2018 MERCEDES-BENZ A-CLASS HATCHBACK Owners Manual

is
responsible for complying with road traf fic
re gulations and driving at a suitable speed.
In dif ficult conditions (e.g. unclear roads, nar row
lanes, wetro ad sur faces, snow or ice) or when
driving wi tha trailer, the speed adjustment made
by the sy stem may not alw ays be suitable. In
th ese situations the driver must inter vene
acco rdingly. &
WARNING Risk of accident in spi teof
ro ute-based speed adjustment
Ro ute-based speed adjustment might mal‐
function or be temp orarily una vailable in the
fo llowing situations:
R If map data is not up todate or available
R Ifyo u do not follow the selected route
guidance
R Ifth e set route is re-planned
R Inroad con stru ction areas
R When towing a trailer
R In bad weather or road conditions
R Ifth e accelerator pedal is depressed #
Adjust the speed tothe traf fic situation. Setting
route-based speed adjustment Re
quirements:
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
Multimedia sy stem:
, © .
Settings .
Assis-
tance .
Route speed adapt. #
Activate or deacti vate the function.
When the function is active, theve hicle
speed is adjus ted depending on thero ute
eve nts ahead.
% Further information on thero ute-based
speed adap tation (→ page 205). Ac
tive Steering Assist Fu
nction of Active Steering Assist Ac
tive Steering Assist assists the driver at
speeds up to210 km/h and helps the driver to
st ay inthe cent reofthe lane bymeans of mod‐
erate steering inter ventions. The sy stem orients
itself using de tected lane markings. Depending
on the speed driven, Active Steering Assist uses
th eve hicles ahead as a refere nce. If the de tec‐
tion of lane markings and vehicles ahead is
impaired, Active Steering Assist switches topas‐
sive mode. The sy stem does not pr ovide support
in thefo rm ofsteering inter ventions. 206
Driving and pa rking

R
The driver is requ ired tokeep their hands on
th esteering wheel at all times and be able to
inter vene at any time tocor rect the course of
th eve hicle and keep it in lane.
R The status of Active Steering Assist is dis‐
pla yed in thest atus bar of the multifunction
displa y.
Ste ering and touch de tection
The driver is requ ired tokeep their hands on the
st eering wheel at all times and tobe able to
inter vene at any time. The driver mu stexpect a
ch ange from active topassive mode or vice
ve rsa at any time. If
th e sy stem reaches a sy stem limitation or the
driver has not steered theve hicle for a consider‐
able period of time or has remo vedth eir hands
from thesteering wheel, the sy stem will,
depending on the situation, firs t alert the driver
with a visual warning. Display 1appears in the
multifunction displa y.Ifth e driver still does not
st eer theve hicle, or has still not take n hold of
th esteering wheel, a repeated warning tone
sounds in addition tothe visual warning mes‐
sage toremind the driver totake control of the
ve hicle.
The warning message does not appear or disap‐
pears if one of thefo llowing conditions are me t:
R The driver steers theve hicle.
R The driver presses a steering wheel button or
operates Touch Control.
Ac tive Steering Assist is only an aid. The driver is
re sponsible forth e dis tance totheve hicle in
front, forve hicle speed, for braking in good time
and forst ay ing in lane. Before changing lanes,
th e driver must make sure that the neighbouring
lane is free (glance over the shoulder). Sy
stem limitations
Ac tive Steering Assist has a limited steering tor‐
qu efo r lateral guidance. In some cases, the
st eering inter vention is not su fficient tokeep the
ve hicle in the lane or todrive past exits. Active
St eering Assist cann otprov ide the driver with
st eering assis tance at roundabouts, T-junctions,
junctions, tollst ations or turns, forex ample.
The sy stem may be impaired or may not function
in thefo llowing ins tances:
R In sno w,rain, fog, heavy spr ay, if there is
gl are, direct sunlight, greatlyvarying light
conditions, reflections or stro ng shado wson
th e car riag ew ay.
R Insuf ficient road illumination.
R The windsc reen in the area of the camera is
dirty, mis ted up, damaged or co vered.
R Absence of lane markings, or se veral unclear
lane markings, or if the markings change rap‐
idl y.
R The dis tance totheve hicle in front is too
small and the lane markings thus cannot be
de tected.
R The road is nar row and winding. Driving and parking
207

