2021 MERCEDES-BENZ A-CLASS SALOON sensor

R
The transmission is in position h.
R The driver's door is closed.
R Che ckofthera dar sensor system has been
successfully comple ted.
R Parking Assist PARKTRONIC is not being used
to park theve hicle or toexit from a parking
space. #
T
To oper
o oper at
ate A
e A ctiv
ctiv e Dist
e Dist ance Assis
ance Assist t
DIS
DIS TR
TRONIC:
ONIC: pressthero ck er switches on the
stee ring wheel cont rol unit up or down tothe
desired position.
Switc
Switc hing be
hing be tw
tween A
een A ctiv
ctive Dist
e Dist ance Assis
ance Assist t
DIS
DIS TR
TRONIC and t
ONIC and t he limit
he limiter
er #
Press theI button.
A A ctiv ctiv ating t
ating t he v
he v ar
ariable limit
iable limit er or A
er or Activ
ctive Dist
e Dist ance
ance
Assis
Assist DIS t DISTR
TRONIC
ONIC #
T
To activ
o activ at
ate wit
e wit hout a st
hout a st or
ored speed:
ed speed: press
ro ck er switch 1upM or down N, or
select Jwiththe leT rock er switch.
or #
T
To activ
o activ at
ate wit
e wit h a st
h a st or
ored speed:
ed speed: selectJ
with the leT rock er switch. #
A
Activ
ctiv e Dist
e Dist ance Assis
ance Assist DIS t DISTR
TRONIC:
ONIC: remo ve
yo ur foot from the accelerator pedal.
The cur rent vehicle speed is stored and main-
ta ined (Active Distance Assist DISTRONIC) or
limited (variable limiter) bytheve hicle.
A
A dop
dop ting a det
ting a det ect
ected speed limit
ed speed limit #
Activate Active Distance Assist DISTRONIC. #
If a tra1c sign has been de tected and is dis-
pla yed in the inst rument clus ter: select J
with the leT rock er switch.
The maximum permissible speed on the tra1c
sign is adop ted as the stored speed. The vehi-
cle adapts its speed tothat of theve hicle in
front, but only up tothe stored speed.
Pulling awa
Pulling away wit
y wit h A
h Activ
ctiv e Dist
e Dist ance Assis
ance Assis t
t
DIS
DIS TR
TRONIC
ONIC #
Activate Active Distance Assist DISTRONIC
and remo ve yo urfoot from the brake pedal. #
Select Jwiththe leT rock er switch.
or #
Depress the accelerator pedal brie0y and
/rml y.
The functions of Active Distance Assist
DISTRONIC continue tobe car ried out.
Deactiv
Deactiv ating A
ating Activ
ctive Dist
e Dist ance Assis
ance Assist DIS t DISTR
TRONIC
ONIC Driving and parking
229
229

#
End the support byactively steering in
non-critical situations. #
Drive at an appropriate speed if there
are pedestrians close tothe path of your
ve hicle. Syst
Syst
em limits
em limits
Fu ll system per form ance is not yetav ailable for a
few seconds aTer switching on theve hicle or aTer
driving o..
If Ac tive Brake Assist is impaired or inoperative
due toa malfunction, theÄ warning lamp
appears in the Instrument Displa y.
The system may be impai red or may not function,
particular lyin thefo llowing situations:
R In sno w,rain, fog, heavy spr ay, if there is glare,
in direct sunlight or in greatly varying light
conditions.
R Ifth e sensors are dirty, misted up, damaged or
co vered.
R Ifth e sensors are impaired due tointer fere nce
from other radar sources, e.g. strong radar
re 0ections in multi-s tore y car par ks. R
If a loss of tyre pressure or a defecti vetyre
has been de tected and displa yed.
R In complex tra1c situations where objects
cannot alw ays be clear lyidenti/ed.
R If pedestrians or vehicles mo vequickly into
th e sensor de tection range.
R If pedestrians are hidden by other objects.
R Ifth e typical outline of a pedestrian cannot be
distinguished from the backg round.
