2018 MERCEDES-BENZ A-CLASS HATCHBACK ECU

St
arting assi stance and charging the12 V
battery Re
quirements:
R The vehicle is secured with the electric park‐
ing brake.
R Automatic transmission: the transmission
is in position j.
R Manual transmission: the transmission is in
neutral.
R The ignition and all electrical consumers are
switched off.
R The bonn etis open. #
Slide co ver1 of positive clamp 2onthe
jump-s tarting connection point in the direc‐
tion of the ar row. #
Connect positive clamp 2onyour vehicle to
th e positive pole of the donor battery using
th e jump lead/charging cable. Alw ays begin
with positive clamp 2onyour ow nve hicle
fi rs t. #
During starting assi stance: start the
engine of the donor vehicle and run at idle
speed. #
Connect the negative pole of the donor bat‐
te ry and ear thpoint 3ofyour ow nve hicle
by using the jump lead/charging cable. Begin
with the donor battery firs t. #
During starting assi stance: start the
engine of your ow nve hicle. #
During thech arging process: start the
ch arging process. #
During starting assi stance: letthe engines
ru nfo r se veral minutes. #
During starting assi stance: before discon‐
necting the jump lead, switch on an electrical
consumer in your ow nve hicle, e.g. there ar
wind owheater or lighting.
When thest arting assis tance/charging process
is compl ete: #
First,re mo vethe jump lead/charging cable
from ear thpoint 3and negative pole of the
donor batter y,then from positive clamp 2
and positive pole of the donor batter y.Begin 448
Breakdown assis tance

R
the energy supply or the on-board electri‐
cal sy stem is malfunctioning.
When your vehicle is then towe daw ay, signif‐
icantly more ef fort may be requiredtosteer
and brake than is no rmally requ ired. #
Use a tow bar. #
Make sure that thesteering wheel can
mo vefreely, before towing theve hicle
aw ay. *
NO
TEDama gedue toexcessive tracti ve
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. #
Pull away slowly and smoo thly. Loading the
vehicle for transport #
Obser vethe no tes on towing away
( → page 450). #
Connect theto w bar totheto wing eye in
order toload theve hicle.
% You can also attach theto w bar tothe trailer
hitch. #
Vehicles with automatic transmission:
shift the automatic transmission toposition
i.
% Ve
hicles with automatic transmission:
th e automatic transmission may be loc ked in
position jintheeve nt of dama getothe
electrical sy stem. Toshift toi , pr ovide the
on-board electrical sy stem with po wer
( → page 448). #
Vehicles with manual transmission: shift
to neutral. #
Load theve hicle onto the transpor ter. #
Vehicles with automatic transmission:
shift the automatic transmission toposition
j. #
Vehicles with manual transmission:
engage firs t or reve rsege ar. #
Use the electric parking brake tosecure the
ve hicle against rolling away. #
Only secure theve hicle bythe wheels.
4MATIC vehicles/ vehicles with automatic
transmission #
Make sure that the front and rear axles come
to rest on the same transpor tation vehicle.
* NO
TEDama getothe driv etra in due to
incor rect positioning #
Do not position theve hicle abo vethe
connection point of the transport vehi‐
cle. 452
Breakdown assis tance

If
th e newly inser ted fuse also blo ws, ha vethe
cause traced and rectified at a qualified special‐
ist workshop, e.g. a Mercedes-Benz Service
Centre.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away.
R All electrical consumers are switched off.
R The ignition is switched off.
The electrical fuses are located in various fuse
bo xes:
R Fuse box in the engine compartment on the
left-hand side of theve hicle, when vie wed in
th e direction of tr avel (→ page 455)
R Fuse box in the front passenger foot we ll
(→ page 456)
R Fuse box in the cent reofthe load compart‐
ment (→ page 457) Opening and closing
the fuse box in the
engine compa rtment Requ
irements:
R You need a dry clo thand a sc rewdriver. Obser
vethe no tes on electrical fuses
(→ page 454).
Opening &
WARNING Risk of inju ryfrom using the
windscreen wipers while the engine bon‐
net is open
When the engine bonn etis open, and the
windscreen wipers are set in motion, you can
be trapped bythe wiper linkage. #
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. #
Open the bonn et. #
Remo veany existing moisture from the fuse
box using a dry clo th. #
Loosen scr ews1. #
Press clamps 2and lift the fuse box lid up
and out.
The fuse assignment diagram is in a recess on
th e side of the fuse box. Breakdown assis
tance 455

