MERCEDES-BENZ A-CLASS HATCHBACK 2018 Owners Manual

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

each time with
the conta cts onyour own
ve hicle firs t. #
Afterre moving the jump lead/charging
cable, close co ver1 of positive clamp 2.
Fu rther information can be obtained at a quali‐
fi ed specialist workshop. Re
placing the 12V battery #
Obser vethe no tes on the12 V battery
(→ page 444).
Mercedes-Benz recommends that you ha vethe
12 V battery replaced at a qualified specialist
wo rkshop, e.g. at a Mercedes-Benz Service
Centre.
Obser vethefo llowing no tes if youwa ntto
re place the battery yourself:
R Alw aysre place a faulty bat tery with a battery
which meets the specific vehicle require‐
ments.
The vehicle is equipped with an AGMtech nol‐
ogy battery (Absorbent Glass Mat). Fullve hi‐ cle functionality is only guaranteed with an
AG M batter y.Fo r saf etyre asons, Mercedes-
Benz recommends that you on lyuse bat ter‐
ies which have been tested and appr ovedfor
yo ur vehicle byMercedes-Benz.
R Carryover de tach able parts, such as vent
hoses, elbow fittings or term inal co vers, from
th e battery being replaced.
R Make sure that theve nt hose is al ways con‐
nected tothe original opening on the side of
th e batter y.
Fit any existing or supplied cell caps.
Otherwise, gases or battery acid could
escape.
R Make sure that de tach able parts are recon‐
nected in the same way. To
w- starting or towing away Pe
rm itted towing me thods Mercedes-Benz
recommends transporting your
ve hicle in the case of a breakdown, rath er than
to wing it away. Fo
rto wing, use a tow rope or tow bar with bo th
axles on the ground. Do not use tow bar sys‐
te ms. &
WARNING Risk of accident when towing
with steering wheel lock
Yo u will no lon ger be able tosteer theve hicle
if th esteering wheel lock is engaged. #
Alw ays switch on the ignition when tow‐
ing theve hicle with a tow cable or a tow
bar. *
NO
TEDama getotheve hicle due to tow‐
ing away incor rectly #
Obser vethe instructions and no tes on
to wing away. Breakdown assis
tance 449

Pe
rm itted towing me thods Ve
hicle equipment/ towing
me thod Bo
th axles on thegr ound Fr
ont axle raised Re
ar axle raised
Ve hicles with manual transmission Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
Ve hicles with automatic transmis‐
sion Ye
s, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
4MATIC vehicles Yes, maximum 50 km at 50 km/h No NoTo
wing with a raised axle: towing should be
per form ed byato wing compan y. To
wing theve hicle with bo thaxles on the
gr ound #
Obser vethe no tes on the permitted towing
me thods (→ page449). #
Makesure that the battery is connected and
ch arge d. Obser
vethefo llowing points when the battery is
dischar ged:
R the engine cann otbe star ted
R the electric parking brake cann otbe released
or applied
R vehicles with automatic transmission: the
automatic transmission cannot be shif tedto
position iorj. %
Vehicles with automatic transmission: if
th e automatic transmission cann otbe shif‐
te dto position i, orthe multifunction dis‐
play in the instrument clus ter does not show
anything, ha vetheve hicle transpor tedaw ay
( → page 452). A towing vehicle with lifting
equipment is requiredforve hicle transpor ta‐
tion. 450
Breakdown assi stance

*
NO
TEDama gedue to to wing away at
exc essively high speeds or over long dis‐
ta nces The driv
etra in could be damaged when tow‐
ing at excessively high speeds or over long
dis tances. #
Atowing speed of 50 km/h must not
be exc eeded. #
Atowing dis tance of 50 km must not be
exc eeded. &
WARNING Risk of accident when towing
a ve hicle which is too heavy
If th eve hicle being tow- star ted or towed
aw ay is heavier than the permissible gross
mass, thefo llowing situations can occur:
R theto wing eye may become de tach ed.
R the car/t railer combination may swer ve
or eve nove rturn. #
If ano ther vehicle is tow- star ted or
to we daw ay, its weight must not exceed th
e permissible gross mass of your own
ve hicle. If a
vehicle must be tow star ted or towe daw ay,
its permissible gross mass must not exceed the
permissible gross mass of theto wing vehicle. #
Information on the permissible gross mass of
th eve hicle can be found on theve hicle iden‐
tification plate (→ page 483). #
Vehicles with automatic transmission: do
not open the driver's door or front passenger
door, otherwise the automatic transmission
automatically shifts toposition j. #
Fittheto wing eye (→ page 453). #
Fasten theto w bar.
* NO
TEDama gedue toincor rect connec‐
tion #
Only connect theto w rope or tow bar to
th eto wing eyes. #
Deactivate the automatic locking mechanism
(→ page 73). #
Do not activate the HOLD function. #
Deactivate tow- aw ay protection (→ page 86). #
Deactivate Active Brake Assi st (→page 196). #
Vehicles with automatic transmission:
shift the automatic transmission toposition
i. #
Vehicles with manual transmission: shift
to neutral i. #
Release the electric parking brake. #
Switch on the ignition, otherwise thesteering
wheel lock may engage. &
WARNING Risk of accident due tolimi‐
te d saf ety-re lated functions during the
to wing process
Saf ety-re lated functions are limited or no lon‐
ge rav ailable in thefo llowing situations:
R the ignition is switched off.
R the brake sy stem or po werst eering sys‐
te m is malfunctioning. Breakdown assi
stance 451

