brake MERCEDES-BENZ C-Class COUPE 2017 CL205 Repair Manual

The electric parking brake secures the vehicle
automatically if the HOLD function is activated
when the vehicle is stationary and:
Rasystem malfunction occurs.
Rthe power supply is not sufficient.
If am alfunction occurs, then the transmission
may be shifted into position Pautomatically.
RACE START
Important safety notes
iRACE START must not be used on normal
roads. RACE START must only be activated
and used on dedicated road circuits ,outside
of public road use.
iRACE START is only availablei n
Mercedes ‑AMG vehicles.
RACE START enables optimal acceleration from
as tandin gstart .For this, asuitably high-grip
road surface is required, along with the tires and
vehicle being in proper operating condition.
GWARNING
If you use RACE START, individual tires may
start to spin and the vehicle could skid.
Dependin gonthe selected ESP
®mode, there
is an increased risk of skidding and having an accident .Make sure that no persons, animals
or obstacles are within range of the vehicle.
iObserve the safety notes on driving safety
systems (Ypage 61).
Be sure to read the safety notes and informa-
tion on ESP
®(Ypage 67).
Conditions for activation
You can activate RACE START if:
Rthe doors are closed.
Rthe engine is runnin gand it has reached an
operating temperature of approximately
160 ‡(71 †). This is the case when the oil
temperature gauge in the multifunction dis-
play is shown in white.
Rthe drive program S,S+ orRace is selected.
(Ypage 139)
Rthe steerin gwheel is in the straight-ahead
position.
Rthe vehicle is stationary and the brake pedal is
depressed (left foot).
Rthe transmission is in position D.
Activating RACE START
iWhen manual mode (Ypage 146) is active,
the transmission automatically shifts up to
RACE START in the drive program. This func-
tion supports maximum acceleration with
RACE START. After going through an acceler-
ating process once from astationary position,
this function is automatically deactivated.
XDepress the brake pedal with your left foot
and keep it depressed.
XPull and hold both steerin gwheel paddle shift-
ers (Ypage 146).
The RACE START Confirm: Paddle UP
Cancel: Paddle DOWNmessage appears in
the multifunction display.
XRelease both steerin gwheel paddle shifters
(Ypage 146).
iIf the activation conditions are no longer ful-
filled, RACE START is canceled. The RACE
START Canceledmessage appears in the
multifunction display.
XTo cancel: pull the left steerin gwheel paddle
shifter (Ypage 146).
or
XTo confirm: pull the right steerin gwheel pad-
dle shifter (Ypage 146).
The RACESTARTAvailableDepressgaspedal.message appears in the multifunction
display.
iIf you do not depress the accelerator pedal
fully within two seconds, RACE START is can-
celed. The RACE
STARTNotPossibleSeeOperator'sManualmessage appears in the
multifunction display.
XFully depress the accelerator pedal.
The engine speed rises to approximately
3,500 rpm.
The RACE
STARTReleasebraketostartmessage appears in the multifunction display.
iIf you do not release the brake pedal within
five seconds, RACE START is canceled. The
Driving systems171
Driving and parking
Z

RACE START Canceledmessage appears in
the multifunction display.
XTake your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pullsa wayatmaximum acceler-
ation.
The RACE
STARTActivemessage appears in
the multifunction display.
RACE START is deactivated when the vehicle
reaches aspeed of approximately 30 mph (Can-
ada: 50 km/h).
RACE START is deactivated immediately if you
release the accelerator pedal during RACE
START or if any of the activation conditions are
no longer fulfilled. The RACE START Not Pos‐
sible See Operator's ManualorRACESTART Canceledmessage appears in the mul-
tifunction display.
iIf RACE START is used repeatedly within a
short period of time, it is only available again
after the vehicle has been driven acertain
distance.
AIRMATIC
General notes
AIRMATIC is an air suspension with variable
damping for improved driving comfort. All-round
level control ensures the best possible suspen-
sion and constant ground clearance, even with a
laden vehicle. When you drive fast, the vehicle is
lowered automaticallytoi mprove driving safety
and to reduce fuel consumption. There is also
the option to manuallya djust the vehicle level.