R
Obs tacles on the lane or projecting out into
th e lane.
The sy stem does not pr ovide assis tance in the
fo llowing conditions:
R On tight bends, roundabouts and when turn‐
ing.
R When towing a trailer.
R When actively changing lane without swit ch‐
ing on the turn signal. &
WARNING Risk of accident if Active
St eering Assist unexpectedly stops func‐
tioning
If th e sy stem limitations of Active Steering
Assist are reached there is no guarantee that
th e sy stem will remain active or will keep the
ve hicle in lane. #
Alw ayske ep your hands on thesteering
wheel and obser vethe tra ffic carefull y. #
Alw aysst eer theve hicle paying atten‐
tion totraf fic conditions. &
WARNING Risk of accident if Active
St eering Assist unexpectedly inter venes
A malfunction in the de tection of lane mark‐
ings and objects can occu r.
This could cause unexpected steering inter‐
ve ntion. #
Steer according totraf fic conditions. Ac
tivating/deactivating Active Steering
Assist
Re quirements:
R ESP ®
is activated, but is not inter vening.
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
Multimedia sy stem:
, © .
Settings .
Schnellzugriff
(Quick access) #
Select aAct. Steer. Asst . Fu
nction of Active Lane Change Assi st
% The following function is countr y-dependent
and only available in conjunction with the
Driving Assi stance Package.
Ac tive Lane Change Assi stsupports the driver
when changing lanes byapplying steering torque
if th e driver operates a turn signal.
Assis tance when changing lanes is pr ovided if all
th efo llowing conditions are me t:
R You are driving on a mo torw ay orroad with
multiple lanes in the direction of tr avel.
R The neighbouring lane is separated bya bro‐
ke n lane ma rking.
R Novehicle is de tected in the adjacent lane.
R The driven speed is between 80 km/h and
180 km/h.
R Active Lane Change Assi stis switched on in
th e multimedia sy stem.
R Active Steering Assist is switched on and
active. 208
Driving and parking

If no
vehicle is de tected in the adjacent lane and
a lane change is permit ted, thesteering wheel
symbol and the ar row are shown in green 2.
The Lane change to the left message appears,
fo rex ample. If Active Lane Change Assi sthas
been activated with the turn signal indicator but
a lane change is not immediately possible, the
st eering wheel symbol remains green and the
ar row appears grey 1 . When the lane change
suppo rtstarts, the turn signal indicator is auto‐
matically activated.
If th e assis tance graphic is acti vewhen you
ch ange lanes, an ar rowalso appears pointing
to wa rdsth e adjacent lane in the assis tance
graphic (→ page 210). If a lane
change is not possible, the ar row fa des
out af ter a few seconds and a new lane change
must be initiated. An immediate lane change is
on ly possible on mo torw ay sections without
speed limits.
If th e sy stem is impaired, Active Lane Change
Assi stmay be cancelled. If it is cancelled, the
Lane change cancelled message appears inthe
multifunction display and a warning tone sounds. &
WARNING Risk of accident from chang‐
ing lane toan occupied adjacent lane
Lane Chan geAssi stcannot al ways detect
clear lyifth e adjacent lane is free.
The lane change might be initiated although
th e adjacent lane is not free. #
Before changing lanes, make sure that
th e neighbouring lane is free and there
is no danger to otherroad users. #
Monitor the lane change. &
WARNING Risk of accident if Lane
Change Assi stunexpectedly stops func‐
tioning
If th e sy stem limitations for Lane Change
Assist ha vebeen reached, there is no guar‐
antee that the sy stem will remain active.
Lane Change Assist cannot then assist you
by applying steering torques. #
Alw ays monitor the lane change and
ke ep your hands on thesteering wheel.
Obser vethe tra ffic conditions and steer
and/or brake if necessar y. Sy
stem limitations
The sy stem limitations of Active Steering Assist
apply toActive Lane Change Assi st
( → page 206).
The sy stem may also be impaired or may not
function in thefo llowing situations:
R The sensors in there ar bumper are dirty,
damaged or co vered, for ins tance by a
st icke r or ice and sno w.
R The exterior lighting sho wsa malfunction. Driving and parking
209

