2016 MERCEDES-BENZ B-Class ELECTRIC sensor

Display messagesPossible causes/consequences andMSolutions
#
Check Brake Pad
Wear
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
G
Inoperative
One or more main features of the mbrace system are malfunc-
tioning.
XVisit a qualified specialist workshop.
Collision Preven‐
tion Assist Plus
Currently Unavail‐
able See Opera‐
tor's Manual
COLLISION PREVENTION ASSIST PLUS is temporarily not opera-
tional.
Possible causes are:
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tion s or other sources of electromagnetic radiation.
Rthe system is outside the operating temperature range.
Rthe on-board voltage is too low.
When the causes stated above no longer apply, the display mes-
sage disappears.
COLLISION PREVENTION ASSIST PLUS is operational again.
If th e display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecur eth e vehicle against rolling away (Ypage 153).
XStart th e drive system again.
Collision Preven‐
tion Assist Plus
Inoperative
COLLISION PREVENTION ASSIST PLUS is temporarily inoperative
due to a malfunction. Adaptive Brake Assist may also have failed.
XVisit a qualified specialist workshop immediately.
Display messages20 9
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Radar Sensors
Dirty See Opera‐
tor's Manual
COLLISION PREVENTION ASSIST PLUS is temporarily restricted or
inoperative.
Possible causes are:
Rthe sensors in the radiator trim and/or in the bumpers are dirty
Rthe function of COLLISION PREVENTION ASSIST PLUS is
impaired due to heavy rain or snow.
A warning tone also sounds.
When the causes stated above no longer apply, the display mes-
sage disappears. COLLISION PREVENTION ASSIST PLUS is opera-
tional again.
If th e display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecur eth e vehicle against rolling away (Ypage 153).
XSwitc h offthe drive system.
XClean the sensors in the following location s(Ypage 277):
Rin the radiatortrim
Rin thefront bumper
Rin the rear bumper, particularly in the middle of the rear
bumper
XStart th e drive system again.
The display message disappears.
ã
Acoustic Vehicle
Indication Inoper‐
ative
The sound generator is not working. The vehicle can still be driven;
however, no vehicle sounds can be generated. As a result, your
vehicle may not be heard by other road users until it is very close
to them, or it may not be heard at all.
XDrive with particular care, allowing for the possibility that other
road users may behave unpredictably.
XVisit a qualified specialist workshop.
6
SRS Malfunction
Service Required
The restraint system is faulty. The 6warning lamp also lights
up in the instrument cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig-
gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
XVisit a qualified specialist workshop immediately.
Fo r further information about the restraint system, see
(
Ypage 40).
210Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
b
Active Headlamps
Inoperative
The active light function is faulty.
XVisit a qualified specialist workshop.
b
Malfunction See
Operator's Manual
The exterior lighting is defective.
XVisit a qualified specialist workshop.
b
AutoLampFunction
Inoperative
The light sensor is defective.
XVisit a qualified specialist workshop.
b
Switch Off Lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
XTurn the light switch to the Ãposition.
b
SwitchOnHeadlamps
You are driving with low-beam headlamps switched off.
XTurnthe light switch to the Lorà position.
Display messages217
On-board computer and displays
Z

