ECU MERCEDES-BENZ B-Class 2017 W246 Service Manual
[x] Cancel search | Manufacturer: MERCEDES-BENZ, Model Year: 2017, Model line: B-Class, Model: MERCEDES-BENZ B-Class 2017 W246Pages: 290, PDF Size: 19.81 MB
Page 156 of 290
i
The
Energy Flow
Energy Flow menu can also be dis-
played in the COMAND/Audio display.
The condition of charge of the high-voltage bat- tery has dropped into the reserve range if the
drive system is running and:
R the Drive Battery Reserve Level
Drive Battery Reserve Level mes-
sage appears in the display
R the indicator lamp in the instrument cluster
lights up
Charge the high-voltage battery from a condi-
tion of charge of less than 20% at:
R an electrical outlet
R a charging station
The braking performance of the electric motor
using recuperative braking is, in some operating
modes, either reduced or not effective:
R when the condition of charge of the high-volt-
age battery increases
R if the high-voltage battery is not yet at a nor-
mal operating temperature
R when the vehicle is almost stationary
R in transmission position N
R during and after ESP stability control
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 regenerative braking effect by applying the
brake yourself. Operating the on-board computer
Overview 0043
Multifunction display
0044 Vehicles with Audio 20: switches on voice-
operated control for navigation (see manu-
facturer's operating instructions)
Vehicles with COMAND: switches on the
Voice Control System (see the separate
operating instructions)
0087 Right control panel
0085 Left control panel
0083 Back button
X To activate the on-board computer: turn
the SmartKey to position 1in the ignition lock.
You can control the multifunction display and
the settings in the on-board computer using the buttons on the multifunction steering wheel. 154
Displays and operationOn-board computer and displays
Page 159 of 290
Energy flow
Energy flow display
The energy flow display can be shown in the
multifunction display and in the COMAND/
Audio display.
X Press the 0059or0065 button on the steering
wheel to select the Trip
Trip menu.
X Confirm by pressing 0076on the steering
wheel.
X Use 0064 or0063 to select Energy Flow
Energy Flow.
The active components are highlighted in the
energy flow display.
The energy flow is indicated by arrows. The
arrows have a different color depending on the
operating state:
R Green: energy recuperation
R White: normal energy consumption
R Red: increased energy consumption
Drive system switched on when the vehi-
cle is stationary or in overrun mode The drive system is switched on while the vehi-
cle is stationary. Alternatively, the drive system is switched on while the vehicle is in transmis-
sion position D+
or N.
The arrows indicating energy flow are not
shown.
Drive system switched off and high-volt-
age battery being charged The drive system is switched off. The charging
cable is connected and the high-voltage battery
is being charged. The arrows for the energy flow are shown in
green.
Normal driving The drive system powers the vehicle.
The arrows for the energy flow are shown in
white.
Boost driving mode If high power is required, the boost mode takes
effect.
The arrows for the energy flow are shown in red.
Energy recuperation mode The kinetic energy of the vehicle is converted
into electrical energy. The Recuperative Brake
System is active. The high-voltage battery is
being charged.
The arrows for the energy flow are shown in
green. Menus and submenus
157On-board computer and displays Z
Page 170 of 290
Safety systems
Display messages
Possible causes/consequences and
0050
0050Solutions 002500E5
Currently Unavaila‐
Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual ABS (Anti-lock Braking System), BAS (Brake Assist), ESP
®
(Electronic
Stability Program), the HOLD function, RBS (Recuperative Brake Sys- tem) and hill start assist are temporarily unavailable.
Active Brake Assist may have also failed.
The 0025, 00E5,00BBand00C6 (USA only) or 004D(Canada only)
warning lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
Possible causes are:
R Self-diagnosis is not yet complete.
R The on-board voltage may be insufficient.
G WARNING
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 regenerative brak-
ing 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 affected. 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.
X Carefully drive a short distance on a suitable stretch of road, making
slight steering movements at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned above are available again.
If the multifunction display still shows the display message:
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 002500E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual ABS, BAS, ESP
®
, the HOLD function, RBS and hill start assist are not
available due to a malfunction.
Active Brake Assist may have also failed.
The 0025, 00E5,00BB,00C6(USA only) or 004D(Canada only) and
0027 (USA only) or 004D(Canada only) warning lamps in the instru-
ment cluster may also light up.
ATTENTION ASSIST is deactivated.
G WARNING
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 regenerative brak-
ing effect by applying the brake yourself. 168
Display messagesOn-board computer and displays
Page 171 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions 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 affected. 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.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 00E5
Currently Unavaila‐ Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual ESP
®
, BAS, the HOLD function, RBS and hill start assist are tempora-
rily unavailable.
