
also activate DISTRONIC PLUS when driving
at speeds below 20 mph (30km/h). If the
vehicle in front is no longer detected and
displayed, for example because it has
changed lanes, DISTRONIC PLU Sis
deactivated. You will hear awarning tone if
this is the case.
i If you do no tfully release the accelerator
pedal, the DISTRONIC PLUS Override message appears in the multifunction
display. The set distance to a slower-
moving vehicle in front will then not be
maintained. You will be driving at the speed
you determine by the position of the
accelerato rpedal.
Activating when driving towards a
stationary vehicle Cruise control lever
X
Briefly pull the cruise control lever toward
you 0003, up 0002or down 0027.
DISTRONIC PLUS is selected.
X To adjust the set speed in 1 mph
increments (1 km/h increments): briefly
press the cruise control lever up 0002to the
pressure point for a higher speed or down
0027 for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
or
X To adjust the set speed in 5 mph
increments (10 km/h increments):
briefly press the cruise control lever up
0002 past the pressure point for a higher
speed or down 0027for a lower speed.
Every time the cruise control lever is
pressed up or down, the last speed stored
is increased or reduced.
If the vehicle in fron tofyou is stationary, you
can only activate DISTRONIC PLUS once your
vehicle is stationary as well.
i DISTRONIC PLUS can only be activated at
under 20 mph (30km/h) if a vehicle in front
has been detected. Therefore, the
DISTRONIC PLUS distance display in the
instrumen tcluster should be activated
(Y page 230).
i You can use the cruise control lever to set
the stored speed and the control on the
cruise control lever to set the specified
minimum distance (Y page 191).
Pulling away and driving Cruise control lever
If you depress the brake, DISTRONIC PLUS is
deactivated unless your vehicle is stationary.
X
If the vehicle in front pulls away: remove
your foot fro mthe brake pedal.
X Briefly pull the cruise control lever towards
you 0003or press it up 0002or down 0027.
or
X Accelerate briefly.
Your vehicle pulls away and adapts its
speed to that of the vehicle in front.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control. Driving systems
189Driving and parking Z

If DISTRONIC PLUS detects that the vehicle
in front has slowed down, it brakes your
vehicle. It maintains the preset distance to
the vehicle in front.
If DISTRONIC PLUS detects that there is a risk
of a collision, you will be warned visually and
acoustically. DISTRONIC PLUS cannot
prevent a collision withou tyour intervention.
An intermittent warning tone will then sound
and the distance warning lamp will light up in
the instrument cluster. Brake immediately in
order to increase the distance from the
vehicle in front, or take evasive action,
provided it is safe to do so.
If DISTRONIC PLUS detects a faster-moving
vehicle in front, it increases the driving speed.
However, the vehicle is only accelerated up
to the speed you have stored.
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),
DISTRONIC PLUS supports you if:
R you are driving faster than 40mph
(60 km/h).
R DISTRONIC PLUS is maintaining the
distance to a vehicle in front.
R you have switched on the corresponding
turn signal.
R DISTRONIC PLUS does not detect a danger
of collision.
If these conditions are fulfilled, your vehicle
is accelerated. Acceleration will be
interrupted if changing lanes takes too long
or if the distance between your vehicle and
the vehicle in front becomes too small. Stopping G
WARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if:
R there is a malfunction in the system or in
the voltage supply.
R DISTRONIC PLUS has been deactivated
with the cruise control lever, e.g. by a
vehicle occupant or from outside the
vehicle.
R the electrical system in the engine
compartment, the battery or the fuses have
been tampered with.
R the battery is disconnected.
R the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
Deactivating DISTRONIC PLUS
(Y page 193).
If DISTRONIC PLUS detects that the vehicle
in front is stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake. After a time, the electric parking brake
secures the vehicle and relieves the service
brake.
Depending on the specified minimum
distance, your vehicle will come to a standstill
at a sufficient distance behind the vehicle in
front.T he specified minimum distance is set
using the control on the cruise control lever.
The electric parking brake automatically
secures the vehicle if DISTRONIC PLUS is
activated and:
R the driver's door is open and the driver's
seat belt is unfastened.
R the engine is switched off, unless it is
automatically switched off by the ECO
start/stop function. 190
Driving systemsDriving and parking

