2012 MERCEDES-BENZ CLS COUPE park assist

Problems with Night View Assist Plus
Problem Possible causes/consequences and
M Solutions
The picture quality of
Night View Assist Plus
has deteriorated. The windscreen wipers are smearing the windscreen.
X
Replace the wiper blades (Y page 121). The windscreen is smeared after the vehicle has been cleaned in
ac
ar wash.
X Cleant he windscreen (Y page 304). There is windscreen chip damage in the camera's field of vision.
X
Replace the windscreen. The windscreen is misted up on the inside.
X
Demist the windscreen (Y page 130). The windscreen is iced up.
X
De-ice the windscreen (Y page 130). There is dirt on the inside of the windscreen.
X
Cleant he inside of the windscreen (Y page 304).Lane Tracking package
General notes The Lane Tracking package consistsofB
lind
Spot Assist (Y page 197) and Lane Keeping
Assist (Y page 199).
Blind Spot Assist Important safety notes
G
WARNING
Blind Spot Assist is only an aid designed to
assist driving. It may fail to detect some vehi-
cles and is no substitute for attentive driving.
Blind Spot Assist cannot detect road and traf-
fic conditions. It may fail to detect narrow
vehicles, such as motorcycles or bicycles, or
only detect them too late.
Monitoring may be affected by dirty sensors,
strongs pray or poor visibility caused by snow,
rain or mist, for example. In this case, vehicles
are detected late or not at all. Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others.
General notes
Blind Spot Assist uses aradar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from speeds of
30 km/h. Awarning displayint he exterior
mirrors draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
change lane, you will also receive an optical
and audible collision warning. For monitoring,
Active Blind Spot Assist uses sensors in the
rear bumper.
For Blind Spot Assist to assist you when driv-
ing, the radar sensor system must be activa-
ted (Y page 225) and operational.
The radar sensor system is automatically
deactivated near radio telescope facilities
(Y page 368). Driving systems
197Driving and parking Z

Monitoring range of the sensors
G
WARNING
Blind Spot Assist monitors certain area sinthe
immediate vicinity of yourv ehicle. Vehicles
that approach and drive past at high speeds
are not detected. There is no display and no
warning.
If the lanes are very wide, it may not be pos-
sible to monitor the complet ewidth of the
neighbourin glane. For this reason, vehicles in
the nextl ane may no tbedetected, especially
if they are driving in astaggered formation in
differen tlanes .This may be the case if vehi-
cles are driving at the edge of their lane that
is furthest away from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. Blind Spot Assist monitors the area up to
3.0 mbehind your vehicle and directly nextto
your vehicle, as shown in th ediagram.
If th elanes are narrow ,vehicles drivin ginthe
lan ebeyond th elan en exttoy our vehicl emay
be indicated, especially if th evehicles are not
drivin ginthemiddle of their lane. This may
be th ecaseift here are vehicles at th eedge
of their lan enearest your vehicle. Due to th
enature of th esystem:
R warnings may be issued in error when driv-
ingc lose to crash barrier sorsimilar solid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for aprolonged time.
The two radar sensors for Blin dSpot Assist
are integrated int othe sides of the rear
bumper .Make sure that th ebumpe risfree of
dirt, ice or slush in the vicinity of the sensors.
The sensors must not be covered, for exam-
ple by cycle racks or overhanging loads. Fol-
lowing asevere impact or in the event of dam-
age to the bumpers, have the function of the
sensors checked at aqualified specialist
workshop. Blind Spot Assist may otherwise
not work properly.
Indicator and warning display G
WARNING
Blind Spot Assist is not active at speeds below
30 km/h. The indicator lamps in the exterior
mirrors are yellow. Vehicles in the monitoring
range are then not indicated.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourselfa nd others. :
Yellow indicator lamp/red warning lamp
If Blind Spo tAssist is switched on, indicator
lamp :in the exterior mirrors lights up yel-
low up to aspeed of 30 km/h. At speeds
above 30 km/h, the indicator lamp goes out
and Blind Spot Assist is operational. 198
Driving systemsDriving and parking