AIRMATIC consists of level setting, level control
and ADS (Adaptive Damping System).
The vehicle level can be set using the DYNAMIC
SELECT switch (
Ypage 139) or the level button
(Ypage 172). The setting always corresponds
to the last selected function.
Important safety notes
GWARNING
When the vehicle is being lowered, people
could become trapped if their limbs are
between the vehicle body and the wheels or
underneath the vehicle. There is arisk of
injury.
Make sure no one is underneath the vehicle or
in the immediate vicinity of the wheel arches
when the vehicle is being lowered.
iIf one of the doors is open, the vehicle is not
lowered.
Vehicle level
Setting the raised vehiclel evel
It is possible to choose between the "Normal"
and "Raised" vehicle levels below aspeed of
50 mph (80 km/h). Select the "Normal" setting
for normal road surfaces and "Raised" for driving
with snow chains or on particularlyp oor road
surfaces. Your selection remains stored even if
you remove the SmartKey from the ignition lock.
XStart the engine.
If indicator lamp ;is not lit:
XPress button :.
Indicator lamp ;lights up. The vehicle is
raised by 0.6 in (15 mm) compared to the
normal level.
The Vehicle
Risingmessage appears in the
multifunction display.
iThe message disappears after ten seconds,
irrespective of the level reached. If necessary,
the vehicle is raised further.
The "Raised level" setting is canceled if you:
Rdrive faster than 75 mph (120 km/h).
Rdrive for approximately three minutes at a
speed over 50 mph (80 km/h).
The "Raised level" remains active when you are
not driving within these speed ranges.
172Driving systems
Driving and parking

XPress button:.
Indicator lamp =lights up. You have selected
Sport mode.
The AMG Suspension System SPORT
mes-
sage appears in the multifunction display.
Sport +mode
The very firm setting of the suspension setting in
Sport +mode ensures the best possible contact
with the road. Select this mode only when driv-
ing on race circuits.
If indicator lamps ;and =are off:
XPress button :twice.
Indicator lamps ;and =light up. You have
selected Sport +mode.
The AMG
SuspensionSystemSPORT +mes-
sage appears in the multifunction display.
If indicator lamp =lights up:
XPress button :once.
Secondi ndicator lamp ;lights up. You have
selected Sport +mode.
The AMG
SuspensionSystemSPORT +mes-
sage appears in the multifunction display.
Comfort mode
In Comfort mode, the driving characteristics of
your vehicle are more comfortable. Select this
mode if you favor amore comfortable driving
style, but also when driving fast on straight
roads, e.g. highways.
XPress button :repeatedly until indicator
lamps ;and =go out.
You have selected Comfort mode.
The AMG
SuspensionSystemCOMFORTmes-
sage appears in the multifunction display.
4MATIC (permanent four-wheel drive)
4MATI Censures that all four wheels are perma-
nently driven. Together with ESP®,iti mproves
the traction of your vehicle whenever adrive
wheel spins due to insufficien tgrip.
If you fail to adapt your driving style, 4MATI Ccan
neither reduce the risk of accident nor override the laws of physics. 4MATI Ccannot take
account of road, weather and traffic conditions.
4MATI Ciso nly an aid. You are responsible for
the distanc etothe vehicle in front, for vehicle speed, for braking in good time and for staying in
your lane.
If
ad rive wheel spins due to insufficien tgrip:
ROnly depress the accelerator pedal as far as
necessary when pulling away.
RAccelerate less when driving.
!Never tow the vehicle with one axle raised.
This may damage the transfer case. Damage
of this sort is not covered by the Mercedes-
Benz Limited Warranty. All wheels must
remain either on the ground or be fully raised.
Observe the instruction sfor towing the vehi-
cle with all wheels in full contact with the
ground.
iIn wintry driving conditions, the maximum
effect of 4MATI Ccan only be achieved if you
use winter tires (M+S tires), with snow chains
if necessary.
