warning MERCEDES-BENZ B-Class 2017 W246 Owner's Manual

0043
Yellow guide line for the vehicle width
including the exterior mirrors, for current
steering wheel angle (dynamic)
X Stop the vehicle when it is almost exactly in
front of the parking space.
The white lane should be as close to parallel
with the parking space marking as possible. 0043
White guide line at current steering wheel
angle
0044 Parking space marking
X Turn the steering wheel to the center position
while the vehicle is stationary. 0043
Red guide line at a distance of approximately
12 in (0.30 m) from the rear of the vehicle
0044 White guide line without turning the steering
wheel
0087 End of parking space
X Back up carefully until you have reached the
final position.
Red guide line 0043is then at end of parking
space 0087. The vehicle is almost parallel in the
parking space.
Wide-angle function 0043
Symbol for the wide-angle view function
0044 Own vehicle
0087 Parking Assist PARKTRONIC warning dis-
plays
Select this view when you are driving out of an
exit and the view of crossing traffic is restricted, for example. ATTENTION ASSIST
General notes ATTENTION ASSIST helps you during long,
monotonous journeys, such as on highways. It is
active in the 37 mph (60 km/h) to 125 mph 148
Driving systemsDriving and parking

(200 km/h) range. If ATTENTION ASSIST
detects typical indicators of fatigue or increas-
ing lapses in concentration on the part of the
driver, it suggests taking a break.
Important safety notes ATTENTION ASSIST is only an aid to the driver. It
might not always recognize fatigue or increasing inattentiveness in time or fail to recognize them
at all. The system is not a substitute for a well-
rested and attentive driver.
The functionality of ATTENTION ASSIST is
restricted and warnings may be delayed or not
occur at all:
R if the length of the journey is less than approx-
imately 30 minutes
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 accel-
eration
R if you are predominantly driving slower than
37 mph (60 km/h) or faster than 125 mph
(200 km/ h)
R if the time has been set incorrectly
R in active driving situations, such as when you
change lanes or change your speed
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 driv-
er's door, e.g. for a change of drivers or to
take a break
Displaying the attention level You can have current status information dis-
played in the assistance menu (Y
page 162) of
the on-board computer.
X Select the Assistance display for Attention
Assist using the on-board computer
(Y page 162).
The following information is displayed: R Length of the journey since the last break.
R The Attention Attention Level
Leveldetermined by ATTEN-
TION ASSIST, displayed in a bar display in five levels from high to low
R If ATTENTION ASSIST is unable to calculate
the attention level and cannot output a warn-
ing, the System Passive System Passive message appears.
The bar display then changes the display,
such as when you are driving at a speed below 37 mph (60 km/h) or above 124 mph
(200 km/h).
Activating ATTENTION ASSIST X
Activate ATTENTION ASSIST using the on-
board computer (Y page 163).
The system determines the attention level of
the driver depending on the setting selected:
Standard Standard selected: the sensitivity with which
the system determines the attention level is set to normal.
Sensitive
Sensitive selected: the sensitivity is set
higher. The attention level detected by Attention
Assist is adapted accordingly and the driver is
warned earlier.
When ATTENTION ASSIST is deactivated, the
00D7 symbol appears in the multifunction dis-
play in the assistance graphic display.
When ATTENTION ASSIST has been deactivated,
it is automatically reactivated after the engine
has been stopped. The sensitivity selected cor-
responds to the last selection activated (stand-
ard/sensitive).
Warning in the multifunction display If fatigue or increasing lapses in concentration
are detected, a warning appears in the multi-
function display:
ATTENTION ASSIST ATTENTION ASSIST Take a
Take a
Break!
Break!.
In addition to the message shown in the multi-
function display, you will then hear a warning
tone. Driving systems
149Driving and parking Z

X
If necessary, take a break.
X Confirm the message by pressing the 0076
button on the steering wheel.
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. This will only happen if ATTEN-
TION ASSIST still detects typical indicators of
fatigue or increasing lapses in concentration.
Vehicles with the COMAND multimedia sys-
tem: if a warning is output in the multifunction
display, a service station search is performed in the multimedia system. You can select a servicestation and navigation to this service station will
then begin. This function can be activated or
deactivated in the multimedia system; see the
Digital Operator's Manual. Blind Spot Assist
General notes Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sen-
sors. A warning display in the exterior mirrors
draws your attention to vehicles detected in the
monitored area. If you then switch on the cor-
responding turn signal to change lane, you will
also receive an optical and audible warning.
Blind Spot Assist supports you from a speed of
approximately 20 mph (30 km/h).
Important safety notes G
WARNING
Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance. Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is
sufficient distance to the side for other road
users and obstacles.
i USA only:
This device has been approved by the FCC as a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removing, tampering with, or
altering the device will void any warranties,
and is not permitted by the FCC. Do not tam-
per with, alter, or use in any non-approved
way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
Radar sensors The radar sensors for Blind Spot Assist are inte-
grated into the rear bumper. Make sure that the
bumpers are free from dirt, ice or slush. The
sensors must not be covered, for example by
cycle racks or overhanging loads. 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.
Blind Spot Assist may no longer work properly.
Monitoring range of the sensors In particular, the detection of obstacles can be
impaired if:
R there is dirt on the sensors or anything else
covering the sensors
R there is poor visibility, e.g. due to fog, heavy
rain or snow
R a narrow vehicle traveling in front, e.g. a
motorbike or bicycle
R the road has very wide lanes
R the road has narrow lanes
R you are not driving in the middle of the lane
R there are barriers or other road boundaries
Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors the area up to 10 ft
(3 m) behind your vehicle and directly next to it.
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 150
Driving systemsDriving and parking