If
av ehicle is detected within the monitoring
range of Blind Spot Assist at speedsa bove
30 km/h, warning lamp :on the corre-
sponding side lights up red. This warning
alwayso ccurs when avehicle enters the blind
spot monitoring range from behind or from
the side. When you overtake avehicle ,the
warning only occurs if the difference in speed
is less than 12 km/h.
The yellow indicator lamp goes out if reverse
gear is engaged. Blind Spot Assist is then
deactivated.
The brightness of the indicator/warning
lampsisa djusted automaticall yaccording to
the ambient light.
Collision warning
If av ehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal ,adouble warning
tone sounds. Red warning lamp :flashes. If
the turn signal remains on, detected vehicles
are indicated by the flashing of red warning
lamp :.There are no further warning tones.
Switching on Blind Spot Assist
X Make sure that the radar sensor system
(Y page 225) and Blind Spot Assist
(Y page 220) are activated in the on-board
computer.
X Turn the key to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Lane Keeping Assist Important safety notes
G
WARNING
Lane Keeping Assist does not keep your vehi-
cle in its lane. It is only an aid and may detect
the lane markings on the road incorrectly or
not at all. The system may be impaired or may not func-
tion if:
R
there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray.
R there is glare, e.g. from oncomingt raffic,
the sun, or reflection from other vehicles.
R the windscreen is dirty, misted up or cov-
ered, for instancebyas ticker, in the vicinity
of the camera
R several or no lane markings for asingle lane
are present.
R the lane markings are worn away,d ark or
covered up, e.g. by dirt or snow.
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected.
R the lane markings on the road are unclear,
e.g. near roadworks.
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge.
R the road is narrow and winding.
Lane Keeping Assist cannot detect road and
traffic conditions. It is not asubstitute for
attentive driving. You are responsible for the
vehicle's speed, braking in good time, and
steering correctly. Always adapt your driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditionsa nd your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourself and oth-
ers. Driving systems
199Driving and parking Z

General notes
Lane Keeping Assist monitors the area in
front of yourv
ehicle by means of acam-
era :at the top of the windscreen. Lane
Keeping Assist detects lane markings on the
road and warns you before you leave your
lane unintentionally.
If you have selected km as the display unit in
the Display unit Speed-/odome‐ ter (Y
page 221) function in the on-board
computer, Lane Keeping Assist assists you at
speed sabove 60 km/h. If miles is selected
as the display unit, the assistance range
starts at 40 mph.
Aw arning may be given if afront wheel
passes over alane marking. It willw arn you
by means of intermittent vibration in the
steering wheelf or up to 1.5 seconds.
Activating Lane Keeping Assist X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or
Adaptive (Y
page 220).
Symbol :appears in the multifunction
display.
If you drive at speed sabove 60 km/h and
lane markings are detected, symbol :is shown in green. Lane Keeping Assist is
readyf or use.
Standard
If Standard is selected, no warning vibration
occurs if:
R you have switched on the turn signals. In
this case, the warnings are suppressed for
ac ertain perio doftime.
R ad riving safety system intervenes, such as
ABS, BAS or ESP ®
.
Adaptive
If Adaptive is selected, no warning vibration
occurs if:
R you have switched on the turn signals. In
this case, the warnings are suppressed for
ac ertain perio doftime.
R ad riving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively ,e.g. swerve to avoidan
obstacle or change lane quickly.
R you cut the corner on asharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane
marking, the system recognises certain con-
ditions and warns you accordingly.
The warning vibration occurs earlier if:
R you approach the outer lane marking on a
bend.
R the road has very widel anes, e.g.amotor-
way.
R the system recognises solidl ane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on abend. 200
Driving systemsDriving and parking

