2014 MERCEDES-BENZ B-CLASS SPORTS brake sensor

An intermittent warning tone will then sound
and the distance warning lamp will light up in
the instrument cluster .Brake immediatel yin
order to increase the distance to the vehicle
in front or take evasive action provided it is
safe to do so.
For DISTRONI CPLUStoa ssist you, the radar
sensor system must be operational.
DISTRONIC PLUS is automatically
deactivated if:
R you are driving slower than 15 mph
(25 km/h) and there is no longer avehicle
in front or
R the vehicle in front is no longer detected
If there is no vehicle in front,D ISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(30 km/h) and 120 mph (200 km/h) .Ifa
vehicle is driving in front of you, it operates in
the speed range between 0mph (0 km/h) and
120 mph (200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves,
it can resemble the radar detector softhe
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
question sare asked about this.
i This device complies with RSS-210 of
Industry Canada. Operation is subjec tto
the following two conditions:
1. This device ma ynot cause harmful
interference, and
2. thi sdevic emusta ccep tany interference
received, including interference tha tmay
caus eundesired operatio nofthe device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper 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. Important safety notes G
WARNING
DISTRONIC PLUS does not react to:
R people or animals
R stationary obstacles on the road, e.g.
stopped or parked vehicles
R oncominga nd crossing traffic
As aresult, DISTRONIC PLUS may neither give
warnings nor interveneins uch situations.
There is arisk of an accident.
Always pay careful attention to the traffic
situation and be ready to brake. G
WARNING
DISTRONIC PLUS cannot always clearly
identify other road users and complex traffic
situations.
In such cases, DISTRONIC PLUS may:
R give an unnecessary warning and then
brake the vehicle
R neither give awarning nor intervene
R accelerate unexpectedly
There is arisk of an accident.
Continue to drive carefully and be ready to
brake, in particular when warned to do so by
DISTRONIC PLUS. G
WARNING
DISTRONIC PLUS brakes your vehicle with up
to 40% of the maximum braking force. If this
braking force is insufficient, DISTRONIC PLUS
warns you visuallya nd audibly. There is arisk
of an accident.
In such cases, apply the brakes yourself and
try to take evasive action. Driving systems
163Driving and parking Z

!
If DISTRONIC PLUS or the HOLD function
is activated, the vehicle brakes
automaticallyinc ertain situations. To
prevent damage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or other similars ituations:
R when towin gthe vehicle
R in the car wash
If you fail to adapt your drivin gstyle,
DISTRONIC PLUS can neither reduc ethe risk
of accident nor override the laws of physics.
DISTRONIC PLUS cannot tak einto account
the road, traffic and weather conditions.
DISTRONI CPLUSiso nlyana id.Y ou are
responsibl efor the distance to the vehicl ein
front, for vehicl espeed ,for braking in good
time and for staying in your lane.
Do not use DISTRONIC PLUS:
R in road and traffic conditions which do not
allow you to maintain aconstant speed e.g.
in heavy traffic or on winding roads
R on slippery road surfaces. Brakin gor
accelerating could cause the drive wheels
to lose traction and the vehicle could then
skid
R when there is poor visibility, e.g. due to fog,
heavy rain or snow
DISTRONIC PLUS may not detect narrow
vehicles driving in front,e .g. motorcycles, or
vehicles driving on adifferent line.
In particular, the detection of obstacles can
be impaired if:
R dirt on the sensors or anything else
coverin gthe sensors
R snow or heavy rain
R interferenc ebyother radar sources
R strongr adar reflections, for example, in
parking garages
If DISTRONIC PLUS no longer detect sa
vehicle in front,D ISTRONIC PLUS may
unexpectedly accelerate the vehicle to the
stored speed. This speed may:
R
be too high if you are driving in afilter lane
or an exit lane
R be so high when driving in the right-hand
lane that you overtak evehicles in the left-
hand lane
R be so high when driving in the left-hand lane
that you overtak evehicles in the right-hand
lane
If there is achange of drivers, advise the new
driver of the speed stored.
Cruise control lever 001A
To store the current speed or ahigher
speed
0010 To store the current speed or alower
speed
0023 To deactivate DISTRONIC PLUS
0021 To store the current speed or calling up
the last stored speed
001E To set the specified minimum distance
Activating DISTRONIC PLUS Activation conditions
To activate DISTRONIC PLUS, all of the
following activation conditions must be
fulfilled:
R
the engine must be started. It may take up
to two minutes after pullinga way before
DISTRONIC PLUS is operational.
R the electric parking brake must be
released.
R ESP ®
must be active, but not intervening. 164
Driving systemsDriving and parking