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

To
wing eyesto rage location To
wing eye1 is under the load compartment
fl oor. Installing
theto wing eye #
Press the mark on co ver1 inwa rds and
re mo ve. #
Screw intheto wing eyeclockwise as far as it
will go and tighten.
Ve hicles with a trailer hitch: vehicles with a
trailer hitch do not ha veare ar brac ketfo rthe to
wing eye. Fasten theto w bar tothe trailer
hitch.
% Make sure that co ver1 engages in the
bumper when youre mo vetheto wing eye.
* NO
TEDama gedue toincor rect use of
th eto wing eye When a
towing eye is used toreco ver a vehi‐
cle, theve hicle may be damaged in the proc‐
ess. #
Only use theto wing eyeto to waw ay or
to w start theve hicle. To
w starting theve hicle (eme rgency engine
st art) Ve
hicles with automatic transmission
* NO
TEDama getothe automatic trans‐
mission due to tow-starting The automatic transmission may be damaged
in the process of tow- starting vehicles with
automatic transmission. Breakdown assis
tance 453

#
Vehicles with automatic transmission
must not be tow- star ted. #
Vehicles with automatic transmission must
not be tow- star ted.
Ve hicles with manual transmission #
Obser vethe no tes on towing away
( → page 450). #
If necessar y,allow the engine and exhaust
sy stem tocool down. #
Switch the ignition on. #
Enga gesecond gear. #
Release the electric parking brake. #
Tow- start theve hicle while the clutch pedal
is fully depressed. #
Slowly release the clutch pedal. #
Immediately shift toneutral if the engine
st arts. #
Pull over and stop theve hicle, paying atten‐
tion toroad and traf fic conditions. #
Remo vetheto w bar. #
Remo vetheto wing eye. #
Have theve hicle checked at a qualified spe‐
cialist workshop. Electrical fuses
Note
s on electrical fuses &
WARNING Risk of accident and inju ry
due to ov erloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher
amperage, the electric line could be overloa‐
ded.
This could result in a fire. #
Alw aysre place faulty fuses with speci‐
fi ed new fuses conta iningthe cor rect
amperage. *
NO
TEDama gedue toincor rect fuses Electrical components or sy
stems may be
damaged byincor rect fuses, or their func‐
tionality may be significant lyimpaired. #
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses mu
stbe replaced with fuses of the
same rating, which you can recognise bythe col‐
our and fuse rating. The fuse ratings and fu rther
information tobe obser ved are lis ted in the fuse
assignment diagram.
Fu se assignment diag ram: onthe fuse box in
th e engine compartment (→ page 455).
* NO
TEDama geor malfunctions caused
by moisture Moisture may cause dama
getothe electrical
sy stem or cause it tomalfunction. #
When the fuse box is open, make sure
th at no moisture can enter the fuse
box. #
When closing the fuse box, make sure
th at the seal of the lid is positioned cor‐
re ctly on the fuse box. 454
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

Closing
#
Check whe ther the seal is positioned cor‐
re ctly in the lid. #
Place the lid on the fuse box. #
Make sure that clamps 2engage. #
Tighten scr ews1. #
Close the bonn et. Opening and closing
the fuse box in the front
passenger foot we ll Obser
vethe no tes on electrical fuses
(→ page 454). Opening #
Lift carpet 1inthe direction of the ar row. #
Loosen scr ews2 and remo vethe fuse box
lid from theto p.
Closing #
Place the lid on the fuse box. #
Tighten scr ews2. #
Fold back carpet 1.456
Breakdown assis tance

Opening and closing
the fuse box in the load
compa rtment Obse
rveth e no tes on electrical fuses
(→ page 454). #
Open the load compartment floor
(→ page 110). Fu
se box 1is located in the cent reunderneath
th e load compartment floor. Breakdown assis
tance 457