Parking tips:
R
On narrow roads, drive as close to the
parking space as possible.
R Parking spaces that are littered, overgrown
or partially occupied by trailer drawbars
might be identified incorrectly or not at all.
R Snowfall or heavy rain may lead to a parking
space being measured inaccurately.
R The way your vehicle is positioned in the
parking space after parking is dependent
on various factors. These include the
position and shape of the vehicles parked
in fronta nd behind it and the conditions of
the location. In some cases, Active Parking
Assist may guide you too fa rinto a parking
space, or not far enough into it. In some
cases, it may also lead yo uacross or onto
the curb .Ifnecessary, you should cancel
the parking procedure with Active Parking
Assist.
R You can also engage forward gear
prematurely. The vehicle redirects and
does not drive as far into the parking space.
Should a gear be changed too early, the
parking procedure will be canceled. A
sensible parking position can no longer be
achieved from this position.
Exiting aparking space Active Parking Assist can only assist you with
exiting a parking space if you have parked the
vehicle using Active Parking Assist.
X Start the engine.
X Switch on the turn signal on the side facing
the street.
X Shift the transmissio ntoposition Dor R.
The Start Park Assist? Yes: OK No: 001Fmessage appears in the multifunction
display.
X To cancel the procedure: press the
001F button on the multifunction steering
wheel or pull away.
or X
To exit aparking space using Active
Parking Assist: press the000Fbutton on
the multifunctio nsteering wheel.
The Park Assist Active Accelerate and Brake Observe Surroundings
message appears in the multifunction
display.
X Let go of the multifunctio nsteering wheel.
X Reverse the vehicle or drive forwards, being
ready to brake at all times. Do not exceed
a maximum speed of approximately
6 mph (10 km/h) when exiting a parking
space .Otherwise Active Parking Assist will
be canceled.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
X Shift the transmission to position Dor Ras
required while the vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
i You will achieve the best results by
waiting for the steering procedure to
complete before pulling away.
If you back up after activation, the steering
wheel is moved to the straight-ahead
position.
X Drive forwards or back up the vehicle, being
ready to brake at all times.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
X Drive forwards and back up as instructed
by the PARKTRONIC warning displays.
Once you have exited the parking space
completely, the steering whee lis moved to
the straight-ahead position. You hear a tone
and the message Park Assist Finished appears in the multifunction display. You will
then have to steer and merge into traffic on
your own. PARKTRONIC is still available.
Canceling Active Parking Assist
You can cancel Active Parking Assist at any
time. Driving systems
209Driving and parking Z

ATTENTION ASSIST assesses your level of
fatigue or lapses in concentratio nby taking
the following criteria into account:
R your personal driving style, e.g. steering
characteristics
R journey details, e.g. time of day and length
of journey
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or
not occur at all:
R if the road condition is poor, e.g. if the
surface is uneven or if there are potholes
R if there is a strong side wind
R if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
R if you are predominantly driving slower
than 50 mph (80 km/h) or faster than
112 mph (180 km/h)
R if you are currently using COMAND or
making a telephone call wit hit
R if the time has been set incorrectly
R in active driving situations, such as when
you change lanes or change your speed
Warning and display messages in the
multifunction display X
Activate ATTENTION ASSIST using the on-
board computer (Y page 231).
Symbol 0002appears in the multifunction
display.
X The Attention Assist: Take a Break! message appears in the
multifunction display. If necessary, take
a break.
X Press the 000For001F button to confirm
the message. If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after your
journey has begun. In additio
nto the message
shown in the multifunction display, you will
then hear an intermittent warning tone twice.
On long journeys, take regular breaks in good
time to allow yourself to rest properly. If you
do not take a break and ATTENTION ASSIST
still detects increasing lapses in
concentration, you will be warned again after
15 minutes at the earliest.
ATTENTION ASSIST is reset when you
continue your journey and starts assessing
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 a change of drivers or
to take a break. Active Driving Assistance package
General notes The Active Driving Assistance package
consists of DISTRONIC PLUS (Y
page 186),
Active Blind Spot Assist (Y page 214) and
Active Lane Keeping Assist (Y page 218).
Active Blind Spot Assist Important safety notes
Active Blind Spot Assist is only an aid. It may
fail to detect some vehicles and is no
substitute for attentive driving. G
WARNING
Active Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles approaching and driving by with a
speed difference of more than
approximately 6.8 mph (11 km/h)
As a result, Active Blind Spot Assist may
neither give warnings nor intervene in such
situations. There is a risk of an accident. 214
Driving systemsDriving and parking

If the lanes are narrow, vehicles driving in the
lane beyond the lane next to yourv ehicle 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 driving at the
inner edge of their lanes.
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.
Two Active Blind Spot Assist radar sensors
are integrated into the fron tand rea rbumpers
respectively. An additional radar sensor is
located behind the cover in the radiator grill.
Make sure that the bumpers and the cover in
the radiator grill are free of dirt, ice or slush.
The rear sensors must no tbe covered, for
example by cycle racks or overhanging cargo.
Following a severe impact or in the event of
damage to the bumpers, have the function of
the radar sensors checked at a qualified
specialist workshop. Active Blind Spot Assist
may otherwise no longer work properly.
Indicator and warning display 0002
Yellow indicator lamp/red warning lamp
Active Blind Spot Assist is not active at
speeds below approximately 20 mph
(30 km/h). Vehicles in the monitoring range
are then not indicated.
When Active Blind Spot Assist is activated,
indicator lamp 0002in the exterior mirrors lights up yellow at speeds of up to
20 mph(30km/h). At speeds above 20 mph
(30km/h), the indicator lamp goes out and
Active Blind Spot Assist is operational.
If a vehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
20 mph (30km/h), warning lamp
0002on the
corresponding side lights up red. This warning
is always given 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 7mph (12km/h).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Active Blind
Spot Assist is no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light.
Visual and acoustic collision warning When 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 then hear
a double warning tone and red warning
lamp 0002flashes. If the turn signal remains on,
detected vehicles are indicated by the
flashing of red warning lamp 0002.There are no
further warning tones. 216
Driving systemsDriving and parking