Activating th
eHOLD function Example: vehicles wit
hacolor multifunction
display
X Mak esuret hatthe activation conditions
are met.
X Depress th ebrak epedal.
X Quickl ydepress th ebrak epedal further
until 001Aappear sinthemultifunction
display.
The HOLD function is activated. You can
release th ebrak epedal.
i If depressing th ebrak epedal th efirst
time does no tactivat ethe HOLD function,
wait briefly and then tr yagain.
Deactivating th eHOLD function The HOLD function is deactivated
automatically if:
R
you accelerate .Onvehicles with automatic
transmission :only when the transmission
is in position Dor R.
R the transmission is in position Pon vehicles
with automatic transmission.
R yo ud epress the brake peda lagain with a
ce rtain amoun tofpressure until 001A
disappears from the multifunction display.
R you secure the vehicl eusing the electric
parking brake.
R you activate DISTRONIC PLUS.
i After atime, the electric parking brake
secure sthe vehicl eand relieves the service
brake. The electric parking brake automatically
secure
sthe vehicl eifthe HOLD function is
activated and:
R the driver's door is open and the driver's
seat beltisu nfastened.
R the engine is switched off, unless it is
automaticallys witched off by the ECO
start/stop function.
R as ystem malfunction occurs.
R the power supplyisn ot sufficient.
If am alfunction occurs, then the transmission
may be shifted into position Pautomatically. PARKTRONIC
Important safety notes PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It monitors the area
around your vehicle using six sensors in the
front bumper and four sensors in the rear
bumper. PARKTRONIC indicates visually and
audibly the distance between your vehicle
and an object.
PARKTRONIC is only an aid. It is not a
replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting
aparking space. When
maneuvering, parking or pulling out of a
parking space, make sure that there are no
persons, animals or objects in the area in
which you are maneuvering.
! When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars.
PARKTRONIC does not detect such objects
when they are in the immediate vicinity of
the vehicle. You could damage the vehicle
or the objects.
The sensors may not detect snow and other
objects that absorb ultrasonic waves.
Ultrasonic sources such as an automatic
car wash, the compressed-air brakes on a 172
Driving systemsDriving and parking

truck or
apneumati cdrill coul dcause
PARKTRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain.
PARKTRONIC is activated automatically when
you:
R switch on the ignition
R shift the transmission to position D,Ror N
R release the electric parking brake
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h) .Itisreactivated at lower
speeds.
Range of the sensors General notes
PARKTRONIC does not take objects into
consideration that are:
R below the detection range, e.g. people,
animals or objects
R above the detection range, e.g.
overhanging loads, truck overhangs or
loading ramps. 001A
Sensors in the front bumper, left-hand
side (example) Side view Top view
The sensors must be free from dirt, ice or
slush. They can otherwise not function
correctly. Clean the sensors regularly, taking
care not to scratch or damage them
(Y
page2 89).
Fron tsensors Center Approx
.40in (approx.
100cm) Corners Approx. 24in (approx.
60cm)
Rea
rsensors Center Approx
.48in( approx.
12 0c m) Corners Approx
.32in (approx.
80 cm) Minimum distance
Center Approx. 8in (approx. 20cm)
Corners Approx. 8in (approx. 20cm)
If there is an obstacl
ewithin this range, the
relevant warning display slight up and a
warning tone sounds. If the distance falls
below the minimum ,the distance may no
longer be shown.
Warning displays The warning display
sshowt he distance
between the sensors and the obstacle. The
warning display for the front are aislocated Drivin
gsystems
173Drivingand parking Z