R If a pedestrian is not de tected as such, e.g.
due tospecial clo thing or other objects.
R Ifth e driver's seat belt is not fastened.
R On bends wi tha tight radius.
% The Active Brake Assist sensors adjust auto-
matical lywhile a cer tain distance is being
driven aTer theve hicle has been deli vered.
Ac tive Brake Assist is una vailable or only par-
tially available during thete ach-in process.
A
A ctiv ctiv ating/deactiv
ating/deactiv ating A
ating Activ
ctive Br
e Br ak
ake Assist
e Assist
R
R eq
eq uir
uir ements:
ements:
R The vehicle is switched on. Multimedia system:
4 © 5
Settings 5
Assistance
5 Active Brake Assist #
Select the desired setting.
The setting is retained when the drive system
is next star ted.
Deactiv
Deactiv ating A
ating Activ
ctive Br
e Br ak
ake Assist
e Assist
% It is recommended that you alw ays lea ve
Ac tive Brake Assist acti vated. #
Select Off.
The distance warning function, the autono-
mous braking function and Evasive Steering
Assist are deactivated.
When theve hicle is next star ted, the middle
setting is automatically selected.
% IfAc tive Brake Assist is deactivated, theæ
symbol appears in the status bar of the Instru-
ment Displa y. Driving and parking
239 239

Se
Se
tting
tting Tr
Tra1c
a1c Sign Assist
Sign Assist
R
R eq
eq uir
uir ements:
ements:
R Onl
Only v
y v ehicles wit
ehicles wit h Dr
h Driving Assist
iving Assist ance P
ance Pack
ackag
age:
e:
Ac tive Distance Assist DISTRONIC and ECO
Assist must be acti vatedfo rth e automatic
adoption of speed limits.
Multimedia system: 4 © 5
Settings 5
Assistance
5 Traffic Sign Assist
A
A ctiv
ctiv ating or deactiv
ating or deactiv ating aut
ating automatic adop
omatic adop tion of
tion of
speed limits (onl
speed limits (onl y v
y vehicles wit
ehicles wit h Dr
h Driving Assist
iving Assist ance
ance
P
P ack
ack ag
age)
e) #
Select Adopt limit. #
Switch the function on or o..
The speed limits de tected byTra1c Sign
Assist are automatically adop tedby Active
Distance Assist DISTRONIC.
% If one of thefo llowing systems is activated,
th e de tected speed can be manually adop ted
as the speed limit:
R Active Distance Assist DISTRONIC
R Cruise control R
Variable limi ter
Fu rther information about Active Distance
Assist DISTRONIC: (/ page 228).
Displa
Displa ying det
ying det ect
ected
edtr
tra1c
a1c signs in t
signs in t he media dis-
he media dis-
play
play #
Select Display in head unit . #
Switch the function on or o..
Se
Se tting t
tting t he type of w
he type of w ar
arning
ning #
Select Visual & audible ,Visual orOff.
Se Se tting t tting t he w
he war
ar ning t
ning t hr
hreshold
eshold
This value de term ines the speed at which a warn-
ing is issued when exceeded. #
Select Warning threshold. #
Set the desired speed. Blind Spo
Blind Spo
t Assis
t Assist and At and A ctiv
ctive Blind Spo
e Blind Spo t Assis
t Assist witht with
e
e xit w
xit w ar
arning
ning F
F
unction of Blind Spo
unction of Blind Spo t Assis
t Assist and At and A ctiv
ctive Blind
e Blind
Spo
Spo t Assis
t Assist wit t with e
h exit w
xit w ar
arning
ning
Blind Spot Assist and Active Blind Spot Assist use
two lateral, rear-facing radar sensors tomonitor th
e area up to40 m behind and 3 m next toyour
ve hicle.
If a vehicle is de tected at speeds abo veappr ox-
imately 12 km/h and this vehicle subsequently
enters the monitoring range directly next toyour
ve hicle, thewa rning lamp in the outside mir ror
lights up red.
