
The ignition system and the fuel injection sys-
t
em operate at high voltage. You could receive
an electric shock. 
Never touch ignition system or fuel injec-
tion sy

stem components when the vehi-
cle is switched on. The live components include the following, for
e

xample:
= Ignition coils
= Fuel injectors
= Electric lines to the ignition coils and the fuel
injectors &
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING Risk of injur
y from using the
windscreen wipers when the bonnet is
open
If the windscreen wipers start moving when
t
he bonnet is open, you could be trapped by
the wiper linkage. 
Always switch oM t
he windscreen wipers
and the vehicle Nrst if you need to open
the bonnet. 332
Maintenance and care

Opening the bonnet

To release the bonnet, pull on handle 1. 
Push yellow handle 1 on t he bonnet catch to
the les as far as it will go (palm downwards).
Lis the bonnet until it is automatically raised
by the pneumatic spring.
Closing the bonnet 
Lower the bonnet and let it drop from a height
of appr

oximately 20 cm. 
If the bonnet can still be lised slightl
y, open
the bonnet again and close it with a little force
until it engages correctly. Engine oil
Checking the engine oil level using the on-board
com

puter
Requirements: = The engine has been warmed up.
= The vehicle is parked on a level surface.
= The engine is running at idle speed.
= The bonnet is closed.
The engine oil level is determined during driving.
Determining the engine oil level can take up to
30 minutes with a normal driving style and even
longer with an active driving style. Maintenance and care
333

On-board computer:
4 Service 5
Engine oil level
One of t
he following messages will appear on the
instrument display:
= Engine oil level Measuring now : measurement
of the oil level is not yet possible. 
Repeat the request aser a maximum of
30 minut
es' driving.
= Engine oil level OK and t
he bar display for
indicating the oil level on the instrument dis-
play is green and is between "min" and "max":
the oil level is correct.
= Engine oil level Add 1,0 l and the bar display
for indicating the oil level on the instrument
display is orange and is below "min": 
Add 1 l of engine oil.
= Reduce engine oil level and t

he bar display for
indicating the oil level on the instrument dis-
play is orange and is above "max": 
Drain oM an
y excess engine oil that has been
added. To do so, consult a qualiNed specialist
workshop.
= For engine oil level turn on ignition 
Switch on the vehicle to check the engine oil
le

vel.
= Engine oil level System inoperative : The oil
le

vel sensor is defective or not connected. 
Consult a q
ualiNed specialist workshop.
= Engine oil level System currently unavail. 
Close the bonnet.
Topping up engine oil &
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING Risk of Nr
e and injury from
engine oil
If engine oil comes into contact with hot com-
ponent par
ts in the engine compartment, it
may ignite. 
Make sure that no engine oil is spilled
ne
xt to the Nller opening. 
Allow the engine to cool oM and t
hor-
oughly clean the engine oil from compo-
nent parts before starting the vehicle. *
NOTE Engine damag
e caused by an incor-
rect oil Nlter, incorrect oil or additives 
Do not use engine oils or oil Nlt
ers which
do not correspond to the speciNcations
explicitly prescribed for the service inter-
vals. 
Follow the instructions on the service
int

erval display for changing the engine
oil and observe the prescribed change
intervals. 
Do not use additives. 334
Maintenance and care

*
NOTE Damag e caused by topping up too
much engine oil Too much engine oil can damage the engine or
t

he catalytic converter. 
Have excess engine oil removed at a
q

ualiNed specialist workshop. %
Depending on driving style, the vehicle con-
sumes up t
o 0.8 litre of oil per 1000 km. The
oil consumption may also be higher than this
when the vehicle is new or if you frequently
drive at high engine speeds. 
Turn cap 1 anti-cloc
kwise and remove it. 
Top up the engine oil. 
Replace cap 1 and tur
n it clockwise until it
engages. 
Check the oil level again (  pag
e 333). Checking the coolant level
&
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING Risk of scalding fr
om hot cool-
ant
If you open the cap, you could be scalded. 
Let the motor cool down before opening
t
he cap. 
When opening the cap, wear protective
glo

ves and safety glasses. 
Open the cap slowly to release pressure. Maintenance and care
335


Park the vehicle on a level surface. 
Check the coolant temperature display on the
ins trument display.
The coolant temperature must be below 70°C. 
Slowly turn cap 1 anti-cloc
kwise to release
overpressure. 
Continue turning cap 1 anti-cloc
kwise and
remove it. The coolant level is correct in the following cases:
= If t

he engine is cold, the coolant is up to
marker bar 2.
= If the engine is warm, the coolant is up to
1.5 cm over marker bar 2. 
If necessary, r
eNll with coolant that has been
approved for Mercedes-Benz.
% Further information on coolant (  pag
e 398) Topping up the windscreen washer system
&
WARNING Risk of bur
ns from hot compo-
nent parts in the engine compartment
Certain component parts in the engine com-
par
tment can be very hot, e.g. the engine, the
cooler and parts of the exhaust system. 
Allow the engine to cool down and only
t
ouch component parts described in the
following. &
WARNING !


Remove cap 1 b y the tab. 
Top up the washer Ouid.
% Further information about the windscreen
w

asher Ouid ( page 399) Keeping the air/water duct free

Keep the area between the bonnet and the
windscr
een free of deposits, e.g. ice, snow or
leaves. Cleaning and care
Information on washing the vehicle in a car wash
&
WARNING Risk of an accident due t
o
reduced braking power aser washing the
vehicle
Braking ePciency is r
educed aser washing the
vehicle. 
Aser t
he vehicle has been washed, brake
carefully while paying attention to the
traPc conditions until braking power has
been fully restored. *
NOTE Damag
e from automatic braking If one of the following functions is activated,
t
he vehicle brakes automatically in certain sit-
uations:
= Active Brake Assist
= Active Distance Assist DISTRONIC
= HOLD function
= Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar situa-
tions: 
During towing. 
In a car wash. *
NOTE Damag
e due to unsuitable car wash 
Before driving into a car wash make sure
t

hat the car wash is suitable for the vehi-
cle dimensions. Maintenance and care
337