MERCEDES-BENZ B-CLASS SPORTS 2015 Owners Manual

Display messagesPossible causes/consequences andMSolutions
ator's Manualdisplay messages must not be shown in the
multifunction display.
X Wait for a period of at least 60 seconds until the necessary sys-
tem checks have been completed.
X Make 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 AIR BAG OFF or ON
indicator lamp remains lit or goes out depends on how OCS clas-
sifies the occupant.
If the conditions are not fulfilled, the system is not operating cor- rectly.
X Visit a qualified specialist workshop immediately.
For further information about the Occupant Classification System, see ( Ypage 47).
Lights
iVehicles with LED bulbs in the light clusters:
The display message for the corresponding light will only appear if all the LEDs have failed.
Display messagesPossible causes/consequences and MSolutions
b
Check Left Low
BeamorCheck
Right Low Beam
The left or right-hand low-beam headlamp is defective.
X Halogen headlamp: replace the bulb (Ypage 109).
X LED headlamps: consult a qualified specialist workshop.
b
Check Rear Left
Turn Signalor
Check Rear Right
Turn Signal
The rear left-hand or rear right-hand turn signal is defective.
X Tail lamps (vehicles with halogen headlamps): replace the
bulb ( Ypage 109).
X Tail lamps (vehicles with LED headlamps): visit a qualified
specialist workshop.
b
Check Front Left
Turn Signalor
Check Front Right
Turn Signal
The front left-hand or front right-hand turn signal is defective.
X Halogen headlamp: replace the bulb (Ypage 109).
X LED headlamps: consult a qualified specialist workshop.
Displaymessages219
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
b
Check Left Mirror
Turn Signalor
CheckRightMirror
Turn Signal
The turn signal in the left-hand or right-hand exterior mirror is
defective.
X Visit a qualified specialist workshop.
b
CheckCenterBrake
Lamp
The high-mounted brake lamp is faulty. XVisit a qualified specialist workshop.
b
Check Left Brake
LamporCheck
Right Brake Lamp
The left or right-hand brake lamp is defective. XVisit a qualified specialist workshop.
b
Check Left Tail
and Brake Lampsor
Check Right Tail
and Brake Lamps
The left or right-hand tail lamp/brake lamp is defective.
X Visit a qualified specialist workshop.
b
Check Left High
BeamorCheck
Right High Beam
The left or right-hand high beam is defective.
X Halogen headlamp: replace the bulb (Ypage 109).
X LED headlamps: consult a qualified specialist workshop.
b
License Plate Lamp
The left or right-hand license plate lamp is faulty.
X Check whether you are permitted to replace the bulb yourself (Y page 109).
or
X Visit a qualified specialist workshop.
b
Check Left Fog
LamporCheck Right
Fog Lamp
The left or right-hand fog lamp is faulty.
X Visit a qualified specialist workshop.
b
Rear Fog Lamp
The rear fog lamp is faulty.
X Tail lamps (vehicles with halogen headlamps): replace the
bulb ( Ypage 109).
X Tail lamps (vehicles with LED headlamps): visit a qualified
specialist workshop.
220Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
b
Check Front Left
Parking lampor
Check Front Right
Parking Lamp
The front left or front right parking or standing lamp is defective. X
Visit a qualified specialist workshop.
b
Backup Light
The backup lamp is defective.
X Tail lamps (vehicles with halogen headlamps): replace the
bulb ( Ypage 109).
X Tail lamps (vehicles with LED headlamps): visit a qualified
specialist workshop.
b
Check Left Tail
LamporCheck
Right Tail Lamp
The left or right-hand tail lamp is defective.
X Visit a qualified specialist workshop.
b
Check Front Left
Sidemarker Lampor
Check Front Right
Sidemarker Lamp
The front left-hand or front right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop.
b
Check Rear Left
Sidemarker Lampor
Check Rear Right
Sidemarker Lamp
The rear left-hand or rear right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop.
b
CheckLeftDaytime
Running Lightor
Check Right DayZ
time Running Light
The left or right-hand daytime running lamp is faulty.
X Visit a qualified specialist workshop.
b
Active Headlamps
Inoperative
The active light function is faulty.
X Visit a qualified specialist workshop.
b
Malfunction See
Operator's Manual
The exterior lighting is defective.
X Visit a qualified specialist workshop.
Display messages221
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
b
Active Headlamps
Inoperative
The light sensor is defective.
X Visit a qualified specialist workshop.
b
Switch Off Lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to Ã.
Engine
Display messagesPossible causes/consequences and MSolutions
+
Check Coolant
Level See OperaZ
tor's Manual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so (Y page 273).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop.
?The fan motor is faulty. XAt coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic.
222Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
?
Coolant Too Hot
Stop Vehicle Turn
Engine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury. X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 152).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †). Other-
wise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †).
#
SeeOperator'sManZ
ual
The battery is not being charged.
A warning tone also sounds.
Possible causes are: R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
!Do not continue driving. The engine could otherwise overheat.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 152).
X Consult a qualified specialist workshop.
Display messages223
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
#
Stop Vehicle See
Operator's Manual
The battery is no longer being charged and the battery charge level
is too low.
