Driver assistance systems
WARNING
The effectiveness of the ESC can be consider-
ably r
educed if other components and sys-
tems affecting driving dynamics are not main-
tained or are not functioning correctly. This
includes, among others, brakes, tyres and
other systems already mentioned.
● Remember that changing and fitting other
components
to the vehicle can affect opera-
tion of the ABS, BAS, ASL EDL and ESC.
● Changes to the vehicle suspension or using
unap
proved wheel/tyre combinations can af-
fect operation of the ABS, BAS, ASL EDL and
ESC, as well as their effectiveness.
● Likewise, the effectiveness of ESC depends
on the use of s
uitable tyres ››› page 284. Note
● To en s
ure that the ESC and ASR work prop-
erly, all four wheels must be fitted with iden-
tical tyres. Any differences in the rolling radi-
us of the tyres can cause the system to re-
duce engine power when this is not desired.
● If a malfunction should occur in the ABS,
the ESC, EDL and ASR w
ill also be out of ac-
tion.
● Noises may be heard while any of the
above sy
stems are operating. Switching ASR on and off
Fig. 205
Detailed view of the centre console:
b utt
on u
sed to switch ASR on and off (vehi-
cles with ESC) The electronic stability control ESC consists
of
ABS, EDL
and ASR and on
ly works when
the engine is running.
The ASR can be switched off while the engine
is running by pressing the OFF
› ›
› Fig. 205
b
utton. The ASR (and similar) is only switch-
ed off when the required traction is not ob-
tained:
● When driving through deep snow or on
loose grou
nd (gravel, etc.).
● When “freeing” a trapped vehicle.
Turn the ASR bac
k on by pressing the but-
ton OFF
›
› ›
Fig. 205
. Start assist systems
Introduction WARNING
The intelligent technology in the start assist
sys t
ems cannot change the laws of physics.
The improved comfort provided by start as-
sist systems should not prompt you to take
risks.
● Unintentional movements of the vehicle
coul
d cause serious injury.
● The start assist systems are not a replace-
ment for driv
er awareness.
● Always try to adapt the speed of the vehi-
cle and
your style of driving to the condition
of the ground or the road and to weather and
traffic conditions.
● The start assist system cannot keep the ve-
hicle s
tationary in all conditions on a gradi-
ent or cause it to brake on steep downhill
gradients, e.g. if the road is slippery or icy. 205
Technical data
Advice
Operation
Emergencies
Safety
Operation
Auto Hold function* Fig. 206
Detailed view of the centre console:
Aut o Ho
l
d button The control lamp on the button switches on
when the Aut
o Ho
l
d function is on.
When the Auto Hold function is on, this helps
the driver if they must regularly stop the vehi-
cle or if they must stop with the engine run-
ning for prolonged periods, for example, on
hills, before a traffic light or in traffic jams
with continuous stopping and starting.
The Auto Hold function automatically pre-
vents the vehicle from rolling away acciden-
tally when at a standstill, without the driver
having to keep his/her foot on the brake ped-
al.
When the system that detects that the vehi-
cle has stopped, the Auto Hold keeps the ve-
hicle at a standstill. The brake pedal can be
released. If the driver presses the brake pedal briefly or
the accel
erator to start off, the Auto Hold
function releases the brake once more. The
vehicle moves according to the gradient.
If any of the conditions necessary for the Au-
to Hold function change while the vehicle
stopped, the system is turned off as is the in-
dicator on the button ››› Fig. 206. The elec-
tronic parking brake engages where necessa-
ry to park the vehicle safely ››› .
C ondition
s
for keeping the vehicle at a
standstill with Auto Hold:
● The driver door must be closed.
● The driver seat belt must be buckled.
● The engine must be running.
● The ASR system is switched on
›››
page 187.
Automatically engaging and disengaging the
Auto Hold function
If the Auto Hold function was engaged with
the AUTO HOLD button before disengaging the
ignition, the f u
nction w
ill automatically re-
main engaged after the ignition is re-engag-
ed.