Driving systems
Display messagesPossible causes/consequences andMSolutions
À
Attention Assist:
TakeaBreak!
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver .Awarningtone
also sounds.
XIf necessary, take a break.
Durin g long journeys, take regular breaks in good time so you get
enough rest.
À
Attention Assist
Inoperative
ATTENTION ASSIST is inoperative.
XVisit a qualified specialist workshop.
ë
Off
The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
XReactivate the HOLD function later (Ypage 163).
The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
XCheck the activation conditions forth eHOLD function
(
Ypage 163).
Blind Spot Assist
Currently Unavail‐
able See Opera‐
tor's Manual
Blin d Spot Assist is temporarily inoperative.
Possible causes are:
Rth e radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio sta-
tion s or other sources of electromagnetic radiation.
Rthe radar sensor system is outside the operating temperature
range.
The yellow 9indicator lamps also light up in the exterior mir-
rors .
When the causes stated above no longer apply, the display mes-
sage disappears.
Blin d Spot Assist is operational again.
If th e display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecur eth e vehicle against rolling away (Ypage 153).
XStart th e drive system again.
220Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Warning Tire Mal‐
function
The tire pressure in one or more tires has dropped suddenly. The
wheel position appears in the multifunction display.
GWARNING
Driving withaflat tire poses a risk of the following hazards:
Raflat tire affects th e ability to steer or brake the vehicle.
Ryou could lose control of the vehicle.
Rcontinued driving withaflat tire will cause excessive heat build-
up and possibl yafire.
There is a risk of an accident.
XStop th e vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.
XSecur eth e vehicle against rolling away (Ypage 153).
XCheck thetires and , if necessary, follow the instructions fora
flat tire (
Ypage 282).
Tire Press. Moni‐
tor Currently
Unavailable
Because there is interferenc efrom a strong source of radio waves,
no signals from the tire pressure sensors are detected. The tire
pressure monitor is temporarily malfunctioning.
XDrive on.
The tire pressure monitor restarts automatically as soon as the
problem has been resolved.
TirePress. Sen‐
sor(s) Missing
There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire does not appear in the
multifunction display.
XHave the faulty tire pressure sensor replaced at a qualified spe-
cialist workshop.
Tire Pressure Mon‐
itor Inoperative
No Wheel Sensors
The wheels mounted do not haveasuitable tire pressure sensor.
The tire pressure monitor is deactivated.
XMount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
fo rafew minutes.
Tire Press. Moni‐
tor Inoperative
The tire pressure monitor is faulty.
XVisit a qualified specialist workshop.
224Display messages
On-board computer and displays

ces prevent water from draining away. This
can lead to corrosion damage and damage
to electronic components.
XClean the inside and outside of the win-
dows with a damp cloth and a cleaning
product that is recommended and
approved by Mercedes-Benz.
Cleaning wiper blades
GWARNING
You could become trapped by the windshield wipers if they start moving while cleaning the
windshield or wiper blades. There is a risk of
injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield or
wiper blades.
!Only fold the windshield wipers away from
the windshield when vertical. Otherwise,
you will damage the hood.
!Do not pull the wiper blade. Otherwise,
the wiper blade could be damaged.
!Do not clean wiper blades too often and
do not rub them too hard. Otherwise, the
graphite coating could be damaged. This
could cause wiper noise.
!Hold the wiper arm securely when folding
back. The windshield could be damaged if
the wiper arm smacks against it suddenly.
XFold the windshield wiper arms away from
the windshield.
XCarefully clean the wiper blades with a
damp cloth.
XFold the windshield wiper arms back again
before switching on the ignition.
Cleaning the exterior lighting
!Only use cleaning agents or cleaning
cloths which are suitable for plastic light
lenses. Unsuitable cleaning agents or
cleaning cloths could scratch or damage
the plastic light lenses.
XClean the plastic lenses of the exterior
lights with a wet sponge and a mild cleaning
agent, e.g. Mercedes-Benz car shampoo or cleaning cloths.
Cleaning the mirror turn signals
!Only use cleaning agents or cleaning
cloths that are suitable for plastic lenses.
Unsuitable cleaning agents or cleaning
cloths could scratch or damage the plastic lenses of the mirror turn signals.
XClean the plastic lenses of the mirror turn
signals in the exterior mirror housing usinga wet sponge and mild cleaning agent, e.g.
Mercedes-Benz car shampoo or cleaning
cloths.
Cleaning the sensors
!If you clean the sensors with a power
washer, make sure that you keep a dis-
tance of at least 11.8 in (30 cm) between
the vehicle and the power washer nozzle.
Information about the correct distance is
available from the equipment manufac-
turer.
XClean sensors :of the driving systems
with water, car shampoo and a soft cloth.
Care277
Maintenance and care
Z