A warning tone also sounds.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 152).
X Observe the instructions in the #
SeeOperator'sManual
display message.
X Consult a qualified specialist workshop.
4
Check Engine Oil
WhenNextRefueling
The engine oil level has dropped to the minimum level.
A warning tone also sounds.
!Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest (Y page 272).
X If necessary, add engine oil ( Ypage 272).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com.
4
Check Engine Oil
Level(Add1quart)
The engine oil level has dropped to the minimum level.
!Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest (Y page 272).
X If necessary, add engine oil ( Ypage 272).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com.
4
Engine Oil Level
Low Stop Vehicle
Turn Engine Off
The engine oil level is too low. There is a risk of engine damage.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 152).
X Check the engine oil level ( Ypage 272).
X If necessary, add engine oil ( Ypage 272).
224Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
æ
Fuel Level Low
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station.
çThere is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail.
æ
Gas Cap Loose
The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed: X Close the fuel filler cap.
If the fuel filler cap is correctly closed: X Visit a qualified specialist workshop.
Driving systems
Display messagesPossible causes/consequences and MSolutions
À
Attention Assist:
Take a Break!
Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. A warning tone also sounds.
X If necessary, take a break.
During long journeys, take regular breaks in good time so you get enough rest.
À
Attention Assist
Inoperative
ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop.
ë
Off
The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later ( Ypage 170).
The HOLD function is deactivated. When the brake pedal is firmly
depressed, an activation condition is not fulfilled.
A warning tone also sounds.
X Check the activation conditions for the HOLD function (Y page 170).
Display messages225
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Lane Keeping
Assist Currently
Unavailable See
Operator's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are: R
the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
R there have been no lane markings for an extended period.
R the lane markings are worn, dark or covered, e.g. by dirt or snow.
When the causes stated above no longer apply, the display mes-
sage disappears.
Lane Keeping 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 ( Ypage 152).
X Clean the windshield.
Lane Keeping
Assist Inoperative
Lane Keeping Assist is faulty.
X Visit a qualified specialist workshop.
Blind Spot Assist
Currently UnavailZ
able See OperaZ
tor's Manual
Blind Spot Assist is temporarily inoperative. Possible causes are:
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 sta-
tions or other sources of electromagnetic radiation.
R the 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.
Blind Spot 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 ( Ypage 152).
X Restart the engine.
Blind Spot Assist
Inoperative
Blind Spot Assist is defective.
The yellow 9indicator lamps also light up in the exterior mir-
rors. X Visit a qualified specialist workshop.
226Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Park Assist CanZ
celed
The driver's door is open and the driver's seat belt has not been
fastened. X
Repeat the parking process with the seat belt fastened and the
driver's door closed.
You have inadvertently touched the multifunction steering wheel
while steering intervention was active.
X While steering intervention is active, make sure that the multi-
function steering wheel is not touched unintentionally.
The vehicle has started to skid and ESP ®
has intervened.
X Use Active Parking Assist again later ( Ypage 175).
ParkAssistInoperZ
ative
You have just carried out a large number of turning or parking
maneuvers.
Active Parking Assist will become available again after approx-
imately ten minutes ( Ypage 175).
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Switch off and restart the engine.
If the display message continues to be displayed: X Visit a qualified specialist workshop.
PARKTRONIC is defective.
X Visit a qualified specialist workshop.
Park Assist FinZ
ished
The vehicle is parked. A warning tone also sounds.
The display message disappears automatically.
DISTRONIC PLUS OffDISTRONIC PLUS has been deactivated ( Ypage 163).
If it was not deactivated by the driver, a warning tone also sounds.
DISTRONICPLUSNow
Available
DISTRONIC PLUS is operational again after having been tempo-
rarily unavailable. You can now reactivate DISTRONIC PLUS( Y page 163).
Display messages227
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
DISTRONICPLUSCurZ
rentlyUnavailable
SeeOperator'sManZ
ual
DISTRONIC PLUS is temporarily inoperative.
Possible causes are: 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 sta-
tions or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
A warning tone also sounds.
When the causes stated above no longer apply, the display mes-
sage disappears.
DISTRONIC PLUS 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 ( Ypage 152).
X Restart the engine.
DISTRONIC PLUS
Inoperative
DISTRONIC PLUS is defective. Adaptive Brake Assist may also
have failed.
A warning tone also sounds.
X Visit a qualified specialist workshop.
DISTRONICPLUSSusZ
pended
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
- - - mph
An activation condition for DISTRONIC PLUS is not fulfilled.
X Check the activation conditions for DISTRONIC PLUS (Y page 163).
Cruise Control
Inoperative
Cruise control is malfunctioning.
A warning tone also sounds.
X Visit a qualified specialist workshop.
Cruise Control
- - - mph
A condition for activating cruise control has not been fulfilled.
You have tried to store a speed below 20 mph (30 km/h), for
example.
X If conditions permit, drive faster than 20 mph (30 km/ h)and
store the speed.
X Check the activation conditions for cruise control ( Ypage 161).
228Display messages
On-board computer and displays