MERCEDES-BENZ B-CLASS SPORTS 2013 Owners Manual

Display messages Possible causes/consequences and
M Solutions
The red
!indicato rlamp flashes and the yellow !warning
lamp is lit.
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 !indicator lamp continues to flash:
X Do not drive on.
X Secure the vehicle against rolling away ( Ypage 313).
X Shift the transmission to P.
X Turn the fron twheels towards the curb.
X Consult a qualified specialist workshop. The yellow
!warning lamp lights up. The red !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 P.
X Visit a qualified specialist workshop.
If it is not possible to release the electric parking brake:
X Release the electric parking brake automatically (Y page 142).
If the electric parking brake still cannot be released:
X Consult a qualified specialist workshop. The yellow
!warning lamp lights up. If you manually apply or
release the electric parking brake, the red !indicator lamp
flashes.
The electric parking brake is malfunctioning. It is not possible to
apply the electric parking brake manually.
X Shift the transmission to Pas the electric parking brake is not
being applied automatically.
X Visit a qualified specialist workshop. 198
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
!
Parking Brake
Inoperative The yellow
!warning lamp lights up. The red !indicator
lamp flashes fo rabout 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
overvoltage or undervoltage.
X Remove the cause for the overvoltage or undervoltage, e.g. by
charging the battery or restarting the engine.
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. The display message is only shown while the vehicle is in motion.
The red
!indicator lamp flashes and the yellow !warning
lamp is lit.
It is not possible to apply the electric parking brake manually.
X Shift the transmission to P.
X Visit a qualified specialist workshop. !
Turn On the
Ignition to
Release the
Parking Brake The red
!indicator lamp is lit.
You attempted to release the electric parking brake while the
ignition was switched off.
X Turn the SmartKey to position 1in the ignition lock. Display messages
199On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
J
Check Brake Fluid
Level There is no
tenough brake fluid in the brake fluid reservoir.
In addition, the red Jwarning lamp lights up in the instrument
cluster and a warning tone sounds.
G WARNING
The braking effect may be impaired.
There is a ris kofanaccident.
X Pull overa nd stop the vehicle safely as soo nas possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 141).
X Do not add brake fluid. Topping up will not remedy the
malfunction.
X Consult a qualified specialist workshop. #
Check Brake Pad
Wear The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop. G
mbrace Inoperative One or more main features of the mbrace system are
malfunctioning.
X
Have the mbrace system checked immediately at a qualified
specialist workshop. 200
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
PRE-SAFE
Functions
Currently Limited
See Operator's
Manual Adaptive Brake Assis
tis temporarily inoperative. Possible causes
are:
R the radar sensor system cover in the radiator grill is dirty.
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
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.
Adaptive 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 141).
X Cleant he radar sensor cover in the radiator grill (Y page 269).
X Restart the engine. PRE-SAFE
Functions Limited
See Operator's
Manual Adaptive Brake Assist is faulty. The distance warning signal may
also have failed.
X
Visit a qualified specialist workshop. 6
SRS Malfunction
Service Required There is a malfunction in the SRS (Supplemental Restraint
System). The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Further information on occupant safety (Y page 36). Display messages
201On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
6
Front Left
Malfunction
Service Required
or
Front Right Malfunction
Service Required SRS has malfunctioned at the front on the left or right. The
6
warning lamp also lights up in the instrumen tcluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. 6
Rear Left
Malfunction
Service Required
or
Rear Right Malfunction
Service Required SRS has malfunctioneda
t the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster.
G WARNING
The ai rbags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased ris kofinjury.
X Visi taqualified specialist workshop. 6
Rear Center
Malfunction
Service Required SRS has malfunctioned at the rear center. The
6warning lamp
also lights up in the instrument cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. 6
Left Side Curtain
Airbag Malfunction
Service Required
or
Right Side Curtain Airbag
Service Required There is a malfunction in the left-hand or right-hand window
curtain air bag. The
6warning lamp also lights up in the
instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. Lights
i Display messages about LEDs: 202
Display messagesOn-board computer and displays

This display message will only appear if all LEDs have failed.
Display messages Possible causes/consequences and
M Solutions
b
Check Left
Cornering Light or
Check Right Cornering Light The left or right-hand cornering light is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left Low
Beam or
Check Right Low Beam The left or right-hand low-beam headlamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Rear Left
Turn Signal or
Check Rear Right Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Front Left
Turn Signal or
Check Front Right Turn Signal The front left-hand or front right-hand turn signal is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left Mirror
Turn Signal or
Check Right Mirror
Turn Signal The turn signal in the left-hand or right-hand exterior mirror is
defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check
Center Brake
Lamp The high-mounted brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. Display messages
203On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
b
Check Left Brake
Lamp or
Check Right Brake Lamp The lef
torright-hand brake lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left Tail
and Brake Lamps or
Check Right Tail and Brake Lamps The left or right-hand tail lamp/brake lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left High
Beam or
Check Right High Beam The left or right-hand high beam is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
License Plate Lamp The left or right-hand license plate lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left Fog
Lamp or
Check Right Fog Lamp The left-hand or right-hand front fog lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Rear Fog Lamp The rear fog lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Front Left
Parking Lamp or
Check Front Right Parking Lamp The front left or front right parking or standing lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. 204
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
b
Backup Light The backup lamp is defective.
X
Chec kwhether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Left Tail
Lamp or
Check Right Tail Lamp The left or right-hand tail lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Front Left
Sidemarker Lamp or
Check Front Right Sidemarker Lamp The left or right front side marker lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check Rear Left
Sidemarker Lamp or
Check Rear Right Sidemarker Lamp The rear left or right side marker lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Check
Left Daytime
Running Light or
Check Right Daytime Running
Light The left-hand or right-hand daytime running lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 102).
or
X Visit a qualified specialist workshop. b
Active Headlamps
Inoperative The active light function is defective.
X
Visit a qualified specialist workshop. b
Malfunction See
Operator's Manual The exterior lighting is defective.
X
Visit a qualified specialist workshop. b
Auto
Lamp Function
Inoperative The light sensor is defective.
X
Visit a qualified specialist workshop. Display messages
205On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
b
Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X
Tur nthe light switch to Ã. Adaptive Highbeam
Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Highbeam
Assist Currently
Unavailable See
Operator's Manual Adaptive Highbeam 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.
X Cleant he windshield.
If the system detects that the camera is fully operational again,
the Adaptive Highbeam Assist Now Available message is
displayed.
Adaptive Highbeam Assist is operational again. Engine
Display messages Possible causes/consequences and
M Solutions
+
Check Coolant
Level See
Operator'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 263).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist
workshop. ? The fan motor is faulty.
X
At coolant temperatures under 248 ‡(120 †), drive to the next
qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic. 206
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
?
Coolant Too Hot
Stop Vehicle Turn
Engine Off The coolan
tis too hot.
Aw arning tone also sounds.
G WARNING
Do no tdrive when youre ngine is overheated. Thi scan cause some
fluids which may have leaked into the engine compartmen tto
catch fire.
Vapor from the overheated engine can also cause serious burns
which can occu rjust by opening the hood.
There is a ris kofinjury.
X Pull ove rand stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 141).
X Leave the vehicle and kee pasafe distance from the vehicle 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 againu ntil the display message goes out
and the coolant temperature is under 248 ‡ (120 †).
Otherwise, the engine could be damaged.
X Pay attentio nto 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 †). Display messages
207On-board computer and displays Z