2021 MERCEDES-BENZ A-CLASS HATCHBACK overheating

Switc
Switc
hing t
hing t he seat heating
he seat heating on/o.
on/o. &
W
WARNING
ARNING Risk of bu rns due torepeatedly
switching on the seat heating
Re peatedly switching on the seat heating can
cause the seat cushion and seat backrest pad-
ding tobecome very hot.
In particular, the health of persons with limited
te mp erature sensitivity or a limited ability to
re act tohigh temp eratures may be a.ected or
th ey may even su.er burn-like injuries. #
Do not repeatedly switch on the seat
heating. To
protect against overheating, the seat heating
may be temp orarily deactivated aTer it has been
switched on repeatedl y.
* N
N O
OTE
TE Damage tothe seats caused by
objects or documents when the seat
heater is switched on When
the seat heater is switched on, over-
heating may occur due toobjects or docu- ments placed on
the seats e.g. seat cushions
or child seats. This could cause damage tothe
seat sur face. #
Make sure that no objects or documents
are on the seats when the seat heater is
switched on. R
R
eq
eq uir
uir ements:
ements:
R The po wer supply is switched on. #
Press button 1repeatedly until the desired
heating le vel is set.
Depending on the heating le vel, up tothree
indicator lamps will light up. If all indicator
lamps are o., the seat heating is switched o..
% The seat heating will automatically switch
down from theth re e heating le vels aTer 8, 10
and 20 minutes until the seat heating
switches o.. Switc Switc
hing t
hing t he seat v
he seat v entilation
entilation on/o.
on/o. R
R
eq
eq uir
uir ements:
ements:
R The po wer supply is switched on. Seats and st
owing
111
111

&
D
DAN
AN GER
GER Risk of fatal injuries caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vetheve hicle or, if present, the
stationa ryheater running in an enclosed
space without su1cient ventilation. &
W
WARNI NG
ARNI NGRisk of skidding and of an acci-
dent due toshiTing down on slippe ryroad
sur faces
If yo u shiT down on slippery road sur faces to
increase the engine braking e.ect, the drive
wheels may lose traction. #
Do not shiT down on slippery road sur fa-
ces toincrease the engine braking
e.ect. &
D
DAN
AN GER
GER Risk of fatal injury due topoison-
ous exhaust gases
If th eta ilpipe is bloc ked or su1cient ventila-
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter theve hi-
cle. This is the case if theve hicle gets stuck in
sno w,forex ample. #
Keep theta ilpipe and the area around
th eve hicle free from snow when the
ve hicle or the stationary heater is run-
ning. #
Open a wind owonthe side of theve hicle
fa cing away from the wind toensure an
adequate supply of fresh air. &
W
WARNING
ARNING Risk of accident due tothe
brake system overheating
If yo u lea veyour foot on the brake pedal when
driving, the brake system may overheat.
This increases the braking distance and the
brake system can even fail. #
Never use the brake pedal as a foot re st. #
Do not depress the brake pedal and the
accelerator pedal at the same time while
driving. *
N
NOOTE
TE Engine damage due toexcessively
high engine speeds The engine will be damaged if
you drive with
th e engine in theove rrev ving range. #
Do not drive with the engine in theove r-
re vving range. *
N
NOOTE
TE Causing wearto the brake linings by
permanently depressing the brake pedal #
Do not permanently depress the brake
pedal while driving. #
Touse braking e.ect of the engine, shiT
to a lo werge ar in good time. 170
170
Driving and parking

Se
Se
tting A
tting A TTENTION ASSI ST
TTENTION ASSIST
Multimedia system:
4 © 5
Settings 5
Assistance
5 Attention Assist
Se
Se tting op
tting op tions
tions #
Select Standard ,Sensitive orOff .
Sugg
Sugg es
esting a rting a r es
est art ar ea
ea #
Select Suggest rest area . #
Activate or deactivate the function.
If AT TENTION ASSIST de tects fatigue or
increasing lack of attention, it suggests a rest
area in the vicinity. #
Select the suggested rest area.
Yo u are guided tothe selected rest area. Cr
Cr
uise contr
uise control and limit ol and limit er
er F
F
unction of cr
unction of cr uise contr
uise controlol
Cruise control regula testh e speed totheva lue
selected bythe driver.
If yo u accelerate toove rtake, forex ample, the
stored speed is not dele ted. If youre mo veyour fo
ot from the accelerator pedal aTer overtaking,
cruise cont rol will resume speed regulation back
to the stored speed.
Yo u can store any speed abo ve20 km/h up tothe
maximum design speed or up tothe set winter
tyre limit.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 219).
Mer
Mer cedes‑ cedes‑ AMG v
AMG vehicles:
ehicles: cruise cont rol is availa-
ble up toa maximum speed of 250 km/h.
Displ ay
Display s in t
s in the Ins
he Instr trument Display
ument Display
R h (gre y): cruise control is selected but not
yet activated.
R h (gre en): cruise control is active.
A stored speed appears along with theh dis-
pla y.
% The segments extending from the cur rent
stored speed tothe end of the scale, or tothe
set winter tyre limit, light up in the speedome-
te r. Syst Syst
em limits em limits
Cruise control may be unable tomaintain the
stored speed on uphill gradients. The stored
speed is resumed when thegr adient evens out.
Change into a lo werge ar in good time on long and
steep downhill gradients. Take particular no teof
th is when driving a laden vehicle. By doing so, you
will make use of the engine's braking e.ect. This
re lie vesth e load on the brake system and pre-
ve nts the brakes from overheating and wearing
to oqu ickl y.
Do not use cruise control in thefo llowing situa-
tions:
R in tra1c situations which requ ire frequent
ch anges of speed, e.g. in heavy tra1c, on
winding roads
R on slippery roads. Accelerating can cause the
drive wheels tolose traction and theve hicle
could then skid.
R when visibility is poor
F
F unction of t
unction of t he limit
he limiter
er
The limiter restricts the speed of theve hicle. To
re duce the speed tothe set speed, the limiter
applies the brakes automaticall y. Driving and parking
229
229