Ra
dio equipment appr oval of the ty repres‐
sure moni toring sy stem
Ra dio equipment appr oval numbers Argentina
CNC ID: H-20027 Countr
yRadio equipment appr oval
number
Ar ge ntina See ab ove
Au stra lia Brazil
MODELO:
TSSRE4A
AN ATEL: 05 181-17-06643
Es te equipamento opera em
caráter secundário, is toé, não
te m direito à pr oteção contrain‐
te rferência prejudicial, mesmo de
es tações do mesmo tipo e não
pode causar inter ferê ncia a si ste‐
mas operando em caráter pri‐
mário. Countr
yRadio equipment appr oval
number
European
Union Hiermit erklärt Huf Hülsbeck &
Für
stGmbH & Co. KG, dass der
Fu nkanlagentyp TSSRE4A &
TS SSG4G6 der Ri chtlinie
20 14 /53/EU entspricht.
Der vollständi geText der EU-Kon‐
fo rm itätserklärung ist unter der
fo lgenden In tern etadresse ver‐
fügbar: http://www.huf-
group.com/eudoc
Fr equenzband: 433,92 MHz
Abgestrahlte maximale Sende‐
leistung: <10 mW
Her steller:
Huf Elect ronics Br ette n GmbH
Ge we rbestr. 40 Wheels and tyres
463

Count
ryRadio equipment appr oval
number
75 015 Br etten
Germany
Indonesia 52 166/SDPPI/20 17
3533
Israel A.The use of this product does
not need a wireless operation
license.
B. The product does not include
an RF disturbance pr otection,
and should not disturb other
licensed products.
C. It is forbidden toreplace the
antenna or tomake any change
in this product. Count
ryRadio equipment appr oval
number
Jordan Kingdom of Jordan Type appr oval
fo rTy re Pressure Sensor and ECU
Manufacturer: Huf Elect ronics
Br ette n GmbH
Model: TSSRE4A
Ty pe Appr oval Numb er:
TRC/LPD/20 17/421
Model: TSSSG4G6
Ty pe Appr oval Numb er:
TRC/LPD/20 17/422
Mal aysia CIDF17000
184
Model: TSSRE4A & TSSSG4G6
RAQP/57A/08 17/S(17-2424) Countr
yRadio equipment appr oval
number
Morocco AGREE PAR L'ANRT MA ROC
Modele: TSSRE4A
Numero d'agrement: MR 14320
ANRT 20 17
Date d'agrement: 07/07/20 17
Modele: TSSSG4G6
Numero d'agrement: MR 14319
ANRT 20 17
Date d'agrement: 07/07/20 17
Mexico Model: TSSRE4A
IFETEL: RLVHUTS17-0806
Moldo va Oman TRA
R/4516/17
D100428 464
Wheels and tyres

Count
ryRadio equipment appr oval
number
業、科學及醫療用電波輻射性
電機設備之干擾。
Ac cording to“Administrative Reg‐
ulations on Low Powe rRa dio
Wa vesRa diated Devices”.
Wi thout permission granted by
th e DG T,any compan y,enter‐
prise, or user is not allo wedto
ch ange frequenc y,enhance
transmitting po wer or alter origi‐
nal characteristic as well as per‐
fo rm ance toa appr oved low
po we rra dio-frequency devices.
The low po werra dio-frequency
devices shall not influence air‐
craft security and inter fere legal
communications; If found, the
user shall cease operating imme‐
diately until no inter fere nce is
achi eved.
The said legal communications
means radio communications is Countr
yRadio equipment appr oval
number
operated in compliance with the
Te lecommunications Act.
The low po werra dio-frequency
devices must be susceptible with
th e inter fere nce from le gal com‐
munications or ISM radio wave
ra diated devices.
Thailand This telecommunication equip‐
ment con form sto NTC tech nical
re qu irement.
Ukraine Model:
TSSRE4A & TSSSG4G6
UA .TR .109.0 109-17 Countr
yRadio equipment appr oval
number
United
Arab Emi‐
ra tes
(UAE) TRA
Re
gis tere d No: ER5 7806/17
Dealer No: DA369 76/14
TRA
Re gis tere d No: ER5 7807/17
Dealer No: DA369 76/14
Vi etnam Huf Hülsbe
ck& Für stGmbH &
Co. KG
Model: TSSRE4A
No: C0 112200 717AF04A2 466
Wheels and tyres

