MERCEDES-BENZ B-Class ELECTRIC 2016 W246 Owner's Manual

Display messagesPossible causes/consequences andMSolutions
Â
Key Not Detected
(white display mes-
sage)
The SmartKey is currently undetected.
XChange the location of theSmartKey in the vehicle.
If th e SmartKey still cannot be detected:
XOperate the vehicle with theSmartKey in th e ignition lock.
Â
Remove'Start'But‐
ton and Insert Key
The SmartKey is continually undetected.
KEYLESS-GO is temporarily malfunctioning or is defective. A warn-
ing tone also sounds.
XInserttheSmartKey into th e ignition lock and turn it to the
desired position.
XVisit a qualified specialist workshop.
Warning and indicator lamps in the instrument cluster
General notes
Some systems carry out a self-diagnosis when the ignition is switched on. Therefore, some
indicator and warning lamps may light up or flash temporarily. This behavior is non-critical.
These warning and indicator lamps only indicate a malfunction if they light up or flash after the
drive system is started or during a journey.
Safety
Seat belts
ProblemPossible causes/consequences and MSolutions
ü
After starting thedrive
system, the red seat
belt warning lamp lights
up for6 seconds.The seat belt warning lamp reminds the driver and front passenger
to fasten their seat belts.
XFasten your seat belt (Ypage 44).
ü
After starting thedrive
system, the red seat
belt warning lamp lights
up. In addition ,awarn-
ing tone sounds for up
to 6 seconds.The driver's seat belt is not fastened.
XFasten your seat belt (Ypage 44).
The warning tone ceases.
Warning and indicator lamps in the instrument cluster229
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
ü
The red seat belt warn-
ing lamp lights up after
the drive system starts,
as soon as the driver's
or the front-passenger
door is closed.The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 44).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out.
ü
The red seat belt warn-
ing lamp flashes and an
intermittent audible
warning sounds.The driver or front passenger has not fastened their seat belt. The
vehicle is being driven faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph (25 km/h).
XFasten your seat belt (Ypage 44).
The warning lamp goes out and the intermittent warning tone
ceases.
There are objects on the front-passenger seat. The vehicle is being
driven faster than 15 mph (25 km/h) or has briefly been driven
faster than 15 mph (25 km/h).
XRemove the objects from the front-passenger seat and stow
them in a secure place.
The warning lamp goes out and the intermittent warning tone
ceases.
230Warning and indicator lamps in the instrument cluster
On-board computer and displays

Safety systems
ProblemPossible causes/consequences andMSolutions
é(USA only)
J (Canada only)
The yellow RBS (USA
only)/brakes (Canada
only) warning lamp is lit
while the drive system
is running.The brake system is malfunctioning.
GWARNING
The braking characteristics may be affected.
There is a risk of an accident.
XDrive on taking extra care.
XVisit a qualified specialist workshop immediately.
é (USA only)
J (Canada only)
The yellow RBS (USA
only)/brakes (Canada
only) warning lamp is lit
while the drive system
is running.RBS (Recuperative Brake System) is unavailable due to a malfunc-
tion.
GWARNING
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 regen-
erative braking effect by applying the brake yourself.
The brake system continues to function normally, but without the
function listed above.
The braking effect may be impaired.
XDrive on taking extra care.
XVisit a qualified specialist workshop immediately.
$ (USA only)
J (Canada only)
The red brake system
warning lamp is lit while
the drive system is run-
ning. A warning tone
also sounds.GWARNING
The brake boosting effect is malfunctioning and the braking char-
acteristics may be affected.
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.
XSecure the vehicle against rolling away (Ypage 153).
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction
display.
Warning and indicator lamps in the instrument cluster231
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
$(USA only)
J (Canada only)
The red brake system
warning lamp is lit while
the drive system is run-
ning. A warning tone
also sounds.There is not enough brake fluid in the brake fluid reservoir.
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.
XSecure the vehicle against rolling away (Ypage 153).
XDo not add brake fluid. Adding more will not remedy the mal-
function.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction
display.
!֌
é (USA only)
J (Canada only)
The yellow ABS, ESP
®,
ESP®OFF and
RBS (USA only)/brakes
(Canada only) warning
lamps are lit while the
drive system is running.
ABS (Anti-lock Braking System) is deactivated due to a malfunc-
tion. Therefore, BAS (Brake Assist), COLLISION PREVENTION
ASSIST PLUS, ESP
®(Electronic Stability Program), RBS, the HOLD
function and hill start assist are also deactivated, for example.
ATTENTION ASSIST is deactivated.
GWARNING
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 regen-
erative braking 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 affec-
ted. 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.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is malfunctioning, other systems may also
not be available, e.g. the navigation system.
232Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
!֌
é(USA only)
J (Canada only)
The yellow ABS, ESP
®,
ESP®OFF and
RBS (USA only)/brakes
(Canada only) warning
lamps are lit while the
drive system is running.