with
your skin, eyes or clo thing, and do not
swallow it. Do not inhale any vapours. Keep
th e tyre sealant away from children.
Obser vethefo llowing if you come into contact
with the tyre sealant: #
Rinse o. the tyre sealant from your skin
using water immediatel y. #
If tyre sealant gets into your eyes, thor-
oughly rinse them using clean water
immediatel y. #
If tyre sealant has been swallo wed,thor-
oughly rinse out your mouth immediately
and drink plenty of water. Do not induce
vo miting and seek medical attention
immediatel y. #
Change out of clo thing which has come
into contact with tyre sealant immedi-
atel y. #
If an alle rgic reaction occurs, seek medi-
cal attention immediatel y. *
N NO
OTE
TE Overheating due tothe tyre in0ation
compressor running too long #
Do not runth e tyre in0ation compressor
fo r longer than ten minutes without inter-
ru ption. Comply with
the manufacturer's saf ety no tes on
th e stic ker on the tyre in0ation compressor.
Ha ve the tyre sealant bottle replaced in a quali/ed
specialist workshop every /ve years. #
Do not remo veany fore ign objects which ha ve
entered the tyre. #
A1x part 1ofthe TIREFIT stic kerto the
inst rument cluster within the driver's /eld of
vision. #
A1x part 2ofthe TIREFIT stic ker near the
va lve on the wheel with the defective tyre. #
Pull plug 4with the cable and hose 5out
of the tyre in0ation compressor housing. Breakdown assistance
351
351

In0ating
In0ating
t
t he emerg
he emerg ency spar
ency spar e wheel
e wheel *
N
NOOTE
TE Overheating due tothe tyre in0ation
compressor running too long #
Do not runth e tyre in0ation compressor
fo r longer than ten minutes without inter-
ru ption. R
R
eq
eq uir
uir ements:
ements:
The emer gency spa rewheel has been /tted cor-
re ctl y. ( / page 378)
Comply with the manufacturer's saf ety no tes on
th e stic ker of the emer gency spa rewheel and on
th e tyre in0ation compressor. #
Remo vethe stic ker with the label 80 km/h
from the tyre in0ation compressor housing
and a1x it tothe inst rument cluster within the
driver's /eld of vision. #
Remo vethe tyre in0ation compressor from the
st ow age space under the luggage compart-
ment 0oor . (/ page 350, 349) #
Pull /ller hose 1and plug 3out of the tyre
in0ation compressor housing. #
Insert plug 7of /ller hose 1inthe soc ket
on the tyre in0ation compressor and then turn
it until plug 7engages. #
Unscr ewthe cap from theva lve on the emer-
ge ncy spa rewheel. #
Screw union nut 2of /ller hose 1onto the
va lve. #
Make sure on and o. switch 4ofthe tyre
in0ation compressor is set to 00. #
Insert plug 3in a soc ket in your vehicle.
R Cigar ette lighter soc ket R
12 V soc ket: ( / page 128)
R Obser vethe no tes on the cigar ette lighter in
th e Digital Owner's Manual
R Obser vethe no tes on soc kets: (/ page 128) #
Press the start/s top button once toswitch on
th e po wer supply (/ page 165). #
Press on and o. switch 4onthe tyre in0a-
tion compressor to II.
The tyre in0a tion compressor is switched on.
The tyre is in0ated. The tyre pressure appears
on manom eter 5. #
Pump the tyre tothe speci/ed tyre pressure.
% The speci/ed tyre pressure is stated on the
label of the emer gency spa rewheel. #
When the speci/ed tyre pressure has been
re ached, press on and o. switch 4onthe
tyre in0ation compressor to 00.
The tyre in0a tion compressor is switched o.. #
Press the start/s top button toswitch o. the
po we r suppl y. #
Ifth e tyre pressure is higher than the speci/ed
pressure, press pressure release valve button Wheels and tyres
385
385