R
Screw theva lve cap onto theva lve.
R Stow the deflated emer gency spa rewheel in
th e emer gency spa rewheel bag in the lug‐
ga ge compa rtment (→ page478).
Obse rveth efo llowing no tes on fitting an emer‐
ge ncy spa rewheel:
R Fitthe emer gency spa rewheel when it is
deflated (→ page475).
R Inflate the emer gency spa rewheel af terfit‐
ting it (→ page 478).
The maximum permissible speed with an emer‐
ge ncy spa rewheel fitted is 80 km/h.
Do not fit th e emer gency spa rewheel with sn ow
ch ains.
Re place the emer gency spa rewheel af ter six
ye ars at the latest, rega rdless of wear.
% Ve
hicles with a tyre pressure loss warn‐
ing sy stem: if an emer gency spa rewheel is
fi tted the tyre pressure loss warning sy stem
cann otfunction reliabl y.Only restart the sys‐
te m again when the emer gency spa rewheel
has been replaced with a new wheel. Ve
hicles with a tyre pressure monitoring
sy stem: if an emer gency spa rewheel is fit‐
te dth e tyre pressure monitoring sy stem can‐
not function reliabl y.Only restart the sy stem
again when the emer gency spa rewheel has
been replaced with a new wheel.
Ve hicles with a tyre pressure monitoring
sy stem: for a few minutes af ter an emer‐
ge ncy spa rewheel is fitted, the sy stem may
st ill display the tyre pressure of there mo ved
wheel.
Be sure toalso obse rveth efo llowing fur ther
re lated subjects:
R Notes on tyre pressure (→ page 459)
R Tyre pressure table (→ page 460) Re
moving the eme rgency spa rewheel The deflated eme
rgency spare wheel is secured
in the emer gency spa rewheel bag in the load
compartment. #
Obser vethe information on mounting tyres
(→ page 468). #
Open theta ilgate. #
Detach thefast ening stra ps. #
Unhook there taining spring hooks of thefa s‐
te ning stra ps from the brac kets. #
Remo vethe emer gency spa rewheel bag with
th e emer gency spa rewheel. #
Open the emer gency spa rewheel bag and
re mo vethe emer gency spa rewheel. Inflating
the emer gency spare wheel *
NO
TEOverheating due tothe tyre infla‐
tion compressor running too long #
Do not runth e tyre inflation compres‐
sor for longer than ten minu tes without
inter ruption. Re
quirements:
R Comply with the manufacturer's saf ety no tes
on thest icke r of the emer gency spa rewheel
and on the tyre inflation compressor.
R Remo vethe tyre inflation compressor from
th estow age space under the luggage com‐
partment floor (→ page 439). 478
Wheels and tyres

Display messages
Possible causes/consequences and M
MSolutions #
Consult a qualified specialist workshop immediatel y.
6
Left windowbag malfunc-
tion Consult work-
shop (Example) *T
he cor responding windowbag is malfunctioning (→ page31). &
WARNING Risk of inju ryor fata l injury due toa malfunction in the window airbag
The window airbag might be triggered unintentionally or might not be triggered at all in theeve nt of an accident
wi th high deceleration. #
Have the window airbag checked and repaired immediately at a qualified specialist workshop. #
Consult a qualified specialist workshop immediatel y.
Front-passenger airbag
enabled See Owner's Man-
ual *T
he front passenger airbag is enabled while theve hicle is in motion:
R even when a child, a small adult or an object weighing less than the sy stem weight thre shold is located on the
front passenger seat
R even when the front passenger seat is not occupied
The sy stem may de tect objects or forc es that are adding tothewe ight applied tothe seat. &
WARNING Risk of inju ryor fata l injury when using a child restra int sy stem while the front passenger airbag
is enabled
If yo u secure a child in a child restra int sy stem on the front passenger seat and the front passenger airbag is
enabled, the front passenger airbag can deploy in theev ent of an accident.
The child could be stru ck bythe airbag. Display messages and
warning/indicator lamps 509