Pe rm anent status displ ayinthe inst rument clus-
te r:
R ¸ (gre y): sy stem is acti vated but inopera-
tive
R ¸ (gre en): system is activated and opera-
tional
If a vehicle is de tected close toyour vehicle and
yo u switch on the turn signal indicator in the cor-
re sponding direction, a double warning tone
sounds and there dwa rning lamp in the outside
mir ror 0ashes. If the turn signal indicator remains
switched on, all other de tected vehicles are indi-
cated only bythe 0ashing of there dwa rning
lamp.
If yo uove rtake a vehicle quickl y,no warning is
given. Driving and parking
243 243

&
W
WARNI NG
ARNI NGRisk of accident despite Blind
Spot Assist
Blind Spot Assist does not react tovehicles
approaching and overtaking you at a greatly
di.erent speed.
Blind Spot Assist cannot warndrivers in this
situation. #
Always pay careful attention tothe tra1c
situation and maintain a safe distance at
th e side of theve hicle. Obser
vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 213).
Exit w Exit w ar
arning
ning
The exitwa rning is an additional function of Blind
Spot Assist and can warnvehicle occupants about
approaching vehicles when leaving theve hicle
when stationar y. &
W
WARNI NG
ARNI NGRisk of accident despite exit
wa rning
The exitwa rning neither reacts tostationa ry
objects nor topersons or road users
approaching you at a greatly di.ering speed.
The exitwa rning cannot warndrivers in these
situations. #
Always pay particular attention tothe
tra1c situation when opening the doors
and make sure there is su1cient clear-
ance. If
th ere is a vehicle in the monitoring range, this is
indicated in the outside mir ror.If a vehicle occu-
pant opens the door on the side with thewa rning,
a wa rning tone sounds and thewa rning lamp in
th e outside mir ror starts to0ash.
This additional function is on lyavailable when
Blind Sp otAssist is active. When theex itwa rning
is activated, it can warnvehicle occupants for up
to thre e minutes aTer switching theve hicle o..
The exitwa rning is no longer available once the
wa rning lamp in the outside mir ror 0ashes three
times. The
exitwa rning is only an aid and not a substi-
tute forth e attention of vehicle occupants. The
re sponsibility for opening and closing the doors
and for leaving theve hicle remains with theve hi-
cle occupants.
Syst
Syst em limits em limits
Blind Spot Assist and Active Blind Spot Assist may
be limited in thefo llowing situations, in particular:
R ifth ere is dirt on the sensors or the sensors
are obscured
R in poor visibility, e.g. due tofog, heavy rain or
snow
R ifth ere are nar row vehicles, e.g. bicycles or
mo torbikes
R ifth ero ad has very wide or nar row lanes
R ifve hicles are not driving in the middle of their
lane
Wa rnings may be issued in er ror when driving
close tocrash bar riers or similar continuous lane
borders. Alw ays make sure that there is su1cient
distance tothe side forot her tra1c or obs tacles. 244
244
Driving and parking

Wa
rnings may be inter rupted when driving along-
side long vehicles, forex ample lor ries, for a pro-
longed time.
Blind Spot Assist is not operational when reve rse
ge ar is engaged.
Blind Sp otAssist and theex itwa rning are not
operational when a trailer is coupled totheve hi-
cle and the electrical connection has been cor-
re ctly es tablished.
The exitwa rning may be limited in thefo llowing
situations:
R when the sensors are co veredby adjacent
ve hicles in nar row parking spaces
R when people approach theve hicle
R intheev ent of stationary or slo wlymoving
objects
F
F unction of br unction of br ak
ake application (A
e application (A ctiv
ctive Blind Spot
e Blind Spot
Assis
Assis t)
t)
If Ac tive Blind Spot Assist de tects a risk of a side
impact in the monitoring range, a cou rse-cor rect-
ing brake application is car ried out. This is
designed tohelp youavo id a collision. The course-cor
recting brake application is availa-
ble in the speed range between app roximately
30 km/h and 200 km/h. &
W
WARNING
ARNING Risk of accident despi tebrake
application of Active Blind Spot Assist
A course-cor recting brake application cannot
alw ays pr event a collision. #
Always steer, brake or accelerate your-
self, especially if Active Blind Spot Assist
wa rnsyo u or makes a course-cor recting
brake application. #
Always maintain a safe dis tance at the
sides. If a course-cor
recting brake application occurs,
th ere dwa rning lamp 0ashes in the outside mir ror
and a warning tone sounds. In addition, display
1 indicating the danger of a side collision
appears in the Instrument Displa y.