Ac
tivating/deactivating Active Lane Change
Assi st
Multimedia sy stem:
, © .
Settings .
Assistance .
Act.
lane chan. assist #
Activate or deacti vate the function.
Fu nction of Active Eme rgency Stop Assist
If th e driver continues toigno rethewa rning to
put their hands on thesteering wheel, Active
Dis tance Assi stDISTRONIC reduces the speed.
If th e driver still does not respond, theBegin-
ning emergency stop message is shown inthe
multifunction displa y.The vehicle is decelerated
in stages toast andstill. Atspeeds below
60 km/h the hazard warning lights switch on
automaticall y.
When theve hicle is stationar y,thefo llowing
actions are car ried out:
R theve hicle is secured with the electric park‐
ing brake
R Active Dis tance Assi stDISTRONIC is ended
R theve hicle is unloc ked R
if possible, an emer gency call is placed to
th e Mercedes-Benz emer gency call centre
The driver can cancel the deceleration at any
time byper form ing one of thefo llowing actions:
R steering
R depressing the brake or accelerator pedal
R pressing a steering wheel button or operating
To uch Control
R activating or deactivating Active Dis tance
Assi stDISTRONIC Overvi
ewofActive Di stance Assist
DISTRO NIC displa ysinthe instrument clus‐
ter The assis
tance graphic and thest atus display
show thest atus of thefo llowing functions in the
instrument clus ter:
R Active Dis tance Assi stDISTRONIC
R Route-based speed adap tation
R Active Steering Assist Assistant display
1
Route-based speed adap tation (type of route
eve nt)
2 Vehicle ahead
3 Distance indica tor
4 Set specified di stance
5 Active Lane Change Assi stlane change dis‐
play 210
Driving and pa rking

Ac
tive Di stance Assist DISTRO NICstatus dis‐
play and route-based speed adaptation 1
Active Dis tance Assi stDISTRONIC selected,
set speci fied dis tance
2 Active Dis tance Assi stDISTRONIC deacti va‐
te d, speed stored 3
Active Dis tance Assi stDISTRONIC acti ve,
speed stored, no vehicle de tected (bright
ve hicle symbol)
4 Active Dis tance Assi stDISTRONIC acti ve,
speed stored, vehicle de tected (green vehi‐
cle symbol)
5 Active Dis tance Assi stDISTRONIC and route-
based speed adap tation acti ve, speed stored
% On mo torw ays or high-speed major roads,
th e green çvehicle symbol is displa yed
cyclically when theve hicle is ready topull
aw ay.
% Ifyo u depress the accelerator pedal be yond
th e setting of theAc tive Dis tance Assi st
DISTRONIC, the sy stem is switched topas‐
sive mode. The çsuspended message
appears on the multifunction displa y.
Speedome ter
The stored speed is highlighted on the speedom‐
et er. If the speed of theve hicle ahead or the
speed adjustment is less than thestored speed
due tothero ute event ahead, the segments in
th e speedome ter light up. Activation or deacti va‐
tion of Active Dis tance Assi stDISTRONIC, as we
ll as alterations in thestored speed and the
dis tance tobe maintained, are displa yed in the
individual control feedback of the multifunction
displa y.
Ac tive Steering Assist status display 1
Grey steering wheel: Active Steering Assist
switched on and passive
2 Green steering wheel: Active Steering Assist
switched on and active
3 Yellow steering wheel flashing: transition
from active topassive status (sy stem limita‐
tion de tected or prom pttothe driver to
actively con firm) Driving and pa
rking 211

