G
WARNING
If you depress the brake, DISTRONIC PLUS is
deactivated unless yourv ehicle is stationary.
DISTRONIC PLUS then no longer brakes your
vehicle. In such cases, control the distance
from vehicles travellin ginfrontwith the brake
alone. You could otherwise cause an accident
and thereby injure yourself and others. The
drive rremains fully responsible for the vehi-
cle's distanc efrom other vehicles, the speed
being driven and for braking in good time.
Changing lanes
If you wish to change to the passing lane (in
countries where traffic drives on the right, the
passing lane is the left-hand lane), DIS-
TRONIC PLUS supports you if:
R you are driving faster than 60 km/h.
R DISTRONIC PLUS is maintaining the dis-
tanc etoav ehicle in front.
R you switch on the appropriate turn signals.
R DISTRONIC PLUS does not detec tadanger
of collision.
If these condition sare met, your vehicle is
accelerated. Acceleration will be interrupted
if changing lanes takes too long or if the dis-
tanc ebetween your vehicle and the vehicle in
fron tbecomes too small. G
WARNING
DISTRONIC PLUS and Active Blind Spot Assist
are only an aid designed to assist driving.
They do not relieve you of the responsibility
of paying attention .The driver remains fully
responsible for the vehicle's distance from
other vehicles, the vehicle's speed and for
braking in good time. 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.
Vehicles with COMAND APS/
Audio 50 APS
i The following function is not operational
in all countries. DISTRONIC PLUS uses additional information
from your navigation system so that it can
react appropriately to certain traffic situa-
tions. This is the case if, while following a
vehicle, DISTRONIC PLUS is active and you:
R
approach or drive through aroundabout
R approach aTjunction
R turn off at amotorway exit
Even if the vehicle in front leaves the detec-
tion range, DISTRONIC PLUS temporarily
maintains the current driving speed and does
not accelerate. This is based on the current
map data in the navigation system. Example: roundabout
The current speed is maintained:
R
approximately 10 seconds before the
roundabout/T junction and for approx-
imately 1.5 seconds when driving on the
roundabout
R approximately 12 seconds before reaching
am otorway exit and approximately 4sec-
onds after the motorway exit
Afterwards, the vehicle accelerates back to
the set speed you specified.
Stopping G
WARNING
Never get out of the vehicle when DISTRONIC
PLUS is activated.
DISTRONIC PLUS must also never be oper-
ated, activated or deactivated by apassenger
or from outside the vehicle.
DISTRONIC PLUS does not replace the park-
ing brake and must not be used for parking. Driving systems
175Driving and parking
Z
G
WARNING
Do not change downf or additional engine
braking on aslippery road surface. This could
cause the drive wheels to lose their grip and
the vehicle could skid.
You can set avariable or permanent limit
speed:
R variable for speed limits, e.g. in built-up
areas
R permanent for long-term speed restric-
tions, e.g. when driving with winter tyres
fitted (Y page 183) G
WARNING
Speedtronic is only an aid designed to assist
driving. You are responsible for the vehicle's
speed and for braking in good time.
i The speed indicated in the speedometer
may differ slightly from the limit speed
stored.
Variable SPEEDTRONIC General notes
With the cruise control lever, you can operate
cruise control or DISTRONIC PLUS and vari-
able SPEEDTRONIC.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off: cruise control or
DISTRONIC PLUS is selected.
R LIM indicator lamp on: variable SPEED-
TRONIC is selected.
You can use the cruise control lever to limit
the speed to any speed above 30 km/hw hile
the engine is running. :
To store the current speed or ahigher
speed
; LIM indicator lamp
= To store the current speed or to call up
the last stored speed
? To store the current speed or alower
speed
A To switch between cruise control or DIS-
TRONIC PLUS and variable SPEEDTRONIC
B To deactivate variable SPEEDTRONIC
Selecting variable SPEEDTRONIC
X Check whether LIM indicator lamp ;is on.
If it is on, variable SPEEDTRONIC is already
selected.
If it is not, press the cruise control lever in
the direction of arrow A.
LIM indicator lamp ;in the cruise control
lever lights up. VariableS PEEDTRONIC is
selected. G
WARNING
If there is achange of drivers, advise the new
driver of the limit speed stored.
Only use variable SPEEDTRONIC if you will not
have to accelerate suddenly to aspeed above
that stored as the limit speed. You could oth-
erwise cause an accident.