PARKTRONIC
Important safety notes
PARKTRONIC is an electronic parking aid with
ultrasonic sensors.Itm onitors the area around
your vehicle using six sensors in the front
bumper and six sensors in the rear bumper.
PARKTRONIC indicates visually and audibly the
distanc ebetween your vehicle and an object.
PARKTRONIC is only an aid. It is not areplace-
ment for your attention to your immediate sur-
roundings. You are alwaysr esponsible for safe
maneuvering, parking and exitin gaparking
space. When maneuvering, parking or pulling
out of aparking space, make sure that there are
no persons, animals or object sinthe area in
which you are maneuvering.
!When parking, pay particular attention to
object sabove or below the sensors,s uch as
flower pots or trailer drawbars. PARKTRONIC
does not detect such object swhen they are in
the immediate vicinityoft he vehicle. You
could damage the vehicle or the objects.
The sensors may not detect snow and other
object sthat absorb ultrasonic waves.
Ultrasonic sources such as an automatic car
wash, the compressed-air brakes on atruck
or ap neumatic drill could cause PARKTRONIC
to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
174Driving systems
Driving and parking

Problems with PARKTRONIC
ProblemPossible causes/consequences andMSolutions
Only the red segments in
the PARKTRONIC warn-
ing displaysare lit. You
also hear awarning tone
for approximately two
seconds.
PARKTRONIC is then
deactivated and the indi-
cator lamp on the
PARKTRONIC button
lights up.PARKTRONIC has malfunctioned and has switched off.
XIf problems persist, have PARKTRONIC checked at aqualified spe-
cialist workshop.
Only the red segments in
the PARKTRONIC warn-
ing displaysa re lit.
PARKTRONIC is then
deactivated.The PARKTRONIC sensors are dirty or there is interference.
XClean the PARKTRONIC sensors (Ypage 296).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-
sound waves.
XSee if PARKTRONIC functions in adifferent location.
Active Parking Assist
General notes
Active Parking Assist is an electronic parking aid
with ultrasound. It measures the road on both
sides of the vehicle. Aparking symbol indicates
as uitable parking space. Active steering inter-
vention and brake application can assist you
during parking and when exiting aparking
space. You may also use PARKTRONIC
(
Ypage 174).
Important safety notes
Active Parking Assist is merely an aid. It is not a
replacement for your attention to your immedi-
ate surroundings. You are always responsible
for safe maneuvering, parking and exiting a
parking space. Make sure that no persons, ani-
mals or object sare in the maneuvering range.
When PARKTRONIC is switched off, Active Park-
ing Assist is also unavailable.
GWARNING
While parking or pulling out of aparking
space, the vehicle swings out and can drive
onto areas of the oncomingl ane. This could
result inacollision with another road user.
There is arisk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active Park- ing Assist parking procedure.
!If unavoidable, you should drive over obsta-
cles such as curbs slowly and not at asharp
angle. Otherwise, you may damage the
wheels or tires.
Active Parking Assist may also display spaces
not suitable for parking, e.g.:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
Parking tips:
ROn narrow roads, drive as close to the parking
space as possible.
RParking spaces that are littered or overgrown
might be identified or measured incorrectly.
RParking spaces that are partially occupied by
trailer drawbars might not be identified as
such or be measured incorrectly.
RSnowfall or heavy rain may lead to aparking
space being measured inaccurately.
Driving systems177
Driving and parking
Z

Rthatareparallel to the direction of travel and
at leas t39.5 in (1.0 m)longer than your vehi-
cle
Rthat are at right angles to the direction of
travel and at least 39.5i n(1.0m )wider than
your vehicle
iNotet hat Activ eParking Assist cannot
measure the size of aparking space if it is at
right angles to the direction of travel. You will
need to judge whether your vehicle will fit into the parking space.