(Y
page 231 )are activated in the on-board
computer.
X Turn the SmartKey to position 2in the
ignitio nlock.
Warning lamps 0002in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Active Lane Keeping Assist 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. Lane Keeping Assist cannot take into
account the road, traffic and weather
conditions. Lane Keeping Assist is merely 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 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.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you.
Terminate the intervention in a non-critical
driving 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
vicinity of the camera
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
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 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 lane
General notes Active Lane Keeping Assist monitors the area
in front of your vehicle by means of
camera 0002at the top of the windshield. Active
Lane Keeping Assist detect slane markings on
the road and warns you before you leave your
lane unintentionally. If you do no treact to the
warning, a lane-correcting application of the
brakes can bring the vehicle back into the
original lane. 218
Driving systemsDriving and parking

No lane-correcting brake application occurs
if:
R
you clearly and actively steer, brake or
accelerate.
R you cut the corner on a sharp bend.
R you have switched on the turn signals.
R a driving safety system intervenes, e.g.
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist.
R you have adopted a sporty driving style with
high cornering speeds or high rates of
acceleration.
R ESP ®
is switched off.
R the transmission is not in position D.
R a loss of tire pressure or a defective tire has
been detected and displayed.
Active Lane Keeping Assist does not detect
traffic situations or road users. An
inappropriate brake application may be
interrupted at any time if you:
R steer slightly in the opposite direction
R switch on the turn signal
R clearly brake or accelerate
Al ane-correcting brake applicatio nis
interrupted automatically if:
R a driving safety system intervenes, e.g.
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist.
R lane markings can no longer be recognized.
Switching on Active Lane Keeping Assist X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or
Adaptive (Y
page 231).
Symbol 0002appears in the multifunction
display. If
Standard is selected, no warning
vibration occurs if:
R you have switched on the tur nsignals .In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety syste mintervenes, such
as ABS, BAS or ESP ®
.
If Adaptive is selected, no warning
vibration occurs if:
R you have switched on the tur nsignals .In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety syste mintervenes, e.g.
ABS, BAS or ESP ®
.
R you accelerate hard, e.g .kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid
an obstacle or change lanes quickly.
R you cut the corner on a sharp bend. 220
Driving systemsDriving and parking

In the
Serv menu, you have the following
options:
R call up display messages (Y page 240)
R restart the tire pressure loss warning
system (Y page 551)
R check the tire pressure electronically
(Y page 552)
R call up the service due date Settings menu
Introduction In the
Sett. menu, you have the following
options:
R change the instrument cluster settings
(Y page 232)
R change the lights ettings (Ypage 233)
R change the vehicle settings (Y page 235)
R change the convenience settings
(Y page 235)
R restore the factory settings (Y page 232)
Restoring the factory settings X
Press the 0004or0008 button on the
steering wheel to select the Sett. menu.
X Press the 0007or0006 button to select the
Factory Setting submenu.
X Press the 000Fbutton to confirm.
The Reset All Settings? message
appears.
X Press the 0007or0006 button to select
No or
Yes .
X Press the 000Fbutton to confirm the
selection.
If you have selected Yes , the multifunction
display shows a confirmation message. For safety reasons, the
Daytime Running Lights function in the
Lights submenu is
only reset if the vehicle is stationary.
Instrument cluster Selecting the unit of measurement for
distance
The
Display Unit Speed-/Odometer: function allows you to choose whether
certain displays appear in kilometers or miles
in the multifunction display.
You can determine whether the multifunction
display shows some messages in miles or
kilometers.
X Press the 0004or0008 button on the
steering wheel to select the Settings menu.
X Press the 0007or0006 button to select the
Inst. Cluster submenu.
X Press the 000Fbutton to confirm.
X Press the 0007or0006 button to select the
Display Unit Speed-/Odometer: function.
You will see the selected setting:
km or
miles .
X Press the 000Fbutton to save the setting.
The selected unit of measuremen tfor
distance applies to:
R the digital speedometer in the Trip menu
R odometer and the trip odometer
R trip computer
R current consumption and the range
R the navigation instructions in the Navi menu
R cruise control
R DISTRONIC PLUS
R ASSYST PLUS service interval display 232
Menus and submenusOn-board computer and displays