During
the transition from the active topassive
st atus, symbol 3is shown as enlar ged and
fl ashes yello w. Once the sy stem is passive, sym‐
bol 1is shown as gr eyinthe multifunction dis‐
pla y. Hill
Start Assist Hill
Start Assist holds theve hicle for a short
time when pulling away on a hill under thefo l‐
lowing conditions:
R Vehicles with automatic transmission: the
transmission is in position hork.
R The electric pa rking brake is released.
This gives you enough time tomo veyour foot
from the brake pedal tothe accelera tor pedal
and depress it before theve hicle begins toroll
aw ay. &
WARNING Risk of accident and inju ry
due totheve hicle rolling away
Af ter a short time, Hill Start Assist no lon ger
holds theve hicle and it can rollaw ay. #
Therefore, swiftly mo veyour foot from
th e brake pedal tothe accelerator
pedal. Ne ver attem pttolea vetheve hi‐
cle if it is being held byHill Start Assist. HOLD function
HOLD function
The HOLD function holds
theve hicle at a stand‐
st ill without requ iring youto depress the brake
pedal, e.g. while waiting in traf fic.
Sy stem limitations
The HOLD function is only intended toprov ide
assis tance when driving and is not a su fficient
means of safeguarding theve hicle against rolling
aw ay when stationar y.
R The incline must not be greater than 30%. Ac
tivating/deactivating the HOLD function &
WARNING Risk of an accident due tothe
HOLD function being activated when you
lea vetheve hicle
If yo u lea vetheve hicle while only the HOLD
function is braking theve hicle, theve hicle
can rollaw ay inthefo llowing situations:
R Ifth ere is a malfunction in the sy stem or
in the po wer supply.
R Ifth e HOLD function is deactivated by
depressing the accelerator pedal or brake
pedal, e.g. byave hicle occupant. #
Alw ays deactivate the HOLD function
and secure theve hicle against rolling
aw ay before leaving theve hicle. 212
Driving and pa rking

*
NO
TEDama gefrom auto matic braking If one of
thefo llowing functions is switched
on, theve hicle brakes automatically in cer‐
ta in situations:
R Active Brake Assi st
R Active Dis tance Assi stDISTRONIC
R HOLD function
R Active Parking Assist
To avo id damage totheve hicle, deactivate
th ese sy stems in thefo llowing or similar sit‐
uations: #
During towing #
In a car wash Re
quirements:
R The vehicle is stationar y.
R The driver's door is closed or the seat belt on
th e driver's side is fastened.
R The engine is running or has been au tomati‐
cally switched off bythe ECO start/ stop
function. R
The electric parking brake is released.
R Active Dis tance Assi stDISTRONIC is deacti‐
va ted.
R The transmission is in position h,kori.
Ac tivating the HOLD function #
Dep ress the brake pedal and af ter a short
time quickly depress fur ther until theë
display appears in the multifunction displa y. #
Release the brake pedal.
Deactivating the HOLD function #
Depress the accelerator pedal topull away.
or #
Depress the brake pedal until theë dis‐
play disappears from the multifunction dis‐
pla y.
The HOLD function is deactivated in thefo llow‐
ing situations:
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
R The transmission is switched toposition j.R
The vehicle is secured with the electric park‐
ing brake.
In thefo llowing situations, theve hicle is held by
th e transmission position jorby the electric
parking brake:
R The seat belt is unfas tened and the driver's
door is opened.
R The drive sy stem is switched off.
R There is a malfunction in the sy stem or the
po we r supp lyis insuf ficient. St
art-off assi st Fu
nction of thest art-off assi st
The start-off assist enables optimal vehicle
acceleration from a standstill. Forth is, a suitably
high-grip road sur face is requ ired, the tyres and
ve hicle must also be in good condition.
Do not activate thest art-off assist on public
ro ads.
Be sure toobser vethe saf ety no tes and informa‐
tion on ESP ®
. Driving and parking
213