You can only exceed the limit speed stored if
you deactivate variable SPEEDTRONIC:
R using the cruise control lever
R by depressing the accelerator pedal
beyond the pressure point (kickdown) Driving systems
181Driving and parking
Z
1.0
mand red guid eline =indicates adis-
tance of approximatel y0.25 m. The distances
onl yapply to objects tha tare at ground level.
Blue guide lines :depict the width required
for the vehicle. They are usedtoa lign the
vehicl ewith the edge of the carriageway, e.g.
the kerb. ATTENTION ASSIST
Important safety notes ATTENTION ASSIST help
syou during long,
monotonous journey ssuch as on motorways
and trunk roads. It is active in the 80 km/h
to 180 km/h range.
If ATTENTION ASSIST detects typical indica-
tors of fatigu eorincreasing lapses in con-
centration on the part of the driver, it sug-
gests taking abreak. G
WARNING
ATTENTION ASSIST is only an aid and may
detect yourt iredness or lapses in concentra-
tion too late or not at all. It is not asubstitute
for aw ell reste dand attentiv edriver.
Fatigue may caus eyou to recognise hazard-
ous situations to olate ,misjudge asituation
or reac tslower. For this reason ,makes ure
you fee lreste dbefore you begin driving and
durin gyour journey. Always tak ebreaks in
good tim eand regularly, especiall yduring
lon gjou rneys. Otherwise, you may fail to rec-
ognise danger sintime, caus eanacciden tand
injure yoursel fand others.
ATTENTIO NASSIST assesses your level of
fatigu eorlapsesinc oncentration by taking
the following criteria into account:
R your persona ldriving style ,e.g. steering
characteristics
R driving conditions ,e.g. time ,driving time The functionality of ATTENTIO
NASSIST is
restricte dand warning smay be delaye dor
not occu ratall:
R if the roa dcondition is poor, e.g. if the sur-
face is uneven or if there are potholes
R if there is astrong sid ewind
R if you have adopted asport ydrivin gstyle
with high cornering speeds or high rates of
acceleration
R if you are predominantly drivin gslower
than 80 km/h or faster than 180 km/h
R if you are currently using COMAND APS or
making atelephon ecall with it
R if the tim ehas been set incorrectly
R in active drivin gsituations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display Example: vehicles with automatic transmission
X
Activate ATTENTION ASSIS Tusing the on-
board computer (Y page 224).
Symbol :appears in the multifunction
display.
If ATTENTION ASSIS Tisactive, you will be
warne dnosooner than 20 minutes after your
journey has begun. You will the nhear an
intermittentw arning tonetwice, and the
Attention Assist :Timef orab reak? message appears in th
emultifunction dis-
play.
X If necessary, tak eabreak.
X Pres sthe a button to confir mthe mes-
sage.
On long journeys, take regula rbreaks in good
time to allow yourself to rest properly. If you
do not take abreak and ATTENTION ASSIST 194
Driving systemsDriving and parking
still detects typical indicators of fatigue or
increasing lapses in concentration, you will be
warned againa fter 15 minutes at the earliest.
ATTENTION ASSIST is reset whe nyou con-
tinue you rjourney and it startsa ssessing your
tiredness again if:
R you switch off the engine.
R you take off your seat belt and open the
driver's door, e.g. for achange of drivers or
to take abreak. Speed Limit Assist
Important safety notes i
Speed Limit Assist is not operational in all
countries.
Speed Limit Assist shows you detected speed
limits in the multifunction display .Data from
th en avigation system is also used for this
purpose. The display appear sifatraffic sign
indicating aspee dlimit or th eend ofas peed
limit is detected. If Speed Limit Assist does
no td etec tany traffic signs, the speed limit
from the digital roa dmap is take nand shown
in the display.
Speed Limit Assist detects the traffic signs
with acamera at the top of the windscreen. :
Speed Limit Assist camera G
WARNING
Speed Limit Assist is only an aid and may
detect speed limit signs 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 there is glare, e.g. from the sun or from
oncoming traffic.
R the windscreen is dirty, misted up or cov-
ered, for instance by asticker, in the vicinity
of the camera.
R the traffic signs are covered, for instance
by dirt, snow or trees.
R the traffic signs are poorly illuminated.
R there are ambiguous traffic signs, for
instance near roadworks or on multi-lane
roads.