Active Brake Assist may have also failed.
The , 00E5, 00BBand00C6 (USA only) or 004D(Canada only) warning
lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
The self-diagnosis function might not be complete, for example.
G WARNING
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 regenerative brak-
ing 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.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message: X Drive on carefully.
X Visit a qualified specialist workshop immediately. Display messages
169On-board computer and displays Z
Page 172 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions 00E5
Currently Unavaila‐ Currently Unavaila‐
ble See Operator's ble See Operator's
Manual Manual ESP
®
, BAS, the HOLD function, RBS and hill start assist are not avail-
able due to a malfunction.
Active Brake Assist may have also failed.
The , 00E5, 00BBand00C6 (USA only) or 004D(Canada only) warning
lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
G WARNING
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 regenerative brak-
ing 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.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 007A0025
00E5
Inoperative See Inoperative See
Operator's Manual Operator's Manual EBD (electronic brake force distribution), ABS, BAS, ESP
®
, the HOLD
function, RBS and hill start assist are not available due to a malfunc-
tion.
Active Brake Assist may have also failed.
A warning tone sounds.
The 00E5, 00BB, 0025and00C6 (USA only) or 004D(Canada only)
warning lamps in the instrument cluster may also light up.
G WARNING
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 regenerative brak-
ing 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 affected. 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.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. 170
Display
messagesOn-board computer and displays
Page 174 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions The red
0049(USA only) or 0024(Canada only) indicator lamp flashes
and the yellow 0024warning lamp lights up.
The electric parking brake is malfunctioning.
To release:
X Switch off the ignition and turn it back on.
X Release the electric parking brake manually.
To apply: X Switch off the ignition and turn it back on.
X Apply the electric parking brake manually.
If the red 0049(USA only) or 0024(Canada only) indicator lamp con-
tinues to flash:
X Do not drive on.
X Secure the vehicle against rolling away (Y page 276).
X Shift the transmission to position P.
X Turn the front wheels towards the curb.
X Consult a qualified specialist workshop. The yellow
0024warning lamp lights up. The red 0049(USA only)
or 0024 (Canada only) indicator lamp flashes for about ten seconds
after the electric parking brake has been applied or released. It then
goes out or remains lit.
The electric parking brake is malfunctioning.
X Switch off the ignition and turn it back on.
X Apply the electric parking brake.
If it is not possible to engage the electric parking brake:
X Shift the transmission to position P.
X Visit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually: X Release the electric parking brake automatically (Y page 130).
If the electric parking brake still cannot be released:
X Consult a qualified specialist workshop. The yellow
0024warning lamp lights up. If you manually apply or
release the electric parking brake, the red 0049(USA only) or 0024
(Canada only) indicator lamp flashes.
The electric parking brake is malfunctioning. It is not possible to apply
the electric parking brake manually.
X Shift the selector lever to P, as the electric parking brake is not
applied automatically.
X Visit a qualified specialist workshop. 172
Display
messagesOn-board computer and displays
Page 175 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions 0049(USA
only)0024(Canada only)
Parking Brake Inop‐ Parking Brake Inop‐
erative erative The yellow
0024warning lamp lights up. The red 0049(USA only)
or 0024 (Canada only) indicator lamp flashes for about ten seconds
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.
X Rectify the cause of the overvoltage or undervoltage, e.g. by charg-
ing the battery or restarting the drive system.
X Engage or release the electric parking brake.
If it remains impossible to apply or release the electric parking brake:
X Switch off the ignition and turn it back on.
X Engage or release the electric parking brake.
If the electric parking brake still cannot be released:
X Consult a qualified specialist workshop.
If the electric parking brake still cannot be applied: X Visit a qualified specialist workshop. The yellow
0024warning lamp lights up and the red 0049(USA only)
or 0024 (Canada only) indicator lamp flashes.
It is not possible to apply the electric parking brake manually.
X Shift the transmission to position P.
X Visit a qualified specialist workshop. 0027(USA
only)004D(Canada only)
Check Brake Fluid Check Brake Fluid
Level Level There is not enough brake fluid in the brake fluid reservoir.
A warning tone sounds. The
0027(USA only) or 004D(Canada only)
warning lamps in the instrument cluster may also light up.
G WARNING
The braking effect may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 128).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. 0026
Check Check
Brake
BrakePad
PadWear
Wear The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop. 0053
Inoperative Inoperative One or more main features of the mbrace system are malfunctioning.
X Visit a qualified specialist workshop. Display
messages
173On-board computer and displays Z
Page 176 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions Active
Active
Brake
Brake Assist
Assist
Functions
Functions Currently
Currently
Limited See Opera‐
Limited See Opera‐
tor's Manual tor's Manual Active Brake Assist is temporarily inoperative.
