2012 MERCEDES-BENZ A CLASS radio

Blind Spot Assist is only an aid. It may fail to
detect
some vehicles and is no substitute for
attentive driving.
General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from speeds of
30 km/h. A warning display in the exterior
mirrors draws your attention to vehicles
detected in the monitored area. If you then
switch on the corresponding turn signal to
change lane, you will also receive an optical
and audible collision warning. For this pur-
pose, Blind Spot Assist uses sensors in the
rear bumper.
The radar sensor system is switched off auto-
matically in the vicinity of radio telescope
facilities ( Y page 350).
For Blind Spot Assist to assist you when driv-
ing, the radar sensor system must be:
R activated(Y page 223)
R operational
i In some countries you must deactivate
the radar sensor system ( Y page 223).
For further information about the radar sen-
sor system; see ( Y page 350).
Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired in the case of:
R dirt on the sensors or anything else cover-
ing the sensors
R poor visibility, e.g. due to fog, heavy rain or
snow
R a narrow vehicle travelling in front, e.g. a
motorcycle or a bicycle
R very wide lanes
R narrow lanes
R vehicles not driving in the middle of their
lane
R barriers or other road boundaries
Vehicles in the monitoring range are then not
indicated. Blind Spot Assist monitors the area up to
3.0

m behind your vehicle and directly next to
your vehicle, as shown in the diagram. For this
purpose, Blind Spot Assist uses radar sensors
in the rear bumper.
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
driving in the middle of their lane. This may
be the 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 driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside particularly long vehicles, for
example lorries, for a prolonged time.
The two sensors for Blind Spot Assist are
integrated into the sides of the rear bumper.
Make sure that the bumper is free of dirt, ice
or slush in the vicinity of the sensors. The
radar sensors must not be covered, for exam-
ple by cycle racks or overhanging loads. Fol-
lowing a severe impact or in the event of dam-
age to the bumpers, have the function of the
radar sensors checked at a qualified special-
ist workshop. Blind Spot Assist may other-
wise not work properly. 198
Driving systems
Driving and parking

approach the point of the announced change
of direction.
Change of direction announced with a
lane recommendation
Example: change of direction announced with lane
recommendation (colour multifunction display)
:
Road to which the change of direction
leads
; Distance to change of direction and visual
distance display
= New lane during a change of direction
? Lane continues through change of direc-
tion
A Lane recommendation
B Change-of-direction symbol
On multilane roads, the system can display a
new lane recommendation = 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 available on the digital
map.
Other status indicators of the naviga-
tion system R
O: you have reached the destination or an
intermediate destination.
R New route... or Calculating route:
calculating a new route
R Off map or Off road : the vehicle position
is outside the area of the digital map (off-
map position).
R No route : no route could be calculated to
the selected destination. Audio menu
Selecting a radio station :
Waveband
; Station frequency with memory position
i The memory position is only displayed
along with station ; if this has been
stored.
X Switch on the audio system or COMAND
Online and select Radio; see the separate
operating instructions.
X Press the =
or ; button on the steer-
ing wheel to select the Audio menu.
X To select a stored station: 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 station list is received:
X To select a station 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 ( Digital Audio Broadcast-
ing); see the separate operating instruc-
tions. 214
Menus and submenus
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsPRE-SAFE
Functions cur‐
rently
limited See
Owner's Manual Adaptive Brake Assist is temporarily inoperative. Possible causes:
R
the radar sensor cover in the radiator trim is dirty.
R the function is impaired due to heavy rain or snow.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R AMG vehicles: ESP ®
is deactivated.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Once
the causes listed above no longer apply, the display message
goes out.
Adaptive Brake Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 162).
X Clean the radar sensor cover in the radiator grille
(Y page 294).
X Restart the engine.
X AMG vehicles: reactivate ESP ®
(Y page 66). PRE-SAFE
Functions limited
See Owner's Manual Adaptive Brake Assist is faulty. The distance warning signal may
also have failed.
X
Visit a qualified specialist workshop. ü If the symbol appears in the multifunction display, a seat belt
tongue has been inserted into a rear seat belt buckle.
Further

information on the status indicator for the rear seat belts
(Y page 49). ý If the symbol appears in the multifunction display, a seat belt
tongue has not been inserted in a rear seat belt buckle.
G WARNING
A seat belt which is not worn correctly, or which has not been
engaged in the seat belt buckle correctly, cannot provide the
intended level of protection.
This poses an increased risk of injury.
X If necessary, ask the occupants in the rear to fasten their seat
belts ( Y page 47).
Further information on the status indicator for the rear seat belts
(Y page 49). Display messages
237
On-board computer and displays Z

