2015 MERCEDES-BENZ B-CLASS HATCHBACK warning light

X
Start the engine.
X Release the electric parking brake.
X Switch on the turn signal in the direction you
will drive out of the parking space.
X Shift the transmission to position Dor R.
The Start Park Assist? Yes: OK No:
Start Park Assist? Yes: OK No:
message appears in the multifunction display %.
X To cancel the procedure: press the%
button on the multifunction steering wheel or
pull away.
or X To exit a parking space using Active Park-
ing Assist: press theabutton on the mul-
tifunction steering wheel.
The Park Assist active Accelerate
Park Assist active Accelerate
and brake Observe surroundings
and brake Observe surroundings mes-
sage appears in the multifunction display.
X Release the multifunction steering wheel.
X Pull away, being ready to brake at all times. Do
not exceed a maximum speed of approx-
imately 10 km/h when exiting a parking
space. Otherwise, Active Parking Assist will
be cancelled.
X Stop when PARKTRONIC sounds the contin-
uous warning tone, if not before.
X Depending on the message or as required,
shift the transmission to position Dor R.
Active Parking Assist immediately steers in
the other direction. The Park Assist Park Assist
active
active Accelerate
Accelerate and
andbrake
brake Observe
Observe
surroundings
surroundings message appears in the mul-
tifunction display.
i You will achieve the best results by waiting
for the steering procedure to complete before
pulling away.
If you reverse after activation, the steering
wheel is moved to the straight-ahead posi-
tion.
X Drive forwards and reverse as prompted by
the PARKTRONIC warning displays, several
times if necessary.
X Stop when PARKTRONIC sounds the contin-
uous warning tone, if not before.
Once you have exited the parking space com-
pletely, the steering wheel is moved to the
straight-ahead position. You hear a tone and the
Park
Park Assist
Assist switched switched off
offmessage appears
in the multifunction display. You will then have
to steer and merge into traffic on your own.
PARKTRONIC is still available. You can take over the steering before the vehicle has exited the
parking space completely. This is useful, for
example, when you recognise that it is already
possible to pull out of the parking space.
Cancelling Active Parking Assist X
Stop the movement of the multifunction
steering wheel or steer yourself.
Active Parking Assist will be cancelled at
once. The Park Assist cancelled
Park Assist cancelled mes-
sage appears in the multifunction display.
or
X Press the PARKTRONIC button (Y page 157).
PARKTRONIC is switched off and Active Park- ing Assist is immediately cancelled. The
Park Assist cancelled Park Assist cancelled message appears
in the multifunction display.
Active Parking Assist is cancelled automatically
if:
R the electric parking brake is applied
R transmission position Pis selected
R parking using Active Parking Assist is no lon-
ger possible
R you are driving faster than 10 km/h
R a wheel spins and ESP ®
intervenes or fails.
The ÷ warning lamp lights up in the instru-
ment cluster.
A warning tone sounds. The parking symbol dis-
appears and the multifunction display shows the
Park Assist cancelled Park Assist cancelled message.
When Active Parking Assist is cancelled, you
must steer and brake again yourself.
If a system malfunction occurs, the vehicle is
braked to a standstill. To drive on, depress the
accelerator pedal again. Driving systems
161Driving and parking Z

:
Yellow guide line at a distance of approx-
imately 4.0 m from the rear of the vehicle
; White guide line without turning the steering
wheel, vehicle width including the exterior
mirrors (static)
= Yellow guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
? Yellow lane marking the course the tyres will
take at the current steering wheel angle
(dynamic) A
Yellow guide line at a distance of approx-
imately 1.0 m from the rear of the vehicle
B Vehicle centre axis (locating aid)
C Bumper
D Red guide line at a distance of approximately
0.30 m from the rear of the vehicle :
Front warning display
; Additional PARKTRONIC measurement
operational readiness indicator
= Rear warning display
Vehicles with PARKTRONIC: when
PARKTRONIC is operational (Y page 157), addi-
tional measurement operational readiness indi-
cator ;appears in the Audio 20/COMAND
Online display. If the PARKTRONIC warning dis-
plays are active or light up, warning displays :
and =are also active or light up correspond-
ingly in the Audio 20/COMAND Online display.
"Reverse parking" function Reversing straight into a parking space
without turning the steering wheel
:
White guide line without turning the steering
wheel, vehicle width including the exterior
mirrors (static)
; Yellow guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
= Yellow guide line at a distance of approx-
imately 1.0 m from the rear of the vehicle
? Red guide line at a distance of approximately
0.30 m from the rear of the vehicle Driving systems
163Driving and parking Z

