2015 MERCEDES-BENZ B-CLASS SPORTS Owners Manual

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

Tires
Display messagesPossible causes/consequences andMSolutions
Check Tire PresZ
sure Soon
The tire pressure loss warning system has detected a significant
loss in pressure.
A warning tone also sounds.
Possible causes:
R you have changed the positions of the wheels and tires or instal-
led new wheels and tires.
R the tire pressure in one or more tires is not correct.
GWARNING
Tire pressures that are too low pose the following hazards:
R they may burst, especially as the load and vehicle speed
increase.
R they may wear excessively and/or unevenly, which may greatly
impair tire traction.
R the driving characteristics, as well as steering and braking, may
be greatly impaired.
There is a risk of an accident.
X Stop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.
X Secure the vehicle against rolling away ( Ypage 152).
X Check the tires and, if necessary, follow the instructions for a
flat tire ( Ypage 284).
X Check the tire pressures and, if necessary, correct the tire pres-
sure.
X Restart the tire pressure loss warning system when the tire
pressure is correct ( Ypage 309).
Check Tire PresZ
sure Then Restart
Run Flat Indicator
The tire pressure loss warning system generated a display mes-
sage and has not been restarted since.
X Set the correct tire pressure in all four tires.
X Restart the tire pressure loss warning system ( Ypage 309).
RunFlatIndicator
inoperative
The tire pressure loss warning system is faulty.
X Visit a qualified specialist workshop.
Display messages229
On-board computer and displays
Z

Vehicle
Display messagesPossible causes/consequences andMSolutions
Depress Brake to
Start Engine
You have attempted to start the engine with the transmission in
positionNwithout depressing the brake pedal.
X Depress the brake pedal.
To Deselect P or
N, Depress Brake
and Start Engine
You have attempted to shift the selector lever to position Ror D
without starting the engine. X Start the engine.
X Depress the brake pedal.
iIt is only possible to move the selector lever from position Pto
the desired position if you depress the brake pedal. Only then
can the parking lock be deactivated. If you do not depress the
brake pedal, the DIRECT SELECT lever can still be moved but the parking lock remains engaged.
iAt transmission fluid temperatures below Ò4 ‡( Ò20 †) you can
only shift out of position Pinto another transmission position
when the engine is running.
Apply Brake to
Shift from 'P'
You have attempted to shift the selector lever to position R,N or D
without depressing the brake pedal.
X Depress the brake pedal.
Transmission Not
in P Risk of VehiZ
cle Rolling Away
The driver's door is open/not fully closed and the selector lever is
in position R,N or D.
A warning tone also sounds.
GWARNING
The vehicle may roll away.
There is a risk of an accident. X Shift the selector lever to position P.
X Secure the vehicle against rolling away ( Ypage 152).
X Close the driver's door completely.
230Display messages
On-board computer and displays