Display messages Possible causes/consequences and
M SolutionsSpeed Limit Assist
Currently unavail‐
able See Owner's
Manual Speed Limit Assist is deactivated and temporarily inoperative.
Possible causes:
R
the windscreen is dirty in the camera's field of vision.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windscreen.
If the system detects that the camera is fully operational, the dis-
play message disappears.
Speed Limit Assist is operational again. Speed Limit Assist:
Unavailable in
this country Speed Limit Assist is only available in certain countries.
X
Drive on.
Speed
Limit Assist is available again as soon as you drive into a
country in which its use is approved. Speed Limit Assist
inoperative Speed Limit Assist is faulty.
X
Visit a qualified specialist workshop. ë
Off The HOLD function is deactivated. the vehicle is skidding.
A warning tone also sounds.
X
Reactivate the HOLD function later (Y page 179). The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
X
Check the activation conditions for the HOLD function
(Y page 179). Radar sensor deac‐
tivated See Own‐
er's Manual The radar sensor system is deactivated.
X
Check whether or not the radar sensor system may be activated
(Y page 350).
X Switch on the radar sensor system (Y page 223). Radar sensor deac‐
tivated

autom. See
Owner's Manual Vehicles with a navigation system: the vehicle is close to a radio
telescope
facility and is therefore prohibited from transmitting any
radar signals. The radar sensor system is deactivated automati-
cally.
If Blind Spot Assist was activated, it is no longer available. The
yellow 9 indicator lamps also light up in the exterior mirrors.
X Drive on.
Blind

Spot Assist is available again as soon as the vehicle is far
enough away from the radio telescope facility ( Y page 350).246
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsBlind Spot Assist is temporarily inoperative. Possible causes:
R
the sensors are dirty.
R the function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
The yellow 9 indicator lamps also light up in the exterior mir-
rors.
Once
the causes listed above no longer apply, the display message
goes out.
Blind Spot Assist is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 162).
X Clean the sensors ( Y page 294).
X Restart the engine. Blind Spot Assist
inoperative Blind Spot Assist is faulty.
The yellow
9 indicator lamps also light up in the exterior mir-
rors.
X Visit a qualified specialist workshop. Park Assist cancel‐
led The driver's door is open and the driver's seat belt has not been
fastened.
X
Repeat the parking process with the seat belt fastened and the
driver's door closed. You inadvertently touched the multifunction steering wheel while
steering intervention was active.
X
While steering intervention is active, make sure not to touch the
multifunction steering wheel. The vehicle has started to skid and ESP
®
has intervened.
X Use Active Parking Assist again later (Y page 186).248
Display messages
On-board computer and displays

Display messages Possible causes/consequences and
M SolutionsPark Assist inoper‐
ative You have just carried out a large number of turning or parking
manoeuvres.
Active Parking Assist will become available again after approx-
imately ten minutes (
Y page 186).
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Switch off and restart the engine.
If the display message continues to be displayed:
X Visit a qualified specialist workshop. PARKTRONIC is faulty.
X
Visit a qualified specialist workshop. DISTRONIC PLUS off DISTRONIC PLUS has been deactivated (
Y page 173). If it was
deactivated automatically, a warning tone also sounds. DISTRONIC PLUS
available again DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS
(Y page 173).
DISTRONIC PLUS cur‐
rently
unavailable
See Owner's Manual DISTRONIC PLUS is temporarily inoperative. Possible causes:
R
the function is impaired due to heavy rain or snow.
R the sensors in the radiator trim are dirty
R the radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
A warning tone also sounds.
Once
the causes listed above no longer apply, the display message
goes out.
DISTRONIC is operational again.
If the display message does not disappear:
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Y page 162).
X Clean the sensors in the radiator trim (Y page 294).
X Restart the engine. Display messages
249
On-board computer and displays Z

