2016 MERCEDES-BENZ B-Class ELECTRIC Owner's Manual

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up. The red F(USA only)
or ! (Canada only) indicator lamp flashes for about ten sec-
onds after the electric parking brake has been applied or released.
It then goes out or remains lit.
The electric parking brake is malfunctioning.
XSwitc h offthe ignition and turn it back on.
XApply the electric parking brake.
If it is not possible to engage the electric parking brake:
XShift th e transmission to position P.
XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
XRelease the electric parking brake automatically (Ypage 155).
If th e electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
The yellow !warning lamp lights up. If you manually apply or
release the electric parking brake, the red F(USA only) or !
(Canada only) indicator lamp flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.
XShift th e selector lever to P, as the electric parking brake is not
applied automatically.
XVisit a qualified specialist workshop.
Display messages20 7
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
F(USA
only)
!(Canada
only)
Parking
BrakeInop‐
erative
The yellow !warning lamp lights up. The red F(USA only)
or ! (Canada only) indicator lamp flashes for about ten sec-
onds after the electric parking brake has been applied or released.
It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.
XRectify the cause of the overvoltage or undervoltage, e.g. by
chargin gth ebattery or restarting the drive system.
XEngage or release the electric parking brake.
If it remains impossible to apply or release the electric parking
brake:
XSwitc h offthe ignition and turn it back on.
XEngage or release the electric parking brake.
If th e electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
If th e electric parking brake still cannot be applied:
XVisit a qualified specialist workshop.
The yellow !warning lamp lights up and the red F(USA
only) or !(Canada only) indicator lamp flashes.
It is no t possible to apply the electric parking brake manually.
XShift th e transmission to position P.
XVisit a qualified specialist workshop.
$(USA
only)
J(Canada
only)
Check Brake Fluid
Level
There is not enough brake fluid in the brake fluid reservoir.
A warning tone sounds. The $(USA only) or J(Canada
only) warning lamps in the instrument cluster may also light up.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
XSecur eth e vehicle against rolling away (Ypage 153).
XConsult a qualified specialist workshop.
XDo no t add brake fluid. This does not correctth e malfunction.
208Display messages
On-board computer and displays

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
6
FrontLeftMalfunc‐
tion Service
RequiredorFront
Right Malfunction
Service Required
The restraint system has malfunctioned at the front on the left or
right. The 6warning lamp also lights up in the instrument clus-
ter.
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.
6
Rear Left Malfunc‐
tion Service
Requiredor Rear
Right Malfunction
Service Required
The rear left-hand or right-hand restraint system has malfunc-
tioned. 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.
6
Rear Center Mal‐
function Service
Required
The rear center restraint system has malfunctioned. The 6
warning 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.
6
Left Side Curtain
AirbagMalfunction
Service Required
or Right Side Cur‐
tain Airbag Mal‐
function Service
Required
There is a malfunction in the left-hand or right-hand window cur-
tain air bag. The 6warning lamp also lights up in the instrument
cluster.
GWARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be trig-
gered.
There is an increased risk of injury.
XVisit a qualified specialist workshop immediately.
Display messages21 1
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Front Passenger
Airbag Disabled
SeeOperator'sMan‐
ual
The front-passenger air bag is deactivated during the journey, even
though:
Ran adult
or
Ra person of the corresponding stature is on the front-passenger
seat
If additional forces are applied to the seat, the system may inter-
pret the occupant's weight as lower than it actually is.
GWARNING
The front-passenger air bag does not deploy during an accident.
There is an increased risk of injury.
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 hth e ignition off.
XHave the occupant get out of the vehicle.
XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
XObserve thePASSENGER AI RBA G indicator lamps in the center
console and th e multifunction display and check the following:
Seat unoccupied and ignition switched on:
Ra self-diagnosis is carried out. The PASSENGER AIR BAG OFF
and PASSENGER AI RBA G ON indicator lamps must light up
simultaneously for approximately six seconds
Rth ePASSENGER AI RBA G OFF indicator lamp must then light
up and remain lit after the self-diagnosis. If the indicator lamp
is on, OCS (Occupant Classification System) has disabled the
front-passenger front air bag (
Ypage 50)
Rth eFront Passenger Air Bag Enabled See Opera‐
tor's Manualor Front Passenger Air Bag Disabled
See Operator's Manualdisplay messages must not be
shown in the multifunction display
XWait fo raperiod of at least 60 seconds until the necessary sys-
te m checks have been completed.
XMake sure that the display messages do not appear in the mul-
tifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIRBA G OFF or ON
indicator lamp remains lit or goes out depends on how OCS clas-
sifies the occupant.
212Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
If the conditions are not fulfilled, the system is not operating cor-
rectly.
XVisit a qualified specialist workshop immediately.
Fo r further information about the Occupant Classification System,
see (
Ypage 50).
Front Passenger
AirbagEnabledSee
Operator's Manual
The front-passenger air bag is enabled during the journey, even
though:
Ra child, a small adult or an object weighing less than the sys-
tem' s weight threshold is located on the front-passenger seat
or
Rth e front-passenger seat is unoccupied
The system may detect objects or forces applying additional
weight on the seat.
GWARNING
The air bag may deploy unintentionally.
There is an increased risk of injury.
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 hth e ignition off.
XOpen the front-passenger door.
XRemove th e child and the child restraint system from the front-
passenger seat.
XMake sure that there are no objects on the seat adding to the
weight.
The system may otherwise detect the additional weight and
interpret the seat occupant's weight as greater than it actually
is.
XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
XObserve thePASSENGER AI RBA G indicator lamps in the center
console and th e multifunction display and check the following:
Se at unoccupied and ignition switched on:
Ra self-diagnosis is carried out. The PASSENGER AIR BAG OFF
and PASSENGER AI RBA G ON indicator lamps must light up
simultaneously for approximately six seconds
Rth ePASSENGER AI RBA G OFF indicator lamp must then light
up and remain lit after the self-diagnosis. If the indicator lamp
Display messages21 3
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
is on, OCS has disabled the front-passenger front air bag
(
Ypage 50)
RtheFront Passenger Air Bag Enabled See Opera‐
tor's Manualor Front Passenger Air Bag Disabled
See Operator's Manualdisplay messages must not be
shown in the multifunction display
XWait fo raperiod of at least 60 seconds until the necessary sys-
te m checks have been completed.
XMake sure that the display messages do not appear in the mul-
tifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIRBA G OFF or ON
indicator lamp remains lit or goes out depends on how OCS clas-
sifies the occupant.
If th e conditions are not fulfilled, the system is not operating cor-
rectly.
XVisit a qualified specialist workshop immediately.
Fo r further information about the Occupant Classification System,
see (
Ypage 50).
Lights
i
Vehicles with LED bulbs in the light clusters:
The display message for the corresponding lamp only appears when all of the LEDs in the
lamp have failed.
Display messagesPossible causes/consequences and MSolutions
b
Check Left Corner‐
ing LightorCheck
Right Cornering
Light
The left or right-hand cornering light is defective.
XCheck whether you are permitted to replace the bulb yourself
(
Ypage 104).
or
XVisit a qualified specialist workshop.
b
Check Left Low
Beamor Check
Right Low Beam
The left or right-hand low-beam headlamp is defective.
XCheck whether you are permitted to replace the bulb yourself
(
Ypage 104).
or
XVisit a qualified specialist workshop.
214Display messages
On-board computer and displays