If the Auto Hold function was not engaged, it
will automatically remain disengaged after
the ignition is engaged. Permanent Auto Hold connection
The Auto Hol
d function must be switched on
every time the engine is started. However, to
switch the Auto Hold function on permanent-
ly, the mark must be switched on in the Set-
tings menu, “Autohold” submenu
››› page 26.
Auto Hold works automatically under the fol-
lowing conditions:
All points must be fulfilled simultaneously
››› :
Manual gearboxAutomatic gearbox
1.If the vehicle is kept at a standstill using the brake
pedal on a flat or a slope.
2.The engine must be “running smoothly”.
3.On a slope, the 1st gear
is engaged uphill or the
reverse gear is engaged
for a downhill. The
clutch must be held
down.A gear for driving is se-
lected from R, D or S.
Upon accelerating and
pressing in the clutch
simultaneously, the
brake releases gradual-
ly.Upon accelerating, the
brake releases gradual-
ly. 206
Driver assistance systems
Auto Hold turns off automatically under the
f o
l
lowing conditions:
Manual gearboxAutomatic gearbox
1.If one of the conditions mentioned in table on
page 206 changes.
2.If the engine is “not running regularly” or if there is a malfunction.
3.When changing to idle
speed.If the selector lever is
placed in neutral (N).
4.If the engine is turned
off or stalls.If the engine is switch-
ed off.
5.If the driver accelerates
while pressing the
clutch in.If the vehicle is acceler-
ated.
6. When one of the wheels
has minimal contact
with the ground (e.g. on
uneven ground).WARNING
The Auto Hold technology is limited by the
la w
s of physics. The improved comfort provi-
ded by Auto Hold should never prompt you to
take risks.
● Never leave the vehicle running and with
the Auto Hol
d function switched on.
● Auto Hold cannot always stop the vehicle
uphill
and downhill (e.g. if the ground is slip-
pery or frozen). CAUTION
Before entering an automatic car wash, al-
wa y
s switch the Auto Hold function off, as it
could be damaged when the electronic park-
ing brake automatically engages. Start-Stop Function*
Fig. 207
Detailed view of the centre console:
St ar
t
-Stop function button With the Start-Stop system enabled, the en-
gine i
s
aut
omatically stopped when the vehi-
cle is at a standstill. The engine restarts auto-
matically when required.
The function is enabled automatically when-
ever the ignition is switched on. The instru-
ment panel displays information on the cur-
rent status. Vehicles with a manual gearbox
● When the vehicle is at a standstill, leave it
in neutral and t
ake your foot off the clutch.
The engine switches off.
● Simply depress the clutch pedal to move
off again.
V
ehicles with an automatic gearbox
● When the vehicle is at a standstill, depress
the brake or k
eep it pressed down. The en-
gine switches off.
● The engine will start again as soon as you
rele
ase the brake pedal.
● With the selector lever set to position P, the
engine wi
ll not start until a range of gears is
selected or the accelerator pedal is de-
pressed.
Important conditions for the engine to auto-
matically switch off
● The driver seat belt must be buckled.
● The driver door must be closed.
● The bonnet must be closed.
● The factory-fitted towing bracket must not
be electrical
ly connected to a trailer.
● A minimum engine temperature has been
reac
hed.
● The steering wheel must not be turned
more than 270 de
grees.
● The vehicle has moved since the last stop. »
207
Technical data
Advice
Operation
Emergencies
Safety
Operation
● In v
ehic
les with Climatronic: the tempera-
ture inside the vehicle is within the pre-set
temperature range.
● The temperature set is neither very high nor
very
low.
● The air conditioning defrost function is not
switc
hed on.
● In vehicles with Climatronic: the blower has
not been manual
ly set to a high speed.
● The power level of the vehicle's battery is
sufficient
.
● The vehicle's battery temperature is neither
too high nor too lo
w.
● The vehicle is not on a steep gradient or
slope.
● The front
wheels are not overly turned.
● The heated windscreen is not switched on.
● Reverse gear is not engaged.
● The park assist system is not switched on.
Conditions
for automatically restarting the
engine
The engine may automatically restart under
the following conditions:
● If the vehicle interior is too hot or too cold.
● If the vehicle moves.