sion surrounding the possible health risk
posed by electromagnetic fields.
Mercedes-Benz recommends the use of an
approved exterior aerial. This ensures:
R
optimal mobile phone reception quality in
the vehicle
R mutual influences between the vehicle
electronics and mobile phones are mini-
mised
An exterior aerial has the following advan-
tages:
R it
conducts the electromagnetic fields gen-
erated by a wireless device to the exterior.
R the field strength in the vehicle interior is
lower than in a vehicle that does not have
an exterior aerial.
Information on retrofitting two-way radios
and mobile phones (RF transmitters)
(Y page 336).
General notes There are various mobile phone brackets that
may be fitted in your vehicle; in some cases,
these are country-specific.
You can connect a Bluetooth
®
-capable
mobile phone with Audio 20 or COMAND
Online

via the Bluetooth ®
interface. This also
applies if your vehicle is equipped with con-
venience telephony.
More information on suitable mobile phones,
mobile phone brackets and on connecting
Bluetooth ®
-capable mobile phones with
Audio 20 or COMAND Online can be obtained:
R at your Mercedes-Benz Service Centre
R on the Internet at http://www.mercedes-
benz.com/connect
i The functions and services available when
you use the phone depend on your mobile
phone model and service provider. Using a mobile phone If the mobile phone is inserted in the mobile
phone bracket, you can speak to the person
you are calling using the hands-free system.
X
Open the telephone compartment
(Y page 270).
X Place the mobile phone bracket into the
pre-installed fitting (see the separate
installation instructions for the mobile
phone fitting).
X Insert the mobile phone into the mobile
phone bracket (see the separate installa-
tion instructions for the mobile phone fit-
ting).
i On
some mobile phone brackets, first you
have to connect the phone to the mobile
phone bracket via Bluetooth ®
(see the sep-
arate operating instructions for the mobile
phone bracket).
If this is the case, the mobile phone does
not have to be inserted into the bracket for
you to be able to use the telephone func-
tions. However, the charging function and
aerial function are not available.
Operating the mobile phone You can operate the telephone using the
6 and ~ buttons on the multifunction
steering

wheel. You can operate other mobile
phone functions via the on-board computer
(Y page 215).
When you remove the key from the ignition
lock, the mobile phone stays switched on.
However, you can no longer use the hands-
free system.
If you have an active call and would like to
take the key out of the ignition lock, first
remove the mobile phone from the bracket.
i If you use a mobile phone bracket which
is connected to your mobile via Blue-
tooth ®
and you wish to continue a call on
your mobile phone:
You should switch the call to "Private
mode" before you remove the key from the 280
Features
Stowing and features

ignition lock. Otherwise, it will take up to
20 seconds for the mobile phone to dis-
connect from the system. Only then can
you
continue the call on your mobile phone.
Notes on the necessary steps for setting
"Private mode" can be found in the sepa-
rate operating instructions of the mobile
phone.
i Not all mobile phones support "Private
mode".
Mobile phone bracket in the stowage
space You can fold the pre-installed bracket up to
improve access to the stowage space
beneath

it. Depending on the vehicle's equip-
ment, a USB connection and an AUX-IN con-
nection/Media Interface are fitted in the
stowage compartment ( Y page 270).X
To fold the bracket up: press button :.
X To fold the bracket down: press the
bracket down and allow it to engage. Floormat on the driver's side
G
WARNING
Objects in the driver's footwell can restrict the
pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle
is jeopardised. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Fit the floormats securely and as specified in order to ensure
sufficient

clearance for the pedals. Do not use
loose floormats. X
Slide the seat backwards.
X To fit: lay the floormat in the footwell.
X Press safety catch knobs : onto retain-
ers ;.
X To remove: pull the floormat away from
retainers ;.
X Remove the floormats. Retrofitted anti-glare film
Retrofitted
anti-glare film on the inside of the
windows can interfere with radio/mobile
telephone reception. This is particularly the
case for conductive or metallic-coated films.
You can obtain information about anti-glare
film from a qualified specialist workshop. Features
281
Stowing and features Z