Active Driving Assistance package
Genera lnotes The Active Drivin
gAssistance packag econ-
sists of DISTRONI CPLUS(Ypage 170), Active
Blind Spot Assist (Y page 201)and Active
Lane Keeping Assist (Y page 204).
Active Blind Spot Assist Important safet
ynotes G
WARNING
Active Blind Spot Assist is only an aid and may
detec tvehicles/obstacles incorrectly or not
at all.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to snow,
rain, fog or spray.
R the rear and/or fron tsensor sare dirty.
Active Blind Spot Assist may not detect nar-
row vehicles, such as motorcycles or bicycles,
or only detect them too late. It cannot detect
vehicles which are overtaken at asmall dis-
tanc eand then enter the blind spot area.
Active Blind Spot Assist cannot detect road
and traffic conditions .Itisnotas ubstitute for
attentive driving. You are responsible for the
vehicle's speed, braking in good time, and
steering correctly. Always adapty our driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourself and oth-
ers.
General notes
Active Blind Spot Assist uses aradar sensor
system to monitor the area to the sides of
your vehicle which are behind the driver. A
warning display in the exterior mirrors draws
your attention to vehicles detected in the
monitored area. If you then switch on the cor-
responding turn signal to change lane, you
will also receive an optical and audible warn- ing. If
arisk of lateral collision is detected,
corrective braking may help you avoid acol-
lision. To support the course-correcting brake
application, Active Blind Spot Assist uses the
forward-facin gradar sensor system. The free
space in the direction of travel is then evalu-
ated.
Active Blind Spot Assist supports you from a
speed of approximately 30 km/h.
The radar sensor system is switched off auto-
matically in the vicinit yofradio telescope
facilities (Y page 368).
For Active Blind Spot Assist to assist you
when driving, the radar sensor system must
be activated (Y page 225) and operational.
Monitoring range G
WARNING
Active Blind Spot Assist monitors certain
areas in the immediate vicinit yofyour vehicle.
Vehicles that approach and drive past at high
speeds are not detected. No visual nor audi-
ble warnings are emitted and the system does
not brake the vehicle to correc tyour course.
If the lanes are very wide, it may not be pos-
sible to monitor the complete width of the
neighbouring lane. For this reason, vehicles in
the next lane may not be detected, especially
if they are driving in astaggered formation.
This may be the case if vehicles are driving at
the edge of their lane that is furthest away
from your vehicle.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. Driving systems
201Driving and parking Z

Activ
eBlind Spo tAssist monitors the area up
to 3.0 mbehind your vehicle and directly next
to your vehicle, as shown in the diagram. For
this purpose, Active Blind Spot Assist uses
radar sensors in the rear bumper.
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
driving 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:
R warnings may be issued in error when driv-
ing close to crash barriers or similars olid
lane borders.
R warnings may be interrupted when driving
alongside long vehicles, for example lor-
ries, for aprolonged time.
The Active Blind Spot Assist radar sensors are
integrated into the front and rear bumpers
and behind acover in the radiator grille. Make
sure that the bumpers and the cover in the
radiator grille are free of dirt, ice or slush. The
rear sensors must not be covered, e.g. by
bicycle racks or overhanging loads. Following
as evere impact or in the event of damage to
the bumpers, have the function of the radar
sensors checked at aqualified specialist
workshop. Active Blind Spot Assist may oth-
erwise no longer work properly. Indicator and warning display G
WARNING
Active Blind Spot Assist is not active at speeds
below 30 km/h. The indicator lamps in the
exterior mirrors are yellow .Vehicles in the
monitoring range are then not indicated.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time and cause an acci-
dent and injure yourself and others. :
Yellow indicator lamp/red warning lamp
If Active Blind Spot Assist is switched on,
indicator lamps :in the exterior mirror slight
up yellow up to aspeed of 30 km/h. At
speeds above 30 km/h, the indicator lamp
goes out and Active Blind Spot Assist is
operational.
If av ehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
30 km/h, warning lamp :on the corre-
spondin gside lights up red. This warning
alway soccurs when avehicle enters the blind
spot monitoring range from behind or from
the side. When you overtake avehicle, the
warning only occurs if the difference in speed
is less than 12 km/h.
The yellow indicator lamp goes out if reverse
gear is engaged. Active Blind Spot Assist is
then no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light. 202
Driving systemsDriving and parking