Traffic signs always have priority over the
Speed Limit Assist display. Speed Limit Assist
cannot detect road and traffic conditions. It is
not asubstitute for attentive driving.
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.
Information in the multifunctio ndisplay Example
:vehicles with automatic transmission
: Traffic sign indicatin gaspeed limit or the
end of aspeed limit
; Speed Limit Assist is available and the
warning function is switched on in the on-
board computer
= Unit sused in the traffic sign displayed Driving systems
195Driving and parking Z
Briefly showing detecte
dtraffi csigns in
the multifunction display
When yo uactivate the Speed Limi tAssist
warning function,at raffic sign indicating the
speed limit or end of speed limit zone :may
appearint he multifunction display. The traffic
sign appears for approximately five seconds
as soon as it is detected. Any other informa-
tion in the multifunction displayish idden for
this period.
X Activate the Speed Limit Assist warning
function using the on-board computer
(Y page 222).
Symbol ;appears.
Permanently showing detected traffic
signs in the multifunction display
If Speed Limit Assist is selected in the on-
board computer, atraffic sign indicating the
speed limit or end of aspeed limit zone :
appears in the multifunction displayass oon
as it is detected.
Traffic sign indicating aspeed limit :is gen-
erally displayed until:
R at raffic sign indicating the end of the speed
limit is detected.
R you make aturn.
R you leave or enter acityort own.
R the road type changes (e.g. motorway,
country road).
R you have travelled acertain minimum dis-
tanc ewithout the traffic sign being repea-
ted or detected again.
X Display Speed Limit Assist using the on-
board computer (Y page 222).Lane Tracking package
Genera lnotes The Lane Tracking package consists of Blind
Spot Assist (Y page 196)and Lane Keeping
Assist (Y page 198). Blind Spot Assist Important safet
ynotes
Blind Spot Assist uses aradar senso rsystem
to monitor th eareas on bot hside sofy our
vehicle. Blind Spot Assis tprovide sassistance
at speeds higher than 30 km/h. Awarning
display in the exterior mirrors draw syour
attention to detected vehicles in the moni-
tored area .Ifyou then switch on the corre-
sponding turn signa ltochange lane, you will
alsor eceive avisual and acoustic collision
warning. The Blind Spot Assist monitoring
system usess ensors in the rear bumper. 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 motorcycle sorbicycles, or
only detect them too late.
Monitoring may be affected by dirty sensors,
strong spray 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
yours urroundings. Otherwise, you may fail to
recognise danger sintime, caus eanaccident
and injure yourself and others.
The radar sensor system is automatically
deactivate dnearradio telescope facilities
(Y page 345).
For Blin dSpotA ssist to assist you when driv-
ing, the radar sensor system must be activa-
ted (Y page 229) and operational.
Monitoring range of the sensors
Blind Spot Assist monitors the area up to
three metres behind your vehicle and directly
next to your vehicle, as shown in the diagram. 196
Driving systemsDriving and parking
R
the lane markings ar eworna way, dark or
covered up ,e.g.byd irtors now.
R the distance to the vehicl einfront is too
small and the lane marking sthu sc anno tbe
detected.
R the lane markings on the road are unclear,
e.g. near roadworks.
R the lane markings chang equickly, e.g.
lanes branc hoff, cros sone another or
merge.
R the road is narro wand winding.
Lane Keeping Assist cannot detec troad 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
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourself and oth-
ers.
Aw arning may be given if afront wheel
passes over alane marking. It will warn you
by means of intermittentv ibration in the
steering wheel for up to 1.5 seconds.
Activating Lane Keeping Assist
X Symbol :appears in the multifunction
display. Active Driving Assistance package
General notes The Active Drivin
gAssistance package con-
sists of DISTRONIC PLUS (Y page 171), Active
Blind Spot Assist (Y page 199) and Active
Lane Keeping Assist (Y page 202).
Active Blind Spot Assist Important safety notes
Active Blind Spot Assist uses
aradar sensor
system to monitor the side areas of your vehi- cle that are behind the driver.
Awarning dis-
play in th eexteri or mirror sdraws your atten-
tio ntod etected vehicles in the monitored
area. If you then switch on the corresponding
turn signal to change lane, you will also
receive avisual and acoustic collision 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 also uses
the forward-facin gradar sensor system.
