wheel MERCEDES-BENZ B-CLASS HATCHBACK 2011 Repair Manual

Lane Keeping Assist
General notes
Lane Keeping Assist monitors the area in
fron tofy our vehicle by means of a camera at
the top of the windscreen .Lane Keeping
Assist detects lane markings on the road and
warns you before you leave your lane unin-
tentionally. :
Lane Keeping Assist camera
If you select km on the on-board computer in
the Display unit Speed-/odometer: function (Y
page 200), Lane Keeping Assist
is active starting at aspeed of 60 km/h. If the
miles display unit is selected, the assistance
range begins at 40 mph.
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 oncoming traffic,
the sun, or reflection from other vehicles.
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera
R several or no lane markings for a single lane
are present. 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 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 a substitute 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 acciden tand injure yoursel fand oth-
ers.
A warning may be given if a front wheel
passes ove ralane marking. It will warn you
by means of intermittent vibration in the
steering wheel for up to 1. 5seconds.
Activating Lane Keeping Assist Example: vehicles with automatic transmission
X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard or
Adaptive (Y
page 199).
Symbol :appears in the multifunction
display.
If you drive at speeds above 60 km/h and
lane markings are detected, symbol :is
highlighted. Lane Keeping Assist is ready
for use. 180
Driving systemsDriving and parking

permissible maximum speed for vehicle/
trailer combinations is above 100 km/h.
When towing a trailer, your vehicle's handling
characteristics will be differen tincomparison
to when driving without a trailer and it will
consume more fuel.
Change into a lower gear in good time on long
and steep downhill gradients. Vehicles with
automatic transmission: in order to do so, you
will need to have switched to manual drive
program Min advance (Y page 139).
i This also applies if you have activated
cruise control, SPEEDTRONIC or DIS-
TRONIC PLUS.
This will use the braking effect of the engine,
so less braking will be required to prevent the
vehicle from gaining speed. This relieves the
load on the brake system and prevents the
brakes from overheating and wearing too
quickly. If you need additional braking,
depress the brake pedal repeatedly rather
than continuously.
i Vehicles with automatic transmis-
sion: if the accelerator pedal is depressed
briefly on downhill gradients while manual
drive program Mis temporarily activated,
the automatic transmission may switch
back to the last active automatic drive pro-
gram Eor S.T he automatic transmission
may shift to a higher gear. This can reduce
the engine's braking effect.
Driving tips If the trailer swings from side to side:
X
Do not accelerate.
X Do not counter-steer.
X Brake if necessary. R
Maintain a greater distance from the vehi-
cle in front than when driving without a
trailer.
R Avoid braking abruptly. If possible, brake
gently at first to allow the trailer to run on.
Then, increase the braking force rapidly.
R The values given for gradient-climbing
capabilities from a standstill refer to sea
level. When driving in mountainous areas,
note that the power output of the engine,
and consequently the vehicle's gradient-
climbing capability, decrease with increas-
ing altitude. Folding out the ball coupling
G
WARNING
Make sure that the ball coupling is engaged,
either in its folded-out or folded-in position,
and that the indicator lamp is off.
Do not turn the release wheel when a trailer
is coupled up. Otherwise, the trailer might
detach.
Before you can tow a trailer with your vehicle,
you must fold out the ball coupling.
The release wheel is located behind the left-
hand side trim panel in the boot. X
To open the cover: turn handle:anti-
clockwise and fold down cover ;and
remove it. Towing
atrailer
183Driving an d parking Z

X
Pull out release wheel =.
X Turn release wheel =anti-clockwise as far
as it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator
lamp ?flashes. X
Pull the ball coupling in the direction of the
arrow until it engages in a vertical position.
Indicator lamp ?goes out. The power
socket folds down automatically.
The multifunction display shows the
Check trailer hitch lock display mes-
sage until the ball coupling is engaged.
X Remove the protective covering from the
ball coupling and store it in a safe place.
X Make sure that the ball of the ball coupling
is clean and that it is either greased or dry
(grease free), depending on the instruc-
tions for the trailer. Coupling up a trailer
G
WARNING
Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your hand could
become trapped between the bumper and
trailer drawbar.
X Make sure that the transmission is in posi-
tion P.
X Engage the electric parking brake.
X Position the trailer level behind the vehicle.
X Couple up the trailer.
X Establish the electrical connection
between the vehicle and the trailer.
X Check that the trailer lighting system is
working. Decoupling
atrailer G
WARNING
As soon as you raise the trailer drawbar, the
unladen vehicle rises slightly. The vehicle then
lowers to driving level.
Make sure tha tnobody is in the vicinity of the
wheel arch or the underbody. You could oth-
erwise trap yourself or others. G
WARNING
The vehicle is lowered as soon as you discon-
nect the trailer cable. Make sure that nobody
is in the vicinity of the wheel arch or the
underbody. You could otherwise trap yourself
or others.
As soon as you decouple the trailer, the unla-
den vehicle rises slightly. Make sure that you
or others are not injured in the process.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound-
ing of the overrun brake.
X Make sure that the transmission is in posi-
tion P.
X Engage the electric parking brake. 184
Towing
atrailerDriving an d parking