case if the vehicles are driving on the inner side
of their 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 0043
Warning display
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 Blind Spot Assist is activated, indicator
lamp 0043in the exterior mirrors lights up yellow
at speeds of up to 20 mph (30 km/h). At speeds
above 20 mph (30 km/h), the indicator lamp
goes out and Blind Spot Assist is operational.
If a vehicle is detected within the blind spot
monitoring range at speeds above 20 mph
(30 km/h), warning lamp 0043on 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).
The yellow indicator lamp goes out if reverse
gear is engaged. In this event, Blind Spot Assist is no longer active.
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 0043flashes. If the turn
signal remains on, vehicles detected are indica-
ted by the flashing of red warning lamp 0043.
There are no further warning tones.
Switching on Blind Spot Assist X
Make sure that Blind Spot Assist is activated
in the on-board computer (Y page 163).
X Turn the SmartKey to position 2in the ignition
lock.
Warning lamps 0043in the exterior mirrors light
up red for approximately 1.5 seconds and
then turn yellow. Driving systems
151Driving and parking Z

Important safety notes
G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi- cle while driving, you will be distracted from
traffic conditions. You could also lose control of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle 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 recognize function
restrictions in systems 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, pull over as soon as it is safe to do so. Contact a qualified specialist workshop.
For an overview, see the instrument panel illus-
tration (Y page 32). 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 32).
X Turn the brightness control knob clockwise or
counter-clockwise.
If the light switch is set to the 0058,0060or
0058 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 0043appears 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 temperature measured and
does not record the road temperature.
The outside temperature display is in the multi-
function display (Y page 155).
There is a short delay before a change in outside
temperature appears in the multifunction dis-
play. E-CELL display
G
WARNING
There is a risk of an accident if you accelerate or overtake when the power output of the
drive system is reduced.
You should therefore adapt your driving style
and drive particularly carefully. Charge the
high-voltage battery at a charge station imme- diately. 152
Displays and operationOn-board computer and displays

Audio menu
Selecting a radio station 0043
Active station list
0044 Station frequency with memory position
The multifunction display shows station 0044with
station frequency or station name. The preset
position is only displayed along with station 0044if
this has been stored.
X Switch on the multimedia system and select
Radio (see the separate operating instruc-
tions).
X Press the 0059or0065 button on the steering
wheel to select the Audio
Audio menu.
X To select a preset list or station list: press
and briefly hold the 0063or0064 button until
the preset list or station list in the desired
frequency range is shown.
X To select a station: briefly press0063
or 0064.
i SIRIUS XM satellite radio functions like a
normal radio.
You can find further information on operation in the "Satellite radio" section of the separate
multimedia system operating instructions.
Operating an audio player or audio
media 0043
Current title Audio data from various audio devices or media
can be played, depending on the equipment
installed in the vehicle.
X Switch on the multimedia system and then
audio CD or MP3 mode (see the separate
operating instructions).
X Press the 0059or0065 button on the steering
wheel to select the Audio Audiomenu.
X To select the next/previous track: briefly
press the 0063or0064 button.
X To select a track from the track list (rapid
scrolling): press and hold the 0063or0064
button until desired track appears.
If you press and hold 0063or0064, the rapid
scrolling speed is increased. Not all audio
drives or data carriers support this function.
If track information is stored on the audio device or medium, the multifunction display will show
the number and title of the track.
Video DVD operation You can only operate DVD videos in the
Audio Audio
menu in vehicles with COMAND.
X Switch on COMAND and select video DVD
(see the separate operating instructions).
X Press the 0059or0065 button on the steering
wheel to select the Audio
Audiomenu.
X To select the next or previous scene:
briefly press the
0063or0064 button.
X To select a scene from the scene list
(rapid scrolling): press and hold the 0063
or 0064 button until desired scene 0043
appears. Telephone menu
Introduction G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi- 160
Menus and sub
menusOn-board computer and displays

