MERCEDES-BENZ R-CLASS FAMILY TOURER 2013 Owners Manual

Display messages Possible causes/consequences and
M Solutions
$(USA
only)
J(Canada
only)
Check Brake Fluid Level There is no
tenough brake fluid in the brake fluid reservoir. In
addition, the $(USA only)/J (Canada only) warning 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 166).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. #
Brake Wear The brake pads/linings have reached their wear limit.
X
Visit a qualified specialist workshop. G
Tele Aid
Inoperative USA only: one or more of the main functions in the mbrace system
are malfunctioning.
Canada only: one or more of the main functions of the TELEAID
system are malfunctioning.
X
USA only: have the mbrace system checked at aqualified
specialist workshop.
X Canada only: have the TELEAI Dsystem checked at a qualified
specialist workshop. PRE-SAFE
Inoperative See
Operator's Manual Important function
sof PRE-SAFE ®
have failed.A ll other occupant
safety systems, e.g. air bags, remain available.
X Visit a qualified specialist workshop immediately. +
Restraint Sys.
Malfunction
Service Required There is a malfunction in the SRS (Supplemental Restraint
System).
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 safet y(Ypage 41). 218
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
Front Passenger
Airbag Enabled See
Operator's Manual The front-passenger air bag is enabled during the journey, even
though:
R
a child, a small adult or an objec tweighing 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 detec tobjects or forces applying additional
weight on the seat.
G WARNING
The 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 166).
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 no objects are exerting force on the seat, e.g.:
R
trapped books, bags, etc .lying on, behind or beside the seat
R head restraints pressing against the headliner
The system may otherwise detec tthese forces and interpret 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 42 indicator lamp in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the 42 indicator lamp must light up and remain lit.
When the indicator lamp is on, OCS (Occupant Classification
System) has disabled the front-passenger air bag (Y page 46).
R the Front Passenger Airbag Enabled See Operator's Manual or
Front Passenger Airbag Disabled See Operator's Manual display messages must not be shown in
the multifunction 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 appearint he
multifunction display. Display messages
219On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
If these conditions are fulfilled, the front-passenger seat can be
occupied again
.Whether the 42 indicator lamp
remains lit or goes out depends on how OCS classifies the
occupant.
If the conditions are not fulfilled, the system is not operating
correctly.
X Visit a qualified specialist workshop immediately. Front Passenger
Airbag Disabled
See Operator's
Manual The front-passenger air bag is disabled during the journey, even
though:
R
an adult
or
R a person larger than a certain size is occupying 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 166).
X Switch the ignition off.
X Have the occupant get out of the vehicle.
X Set the seat higher (Y page 102).
X Make sure that no objects are exerting force on the seat, e.g.
books, bags etc. lying under, behind or beside the seat.
These forces may otherwise cause the system to detect too low
a weight and interpret the seat occupant's weight as less than
it actually is.
X Keep the seat unoccupied, close the front-passenger door and
switch on the ignition.
X Observe the 42 indicator lamp in the center
console and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the 42 indicator lamp must light up and remain lit.
When the indicator lamp is on, OCS has disabled the front-
passenger air bag (Y page 46).
R the Front Passenger Airbag Enabled See Operator's Manual or
Front Passenger Airbag Disabled See 220
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
Operator's Manual display messages mus
tnot be shown in
the multifunction 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
multifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the 42indicator lamp
remains lit or goes out depends on how OCS classifies the
occupant.
If the conditions are not fulfilled, the system is not operating
correctly.
X Visit a qualified specialist workshop immediately. Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Display messages Possible causes/consequences and
M Solutions
b
Low Beam Left
orLow
Beam Right The left or right-hand low-beam headlamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Trailer Tail Lamp
Left orTrailer Tail
Lamp Right The left or right-hand trailer tail lamp is faulty.
X
Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Trailer Turn
Signal
Left orTrailer Turn
Signal Right The left or right-hand trailer turn signal lamp is defective.
X
Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Trailer Brake Lamp The trailer brake lamp is defective.