In rare cases, the system may make an inappro-
priate brake application. This brake application
may be inter rupted at any time if you steer slightly
in the opposite direction or accelerate.
Syst
Syst em limits em limits
No tethe system limitations of Active Blind Spot
Assist; you may otherwise not recognise the dan-
ge rs ( / page 243).
Either a course-cor recting brake application
appropriate tothe driving situation, or none at all,
may occur in thefo llowing situations:
R Vehicles or obs tacles, e.g. crash bar riers, are
located on bo thsides of your vehicle.
R Ave hicle approaches too closely on the side.
R You ha veadop ted a sporty driving style with
high cornering speeds.
R You brake or accelerate signi/cant ly. Driving and parking
245
245

R
When driving with a trailer, the electrical con-
nection tothe trailer has been cor rectly es tab-
lished.
R If a loss of tyre pressure or a defective tyre is
de tected and displa yed.
If yo u deactivate theAc tive Lane Keeping Assist
wa rning and the lane markings cannot be clear ly
de tected, it is possible that no lane-cor recting
brake application take s place (/ page 248).
The system may be impaired or may not function
particular lyin thefo llowing situations:
R Ifth ere is poor visibility, e.g. due toinsu1cient
illumination of thero ad, highly variable shade
conditions, rain, sno w,fog or heavy spr ay.
R Ifth ere is glare, e.g. from oncoming tra1c, the
sun or re0ections.
R Ifth e windscreen in the area of the multifunc-
tion camera is dirty, or if the camera is misted
up, damaged or co vered.
R Ifth ere are no lane markings, or se veral
unclear lane markings are present for one
lane, e.g. around roadwor ks. R
Ifth e lane markings are worn, dark or co v-
ered.
R Ifth e distance totheve hicle in front is too
short and thus the lane markings cannot be
de tected.
R Ifth e lane markings change quickl y,e.g. lanes
branch o., cross one ano ther or mer ge.
R Ifth e car riag ewa y isvery nar row and winding.
R V Vehicles wit
ehicles wit h Dr
h Driving Assist
iving Assist ance P
ance Pack
ackag
age:
e: if
th era dar sensors in there ar bumper are dirty
or co vered in snow and an obstacle is de tec-
te d in your lane, no lane-cor recting brake
application take s place.
A
A ctiv
ctiv ating/deactiv
ating/deactiv ating A
ating Activ
ctive Lane K
e Lane K eeping
eeping
Assist
Assist
Multimedia system:
4 © 5
Settings 5
Quick access
5 Active Lane Keeping Assist #
Activate or deactivate the function. Se Se
tting A
tting A ctiv
ctive Lane K
e Lane K eeping Assist
eeping Assist
Multimedia system:
4 © 5
Settings 5
Assistance
5 Active Lane Keeping Assist
Se
Se tting t
tting t he sensitivity
he sensitivity
% The availability of this function is dependent
on the countr y. #
Select Standard, SensitiveorOff.
A
A ctiv
ctiv ating or deactiv
ating or deactiv ating t
ating the hap
he hap tic w
tic war
arning
ning #
Select Warning .
Ac tivate or deactivate the function. F
F
unction of adap
unction of adap tiv
tive dam
e dam ping adjus
ping adjustment tment Suspension with adaptive damping adjustment
continuously adjusts thech aracteristics of the
suspension dampers tothe cur rent ope rating and
driving conditions.