When drivingats peeds below 19 mph
(3 0k m/ h),y ou will see the parking symbol as a
status indicator in the instrumentc luster. When
ap arking space has been detected, an arrow
towards the right or the left also appears. By
default,A ctiveP arking Assist only displays park-
ing spaces on the front-passenge rside. Parking
spaces on the driver's side are displayed as
soon as the turn signal on the driver's side is
activated. When parking on the driver's side,
this must remain switched on until you acknowl-
edge the use of Activ eParking Assist by press-
ing the abutton on the multifunction steer-
ing wheel. The system automatically determines
whether the parking space is parallel or at right
angles to the direction of travel.
Ap arking space is displayed while you are driv-
ing past it, and until you are approximately 50 ft (1 5m)a way fromi t.
Parking
GWARNING
If you leave the vehicle when it is only being
braked by Activ eParking Assist it could roll
away if:
Rthere is amalfunction in the system or in
the voltage supply.
Rthe electrical system in the engin ecom-
partment, the battery or the fuses have
been tampered with.
Rthe battery is disconnected.
Rthe accelerator pedal has been depressed,
e.g. by avehicle occupant.
There is arisk of an accident.
Before leavingt he vehicle, always secur eit
against rollinga way.
iWhen PARKTRONIC detect sobstacles,
Activ eParking Assist brakes automatically
duringt he parking process. You are respon-
sible for braking in good time.
XStop the vehicle when the parking space sym- bol shows the desiredp arking space in the
instrumentc luster.
XShiftthe transmission to position R.
The Start
ParkAssist?Yes:OKNo:%
message appears in the multifunction display.
XTo cancel th eprocedure: press the %
button on the multifunction steeringw heel or
pull away.
or
XTo park using Active Parking Assist: press
the a button on the multifunction steering
wheel.
The Park Assist Active Accelerate
and BrakeObserve Surroundingsmes-
sage appears in the multifunction display.
XLet go of the multifunction steeringw heel.
XBackupt he vehicle, being ready to brakeata ll
times. When backing up, drive at aspeed
below approximately 6mph (10 km/h). Oth-
erwise Activ eParking Assist will be canceled.
Activ eParking Assist brakes the vehicle to a
standstill when the vehicle approaches the
rear border of the parking space.
Maneuveringm ay be requiredint ightparking
spaces.
The Park
AssistActiveSelect DObserveSurroundingsmessage appears in the multi-
function display.
XShif tthe transmission to position Dwhile the
vehicle is stationary.
Activ eParking Assist immediately steers in
the other direction.
The Park Assist Active Accelerate
and BrakeObserve Surroundingsmes-
sage appears in the multifunction display.
iYou will achiev ethe best resultsbyw aiting
for the steeringp rocedure to complete before
pulling away.
XDrive forwards and be ready to brakeata ll
times.
Activ eParking Assist brakes the vehicle to a
standstill when the vehicle approaches the
front border of the parking space.
Maneuveringm ay be requiredint ightparking
spaces.
Driving systems179
Driving and parking
Z

TheParkAssistActiveSelect RObserveSurroundingsmessage appears in the multi-
function display.
As soon as the parking procedure is complete,
the Park Assist Switched Off
message
appears and awarning ton esounds. The vehicle
is now parked.
The vehicle is kept stationary without the driver having to depress the brake pedal. The braking
effect is canceled when you depress the accel-
erator pedal.
Active Parking Assist no longer supports you
with steerin ginterventions and brake applica-
tions. When Active Parking Assist is finished,
you must steer and brake again yourself.
PARKTRONIC is still available.
Parking tips:
RThe way your vehicle is positioned in the park-
ing space after parking is dependent on vari-
ous factors. These include the position and
shape of the vehicles parked in front and
behind it and the conditions of the location. It
may be the case that Active Parking Assist
guides you too far into aparking space, or not
far enough into it. In some cases, it may also
lead you across or ontot he curb. If necessary,
you should cancel the parking procedure with
Active Parking Assist.
RYou can also select preselect transmission
position D.The vehicle redirectsa nd does not
drive as far into the parking space. Should the
transmission change take place too early, the
parking procedure will be canceled. Asensi-
ble parking position can no longer be ach-
ieved from this position.
Exiting aparking space
In order that Active Parking Assist can support
you when you exit the parking space:
Rthe border of the parking space must be high
enough at the front and the rear. Acurb is too
small, for example.