X
Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. Display messages
221On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
b
Turn Signal Rear
Left orTurn Signal
Rear Right The rear left-hand or rear right-hand tur
nsignal is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Turn Signal Front
Left orTurn Signal
Front Right 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 126).
or
X Visit a qualified specialist workshop. b
Turn Signal Left
Mirror orTurn
Signal Right Mirror 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 126).
or
X Visit a qualified specialist workshop. b
3rd Brake Lamp The high-mounted brake lamp is faulty.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Brake Lamp
Left orBrake Lamp
Right The left or right-hand brake lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
High Beam
Left orHigh Beam
Right The left or right-hand high beam is defective.
X
Check whether you are permitted to change the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. 222
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
b
License
Plate Lamp
Left orLicense
Plate Lamp Right The lef
torright-hand license plate lamp is defective.
X Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Front Foglamp
Left orFront
Foglamp Right The left-hand or right-hand front fog lamp is defective.
X
Check whether you are permitted to change the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Foglamp Rear
Left orFoglamp Rear
Right The left-hand or right-hand rear fog lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Parking
Lamp Front
Left orParking Lamp
Front Right 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 126).
or
X Visit a qualified specialist workshop. b
Reverse Lamp
Left orReverse lamp
Right The left or right-hand backup lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Marker Lamp Front
Left orMarker Lamp
Front Right The left or right front side marker lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
Tail Lamp
Left orTail Lamp
Right The left or right-hand tail lamp is defective.
X
Check whether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. Display messages
223On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
b
Daytime Running
Light
Left orDaytime
Running Light Right The left-hand or right-hand daytime running lamp is faulty.
X
Chec kwhether you are permitted to replace the bulb yourself
(Y page 126).
or
X Visit a qualified specialist workshop. b
AUTO Light
Inoperative The light sensor is defective.
X
Visit a qualified specialist workshop.
USA only:
X Switch off the daytime running lamps in the on-board computer
(Y page 207).
X Switch the lights on and off using the light switch. 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 $orÃ.
or
X If the rear fog lamp is switched on: press the light switch in to
the stop. Engine
Display messages Possible causes/consequences and
M Solutions
+
Top
Up Coolant 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 287).
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. 224
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
?
Coolant Stop car,
switch 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.
Stea mfrom 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 (Y page 166).
X Leave the vehicle and keep a safe 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 again until the display message goes out
and the coolant temperature is under 248 ‡ (120 †).
Otherwise, 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 †). Display messages
225On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
# The battery is no
tbeing charged.
Aw arning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
X Pull ove rand stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Ope nthe hood.
X Check whether the poly-V-belt is torn.
If the poly-V-belt is torn:
! Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is not damaged:
X Visit a qualified specialist workshop. #
Battery /
Alternator Stop
Vehicle The battery is defective.
You will need to use considerably more force to brake. The brake
pedal travel and braking distance will increase. If necessary,
depress the brake pedal with maximum force.
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 Apply the parking brake.
X Consult a qualified specialist workshop. 4
Check engine oil
level at next
refueling The engine oil level has dropped to the minimum level.
Aw
arning tone also sounds.
X Chec kthe oil level when next refueling, at the latest
(Y page 286).
X If necessary, add engine oil (Y page 286).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
www.mbusa.com (USA only). 226
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
8
Reserve Fuel The fuel level has dropped into the reserve range.
X
Refuel at the neares tgas station. C There is only a very small amoun
toffuel in th efuel tank.
X Refuel at the neares tgas statio nwithout fail. 8
Gas Cap Open 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. 8
Ultra Low-sulfur
Diesel Fuel Only Vehicles with a diesel engine: the fuel level has fallen below the
reserve range.
X
Refuel at the nearest gas station.
X Only use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD, 15ppm SULFUR MAXIMUM). ¸
Replace air filter Vehicles with a diesel engine: the engine air filter is dirty and must
be replaced.
X
Visit a qualified specialist workshop. ·
Clean Fuel Filter Vehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.
X
Visit a qualified specialist workshop. Ø
Check
Additive See
Operator's Manual The DEF tank is almost empty.
X
Have the DE Ftank refilled as soon as possible at a qualified
specialist workshop (Y page 164).Ø
Remaining Starts:
16 The DE
Flevel has fallen to a minimum. You can start the engine a
further 16 times.
X Have the DEFt ank refilled as soon as possible at a qualified
specialist workshop (Y page 164).
i You can start the engine a further 16 times. If DE Fis not added,
it will then not be possible to restart the engine. add DEF tank
with approximately 1gal (3. 8l) DEF( Ypage 164). Display messages
227On-board computer and displays Z