2016 MERCEDES-BENZ C CLASS lane assist

The detection of obstacles can be impaired in
the case of: R
there is dirt on the sensors or anything else
covering the sensors R
poor 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: R
warnings may be issued in error when driving
close to crash barriers or similar solid lane
borders. R
warnings may be interrupted when driving
alongside particularly long vehicles, e.g.
trucks, for a prolonged time.
Warning display
C
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 a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/ h) , warning lamp C on the correspond-
ing side lights up red. This warning is always
emitted when a vehicle enters the blind spot
monitoring range from behind or from the side.
When you overtake a vehicle, the warning only
occurs if the difference in speed is less than
7 mph (12 km/h). If you select the reverse gear, Active Blind Spot
Assist is not operational.
The brightness of the warning lamps is auto-
matically adapted to the brightness of the sur-
roundings.
When Active Blind Spot Assist is activated, gray
radar waves propagating backwards appear
next to the vehicle in the assistance display in
the multifunction display. Above a speed of
20 mph (30 km/h), the color of the radar waves
in the assistance display changes to green D .
Active Blind Spot Assist is then ready for use.
Visual and acoustic collision warning If you switch on the turn signals to change lanes
and a vehicle is detected in the side monitoring
range, you receive a visual and acoustic collision
warning. You will then hear a double warning
tone and red warning lamp C flashes. If the turn
signal remains on, detected vehicles are indica-
ted by the flashing of red warning lamp C .
There are no further warning tones.
Course-correcting brake application
If Active Blind Spot Assist detects a risk of a lat-
eral collision in the monitoring range, a course-
correcting brake application is carried out. This
is meant to assist you in avoiding a collision.
G WARNING
A course-correcting brake application cannot
always prevent a collision. There is a risk of an
accident.
Always steer, brake or accelerate yourself,
especially if Active Blind Spot Assist warns
you or makes a course-correcting brake appli-
cation. Always maintain a safe distance at the
sides.Driving systems 221
Driving and parking Z

If a course-correcting brake application occurs,
red warning lamp C flashes in the exterior mir-
ror and a dual warning tone sounds. In addition,
display D underlining the danger of a side col-
lision appears in the multifunction display.
In very rare cases, the system may make an
inappropriate brake application. A course-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-
able in the speed range between 20 mph
(30 km/h) and 120 mph (200 km/h).
Either no braking application, or a course-cor-
recting brake application adapted to the driving
situation occurs if: R
there are vehicles or obstacles, e.g. crash
barriers, located on both sides of your vehicle. R
a vehicle approaches you too closely at the
side. R
you have adopted a sporty driving style with
high cornering speeds. R
you clearly brake or accelerate. R
a driving safety system intervenes, e.g. ESP ®
or PRE-SAFE ®
Brake.R
ESP ®
is switched off.R
a loss of tire pressure or a defective tire is
detected.
Switching on Active Blind Spot Assist X
Make sure that Active Blind Spot Assist is
activated in the on-board computer
( Y
page 248).X
Turn the SmartKey to position 2 in the ignition
lock.
Warning lamps C in the exterior mirrors light
up red for approximately 1.5 seconds. Gray
radar waves propagating 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 your vehicle by means of multifunction
camera C at the top of the windshield. Various
different areas to the front, rear and side of your
vehicle are also monitored with the aid of the
radar sensor system. Active Lane Keeping
Assist detects lane markings on the road and
can warn you before you leave your lane unin-
tentionally. If you do not react to the warning, a
lane-correcting application of the brakes can
bring the vehicle back into the original lane.
Important safety notes If you fail to adapt your driving style, Active Lane
Keeping Assist can neither reduce the risk of
accident nor override the laws of physics. 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, for braking in good time and for staying in
your lane.
Active Lane Keeping Assist cannot continuously
keep your vehicle in its lane.
G WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can: R
give an unnecessary warning and then
make a course-correcting brake application
to the vehicle R
not give a warning or intervene
There is a risk of an accident.222
Driving systems
Driving and parking

Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you. Ter-
minate the intervention in a non-critical driv-
ing situation.
The system may be impaired or may not function
if: R
there is poor visibility, e.g. due to insufficient
illumination of the road, or due to snow, rain,
fog or spray R
there is glare, e.g. from oncoming traffic, the
sun or reflections (e.g. when the road surface
is wet) R
the windshield is dirty, fogged up, damaged or
covered, for instance by a sticker, in the vicin-
ity of the camera R
the radar sensors in the front or rear bumpers
or the radiator trim are dirty, e.g. obscured by
snow R
there are no, several or unclear lane markings
for a lane, e.g. in areas with road construction
work R
the lane markings are worn away, dark or cov-
ered 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 detec-
ted R
the lane markings change quickly, e.g. lanes
branch off, cross one another or merge R
the road is narrow and winding R
there are strong shadows cast on the road
If no vehicle is detected in the adjacent lane and
broke n lane markings are detected, no lane-cor-
re
cting brake application is made.
Warning vibration in the steering wheel
A warning may be given if a front wheel passes
over a lane marking. It will warn you by means of
intermittent vibration in the steering wheel for
up to 1.5 second s.
Lane -correcting brake application
If you leave your lane, under certain circumstan-
ces the vehicle will brake briefly on one side.
This is meant to assist you in bringing the vehicle
back to the original lane. G WARNING
A lane-correcting brake application cannot
always bring the vehicle back into the original
lane. There is a risk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assist warns
you or makes a lane-correcting brake appli-
cation.
If a lane-correcting brake application occurs,
display C appears in the multifunction display.
The brake application also slightly reduces vehi-
cle speed.
This function is available in the range between
40 mph and 120 mph (60 km/h and 200 km/h).
A lane-correcting brake application can be made
after driving over a lane marking detected as
being solid or broken. Before this, a warning
must be given by means of intermittent vibration
in the steering wheel. In addition, a lane with
lane markings on both sides must be recog-
nized.
In the case of a broken lane marking being
detected, a lane-correcting brake application
can only be made if a vehicle has been detected
in the adjacent lane. Oncoming vehicles, over-
taking vehicles and vehicles in adjacent lanes
can be detected.
i A further lane-correcting brake application
can only occur after your vehicle has returned
to the original lane.
No lane-correcting brake application occurs if: R
you clearly and actively steer, brake or accel-
erate. R
you cut the corner on a sharp bend. R
you have switched on the turn signal. R
a driving safety system intervenes, e.g. ESP ®
,
PRE-SAFE ®
Brake or Active Blind Spot Assist.Driving systems 223
Driving and parking Z

R
you hav e adopte d a sport y drivin g style wit h
high cornering speeds or high rates of accel-
eration .R
ES P ®
is switched off .R
th e transmission is no t in position D .R
a loss of tire pressur e or a defective tire has
been detecte d and displayed.R
an obstacle in th e lan e in whic h you are drivin g
has been detected.
Active Lan e Keepin g Assis t may no t detec t other
roa d user s or traffic situations. An inappropriat e
brak e application may be interrupted at any time
if you: R
steer slightly in th e opposit e directionR
switch on th e tur n signalR
clearly brak e or accelerate
A lane-correcting brak e application is interrup-
te d automatically if: R
a drivin g safet y system intervenes, e.g. ES P ®
,
PRE-SAF E ®
Brake or Active Blind Spot Assist.R
lan e marking s can no longer be recognized.
Activating/deactivating Active Lan e
Keeping Assis t
X
To activate: press butto n D .
Indicato r lamp C lights up. The Lan e Keep‐
ing Assist On message appears in th e mul-
tifunction display. If all condition s hav e been
satisfied, a warnin g or steerin g intervention
may be made .
If you drive at speeds abov e 40 mph
(60 km/h) and lan e marking s are detected,
th e lines in th e assistanc e graphic s display
( Y
page 246) are shown in green . Active Lan e
Keepin g Assis t is read y for use.X
To deactivate: press butto n D .
Indicato r lamp C goe s out . The Active Lan e
Keepin g Assis t is deactivated. The Lan e Keepin g Assist Off message appears in
th e multifunction display.
Selecting Standar d or Adaptive setting X
In th e DriveAssist men u on th e on-boar d
computer, select th e Active Lan e Keep‐
ing Assist function ( Y
page 248).X
Selec t Standard or Adaptive .
Whe n Standard is selected, no warnin g vibra-
tion occur s if: R
you switch on th e tur n signals. In this event ,
th e warnings are suppressed for a certain
period of time. R
a drivin g safet y system intervenes, suc h as
ABS, BA S or ES P ®
.
Whe n Adaptive
is selected, no warnin g vibra-
tion occur s if: R
you switch on th e tur n signals. In this event ,
th e warnings are suppressed for a certain
period of time. R
a drivin g safet y system intervenes, e.g.
ABS, BA S or ES P ®
.R
you accelerate hard, e.g. kickdown .R
you brak e hard. R
you steer actively, e.g. swerve to avoid an
obstacle or chang e lanes quickly.R
you cut th e corner on a shar p bend.
In order that you are warned only when neces-
sar y and in goo d time if you cross th e lan e mark-
ing, th e system recognizes certain condition s
and warn s you accordingly.
The warnin g vibration occur s earlier if:R
you approac h th e outer lan e marking on a
bend. R
th e roa d has ver y wide lanes, e.g. a highway.R
th e system recognizes soli d lan e markings.
The warnin g vibration occur s later if:R
th e roa d has narrow lanes. R
you cut th e corner on a bend.
PLUG ‑ IN HYBRID operation
Points to rememb er
Gene ra l notes
Hybrid technology combine s a fuel efficien t
internal combustion engin e wit h a powerful
electric motor. In HYBRID mode, th e hybrid224
PLUG ‑ IN HYBRID operation
Driving and parking