Checking tire pressures manually
To determine and set the correct tire pres-
sure, proceed as follows:
XRemove the valve cap of the tire that is to
be checked.
XPress the tire pressure gauge securely onto
the valve.
XRead the tire pressure and compare it to
the recommended value on the Tire and
Loading Information placard or the tire
pressure table (
Ypage 305).
XIf the tire pressure is too low, increase the
tire pressure to the recommended value.
XIf the tire pressure is too high, release air.
To do so, press down the metal pin in the
valve, using the tip of a pen for example.
Then check the tire pressure again using
the tire pressure checker.
XScrew the valve cap onto the valve.
XRepeat these steps for the other tires.
Tire pressure monitor
General notes
If a tire pressure monitor is installed, the vehi-
cle's wheels have sensors that monitor the
tire pressures in all four tires. The tire pres-
sure monitor warns you if the pressure drops
in one or more of the tires. The tire pressure
monitor only functions if the corresponding
sensors are installed in all wheels.
Information on tire pressures is displayed in
the multifunction display. After a few minutes
of driving, the current tire pressure of each
tire is shown in the Serv.
menu of the multi-
function display, see illustration (example).
For information on the message display, refer
to the "Checking the tire pressure electroni-
cally" section (
Ypage 311).
Important safety notes
GWARNING
Each tire, including the spare (if provided),
should be checked at least once every two
weeks when cold and inflated to the pressure recommended by the vehicle manufacturer
on the Tire and Loading Information placard
on the driver's door B-pillar or the tire pres-
sure label on the inside of the fuel filler flap. If
your vehicle has tires of a different size than
the size indicated on the Tire and Loading
Information placard or, if available, the tire
pressure label, you should determine the
proper tire pressure for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires
are significantly underinflated. Accordingly,
when the low tire pressure telltale lights up,
you should stop and check your tires as soon
as possible, and inflate them to the proper
pressure. Driving on a significantly underin-
flated tire causes the tire to overheat and can
lead to tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note thatthe TPMS is not a substitute for proper tire
maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure, eve n if
underinflation has not reached the level to
trigger illumination of the TPMS low tire pres-
sure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the sys-
tem detects a malfunction, the warning lamp
will flash for approximately a minute and then remain continuously illuminated. This
Tire pressure309
Wheels and tires
Z

Checking the tire pressure electroni-
cally
XMake sure that the SmartKey is in position2 in the ignition lock (
Ypage 131).
XPress =or; on the steering wheel
to select the Serv.
menu.
XPress the9or: button to select
Tire Pressure
.
XPress the abutton.
The current tire pressure of each tire is
shown in the multifunction display.
If the vehicle was parked for longer than
20 minutes, the Tire pressure will be
displayed after driving a few
minutesmessage is shown.
After a teach-in process, the tire pressure
monitor automatically detects new wheels or
new sensors. As long as a clear allocation of
the tire pressure value to the individual
wheels is not possible, the Tire Pressure
Monitor Activemessage is shown instead
of the tire pressure display. The tire pressures
are already being monitored.
Tire pressure monitor warning mes-
sages
If the tire pressure monitor detects a pressure loss in one or more tires, a warning message
is shown in the multifunction display. The yel-
low tire pressure warning lamp then lights up.
RIf the Please Correct Tire Pressure
message appears in the multifunction dis-
play, the tire pressure in at least one tire is
too low. The tire pressure must be correc-
ted when the opportunity arises.
RIf theCheck Tire Pressuremessage
appears in the multifunction display, the
tire pressure in one or more tires has drop-
ped significantly. The tires must be
checked.
RIf the Tire Pressure Warning Tire
Failuremessage appears in the multi-
function display, the tire pressure in one or
more tires has dropped suddenly. The tires
must be checked. Observe the instructions and safety notes in
the display messages in the "Tires" section
(
Ypage 223).
If the wheel positions on the vehicle are rota-
ted, the tire pressures may be displayed for
the wrong positions for a short time. This is
rectified after a few minutes of driving, and
the tire pressures are displayed for the cor-
rect positions.
Restarting the tire pressure monitor
When you restart the tire pressure monitor, all
existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the refer-
ence values for monitoring. In most cases, the
tire pressure monitor will automatically
detect the new reference values after you
have changed the tire pressure. However, you
can also define reference values manually as
described here. The tire pressure monitor
then monitors the new tire pressure values.
XSet the tire pressure to the value recom-
mended for the corresponding driving sit-
uation on the Tire and Loading Information
placard on the driver's side
B-pillar (
Ypage 305).
Additional tire pressure for various operat-
ing conditions can be found in the tire pres-
sure table in the charge socket flap
(
Ypage 148).
XMake sure that the tire pressure is correct
on all four wheels.
XMake sure that the SmartKey is in position
2 in the ignition lock (
Ypage 131).
XPress =or; on the steering wheel
to select the Serv.
menu.
XPress the9or: button to select
Tire Pressure
.
XPress the abutton.
The multifunction display shows the cur-
rent tire pressure for each tire or the Tire
Tire pressure311
Wheels and tires
Z