● If the vehicle's battery voltage drops. Conditions requiring the key to restart the
engine
The engine mu
st be started manually under
the following conditions:
● If the driver unbuckles his/her seat belt.
● If the driver door is opened.
● If the bonnet is opened.
● In vehicles with a manual gearbox: if a gear
has
been selected.
Switching Start-Stop mode on and off man-
ually
● Press the button on the centre console
› ›
›
Fig. 207.
● The button will light up when the Start-Stop
function i
s switched off.
The engine will start immediately if the vehi-
cle is in Stop mode when it is switched off
manually. WARNING
The brake servo and the power steering do
not w ork
when the engine is switched off.
● Never allow the vehicle to move when the
engine is
switched off. CAUTION
Using the Start-Stop function for a long peri-
od at v
ery high outside temperatures could
damage the vehicle's battery. Note
● In some ca se
s, you may have to restart the
vehicle using the key. Observe the corre-
sponding message on the instrument panel
display.
● If the steering wheel is turned more than
270°, Stop w
ill not function; however, the an-
gle of steering wheel turn does not affect
starting the vehicle. Parking distance warning sys-
t
em*
Intr oduction The parking distance warning system assists
the driv
er when p
ark
ing. When the vehicle
approaches an obstacle, forwards or back-
wards, an intermittent audible warning will
be heard, higher or lower depending on the
distance. The shorter the distance, the short-
er the intervals between tones. If the vehicle
is too close to the obstacle, the audible warn-
ing becomes constant.
If you continue to approach an obstacle when
the sound is continuous, this means the sys-
tem can no longer measure the distance.
The sensor system on the bumpers transmit
and receive ultrasound. Using the ultrasound
signal (transmission, reflection from the ob-
stacle and reception), this system
208
Operation
tones. If the vehicle is too close to the obsta-
c l
e, the audib
le warning becomes constant.
Switching the parking distance warning sys-
tem on and off
● Press the button
›››
Fig. 208
when the
ignition i
s switched on.
● Automatic on: select r
everse gear.
● Automatic off: drive fa
ster than 15 km/h
(9 mph).
The button lights up when the function is
switched on.
Things to note on the parking distance warn-
ing system
● The parking distance warning system
sometimes r
egisters water on the sensors as
an obstacle.
● If the distance does not change, the warn-
ing sign
al will sound less loudly after a few
seconds. If the continuous signal sounds, the
volume will remain constant.
● When the vehicle moves away from the ob-
stac
le, the beeping sound automatically
switches off. On approaching the obstacle
again, the beeping sound will automatically
switch back on.
● If the electronic parking brake is engaged
or the selector l
ever is set to P, no audible
warning will be emitted. ●
Your tec
hnical service centre can adjust the
volume of the warning signals. Note
If the parking distance warning system is
fau lty
, a constant audible warning will be
emitted the first time it is switched on and
the button will flash. Switch the parking dis-
tance warning system off using the button
and take the vehicle to a specialised work-
shop to have the system checked as soon as
possible. Optical parking system* (OPS)
Fig. 210
On-screen OPS display: A has de-
t ect
ed an o
bstacle in the collision zone; B has detected an obstacle in the segment;
C zone recorded behind the vehicle. Fig. 211
On-screen OPS display: A has de-
tect ed an o
bstacle in the segment; B restric-
ted ar e
a in front of the vehicle. The optical parking system is an accessory to
the P
ark
in
g distance warning system
››› page 209 and the park assist system
››› page 211.
The zone recorded by the sensors in front of
and behind the vehicle is displayed on the
factory-fitted radio or navigation system
screen. Any obstacles are displayed in rela-
tion to the vehicle ››› .
FunctionNecessary operations
Switching the
display on:Switch on the parking distance
warning system
››› page 209 or the
park assist system ››› page 211. The
OPS switches on automatically. 210
Driver assistance systems
Fig. 213
Gap detected: engage the reverse
g e
ar t
o park (parallel or nose/tail to the kerb) Preparing to park
● The Traction control system ASR must be
t urned on ›
›
› page 187.