ABS is temporarily unavailable. Therefore, BAS, COLLISION PRE-
VENTION ASSIST PLUS, ESP®, EBD (electronic brake force distri-
bution), the HOLD function and hill start assist are also deactiva-
ted, for example.
Possible causes are:
RSelf-diagnosis is not yet complete.
RThe on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
GWARNING
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 regen-
erative braking effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is a risk of an accident.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster233
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
!֌
é(USA only)
J (Canada only)
The yellow ABS, ESP
®,
ESP®OFF and
RBS (USA only)/brakes
(Canada only) warning
lamps are lit while the
drive system is running.
EBD is malfunctioning. Therefore, ABS, BAS, COLLISION PREVEN-
TION ASSIST PLUS, ESP®, RBS, the HOLD function and hill start
assist are unavailable, for example.
ATTENTION ASSIST is deactivated.
GWARNING
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 regen-
erative braking effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. 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.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
234Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
$(USA only)
J (Canada only)
!֌
The red brake system
warning lamp and the
yellow ABS, ESP
®and
ESP®OFF warning
lamps are lit while the
drive system is running.
ABS and ESP®are malfunctioning. Therefore, BAS, RBS, COLLI-
SION PREVENTION ASSIST PLUS, EBD, the HOLD function and hill
start assist are also unavailable, for example.
ATTENTION ASSIST is deactivated.
GWARNING
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 regen-
erative braking effect by applying the brake yourself.
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. 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.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
÷
The yellow ESP
®warn-
ing lamp flashes while
the vehicle is in motion.
ESP®or traction control has intervened because there is a risk of
skidding or at least one wheel has started to spin.
Cruise control is deactivated.
XWhen pulling away, only depress the accelerator pedal as far as
necessary.
XEase off the accelerator pedal while the vehicle is in motion.
XAdapt your driving style to suit the road and weather conditions.
XDo not deactivate ESP®.
In rare cases (
Ypage 67) , it may be best to deactivate ESP®.
Observe the important safety notes on ESP
®(Ypage 66).
Warning and indicator lamps in the instrument cluster235
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
å
The yellow ESP
®OFF
warning lamp is lit while
the drive system is run-
ning.
ESP®is deactivated. ESP®will not stabilize the vehicle if it starts to
skid or if a wheel starts to spin.
GWARNING
If ESP®is switched off, ESP®is unable to stabilize the vehicle.
Further driving systems or driving safety systems are thus restric-
ted.
There is an increased risk of skidding and an accident.
XReactivate ESP®.
In rare cases (
Ypage 67) , it may be best to deactivate ESP®.
Observe the important safety notes on ESP
®(Ypage 66).
XAdapt your driving style to suit the road and weather conditions.
If ESP
®cannot be activated:
XDrive on carefully.
XContact a qualified specialist workshop and have ESP®
checked.
֌
é (USA only)
J (Canada only)
The yellow ESP
®, ESP®
OFF and RBS (USA
only)/brakes (Canada
only) warning lamps are
lit while the drive sys-
tem is running.
ESP®, RBS, BAS, COLLISION PREVENTION ASSIST PLUS, the
HOLD function and hill start assist are not available due to a mal-
function.
ATTENTION ASSIST is deactivated.
GWARNING
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 regen-
erative braking 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.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
236Warning and indicator lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
֌
é(USA only)
J (Canada only)
The yellow ESP
®, ESP®
OFF and RBS (USA
only)/brakes (Canada
only) warning lamps are
lit while the drive sys-
tem is running.
ESP®, BAS, the HOLD function and hill start assist are temporarily
unavailable.
COLLISION PREVENTION ASSIST PLUS may also have failed.
ATTENTION ASSIST is deactivated.
Self-diagnosis is not yet complete.
GWARNING
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 regen-
erative braking 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.
XCarefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
The functions mentioned above are available again when the
warning lamp goes out.
If the warning lamp is still on:
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
Warning and indicator lamps in the instrument cluster237
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
F(USA only)
! (Canada only)
The red indicator lamp
for the electric parking
brake flashes or lights
up and/or the yellow
warning lamp for the
electric parking brake
lights up.XObserve the additional display messages in the multifunction
display.
6
The red restraint sys-
tem warning lamp is lit
while the drive system
is running.The restraint system is faulty.
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.
XObserve the additional display messages in the multifunction
display.
XDrive on carefully.
XContact a qualified specialist workshop and have the restraint
system checked.
For further information about the restraint system, see
(
Ypage 40).
Drive system
ProblemPossible causes/consequences and MSolutions
Ý
The yellow battery
charge warning lamp is
on.The charge level of the high-voltage battery has dropped into the
reserve range.
XCharge the high-voltage battery.
238Warning and indicator lamps in the instrument cluster
On-board computer and displays