Warning display
:
Warning display
Blind Spot Assist is not active at speeds below
approximately 30 km/h. Vehicles in the moni-
toring range are then not indicated.
If Blind Spot Assist is activated, indicator
lamp :in the exterior mirrors lights up yellow
up to a speed of 30 km/h. At speeds above
30 km/h, the indicator lamp goes out and Blind
Spot Assist is operational.
If a vehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
30 km/h, warning lamp :on the correspond-
ing side lights up red. This warning always
occurs 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
12 km/h.
The yellow indicator lamp goes out if reverse
gear is engaged. Blind Spot Assist is then deac- tivated.
The brightness of the indicator/warning lamps
is adjusted automatically according to the ambi-
ent light.
Collision warning
If a vehicle is detected in the monitoring range of
Blind Spot Assist and you switch on the corre-
sponding turn signal, a double warning tone
sounds. Red warning lamp :flashes. If the turn
signal remains on, detected vehicles are indica-
ted by the flashing of red warning lamp :.
There are no further warning tones. Activating Blind Spot Assist
X Make sure that Blind Spot Assist is activated
in the on-board computer (Y page 183).
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 General notes
Lane Keeping Assist monitors the area in front of
your vehicle by means of multifunction cam-
era :attached at the top of the windscreen.
Lane Keeping Assist detects lane markings on
the road and can warn you before you leave your lane unintentionally.
This function is available in a speed range
between 60 km/h and 200 km/h.
A warning may be given if a front wheel passes
over a lane marking. It will warn you by means of intermittent vibration through the steering
wheel for up to 1.5 seconds.
Important safety notes G
WARNING
Lane Keeping Assist cannot always clearly
identify lane markings.
In these cases, Lane Keeping Assist may:
R give an unnecessary warning
R not give a warning
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep in lane, especially if Lane
Keeping Assist alerts you. 170
Driving systemsDriving and parking

Useful information
i This Owner's Manual describes all models,
series and optional equipment for your vehi-
cle that were available at the time of going to
press. National variations are possible. Note
that your vehicle may not be equipped with all
of the functions described. This is also the
case for systems and functions relevant to
safety.
i Read the information on qualified specialist
workshops: (Y page 23). Important safety notes
G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is a risk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the
surrounding conditions, pull over to a safe
location and make entries only while the vehi-
cle is stationary.
You must observe the legal requirements for the country in which you are currently driving whenoperating the on-board computer. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognise function
restrictions relevant to safety. The operating
safety of your vehicle may be impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows messages or warnings from certain systems in the multifunc-tion display. You should therefore make sure
your vehicle is operating safely at all times.
If the operating safety of your vehicle is
impaired, park the vehicle safely as soon as pos- sible. Contact a qualified specialist workshop. For an overview, see the instrument panel illus-
tration (Y page 27). Displays and operation
Instrument cluster lighting
The light sensor in the instrument cluster auto-
matically controls the brightness of the multi-
function display. In daylight, the displays in the
instrument cluster are not illuminated.
The lighting in the instrument cluster, in the dis- plays and the controls in the vehicle interior can
be adjusted using the brightness control knob.
The brightness control knob is located on the
bottom left of the instrument cluster
(Y page 27).
X Turn the brightness control knob clockwise or
anti-clockwise.
If the light switch is set to the Ã,Tor
L position, the brightness is dependent
upon the brightness of the ambient light. READY indicator
When the drive system is started and the vehicle
is ready to drive, READY indicator :appears in
the multifunction display. This indicates that the vehicle is operational. Outside temperature display
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature.
The outside temperature display is in the multi-
function display (Y page 175).
There is a short delay before a change in outside
temperature appears in the multifunction dis-
play. 172
Displays and operationOn-board computer and displays

G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilises the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the follow-
ing situations:
R when using snow chains
R in deep snow
R on sand or gravel
For further information about ESP ®
, see
(Y page 65).
X Start the drive system.
X Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press 9or: to select ESP
ESP.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
ESP ®
is deactivated if the åwarning lamp
in the instrument cluster lights up continu-
ously when the drive system is running.
If the ÷ andå warning lamps light up
continuously, ESP ®
is not available due to a mal-
function.
Observe the information on warning lamps
(Y page 218).
Observe the information on display messages
(Y page 190).
Activating/deactivating COLLISION
PREVENTION ASSIST PLUS X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select Col‐
Col‐
lision Prevent. Assist
lision Prevent. Assist.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
When COLLISION PREVENTION ASSIST PLUS
is deactivated, the æsymbol appears in
the multifunction display in the assistance
graphic display.
For further information about COLLISION PRE-
VENTION ASSIST PLUS, see (Y page 62).Activating/deactivating ATTENTION
ASSIST X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Attention Assist
Attention Assist.
X Press ato confirm.
The current selection appears.
X Press ato confirm.
X Press the :or9 button to set Off Off,
Standard Standard orSensitive
Sensitive.
X Press the abutton to save the setting.
When ATTENTION ASSIST is deactivated, the
é symbol appears in the multifunction dis-
play in the assistance graphic display.
For further information about ATTENTION
ASSIST, see (Y page 165).
Activating/deactivating Blind Spot
Assist X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Blind Spot Assist
Blind Spot Assist.
X Press ato confirm.
The current selection appears.
X To activate/deactivate: pressaagain.
Further information about Blind Spot Assist
(Y page 169).
Activating/deactivating Lane Keeping
Assist X
Press the =or; button on the steering
wheel to select the Assist. Assist.menu.
X Press the 9or: button to select
Lane Keeping Assist
Lane Keeping Assist.
X Press ato confirm.
The current selection appears.
X Press aagain to confirm.
X Press the :or9 button to set Off
Off,
Standard
Standard orAdaptive
Adaptive.
X Press the abutton to save the setting.
When Lane Keeping Assist is activated, the
multifunction display shows the lane mark-
ings as bright lines in the assistance graphic.
For further information about Lane Keeping
Assist, see (Y page 170). Menus and submenus
183On-board computer and displays Z