Display messages Possible causes/consequences and
000B Solutions
PRE-SAFE
Functions
Currently Limited
See Owner'
sManual Adaptive Brake Assis
tistemporarily inoperative. Possible causes
are:
R the front bumper is dirty.
R 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
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
When the causes stated above no longer apply,t he display
message disappears.
Adaptive Brake Assist is operational again.
If the displaym essage does not disappear:
X Pull over and stop the vehicle safely as soon as possible,p aying
attention to road and traffic conditions.
X Secure the vehicle against rolling away( Ypage 152).
X Cleant he front bumper (Y page 289).
X Restart the engine. PRE-SAFE
Functions Limited
See Operator's
Manual Adaptive Brake Assist is faulty. The distance warning signal may
also have failed.
X
Visit aqualified specialist workshop. 0021
SRS Malfunction
Service Required There is
amalfunction in the SRS (Supplemental Restraint
System). The 0021warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or EmergencyT ensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit aqualified specialist workshop.
Further information on occupant safety (Y page 40).216
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
000B Solutions
DISTRONIC PLUS
Currently
Unavailable See
Operator'
sManual DISTRONIC PLU
Sistemporarily inoperative. Possible causes are:
R 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
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
Aw arning tone also sounds.
When th ecauses state dabov enol onger apply, th edisplay
message disappears.
DISTRONI Cisoperational again.
If th edisplay message does no tdisappear:
X Pull over and stop the vehicle safely as soon as possible ,paying
attention to road and traffic conditions.
X Secure the vehicle against rollin gaway (Y page 152).
X Clean the sensors in the radiator trim (Y page 289).
X Restar tthe engine. DISTRONIC PLUS
Inoperative DISTRONIC PLUS is defective. Adaptive Brake Assist may also
have failed.
Aw
arning tone also sounds.
X Visi taq ualified specialist workshop. DISTRONIC PLUS
Passive You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
X
Remove your foot from the accelerator pedal. DISTRONIC PLUS
---m
ph An activation condition for DISTRONIC PLUS is not fulfilled.
X
Check the activation condition sfor DISTRONIC PLUS
(Y page 164). Display messages
229On-boardcomputer and displays Z

Display messages Possible causes/consequences and
000B Solutions
Tir
eP ress. Monito
rCurrently Unavailable Due to
asource of radi ointerference ,nosignals can be received
from the whee lsensors .The tire pressure monitor is temporarily
malfunctioning.
X Drive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved. TirePress.
Sensor(s) Missing There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.
X
Have the faulty tire pressure sensor replaced at aqualified
specialist workshop. Tire Pressure
Monitor
Inoperative No
Wheel Sensors The wheels mounted do not have
asuitable tire pressure sensor.
The tire pressure monitor is deactivated.
X Mount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
for afew minutes. Tire Press.
Monitor
Inoperative The tire pressure monitor is faulty.
X
Visit aqualified specialist workshop. Vehicle
Display messages Possible causes/consequencesa
nd000B Solutions
Shift to 'P' or 'N'
to Start Engine You have attempted to start the engine with the transmission in
position
Ror D.
X Shift the transmission to position Por N. Auxiliary Battery
Malfunction The auxiliary battery for the automatic transmission is no longer
being charged.
X
Visit aqualified specialist workshop at the next opportunity.
X Until then, set the automatic transmission to position Pbefore
you switch off the engine.
X Before leaving the vehicle, apply the electric parking brake. Depress Brake to
Start Engine You have attempted to start the engine with the transmission in
position
Nwithout depressing the brake pedal.
X Depress the brake pedal. Display messages
233On-board computer and displays Z