The damping is set individually for each wheel and
is a.ected bythefo llowing factors:
R thero ad sur face conditions
R vehicle load 248 248
Driving and parking

R
R
Red segments:
ed segments: obstacles at a very short dis-
ta nce of app rox. 0.3 m or less
Displa
Displa y of P
y of Par
arking Assis
king Assis t P
t PARK
ARK TR
TRONIC in t
ONIC in t he
he
head-up displ ay
head-up displ ay Optionall
y,obstacles de tected byParking Assist
PA RKTRONIC from a distance of app roximately
1.0 m in front 2and 0.6 m on the sides 3can
also be displa yed in the head-up displa y.
Syst
Syst em limits
em limits
Pa rking Assist PARKTRONIC does not necessarily
ta ke into account thefo llowing obstacles:
R Obstacles below the de tection range, e.g. per-
sons, animals or objects. R
Obstacles abo vethe de tection range, e.g.
ov erhanging loads, overhangs or loading
ra mp s of lor ries.
The sensors must be free of dirt, ice and slush.
Otherwise, they may not function cor rectl y.Clean
th e sensors regula rly, taking care not toscratch
or damage them (/ page 214).
V V ehicles wit
ehicles wit h tr
h trailer hitc
ailer hitc h:
h:Parking Assist
PA RKTRONIC is deactivated forth ere ar zone
when you establish an electrical connection
between your vehicle and a trailer.
Pr
Pr oblems wit
oblems wit h P
h Par
arking Assis
king Assis t P
t PARK
ARK TR
TRONIC
ONIC Example:
vehicles with 360° Camera When
rear segments 1or all- round segments
2 light up red and theé symbol appears in
th e Instrument Displa y,Pa rking Assist
PA RKTRONIC may ha vebeen deactivated due to
signal inter fere nce. Start theve hicle again and
ch eck if Parking Assist PARKTRONIC is working at
a di.erent location.
If a warning tone also sounds for appr oximately
two seconds everytime theve hicle is star ted, it
may be due toone of thefo llowing causes:
R The sensor
The sensor s ar s are dir
e dir ty
ty:
:clean the sensors and
obser vethe no tes on care of vehicle parts
(/ page 336).
R P
Par
ar king Assis
king Assis t P
t PARK
ARK TR
TRONIC has been deacti-
ONIC has been deacti-
v
v at
at ed due t
ed due t o a malfunction:
o a malfunction: restart theve hi-
cle. If the problem persists, consult a quali/ed
specialist workshop.
F
F unction of t
unction of t he passiv
he passive side im
e side impact prot
pact pr otection
ection
Pa ssive side impact pr otection is an additional
Pa rking Assist PARKTRONIC function which warns
th e driver about obstacles at the side of theve hi-
cle. A warning is issued when obstacles are
de tected between the front and rear de tection
ra nge. In order for an object on the side tobe 256
256
Driving and parking

de
tected, the sensors in the front and rear
bumper must /rst de tect the object while you are
driving past it.
During the parking procedure or manoeuvring,
objects are de tected as theve hicle drives past. If
yo u steer in the direction of a de tected obs tacle
and there is a risk of a lateral collision, a warning
is issued and the segments light up in colour in
th e displa y.
The segment colour changes depending on the
distance tothe de tected obs tacle:
R Y
Y ellow ellow :
:appr oximately 30 - 60 cm
R R
R ed:
ed: less than appr oximately 30 cm
In order for lateral, front or rear segments tobe
displa yed, theve hicle must /rst tr avel a distance
of at least half a vehicle's length. Once theve hicle
has tr avelled the length of theve hicle, all of the
lateral front and rear segments can be displ ayed. Pa
rking Assist PARKTRONIC displa y:vehicles
without a 360° Camera
1 Operational front and rear
2 Operational front, rear and sides
3 Obstacle de tected at the front right (yellow)
and rear (red) Pa
rking Assist PARKTRONIC displa y:vehicles
with a 360° Camera
1 Operational front and rear
2 Operational front, rear and sides
3 Obstacles de tected at the front right (red)
Sa ved obstacles on the sides are dele ted in the
fo llowing situations, forex ample:
R You park theve hicle and switch it o..
R You open the doors.
ATer the engine is restar ted, obstacles on the
sides must be de tected again before a new warn-
ing can be issued. Driving and parking
257
257