Safety systems
Display messages
Possible causes/consequences and
M
MSolutions !÷
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ABS (Anti-lock Braking System), BAS (Brake Assist), ESP
®
(Electronic
Stability Program), the HOLD function, RBS (Recuperative Brake Sys-
tem), hill start assist and PRE-SAFE ®
are temporarily unavailable.
The adaptive brake lights and COLLISION PREVENTION ASSIST PLUS
may also have failed.
The !, ÷,åandJ warning lamps may also light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes:
R Self-diagnosis is not yet complete
R The on-board voltage may be insufficient.
G WARNING
The braking performance of the electric motor using recuperative
braking may be either reduced or not effective. If you do not make an
additional effort to apply the brake yourself, the braking effect may not be sufficient. If necessary, counteract the reduced regenerative brak-
ing effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected. The braking distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Carefully drive on a suitable stretch of road, making slight steering
movements, at a speed above 20 km/h.
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message:
X Drive on carefully.
X Consult a qualified specialist workshop immediately. !÷
inoperative inoperative See
SeeOwn‐
Own‐
er's Manual
er's Manual ABS, BAS, ESP
®
, the HOLD function, RBS, hill start assist and
PRE‑SAFE ®
are not available due to a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST PLUS
may also have failed.
The !, ÷,åandJ warning lamps may also light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The braking performance of the electric motor using recuperative
braking may be either reduced or not effective. If you do not make an
additional effort to apply the brake yourself, the braking effect may not 190
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions be sufficient. If necessary, counteract the reduced regenerative brak-
ing effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected.
The braking distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. ÷
currently unavaila‐ currently unavaila‐
ble ble
See
SeeOwner's
Owner's Man‐
Man‐
ual
ual ESP
®
, BAS, the HOLD function, RBS, hill start assist and PRE‑SAFE ®
are temporarily unavailable.
The adaptive brake lights and COLLISION PREVENTION ASSIST PLUS
may also have failed.
In addition, the ÷,åandJ warning lamps may light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function, for example, may not be complete.
G WARNING
The braking performance of the electric motor using recuperative
braking may be either reduced or not effective. If you do not make an
additional effort to apply the brake yourself, the braking effect may not be sufficient. If necessary, counteract the reduced regenerative brak-
ing effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Carefully drive on a suitable stretch of road, making slight steering
movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned above are available again.
If the multifunction display still shows the display message:
X Drive on carefully.
X Consult a qualified specialist workshop immediately. Display
messages
191On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions ÷
inoperative inoperative
See
SeeOwn‐
Own‐
er's Manual
er's Manual ESP
®
, BAS, the HOLD function, RBS, hill start assist and PRE‑SAFE ®
are not available due to a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST PLUS
may also have failed.
In addition, the ÷,åandJ warning lamps may light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
G WARNING
The braking performance of the electric motor using recuperative
braking may be either reduced or not effective. If you do not make an
additional effort to apply the brake yourself, the braking effect may not be sufficient. If necessary, counteract the reduced regenerative brak-
ing effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above.
The braking distance may thus increase in an emergency braking sit-
uation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. T!
÷
inoperative inoperative See
SeeOwn‐
Own‐
er's Manual
er's Manual EBD (electronic brake force distribution), ABS, BAS, ESP
®
, the HOLD
function, RBS, hill start assist and PRE-SAFE ®
are not available due to
a malfunction.
The adaptive brake lights and COLLISION PREVENTION ASSIST PLUS
may also have failed.
A warning tone sounds.
The ÷, å,!andJ warning lamps may also light up in the
instrument cluster.
G WARNING
The braking performance of the electric motor using recuperative
braking may be either reduced or not effective. If you do not make an
additional effort to apply the brake yourself, the braking effect may not be sufficient. If necessary, counteract the reduced regenerative brak-
ing effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore lock, for example, if you brake hard.
The steerability and braking characteristics may be severely affected.The braking distance may increase in an emergency braking situation.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
There is an increased danger of skidding and risk of an accident.
X Drive on carefully.
X Consult a qualified specialist workshop immediately. 192
Display
messagesOn-board computer and displays