Assistance menu
Introduction Depending on the equipment installed in the
vehicle, you have the following options in the
DriveAssist
DriveAssist menu:
R Displaying the assistance graphic
(Y page 162)
R Deactivating/activating ESP ®
(Y page 162)
R Activating/deactivating Active Brake Assist
(Y page 162)
R Activating/deactivating ATTENTION ASSIST
(Y page 163)
R Activating/deactivating Blind Spot Assist
(Y page 163)
Displaying the assistance graphic X
Press the 0059or0065 button on the steering
wheel to select the DriveAssist
DriveAssist menu.
X Press 0063or0064 to select Assistance Assistance
Graphic
Graphic.
X Press 0076to confirm.
The assistance graphic displays the status of
and information from the following driving
systems or driving safety systems:
R Active Brake Assist (Y page 60)
R ATTENTION ASSIST (Y page 148)
R Rear window wiper (Y page 95)
X Press 0064to display the ATTENTION ASSIST
assessment.
Deactivating/activating ESP ®Observe the important safety notes on ESP
®
(Y page 62). G
WARNING
If you deactivate ESP ®
, ESP ®
no longer sta-
bilizes 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 62).
X Start the drive system.
X Press the 0059or0065 button on the steering
wheel to select the DriveAssist DriveAssistmenu.
X Press 0063or0064 to select ESP
ESP .
X Press 0076to confirm.
The current selection appears.
X To activate/deactivate: press the0076but-
ton again.
ESP ®
is deactivated if the 00BBwarning lamp
in the instrument cluster lights up continu-
ously when the drive system is running.
If the 00E5 and00BB warning lamps light up
continuously, ESP ®
is not available due to a mal-
function.
Observe the information on warning lamps
(Y page 195).
Observe the information on display messages
(Y page 168).
Activating or deactivating Active Brake
Assist X
Press the 0059or0065 button on the steering
wheel to select the DriveAssist DriveAssistmenu.
X Press the 0063or0064 button to select
Brake Assist Brake Assist .
X Press 0076to confirm.
The current selection appears.
X To activate/deactivate: press the0076but-
ton again.
When Active Brake Assist is deactivated, the
00D4 symbol appears in the multifunction dis-
play in the assistance graphic display.
Further information on Active Brake Assist
(Y page 60). 162
Menus and sub
menusOn-board computer and displays

Display messages
Introduction
General notes Display messages appear in the multifunction display.
Display messages with graphic displays may be shown in simplified form in the Operator's Manual
and may therefore differ from the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in this
Operator's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
When the ignition is switched off, all display messages are deleted, apart from some high-priority
display messages. Once the causes of the high-priority display messages have been rectified, the
corresponding display messages are also deleted.
When you stop and park the vehicle, please observe the notes on:
R HOLD function (Y page 138)
R Parking (Y page 128)
Hiding display messages X
Press the 0076or0038 button on the steering wheel.
The multifunction display hides the display message.
The multifunction display shows high-priority display messages in red. Some high-priority display
messages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the messages
have been remedied.
Message memory The on-board computer saves certain display messages in the
message memory. You can call up
the display messages:
X Press the 0059or0065 button on the steering wheel to select the Serv.
Serv. menu.
If there are display messages, the multifunction display shows 2 Messages
2 Messages, for example.
X Press the 0063or0064 button to select the entry, e.g. 2 Messages
2 Messages.
X Press 0076to confirm.
X Press the 0063or0064 button to scroll through the display messages. Display
messages
167On-board computer and displays Z

Safety systems
Display messages
Possible causes/consequences and
0050
0050Solutions 002500E5
Currently Unavaila‐
Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual ABS (Anti-lock Braking System), BAS (Brake Assist), ESP
®
(Electronic
Stability Program), the HOLD function, RBS (Recuperative Brake Sys- tem) and hill start assist are temporarily unavailable.
Active Brake Assist may have also failed.
The 0025, 00E5,00BBand00C6 (USA only) or 004D(Canada only)
warning lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
Possible causes are:
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 in an emergency braking situation can increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a short distance on a suitable stretch of road, making
slight steering movements at a speed above 12 mph (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 Visit a qualified specialist workshop immediately. 002500E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual ABS, BAS, ESP
®
, the HOLD function, RBS and hill start assist are not
available due to a malfunction.
Active Brake Assist may have also failed.
The 0025, 00E5,00BB,00C6(USA only) or 004D(Canada only) and
0027 (USA only) or 004D(Canada only) warning lamps in the instru-
ment cluster may also light up.
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. 168
Display messagesOn-board computer and displays

Display messages
Possible causes/consequences and
0050
0050Solutions 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 in an emergency braking situation can increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 00E5
Currently Unavaila‐ Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual ESP
®
, BAS, the HOLD function, RBS and hill start assist are tempora-
rily unavailable.
Active Brake Assist may have also failed.
The , 00E5, 00BBand00C6 (USA only) or 004D(Canada only) warning
lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
The self-diagnosis function might not be complete, for example.
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 in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (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 Visit a qualified specialist workshop immediately. Display messages
169On-board computer and displays Z