Visual and acousti
ccollision warning
If yo uswitch on the turn signals to change
lanes and avehicl eisd etected in the side
monitoring range, yo ureceive avisua land
acoustic collision warning .You then hear a
double warning tonea nd red warning
lamp :flashes. If the turn signal remains on,
detected vehicles are indicated by the flash-
ing of red warning lamp :.There are no fur-
ther warning tones.
Course-correcting brake application G
WARNING
Active Blind Spot Assist is only an aid
designed to assist driving. It is not asubstitute
for attentive driving. Automatic braking by the
system may not always be sufficient to avoid
ac ollision. In such cases, you need to steer,
brake or accelerate yourself.
In very rare cases, the system may detect a
risk of collision where there is none and brake
in error near crash barriers or similar road
boundaries. Active Blind Spot Assist cannot
detect all traffic situations and road users.
Ensure at all times that there is sufficient lat-
eral distance between you and other road
users or obstacles. You can, for example,
countersteer gently or depress the accelera-
tor pedal at any time to cancel inappropriate
braking action.
You are responsible for the vehicle's speed,
correct steering and for braking in good time.
Always adapt your driving style to suit the
prevailing road and weather conditions.
Always pay attention to traffic conditionsa nd
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. If Active Blind Spot Assist detectsar
isk of a
lateral collision in the monitoringr ange, a
course-correcting brake application is carried
out. This is designed to help you avoid acol-
lision.
If ac ourse-correcting brake application
occurs, red warning lamp :flashes in the
exterior mirror and adual warning tone
sounds. In addition, the message shown in
the illustration appears in the multifunction
display.
The course-correctingb rake application is
available in the speed range between
30 km/h and 200 km/h.
Either no braking application, or acourse-
correcting brake application adapted to the
driving situation occurs if
R there are vehicles or obstacles, e.g. crash
barriers, on both sides of your vehicle.
R av ehicle approaches too closely on the
side.
R you have adopted asporty driving style with
high cornering speeds.
R you brake or accelerate decisively.
R ad riving safety system intervenes, such as
ESP ®
or PRE-SAFE ®
Brake. Driving systems
203Driving and parking Z

R
ESP ®
is deactivated.
R al os soft yrep ressure or adefective tyr eis
detected.
Activatin gActiveB lind Spo tAssist
X Make sure that the radar sensor system
(Y page 225) and Active Blind Spot Assist
(Y page 220) are activated in the on-board
computer.
X Turn the key to position 2in the ignition
lock.
Warning lamps :in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Active Lane Keeping Assist Important safety notes
G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid and
may detect the lane markings on the road
incorrectly or not at all.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to inade-
quate illumination of the road surface,
snow, rain, fog or spray.
R there is glare, e.g. from oncoming traffic,
the sun, or reflection from other vehicles.
R the windscreen is dirty, fogged up or cov-
ered, for instance by asticker, in the vicinity
of the camera.
R several or no lane markings for asingle lane
are present.
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow.
R the distanc etothe vehicle in fron tistoo
small and as aresult the lane markings can-
not be recognised.
R the lane markings on the road are unclear,
e.g. near roadworks. R
the lane markings change quickly, e.g.
branch off, cross, or merge.
R the road is narrow and winding.
Active Lane Keeping Assist cannot detect
road and traffic conditions. It is not asubsti-
tute for attentive driving. You are responsible
for the vehicle's speed, braking in good time,
and steerin gcorrectly. Always adapt your
driving style to suit the prevailing road and
weather conditions. Always pay attention to
traffic conditions and your surroundings. Oth-
erwise, you may fail to recognise dangers in
time, cause an accident and injure yourself
and others.
General notes Active Lane Keeping Assist monitors the area
in fron
tofyour vehicle by means of acam-
era :at the top of the windscreen .Active
Lane Keeping Assist detect slane markings on
th er oad and warn syou before you leave your
lane unintentionally. If you do no treact to the
warning, alane-correctinga pplication of the
brakes can bring the vehicle back intot he
original lane.
If you have selected km as the display unit in
the Display unit Speed-/odome‐ ter (Y
page 221)f unction in the on-board
computer, Active Lane Keeping Assist assists
you at speeds above 60 km/h. If miles is
selected as the display unit, the assistance
range start sat40mph. 204
Driving systemsDriving and parking