2018 MERCEDES-BENZ A-CLASS HATCHBACK sensor

Mercedes-Benz Genuine
Parts
+ ENVIRONMENTAL
NOTEEnvironmental
dama gecaused bynot using recycled
re conditioned components Daimler
AGoffers recycled reconditioned
components and pa rts with the same quality
as new parts. The same entitlement from the
implied warranty is valid as for new parts. #
Use recycled reconditioned compo‐
nents and pa rts from Daimler AG. *
NO
TEImpairment of the operating ef fi‐
ciency of there stra int sy stems from
ins talling accessory parts or from repairs
or we lding Airbags and seat belt
tensioners, as well as
control units and sensors forth ere stra int
sy stems, may be ins talled in thefo llowing
areas of your vehicle:
R doors
R door pillars R
door sills
R seats
R cockpit
R instrument clus ter
R centre console
R late ra lro of frame #
Do not ins tall accessory parts such as
audio sy stems in these areas. #
Do not car ryout repairs or welding. #
Have accesso ries retrofitted at a quali‐
fi ed specialist workshop. Yo
u could jeopardise the operating saf ety of your
ve hicle if you use parts, tyres and wheels as well
as accessories releva nt tosaf ety which ha venot
been appr ovedby Mercedes-Benz. Saf ety-re le‐
va nt sy stems, e.g. the brake sy stem, may mal‐
function. Only use Mercedes-Benz Genuine Parts
or parts of equal qualit y.Only use tyres, wheels
and accessories that ha vebeen specifically
appr ovedfo ryo ur vehicle model. Mercedes-Benz
tests original parts and con ver‐
sion parts and accessories that ha vebeen spe‐
cifically appr ovedfo ryo ur vehicle model forth eir
re liability, saf ety and suitabilit y.Despite ongoing
ma rket resear ch, Mercedes-Benz is unable to
assess other parts. Mercedes-Benz therefore
accepts no responsibility forth e use of such
parts in Mercedes-Benz vehicles, even if they
ha ve been of ficially appr oved or independently
appr ovedby ate sting centre.
Cer tain parts are only of ficially appr ovedfor
ins tallation or modification if they comply wi th
legal requirements. All Mercedes-Benz Genuine
Pa rts meet the appr oval requ irements. The use
of non-appr oved parts may in validate theve hi‐
cle's general operating pe rmit.
This is the case in thefo llowing situations:
R theve hicle type is dif fere nt from that for
which theve hicle's general operating pe rmit
wa s granted.
R other road users could be endangered.
R theex haust gas or noise le velge ts wo rse. General no
tes21

yo
ur vehicle as well as on possible vehi‐
cle damage. QR code
forre scue card
The QR code is secured in the fuel filler flap and
on the opposite side on the B-pillar. In theeve nt
of an accident, rescue services can use the QR
code toquickly find the appropriate rescue card
fo ryo ur vehicle. The cur rent rescue card con‐
ta ins the most impor tant information about your
ve hicle in a compact form , e.g. thero uting of the
electric lines.
Fu rther information can be obtained at http://
www.mercedes-benz.de/qr-code. Data
storage Electronic control units
Elect
ronic control units are fitted in your vehicle.
Some of these are necessary forth e safe opera‐
tion of your vehicle, while some assist you when
driving (driver assis tance sy stems). In addition,
yo ur vehicle pr ovides com fort and enter tainment functions, which are also made possible
byelec‐
tronic control units.
Elect ronic control units contain da tamemories
which cantemp orarily or permanently store
te ch nical information about theve hicle's operat‐
ing state, component loads, main tenance
re qu irements and tech nical events or faults.
In general, this information documents thest ate
of a component part, a module, a sy stem or the
sur roundings such as:
R operating states of sy stem components (e.g.
fl uid le vels, battery status, tyre pressure)
R status messages concerning theve hicle or
its individual components (e.g. number of
wheel revo lutions/speed, decele ration in
mo vement, lateral accele ration, display of
fast ened seat belts)
R malfunctions or defects in impor tant sy stem
components (e.g. lights, brakes)
R information on events leading tovehicle
damage
R system reactions in special driving situations
(e.g. airbag deployment, inter vention of sta‐
bility control sy stems) R
ambient conditions (e.g. temp erature, rain
sensor)
In addition toprov iding the actual control unit
function, this data assists the manufacturer in
de tecting and rectifying faults and optimising
ve hicle functions. The majority of this data is
te mp orary and is only processed in theve hicle
itself. Only a small portion of the data is stored
in theeve nt or fault memor y.
When your vehicle is serviced, tech nical da ta
from theve hicle can be read out byservice net‐
wo rkemplo yees (e.g. workshops, manufactur‐
ers) or third parties (e.g. breakdown services).
Services include repair services, maintenance
processes, warranty cases and quality assurance
measures, forex ample. The read out is per‐
fo rm ed via the legally prescribed port forthe
diagnostics connection in theve hicle. The
re spective service network locations or third
parties collect, process and use the data. They
document tech nical statuses of theve hicle,
assist in finding faults and impr oving quality and
are transmit tedto the manufacturer, if neces‐
sar y.Fu rthermore, the manufacturer is subject General no
tes27