X
Secure the traile ragainst rolling away.
X Remove the trailer cable and decouple the
trailer. Folding in the ball coupling
G
WARNING
Make sure that no persons or animals are in
the pivoting range of the ball coupling. Other-
wise, they could be injured.
X Fold the ball coupling back in if you are not
using the trailer tow hitch.
X Place the protective covering on the ball
coupling.
The release wheel is located behind the left-
hand side trim panel in the boot. X
To open the cover: turn handle:anti-
clockwise and fold down cover ;and
remove it. X
Pull out release wheel =.
X Turn release wheel =anti-clockwise as far
as it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator
lamp ?flashes. X
Press the ball coupling in the direction of
the arrow until it engages behind the
bumper.
Indicator lamp ?goes out and the mes-
sage in the multifunction display disap-
pears. Trailer power supply
! You can connect accessories with a
power rating of up to 240 W to the perma-
nent power supply and with a power rating
of up to 180 W to the power supply that is
switched on via the ignition lock.
The trailer battery may not be charged from
the power supply.
X To switch the connected power supply
on or off: turn the key in the ignition lock
to position 2or 0respectively.
When it leaves the factory, your vehicle's
trailer socket is equipped with a permanent
power supply and a power supply that is
switched on via the ignition lock.
The permanent power supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin
10. Towing
atrailer
185Driving an d parking Z

The outside temperature display is in the mul-
tifunction display.
Changes in the outside temperature are dis-
played after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control (Y page 149) activated:
The segments light up from the stored speed
to the maximum speed.
Variable SPEEDTRONIC (Y page 151) activa-
ted:
The segments light up from the start of the
scale to the selected limit speed.
DISTRONIC PLUS (Y page 154) activated:
One or two segments in the set speed range
light up.
DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the vehi-
cle in fronta nd the stored speed light up. Operating the on-board computer
Overview :
Multifunctio ndisplay
; Switches on LINGUATRONIC; see the sep-
arate operating instructions
= Right control panel
? Left control panel
A Back button
X To activat ethe on-board computer: turn
the key to position 1in the ignition lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. Displays and operation
189On-board computer and displays Z

?
Menu bar
A Drive program
B Transmission position
X To show menu bar ?:press the =
or ; button on the steering wheel.
Menu bar ?is hidden after a few seconds.
Text field =shows the selected menu or
submenu as well as display messages.
i You can set the time using Audio 20 or
COMAND Online, see the separate Operat-
ing Instructions.
The following messages can appearint he
multifunction display:
Z Shift recommendation
(Ypage 134)
XjY Active Parking Assist
(Ypage 166)
¯ Cruise control (Y page 149)
LIM SPEEDTRONIC (Y
page 151)
è Rear window wiper
(Ypage 109)
_ Adaptive Highbeam Assist
(Ypage 101)
À ATTENTION ASSIST
(Ypage 175)
¤ ECO start/stop function
(Ypage 129)
Ä Speed Limit Assist
(Ypage 176)
à Lane Keeping Assist
(Ypage 180)
ë HOLD function (Y page 162)
Ä Distance warning signal
(Ypage 63)
120 km/h! Maximum permissible speed
exceeded (only for certain coun-
tries) Displays and operation
191On-board computer and displays Z

Trip menu
Standard display X
Press and hold the %button on the
steering wheel until the Trip menu with
trip meter :and total distance
recorder ;is shown.
Trip computer "From start" or "From
reset" Example: "From start" trip computer
:
Distance
; Time
= Average speed
? Average fuel consumption
X Press the =or; button on the steer-
ing wheel to select the Trip menu.
X Press the 9or: button to select
From start or
From reset .
The values in the From start submenu are
calculated fro mthe start of a journey whilst
the values in the From reset submenu are
calculated from the last time the submenu
was reset (Y page 194).
The From start trip computer is automati-
cally reset when:
R the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 kilometres have been exceeded. The
From reset trip computer is automati-
cally reset if the value exceeds 9,999 hours
or 99,999 kilometres.
Displaying the range and current fuel
consumption :
Approximate range
; Current fuel consumption
X Press the =or; button on the steer-
ing wheel to select the Trip menu.
X Press the 9or: button to select
current fuel consumption ;and approxi-
mate range :.
Approximate range :is calculated accord-
ing to the current driving style and the amount
of fuel in the tank. If there is only a small
amount of fuel left in the fuel tank, the display
shows a vehicle being refuelled Cinstead
of range :.
Digital speedometer :
Shift recommendation
; Digital speedometer
X Press the =or; button on the steer-
ing wheel to select the Trip menu.
X Press the 9or: button to select
digital speedometer ;.
For further information on gearshift recom-
mendations, see (Y page 134). Menus and submenus
193On-board computer and displays Z