Active Blind Spot Assist provides assistance
at speeds higher than about 30 km/h. G
WARNING
Active Blind Spot Assist is only an aid and may
detect vehicles/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 front sensors are 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-
tancea nd then enter the blind spot area.
Active Blind Spot 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
conditions and your surroundings. Otherwise,
you may fail to recognise dangers in time,
cause an accident and injure yourself and oth-
ers.
The radar sensor system is automatically
deactivated near radio telescope facilities
(Y page 345).
For Active Blind Spot Assist to assist you
when driving, the radar sensor system must
be activated (Y page 229) and operational. Driving systems
199Driving and parking Z
30 km/h, warning lamp
:on the corre-
sponding sid elights up red. Thi swarning is
always emitted whe navehicle 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. G
WARNING
Active Blind Spot Assist is not active at speeds
below 30 km/h. The indicator lamps in the
exterior mirrors are yellow.V ehicles 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 yourself and others.
Visua land acoustic collisio nwarning
If you switch on the appropriate turn signals
to change lanes, and avehicle is detected in
the side monitoring range of Active Blind Spot
Assist ,you will receive avisual and acoustic
collision warning. You will then hear adouble
warning tone, and red warning lamp :
flashes. If the turn signal remains on, detec-
ted vehicles are indicated by the flashing of
red warning lamp :.There are no further
warning tones.
Course-correcting brak eapplication
If Active Blind Spot Assist detects arisk of a
lateral collision in the monitoring range, a
course-correcting brake application is carried
out. This is designed to help you avoid acol-
lision.
The course-correcting brake application is
available in the range between 30 km/ha nd
200 km/h.
If ac ourse-correcting brake application
occurs, red warning lamp :flashe sinthe exterio
rmirro rand the following is shown in
the multifunctio ndisplay, for example: Example: vehicles with automatic transmission
G
WARNING
Activ eBlindS pot 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 sufficien ttoavoid
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,
correc tsteerin gand for braking in good time.
Alway sadapt your drivin gstyle 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 others.
Either avery slight course-correcting brake
application, or none at all, may occur 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. Driving systems
201Driving and parking Z
R
the lane markings change quickly, e.g.
lanes branch off ,cros sone anothe ror
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 steering correctly. Always adapt your
driving style to suitt he prevailing road and
weather conditions.A lways pay attention to
traffic condition sand your surroundings. Oth-
erwise, you may fail to recognise danger sin
time, cause an accident and injure yourself
and others.
Warning vibration in th esteering wheel
Aw arnin gmay be given if afront wheel
passes over alane marking. You will be
warned by way of intermitten tvibrations in
the steerin gwheel for up to 1. 5seconds.
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 occur searlier if:
R you approach the outer lane markin gona
bend.
R the road has very wide lanes, e.g. amotor-
way.
R the system recognises solid lane markings.
The warning vibration occur slater if:
R the road has narrow lanes.
R you cut the corner on abend.
No warning vibration occur sif:
R you clearly and actively steer ,brake, or
accelerate.
R you cut the corner on asharp bend.
R ad riving safety system intervenes, such as
ABS, BASorE SP®
.
R you have switched on the turn signals. In
this event ,the warnings are suppressed for
ac ertain period of time. Lane-correcting brak
eapplication
If you leave your lane under certain circum-
stances, the vehicle will brake briefly on one
side. This is designed to help you bring the
vehicle back intot he original lane.
This function is available in the range between
60 km/ha nd 200 km/h.
Al ane-correctingb rake application can only
be made after driving over asolid, recognis-
able lane marking. Befor ethis, awarning
must be emitted by means of intermittent
vibration in the steering wheel. In addition, a
lane with lane markings on both sides must
be recognised. The brake application also
slightly reduces driving speed.
If al ane-correcting brake application occurs,
the following message appears in the multi-
function display: Example: vehicles with automatic transmission
i
Afurther lane-correcting brake applica-
tion can only occur after your vehicle has
returned to the original lane. G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid
designed to assist driving. It is not asubstitute
for attentive driving. Corrective braking may
not always be sufficient to return your vehicle
to its original lane. In such cases, you must
steer the vehicle yourself to ensure that it
does not leave the lane.
Active Lane Keeping Assist cannot detect the
current traffic situation or other road users.
Ensure at all times that there is sufficient lat-
eral distance between you and other road
users or obstacles. In rare cases, broken lines
or certain structures on the road surface may
be detected by the system as solid lane mark- Driving systems
203Driving and parking
Z