● Parallel parking: pres
s the button at
s peed
s
up to 50 km/h (31 mph) once. When
the function is enabled, the button
››› Fig. 212 will light up. ●
Perpendicu
lar parking: press the button at speeds up to 50 km/h (31 mph) tw
ic
e .
When the function is enabled, the button
››› Fig. 212 will light up.
● If necessary, press the button once
mor e t
o c
hange parking mode.
● Apply the turn signal for the side on which
a gap is
to be detected for parking. The in-
strument panel displays the side correspond-
ing to the road.
Parking
● Parking parallel to the road: drive next
to
the gap at a speed of no more than 40 km/h
(25 mph) and at a distance of between 0.5 m
and 2 m.
● Parking perpendicular to the road: drive
next
to the gap at a speed of no more than
20 km/h (12 mph) and at a distance of be-
tween 0.5 m and 2 m.
● The best parking results will be achieved if
you pos
ition the vehicle as parallel as possi-
ble to the line of parked cars or the kerb.
● When a suitable parking place is displayed
on the instrument
panel, stop and select re-
verse gear.
● Follow the instructions given on the instru-
ment panel
display
● Then, release the steering wheel when the
warning s
ignal sounds ››› : The system
will move the steering wheel! Ob-
serve the surrounding area. ●
Ob
ser
ve the surrounding area and acceler-
ate carefully at a maximum of 7 km/h
(4 mph).
● The park assist system is only r
esponsible
for moving the steering wheel during the ma-
noeuvre. The driver applies the accelerator,
the clutch, the gears and the brake.
● Follow the instructions given by the park
ass
ist system until the manoeuvre is comple-
ted.
● The park assist system steers the vehicle
forw
ards and backwards until it is in a
straight position in the parking space.
● The manoeuvre is complete when the corre-
sponding indic
ation is given on the instru-
ment panel display.
Stopping the parking manoeuvre
The park assist system stops the manoeuvre
in advance in the event of one of the follow-
ing:
● Press button .
● Driving faster than 7 km/h (4 mph).
● The driver moves the steering wheel.
● The parking manoeuvre has not been com-
p l
et
ed after 6 minutes since the park assist
system was activated.
● A sliding door is opened. To restart the ma-
noeuvr e, c
lose the sliding door and press the
button again.
»
213
Technical data
Advice
Operation
Emergencies
Safety
Operation
● Ther e i
s
a system malfunction (system tem-
porarily unavailable).
● The ASR system is switched off or the ASR
or ESC i
s working. WARNING
The steering wheel turns quickly by itself
when park in
g using the park assist system.
Placing your hand between the steering
wheel spokes could lead to injuries. Note
● The park a
ssist system has its limitations.
For example, it is not possible to park on
tight bends using the park assist system.
● Even if the park assist system recognises
that ther
e is not enough space for parking
the vehicle, the instrument panel display will
still show this place. In this case, the parking
manoeuvre should not be requested.
● Changing gears between forward and re-
verse g
ears before indicated (that is, before
the signal from the parking sensor system)
the parking results may not be ideal.
● For parallel parking (parallel to the road), a
sound wi
ll tell the driver when they must
change from forward gears to reverse; the
signal from the parking sensor system does
not indicate changes of direction.
● The park assist can also be activated after-
ward
s, if you pass close to a parallel parking
space at a maximum of 40 km an hour
(25 mph) or close to be perpendicular parking space at about 20 km an hour (12 mph) then
pre
s
s the button .
● The progress bar on the screen of the in-
strument p
anel shows a display of the rela-
tive distance to be covered.
● When the Park Assist system is turning the
steerin
g wheel of the stopped vehicle the
symbol is also displayed. Press on the
brake pedal so that the steering can turn with
the vehicle at a standstill and thus reduce the
number of manoeuvres.
● A “suitable” parking space length is at
lea
st 1.1 m greater than the length of the ve-
hicle.
● If the results of the park assist system are
not as
good after changing the wheels, the
system must memorise the perimeter of the
new wheels. This process is performed auto-
matically while the vehicle is in motion. To
help this process, turn slowly (at less than
20 km/h [12 mph]), e.g. in an empty car park. Leaving a parking space using the
P
ark
As
sist system Driving off
● Switch on the engine.