Re
stra int sy stem functionality When
the ignition is switched on, a self-test is
per form ed, during which the6 restra int sys‐
te m wa rning lamp lights up. It goes out no later
th an a few seconds af terth eve hicle is star ted.
The components of there stra int sy stem are then
functional. Malfunctioning
restra int sy stem A malfunction has occur
red in there stra int sys‐
te m if:
R the6 restra int sy stem warning lamp does
not light up when the ignition is switched on
R the6 restra int sy stem warning lamp
lights up continuously or repeatedly during a
journey &
WARNING Risk of inju ryor fata l injury
due toa malfunction in there stra int sys‐
tem
If th ere stra int sy stem is malfunctioning,
re stra int sy stem components may be trig‐ ge
red unintentionally or might not be trig‐
ge red at all in theev ent of an accident. This
may af fect the seat belt tensioner or airbag,
fo rex ample. #
Have there stra int sy stem checked and
re paired immediately at a qualified spe‐
cialist workshop. Fu
nction of there stra int sy stem in an acci‐
dent How
there stra int sy stem works is de term ined by
th e se verity of the impact de tected and the type
of accident anticipated:
R Frontal impact
R Rear impact
R Side impact
R Onlyfor cer tain countries: rollo ver
The activation thre sholds forth e components of
th ere stra int sy stem are de term ined based on
th eev aluation of the sensor values measured at
va rious points in theve hicle. This process is pre-
em ptive in nature. The triggering/deployment of th
e components of there stra int sy stem must
ta ke place in good time at thest art of the colli‐
sion.
Fa ctors whi chcan only be seen and measu red
af te r a collision has occur red cann otplay a deci‐
sive role in airbag deployment, nor do they pro‐
vide an indication of airbag deployment.
The vehicle may be deformed significantly with‐
out an airbag being deplo yed. This is the case if
only parts which are relatively easily deformed
are af fected and thera te ofvehicle deceleration
is not high. Con versely, an airbag may be
deplo yedev en though theve hicle suf fers only
minor deformation. If very rigid vehicle parts
such as longitudinal members are hit, forex am‐
ple, this may result in suf ficiently high le vels of
ve hicle deceleration. Occupant saf
ety31

R
There are no objects between the seat, door
and door pillar (B-pillar).
R There are no hard objects, e.g. coat hangers,
hanging on the grab handles or coat hooks.
R There are no accessory parts, such as PNDs
(Personal Navigation Devices), mobile
phones or cup holders attached totheve hi‐
cle within the deployment area of an airbag,
e.g. on the cockpit, on doors, side windo ws
or side panelling.
In addition, no connecting cable, tensioning
st ra p or retaining stra p may be routed
th ro ugh or attached in the deployment area
of an airbag. Alw ays obser vethe accessory
manufacturer's ins tallation instructions, in
particular the information on suitable places
fo r ins tallation.
R There are no heavy, sharp-edged or fragile
objects in the poc kets of your clo thing. Store
such objects in a suitable place. Limited pr
otection from airbags &
WARNING Risk of inju rydue tomodifi‐
cations tothe airbag co ver
If yo u modify the co ver of an airbag or af fix
objects such as sticke rs to it,the airbag may
no longer function cor rectl y. #
Never modify the co ver of an airbag and
do not af fix objects toit. The ins
tallation location of an airbag is identified
by the AIRB AGsymbol (→ page37). &
WARNING Risk of inju ryor death due to
th e use of unsuitable seat co vers
Uns uitable seat co vers can obstruct or pre‐
ve nt the deployment of the airbags integra‐
te d into the seats.
Consequentl y,the airbags cann otprotect
ve hicle occupants as they are designed to
do. In addition, the operation of the auto‐
matic front passenger airbag shutoff could
be restricted. #
You should on lyuse seat co vers that
ha ve been appr oved forth e cor respond‐
ing seats byMercedes-Benz. &
WARNING Risk of inju rydue tomalfunc‐
tions of the sensors in the door panelling
Sensors tocontrol the airbags are located in
th e doors. Modifications or worknot per‐
fo rm ed cor rectly tothe doors or door panel‐
ling, as well as damaged doors, can lead to
th e function of the sensors being impaired.
The airbags might therefore not function
proper lyany more.
Consequent ly,th e airbags cann otprotect
ve hicle occupants as they are designed to
do. #
Never modify the doors or parts of the
doors. #
Alw ays ha vewo rkon the doors or door
panelling car ried out at a qualified spe‐
cialist workshop. Occupant saf
ety39