i
If the gearshift recommendation is shown
in the multifunction display, it is not shown
in the status bar.
Resets values Example: resetting the trip computer "From start"
You can reset the values of the following func-
tions:
R
trip meter
R trip computer "From start"
R trip computer "From reset"
X Press the =or; button on the steer-
ing wheel to select the Trip menu.
X Press the 9or: button to select the
function that you wish to reset.
X Press a.
X Press the :button to select Yes and
press the abutton to confirm. Navigation menu
Displaying navigation instructions X
Switch on Audio 20 with Becker ®
MAP
PILOT or COMAND Online (see the sepa-
rate operating instructions).
X Press the =or; button on the steer-
ing wheel to select the Navi menu.
In the Navi menu, the multifunction display
shows navigation instructions. For more
information, see the separate operating
instructions. Route guidance not active :
Direction of travel
; Current street
Activated route guidance No change of direction announced
:
Distance to the destination
; Distance to the next change of direction
= Current street
? Symbol "follow the road's course"
Change of direction announced without a
lane recommendation :
Road to which the change of direction
leads
; Distance to change of direction and visual
distance display
= Change-of-direction icon
When a change of direction has been
announced, you will see visuald istance dis-
play ;next to the symbol for change of
direction =.This shortens from the bottom 194
Menus and submenusOn-board computer and displays

to the top of the display as you approach the
point of the announced change of direction.
Change of direction announced with a
lane recommendation :
Road to which the change of direction
leads
; Distance to change of directio nand visual
distance display
= Lane recommendation
? New lane during a change of direction
A Lane continues through change of direc-
tion
B Change-of-direction icon
On multi-lane roads, lane recommendation
= may be shown for the next change of
direction. During the change of direction,
additional lanes may be displayed.
Lane recommendations are only displayed if
the relevant data is availabl eonthe digital
map.
Other status indicators of the naviga-
tion system R
O:y ou have reached the destination or an
intermediate destination.
R New route... or
Calculating route :
calculating a new route
R Off map or
Off road :t
he vehicle position
is outside the area of the digital map (off-
map position).
R No route :n
o route could be calculated to
the selected destination. Audio menu
Selecting aradio station :
Waveband
; Channel frequency with memory position
i The memory position is only displayed
along with station ;if this has been
stored.
X Switch on Audio 20 or COMAND Online
(see the separate operating instructions)
and select Radio.
X Press the =or; button on the steer-
ing wheel to select the Audio menu.
X To selectas toredstation: briefly press
the 9 or: button.
X To select a station from the station
list: press and briefly hold the 9
or : button.
If no statio nlist is received:
X To select astation using the station
search: press and briefly hold the 9
or : button.
i For information on changing waveband
and storing stations, see the separate oper-
ating instructions.
i DAB radio mode ( DigitalAudioBroadcast-
ing); see the separate operating instruc-
tions. Menus and submenus
195On-board computer and displays Z

Audio player or audio media operation
Example: CD changer display
: Current CD in the CD changer
; Current track
Audio data from various audio devices or
media can be played, depending on the equip-
ment fitted in the vehicle.
X Switch on Audio 20 or COMAND Online and
select the audio device or medium (see the
separate operating instructions).
X Press the =or; buttononthe steer-
ing wheel to select the Audio menu.
X To selectt he next/previous track:
briefly press the 9or: button.
X To select a track from the track list
(rapid scrolling): press and hold the
9 or: button until desired
track ;has been reached.
If you press and hold the 9or: but-
ton, the rapid scrolling speed is increased.
Not all audio devices or media support this
function.
If track information is stored on the audio
device or medium, the multifunction display
will show the numbe rand title of the track.
The current trac kdoes not appear in audio
AUX mode (Auxiliary audio mode: external
audio source connected). Video DVD operation Example: DVD changer display
:
Current DVD in the DVD changer
; Current scene
X Switch on COMAND Online and select
video DVD (see the separate operating
instructions).
X Press the =or; button on the steer-
ing wheel to select the Audio menu.
X To select the next or previous scene:
briefly press the 9or: button.
X To select ascene from the scene list
(rapid scrolling): press and hold the
9 or: buttonuntil desired
scene ;has been reached. Telephone menu
Introduction G
WARNING
Observe the legal requirements of the country
in which you are currently driving regarding
the use of mobile phones in the vehicle.
If it is permitted to use mobile phones while
the vehicle is in motion, you should only use
them when the road and traffic conditions
allow. Otherwise, you may be distracted from
the traffic conditions, cause an accident and
injure yoursel fand others.
X Switch on the mobile phone and Audio 20
or COMAND Online (see the separate oper-
ating instructions).
X Place a mobile phone in the mobile phone
bracket (Y page 258) or establis haBlue-
tooth ®
connection with Audio 20 or 196
Menus and submenusOn-board computer and displays