Rthe border of the parking space must not be
too wide, as the position of the vehicle must
not exceed an angle of 45° to the starting
position as it is maneuvering into the parking
space.
Ram aneuvering distance of at least 3.3 ft
(1.0 m) must be available.
Active Parking Assist can only assist you with
exitin gaparking space if you have parked the vehicle parallel to the direction of travel using
Active Parking Assist.
iIf PARKTRONIC detect
sobstacles, Active
Parking Assist brakes automatically whilst the
vehicle exits the parking space. You are
responsible for braking in good time.
XStart the engine.
XRelease the electric parking brake.
XSwitch on the turn signal in the direction you
are pulling away.
XShift the transmission to position Dor R.
The Start
ParkAssist?Yes:OKNo:%
message appears in the multifunction display.
XTo cancel the procedure: press the%
button on the multifunction steerin gwheel or
pull away.
or
XTo exit aparking space using Active Park-
ing Assist: press theabutton on the mul-
tifunction steerin gwheel.
The Park Assist Active Accelerate
and BrakeObserve Surroundingsmes-
sage appears in the multifunction display.
XLet go of the multifunction steerin gwheel.
XPull away,b eing ready to brake at all times. Do
not exceed amaximum speed of approx-
imately 6mph (10 km/h) when exitin gapark-
ing space. Otherwise Active Parking Assist
will be canceled.
XDependin gonthe message or as required,
shift the transmission to position Dor R.
Active Parking Assist immediately steers in
the other direction .The Park Assist
Active Accelerate and BrakeObserveSurroundingsmessage appears in the mul-
tifunction display.
iYou will achieve the best results by waiting
for the steerin gprocedure to complete before
pulling away.
If you back up after activation ,the steering
wheel is moved to the straight-ahead posi-
tion.
XDrive forwards and back up as prompted by
the PARKTRONIC warning displays, several
times if necessary.
Once you have exited the parking space com-
pletely, the steerin gwheel is moved to the
straight-ahead position. You hear aton ea nd the
Park
AssistSwitchedOffmessage appears
in the multifunction display.Y ou will then have
to steer and merge into traffic on your own.
180Driving systems
Driving and parking

PARKTRONIC is still available. You can take over
the steering, before the vehicle has exited the
parking space completely. This is useful, for
example when you recognize that it is already
possible to pull out of the parking space.
Canceling Active Parking Assist
XStop the movementofthe multifunction
steerin gwheel or steer yourself.
Active Parking Assist will be canceled at once.
The Park Assist Canceled
message
appears in the multifunction display.
or
XPress the PARKTRONIC button (Ypage 176).
PARKTRONIC is switched off and Active Park-
ing Assist is immediately canceled. The Park
Assist Canceledmessage appears in the
multifunction display.
Active Parking Assist is canceled automatically
if:
Rthe electric parking brake is engaged
Rtransmission position Pis selected
Rparking using Active Parking Assist is no lon-
ger possible
Ryou are driving faster than 6mph (1 0km/ h)
Raw heel spins, ESP®intervene sorfails.The
÷ warning lamp lightsupint heinstrument
cluster
Aw arning tone sounds. The parking symbo ldis-
appearsa nd themultifunction display showst he
ParkA ssist Canceled
message.
When Activ eParking Assist is canceled, you
must steer and brak eagain yourself.
If as ystem malfunctio noccurs, th evehicle is
braked to astandstill. To driv eon,depress the
accelerato ragain.
Rea rview camera
General notes
Rear view camera :is an optical parking and
maneuvering aid. It showst hearea behindy our
vehicle with guide line sinthemultimedia sys-
tem.
The area behindt hevehicle is displayedasa
mirror image ,asintherear view mirror.
iThe text shownint hemultimedia system
depends on th elanguage setting. The follow-
ing are examples of rear view camera displays
in th emultimedia system.