#
Tounlo cktheve hicle: touch the inner sur‐
fa ce of the door handle. #
Tolock theve hicle: touch sensor sur face
1 or2. #
Convenience closing: touch recessed sen‐
sor su rface 2until the closing procedure is
comple te. %
Further information on con venience closing
(→ page 78).
If yo u open theta ilgate from outside it is auto‐
matically unloc ked. Problems with KEYLESS-GO
Problem
Possible causes/consequences and M
MSolutions
Yo u can no lon ger lock or unlock the
ve hicle using KEYLESS-GO. Po
ssible causes:
R The key functions ha vebeen deactivated .
R The key bat tery iswe ak or dischar ged.
R There is inter fere nce from a po werful radio signal source.
R The key is faulty. #
Activate theke y functions (→ page 66). #
Check the battery using the battery check lamp and replace if necessary (→ page67). #
Use the emer gency keyto unlo ckor lock theve hicle (→ page67). #
Have theve hicle and keych ecked at a qualified specialist workshop. 72
Opening and closing

Priming/deactivating interior pr
otection Multimedia sy
stem:
, © .
Settings .
Schnellzugriff
(Quick access) #
Prime or deactivate Interior motion sensor.
Interior pr otection is primed again in thefo llow‐
ing cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select the
Vehicle menu under Settingstoprime or
deactivate interior pr otection. Opening and closing
87

Ad
aptive Highbeam Assist Ad
aptive Highbeam Assist function &
WARNING Risk of accident despi te
Ad aptive Highbeam Assist
Ad aptive Highbeam Assist does not recog‐
nise thefo llowing road users:
R Road users without lights, e.g. pedes‐
trians
R Road users with poor lighting, e.g.
cyclists
R Road users whose lighting is obstructed,
e.g. bya bar rier
On very rare occasions, Adaptive Highbeam
Assist may failto recognise other road users
with their own lighting, or may recognise
th em too late.
In this, or in similar situations, the automatic
main beam will not be deactivated or will be
activated despite the presence of other road
users. #
Alw ays obser vethe tra ffic carefully and
switch off the main beam in good time. Ad
aptive Highbeam Assist cannot take into
account road, weather or traf fic conditions.
De tection may be restricted if:
R in poor visibility, e.g. fog, heavy rain or snow
R there is dirt on the sensors or the sensors
are obscured
Ad aptive Highbeam Assist is on lyan aid. You are
re sponsible for adju sting theve hicle's lighting to
th e pr evailing light, visibility and traf fic condi‐
tions. Ad
aptive Highbeam Assist swit ches automati‐
cally between:
R Low beam
R High beam
At speeds abo ve30 km/h:
R If no other road users are de tected, the high
beam will be switched on automaticall y. Light and sight
127

The high beam switches off automatically:
R Atspeeds below 25 km/h.
R Ifot her road users are de tected.
R Ifstre et lighting is suf ficient.
At speeds abo veappr oximately 50 km/h:
R The headlamp range of the low beam is regu‐
lated automatically based on the dis tance to
ot her road users.
The sy stem's optical sensor is located behind
th e windscreen near theov erhead control panel.
Switching Adaptive Highbeam Assist on/off #
Toswitch on: turnthe light switch tothe
à position. #
Switch on the main beam using the combina‐
tion switch.
When the main beam is switched on auto‐
matically in the dar k,the _ indicator
lamp on the multifunction display comes on. #
Toswitch off: switch offthe main beam
using the combination switch. Ad
aptive Highbeam Assist Plus Ad
aptive Highbeam Assist Plus function &
WARNING Risk of accident despi te
Ad aptive Highbeam Assist Plus
Ad aptive Highbeam Assist Plus does not rec‐
ognise thefo llowing road users:
R Road users without lights, e.g. pedes‐
trians
R Road users with poor lighting, e.g.
cyclists
R Road users whose lighting is obstructed,
e.g. bya bar rier
On very rare occasions, Adaptive Highbeam
Assist Plus may failto recognise other road
users that ha velights, or may recognise
th em too late.
In this, or in similar situations, the automatic
main beam will not be deactivated or will be
activated despite the presence of other road
users. #
Alw ays obser vethe tra ffic carefully and
switch off the main beam in good time. Ad
aptive Highbeam Assist Plus cannot take into
account road, weather or traf fic conditions.
De tection may be restricted:
R in poor visibility, e.g. fog, heavy rain or snow
R ifth ere is dirt on the sensors or the sensors
are obscured
Ad aptive Highbeam Assist Plus is on lyan aid.
Yo u are responsible for adju sting theve hicle's
lighting tothe pr evailing light, visibility and traf‐
fi c conditions. 12 8
Light and sight