● Press button . When the function is ena-
b l
ed, the b
utton ››› Fig. 212 will light up.
● Apply the turn signal for the side on which
you w ant
to leave the parking space.
● Select reverse gear. ●
Fo l
low the instructions given by the park
assist system.
● When the next indication appears, release
the steerin
g wheel ››› in Parking using the
p ark
a
ssist system on page 214: The sys-
tem will move the steering wheel!
Observe the surrounding area.
● Observe the surrounding area and acceler-
ate car
efully at a maximum of 7 km/h
(4 mph).
● The park assist system is only r
esponsible
for moving the steering wheel during the ma-
noeuvre. The driver applies the accelerator,
the clutch, the gears and the brake.
● When it is possible to leave the parking
spac
e, the Park Assist system will stop. Take
control of the steering and when traffic condi-
tions permit, leave the parking space.
Automatic stoppage of the manoeuvre
The park assist system stops the manoeuvre
in the event of one of the following:
● Driving faster than 7 km/h (4 mph).
● The driver moves the steering wheel.
● A sliding door is opened. To restart the ma-
noeuvre, c
lose the sliding door and press the
button again.
● There is a system malfunction (system tem-
por ari
ly
unavailable).
● The ASR system is switched off or the ASR
or ESC i
s working.
214
Driver assistance systems
WARNING
The steering wheel turns quickly automatical-
ly when l e
aving a parking space using the
park assist system. Placing your hand be-
tween the steering wheel spokes could lead
to injuries. Park Assist brake operation
The Park Assist system helps the driver by
brak
in
g automatically. Automatic braking
does not relieve the driver of responsibility
for controlling the accelerator, brake and
clutch ››› .
Br ak
in
g to avoid damage at excess speed
It is possible that the system operates the
brakes to reduce excess speed. The parking
manoeuvre can then continue. The brakes
will intervene during each parking process.
Braking to minimise damage
When approaching an obstacle, the vehicle
may brake automatically. In certain circum-
stances (e.g. storm, detection of ultrasounds,
vehicle status, load, inclination), the Park As-
sist system may stop the vehicle completely
before an object.
● Press the foot brake ››
›
!Following the intervention of the brakes, the
P
ark
As
sist will stop. WARNING
Despite the assistance provided by the park
as s
ist system, do not run any risks when
parking. The system is not a replacement for
driver awareness.
● Always be ready to brake.
● Automatic brake intervention will end after
1.5 seconds
approximately. Following auto-
matic intervention of the brakes, stop the ve-
hicle yourself. Rear assist* (Rear View Cam-
er
a)
Intr oduction The camera fitted to the rear lid helps drivers
durin
g p
ark
ing or reversing manoeuvres. The
camera image and certain orientation points
generated by the system are indicated on the
factory-fitted radio or navigation system
screen.
Two types of location point (modes) can be
selected:
● Mode 1: reverse parking perpendicular to
the ro
ad (e.g. in a car park). ●
Mode 2: rever
se parking parallel to the
curb.
The mode can be changed by pressing the
button on the radio or navigation system
screen. Only the mode to which the points
can be changed will be displayed. WARNING
Use of the camera to calculate the distance
from o b
stacles (people, vehicles, etc.) is inac-
curate and may cause accidents and severe
injuries.
● The camera lens expands and distorts the
field of
vision and displays the objects on the
screen in a different, vague manner.
● Some objects may not be displayed or may
not be v
ery clear (e.g. very thin posts or fen-
ces), due to the resolution of the monitor or if
the light is dim.
● The camera has blind spots in which obsta-
cle
s and people are not detected.
● Keep the camera lens clean and clear of
snow and ic
e. Do not cover it. WARNING
The intelligent technology in the rear assist
sys t
em cannot change the limits imposed by
the laws of physics and by the system itself.
Careless or uncontrolled use of the rear assist
system may result in severe injuries and acci-
dents. The system is not a replacement for
driver awareness. » 215
Technical data
Advice
Operation
Emergencies
Safety