Important safety notes
The rear view camera is only an aid. It is no ta
replacement for your attention to your immedi-
ate surroundings. You are always responsible
for safe maneuvering and parking .When maneu-
vering or parking ,makes ure that there are no
persons, animals or object sinthearea in which
you are maneuvering.
Under th efollowingc ircumstances, th erear
view camera will no tfunction,orw ill function in
al imited manner:
Rif th etrunk lid is open
Rin heavyr ain,sno worf og
Rat night or in ver ydark places
Rif th ecamera is exposed to ver ybright light
Rif th earea is lit by fluorescent bulbs or LED
lighting (th edisplay may flicker)
Rif there is asudden chang eintemperature,
e.g .when driving int oaheated garag einwin-
ter
Driving systems181
Driving and parking
Z

Switching on Blind Spot Assist
XMake sure that Blind Spot Assist
(Ypage 213) is activated in the on-board
computer.
XTurn the SmartKey to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors light
up red until the engine is started.
Display in the assistance graphic
When Blind Spot Assist is activated, gray radar
waves propagating backwards appear next to
the vehicle in the assistance display in the mul-
tifunction display.A boveaspeed of 20 mph
(30 km/h), the color of the radar waves in the
assistance display changes to green :.Blind
Spot Assist is then ready for use.
Lane Keeping Assist
General notes
Lane Keeping Assist monitor sthe area in front of
your vehicle by means of multifunction cam-
era :which is attached behind the top of the
windshield. Active Lane Keeping Assist detects
lane markings on the road and can warn you
before you leave your lane unintentionally. This function is available in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
Aw
arning may be given if afront wheel passes
over alane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 seconds.
Important safety notes
GWARNING
Lane Keeping Assist may not always clearly
recognizel ane markings.
In this case, Lane Keeping Assist may:
Rgive an unnecessary warning
Rnot give awarning
There is arisk of an accident.
Always pay particular attention to the traffic
situation and stay in lane, in particular if
warned by Lane Keeping Assist.
GWARNING
The Lane Keeping Assist warning does not
return the vehicle to the original lane. There is
ar isk of an accident.
You should always steer, brake or accelerate
yourself, in particular if warned by Lane Keep-
ing Assist.
If you fail to adapt your driving style, Lane Keep-
ing Assist can neither reduce the risk of an acci-
dent nor override the laws of physics. Lane
Keeping Assist cannot take into account the
road, traffic and weather conditions. Lane Keep- ing Assist is merely an aid. You are responsible
for the distance to the vehicle in front,f or vehi-
cle speed, for braking in good time and for stay-
ing in your lane.
The Lane Keeping Assist does not keep the vehi-
cle in the lane.
The system may be impaired or may not function
if:
Rthere is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray
Rthere is glare, e.g. from oncomingt raffic, the
sun or reflection s(e.g. when the road surface
is wet)
Rthe windshield is dirty, fogged up, damaged or
covered, for instancebyas ticker, in the vicin-
ity of the camera
Driving systems193
Driving and parking
Z

The detection of obstacles can be impaired in
the case of:
Rthere is dirt on the sensors or anything else
coveringthe sensors
Rpoor visibility, e.g. due to rain, snow or spray
Vehicles in the monitoring range are then not
indicated.
Active Blind Spot Assist may not detect narrow
vehicles, such as motorcycles or bicycles, or
may only detect them too late.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may be
indicated, especially if the vehicles are not driv- ing in the middle of their lane. This may be the
case if there are vehicles at the inner edge of
your lane.
Due to the nature of the system:
Rwarnings may be issued in error when driving
close to crash barriers or similar solid lane
borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, e.g.
trucks, for aprolonged time.
Warning display
:Warning display
Active Blind Spot Assist is not operational at
speeds below approximately 20 mph (30 km/h).
Vehicles in the monitoring range are then not
indicated.
If av ehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(3 0k m/ h),w arnin glamp :on the correspond-
ing side lights up red. This warnin gisalways
emitted when avehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake avehicle, the warnin gonly
occurs if the differenc einspeed is less than
7m ph (12 km/h). If you select the reverse gear, Active Blind Spot
Assis
tisnot operational.