V
V
ehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: if a collapsible spare wheel is /t tedthe
tyre pressure monitoring system cannot func-
tion reliabl y.Fo r a few minutes aTer an emer-
ge ncy spa rewheel is /tted, the system may
still display the tyre pressure of there mo ved
wheel. Only restart the system again when the
collapsible spare wheel has been replaced
with a new wheel.
Be sure toalso obser vethefo llowing fur ther rela-
te d subjects:
R Notes on tyre pressure (/ page 369)
R Tyre pressure table (/ page 370) In0ating
In0ating
t
the collapsible spar
he collapsible spar e wheel
e wheel R
R
eq
eq uir
uir ements:
ements:
R Mount the collapsible spare wheel as descri-
bed (/ page 382).
R Remo vethe tyre in0ation compressor from the
st ow age space under the load compartment
0oor (/ page 350, 349). *
N
NOOTE
TE Damage tothe emer gency spa re
wheel when lo wering theve hicle Lo
we ring theve hicle without pr eviously in0at-
ing the emer gency collapsible spa rewheel can
damage its rim. #
In0a tethe emer gency collapsible spa re
wheel using the tyre in0ation compressor
before lo wering theve hicle. *
N
NOOTE
TE Overheating due tothe tyre in0ation
compressor running too long #
Do not runth e tyre in0ation compressor
fo r longer than ten minutes without inter-
ru ption. #
Pull connector 4and the hose out of the
housing. #
Unscr ewthe cap from theva lve on the col-
lapsible spare wheel. #
Screw union nut 1ofthe hose onto the
va lve.
% Make sure on and o. switch 3ofthe tyre
in0ation compressor is set to 00. #
Insert plug 4into the cigar ette lighter soc ket
or into a 12 V soc ket (/ page 128) in your
ve hicle. #
Switch on the po wer supply (/ page 165). Wheels and tyres
387
387

-
Athttps://be vo.mercedes-benz.com
- Inthe Mercedes-Benz BeVo App
R Ataqu ali/ed specialist workshop *
N
NOOTE
TE Overheating at high outside tempe r-
atures If an inappropriate coolant is used,
the engine
cooling system is not su1ciently pr otected
against overheating and cor rosion at high out-
side temp eratures. #
Only use coolant appr ovedby Mercedes-
Benz. #
Obser vethe inst ructions in the
Mercedes-Benz Speci/cations for Oper-
ating Fluids 320.1. Ha
ve the coolant regula rly re placed at a quali/ed
specialist workshop.
Proportion of antif reeze concentrate in the engine
cooling system:
R A minimum of 50% (antifreeze pr otection down
to about -37°C) R
A maximum of 55% (antif reeze pr otection
down to-45°C) N
No ot
tes on windscr
es on windscr een w
een washer
asher 0uid
0uid Obser
vethe no tes on operating 0uids
(/ page 393). &
W
WARNING
ARNING ‑ Risk of /re and injury due to
windscreen washer concent rate
Wi ndsc reen washer concent rate is highly 0am-
mable. It could ignite if it comes into contact
with hot engine component parts or the
ex haust system. #
Make sure that no windscreen washer
concent rate spills out next tothe /ller
opening. *
N NOOTE
TE Damage totheex terior lighting due
to unsuitable windscreen washer 0uid Unsuitable windscreen
washer 0uids may
damage the plastic sur face of theex terior
lighting. #
Only use windscreen washer 0uids which
are also suitable for use on plastic sur fa-
ces, e.g. MB SummerFit or MB WinterFit. *
N
NOOTE
TE Bloc ked spr aynozzles caused by
mixing windscreen washer 0uids #
Do not mix MB SummerFit and MB Win-
te rFit with other windscreen washer 0u-
ids. Do not use distilled or de-ionised
water. Other-
wise, the /ll le vel sensor may be triggered er rone-
ous ly.
Re commended windscreen washer 0uid:
R abo vefreezing point: e.g. MB SummerFit
R below freezing point: e.g. MB WinterFit
Fo rth e cor rect mixing ratio, referto the informa-
tion on the antifreeze container.
Mix washer 0uid with windscreen washer 0uid all
ye ar round. 402
402
Te
ch nical data

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Depress the brake pedal. #
Engage park position j. #
Consult a quali/ed specialist workshop.
Transmission Malfunction *The transmission is malfunctioning. The cause could be an overheated clutch or bloc kedge ars. #
Let the transmission cool down. #
Ifth e display message still appears following a restart, consult a quali/ed specialist workshop.
d Trans. oil overheated Drive
on with care *T
he transmission is overheating. When the display message is active, start-up and driving characteristics may be tem-
porarily impaired. #
Drive at low engine speed. #
Avoid sporty driving. #
Before pulling away on uphill gradients, let the transmission cool down until the display message disappears.
Parking lock inoperative
Apply the parking brake *T
he transmission is malfunctioning. The park position jcann otbe selected. #
Park theve hicle safel y. #
Use the electric parking brake tosecure theve hicle against rollingaway.
Teaching in transmission
Operate selector lever
Brake for XX seconds Risk
of vehicle rolling *T
he transmission is being taught in. There is a risk of theve hicle rolling away. #
Depress and hold the brake pedal until thete ach-in process has been comple ted.
The electric parking brake is applied automatically during thete ach-in process. #
Switch on theve hicle. 440 440
Displ
aymessages and warning/indicator lamps