Possible causes are:
R the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic 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, the display message
disappears.
Active 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 128).
X Start the drive system again. Active Brake Active Brake
Assist: Assist:
System
SystemInop‐
Inop‐
erative
erative Active Brake Assist is unavailable due to a malfunction. Situation-
dependent parking assistance may also have failed.
X Visit a qualified specialist workshop immediately. Radar
Radar
Sensors
Sensors Dirty
Dirty
See Operator's Man‐
See Operator's Man‐
ual ual The radar sensor system is malfunctioning.
Possible causes are:
R Dirt on sensors
R Heavy rain or snow
R When driving on inter-urban roads without traffic or infrastructure,
e.g. in desert-like areas
Active Brake Assist is malfunctioning or is temporarily unavailable.
A warning tone also sounds.
Active Brake Assist is available again once the cause of the problem is
no longer present. The display message disappears.
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 128).
X Switch off the drive system.
X Clean all sensors (Y page 237).
X Start the drive system again.
The display message disappears. ã
Acoustic Vehicle Acoustic Vehicle
Indication Inopera‐ Indication Inopera‐
tive tive 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.
X Drive with particular care, allowing for the possibility that other road
users may behave unpredictably.
X Visit a qualified specialist workshop. 174
Display
messagesOn-board computer and displays
Page 178 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions Front
Front
Passenger
Passenger Air‐
Air‐
bag Disabled See
bag Disabled See
Operator's Manual Operator's Manual The front-passenger front air bag is deactivated during the journey,
even though:
R an adult
or
R a person of the corresponding stature is on the front-passenger seat
If additional forces are applied to the seat, the system may interpret
the occupant's weight as lower than it actually is.
G WARNING
The front-passenger air bag does not deploy during an accident.
There is an increased risk of injury. 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 128).
X Switch the ignition off.
X Have the occupant get out of the vehicle.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R a self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R the PASSENGER AIR BAG 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 (Y page 46)
R The Front Passenger Airbag Enabled See Operator's
Front Passenger Airbag Enabled See Operator's
Manual Manual orFront Passenger¶Airbag Disabled¶See Opera‐
Front Passenger¶Airbag Disabled¶See Opera‐
tor's Manual
tor's Manual display messages must not be shown in the mul-
tifunction display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear in the multi-
function display.
If these conditions are fulfilled, the front-passenger seat can be occu-
pied again. Whether the PASSENGER AIR BAG OFF or ON indicator
lamp remains lit or goes out depends on how OCS classifies the occu-
pant.
If the conditions are not fulfilled, the system is not operating correctly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see (Y page 46). 176
Display
messagesOn-board computer and displays
Page 179 of 290
Display messages
Possible causes/consequences and
0050
0050Solutions Front
Front
Passenger
Passenger Air‐
Air‐
bag Enabled See
bag Enabled See
Operator's Manual Operator's Manual The front-passenger front air bag is enabled during the journey, even
though:
R a child, a small adult or an object weighing less than the system's
weight threshold is located on the front-passenger seat
or
R the front-passenger seat is unoccupied
The system may detect objects or forces applying additional weight on
the seat.
G WARNING
The front-passenger front air bag may deploy unintentionally.
There is an increased risk of injury.
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 128).
X Switch the ignition off.
X Open the front-passenger door.
X Remove the child and the child restraint system from the front-
passenger seat.
X Make sure that there are no objects on the seat adding to the
weight.
The system may otherwise detect the additional weight and inter-
pret the seat occupant's weight as greater than it actually is.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the PASSENGER AIR BAG indicator lamps in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R a self-diagnosis is carried out. The PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps must light up simulta-
neously for approximately six seconds
R the PASSENGER AIR BAG OFF indicator lamp must then light up
and remain lit after the self-diagnosis. If the indicator lamp is on, OCS has disabled the front-passenger front air bag (Y page 46)
R The Front Passenger Airbag Enabled See Operator's
Front Passenger Airbag Enabled See Operator's
Manual
Manual orFront Passenger Airbag Disabled See Opera‐ Front Passenger Airbag Disabled See Opera‐
tor's Manual
tor's Manual display messages must not be shown in the mul-
tifunction display
X Wait for a period of at least 60 seconds until the necessary system
checks have been completed.
X Make sure that the display messages do not appear in the multi-
function display.
If these conditions are fulfilled, the front-passenger seat can be occu-
pied again. Whether the PASSENGER AIR BAG OFF or ON indicator
lamp remains lit or goes out depends on how OCS classifies the occu-
pant.
If the conditions are not fulfilled, the system is not operating correctly. Display
messages
177On-board computer and displays Z