The brightness of the warnin glamps is auto-
matically adapted to the brightness of the sur-
roundings.
When Active Blind Spot Assis tisactivated, gray
radar waves propagatin gbackwards appear
nex ttot he vehicle in the assistance display in
the multifunction display. Abov easpeed of
20 mph (30 km/h), the color of the radar waves
in the assistance display changes to green ;.
Active Blind Spot Assis tisthen ready for use.
Visua land acoustic collision warning
If you switc honthe turn signals to change lanes
and avehicle is detected in the side monitoring
range, you receiv eavisual and acoustic collision
warning. You will then hear adouble warning
ton eand red warnin glamp :flashes. If the turn
signal remainso n, detected vehicles are indica-
ted by the flashingofr ed warninglamp :.
There are no further warnin gtones.
Course-correcting brake application
If Active Blind Spot Assis tdetects arisk of alat-
eral collision in the monitoring range, acourse-
correcting brake application is carried out. This
is meant to assist you in avoiding acollision.
GWARNING
Ac ourse-correctin gbrake application cannot
always preventac ollision.There is arisk of an
accident.
Always steer ,brake or accelerate yourself,
especially if Active Blind Spot Assis twarns
you or makes acourse-correctin gbrake appli-
cation. Always maintain asafe distance at the
sides.
196Driving systems
Driving and parking

Ifac ourse-correcting brake application occurs,
red warning lamp :flashe sinthe exterior mir-
ror and adualw arning tone sounds. In addition,
display ;underlining the danger of aside col-
lision appears in the multifunction display.
In very rare cases, the system may make an
inappropriate brake application. Acourse-cor-
recting brake application may be interrupted at
any time if you steer slightly in the opposite
direction or accelerate.
The course-correcting brake application is avail-
abl eint he speed range between 20 mph
(30 km/h) and 120 mph (200 km/h).
Either no braking application, or acourse-cor-
recting brake application adapted to the driving
situation occurs if:
Rthere are vehiclesoro bstacles,e.g. crash
barriers, located on both sides of you rvehicle.
Rav ehicle approaches you too closely at the
side.
Ryou have adopted asporty driving style with
high cornering speeds.
Ryou clearl ybrake or accelerate.
Rad riving safety system intervenes, e.g. ESP®
or PRE-SAFE®Brake.
RESP®is switched off.
Raloss of tire pressure or adefective tire is
detected.
Switching on Activ eBlind Spot Assist
XMake sure that Active Blind Spot Assist is
activated in the on-board computer
(
Ypage 213).
XTurn the SmartKey to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors light
up red for approximately 1.5 seconds .Gray
rada rwave spropagating backwards appear
next to the vehicle in the assistance display in
the multifunction display.
Active Lane Keeping Assist
General notes
Active Lane Keeping Assist monitors the area in
front of you rvehicle by means of multifunction
camera :at the top of the windshield. Various
different area stothe front, rear and side of your
vehicle are also monitored with the aid of the
rada rsensor system. Active Lane Keeping
Assist detects lane markings on the road and
can warn you before you leave you rlane unin-
tentionally .Ifyou do not react to the warning, a
lane-correcting application of the brakes can
bring the vehicle back into the originall ane.
Important safety notes
If you fail to adapt yourdriving style, Active Lane
Keeping Assist can neither reduce the risk of
accident nor override the law sofphysics. Active
Lane Keeping Assist cannot take account of
road and weather conditions. It may not recog-
nize traffic situations. Active Lane Keeping
Assist is only an aid .You are responsible for the
distance to the vehicle in front, for vehicle
speed,f or braking in good time and for staying in
you rlane.
Active Lane Keeping Assist cannot continuously
keep you rvehicle in its lane.
GWARNING
Active Lane Keeping Assist cannot always
clearl ydetect lane markings.
In such cases, Active Lane Keeping Assist
can:
Rgive an unnecessary warning and then
make acourse-correcting brake application
to the vehicle
Rnot give awarning or intervene
There is arisk of an accident.
Driving systems197
Driving and parking
Z