radio MERCEDES-BENZ R-Class 2012 W251 Owner's Manual

Symbols
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In this Operator's Manual, you will find the
following symbols:GWARNING
Warning notes draw your attention to hazards
that endanger your health or life, or the health
or life of others.
! These warning notes draw your attention
to hazards that could cause damage to your
vehicle.
i This symbol indicates useful instructions
or further information that could be helpful
to you.XThis symbol designates an
instruction you must follow.XSeveral consecutive symbols
indicate an instruction with several
steps.Y PageThis symbol tells you where you
can find further information on a
topic.YYThis symbol indicates a warning or
an instruction that is continued on
the next page.DisplayThis font indicates a display
message in the multifunction
display/COMAND display.
Parts of the software in the vehicle are
subject to copyright according to ©
2005
The FreeType Project
http://www.freetype.org. All rights
reserved.

Pulling away (automatic
transmission) ..................................... 147
Q
Qualified specialist workshop ........... 24
R
Radar sensor system Activating/deactivating .................208
Radiator cover ................................... 283
Radio Selecting a station .........................203
see separate operating instructions
Radio-controlled devices
(installing) .......................................... 279
Reading lamp ..................................... 118
Rear axle level control ...................... 180
Rear bench seat Folding forwards/back ..................253
Rear compartment
Activating/deactivating climate
control ........................................... 134
Setting the air vents ......................142
Setting the temperature ................137
Rear-compartment seat
see Rear seat
Rear fog lamp
Display message ............................ 224
Switching on/off ........................... 116
Rear lamps
see Lights
Rear seat
Adjusting ....................................... 101
Rear view camera
Cleaning instructions .....................292
Function/notes ............................. 187
Rear-view mirror
Anti-glare (manual) ........................109
Dipping (automatic) .......................111
Rear window defroster
Problem (malfunction) ...................139
Rear window heating
Switching on/off ........................... 139
Rear window wiper
Replacing the wiper blade .............. 126
Switching on/off ........................... 125
Refueling
Fuel gauge ....................................... 29
Important safety notes ..................156
Refueling process ..........................158
see Fuel
Remote control
Garage door opener .......................275
Reporting
Malfunctions relevant to safety ........ 24
Reserve (fuel tank)
see Fuel
Reserve fuel
Display message ............................ 228
Warning lamp ................................. 244
see Fuel
Reset button ........................................ 29
Residual heat (climate control) ........ 140
Restraint system see SRS (Supplemental Restraint
System)
Roadside Assistance (breakdown) .... 22
Roller blind see Roller sunblind
Roller sunblind
Panorama roof with power tilt/
sliding panel ..................................... 91
Rear side windows .........................265
Roof carrier ........................................ 262
Roof lining and carpets (cleaning
guidelines) ......................................... 294
Roof load (maximum) see Technical data
Route
see Route guidance (navigation)
Route guidance (navigation) ............ 204
S
Safety Children in the vehicle .....................56
Child restraint systems ....................56
Occupant Classification System
(OCS) ............................................... 44
Overview of occupant safety
systems ........................................... 38
Safety systems
see Driving safety systems
14Index

Door central locking/unlocking .......72
Important safety notes ....................72
Loss ................................................. 78
Mechanical key ................................ 75
Positions (ignition lock) .................145
Problem (malfunction) .....................78
Starting the engine ........................146
Snow chains .............................. 169, 325
Sockets 2nd row of seats ............................ 268
Center console .............................. 268
Front-passenger footwell ...............268
Luggage compartment ...................268
Points to observe before use .........267
Spare wheel
Notes/data .................................... 349
Storage location ............................ 297
Stowing .......................................... 298
see Emergency spare wheel
Specialist workshop ............................ 24
Speed, controlling see Cruise control
Speedometer
Additional speedometer (on-
board computer) ............................ 202
In the Instrument cluster .................29
Segments ...................................... 199
Selecting the unit of
measurement ................................ 205
see Instrument cluster
SRS (Supplemental Restraint
System) Display message ............................ 218
Introduction ..................................... 38
Warning lamp ................................. 243
Warning lamp (function) ................... 38
Standing lamps
Changing bulbs .............................. 122
Display message ............................ 224
Switching on/off ........................... 114
Starting (engine) ................................ 146
Station see Radio
Steering (display message) .............. 235
Steering wheel Adjusting (electrically) ...................108
Adjusting (manually) ......................107
Button overview ............................... 31Buttons (on-board
computer) ...................................... 199
Important safety notes ..................107
Paddle shifters ............................... 153
Steering wheel heating ..................108
Storing settings (memory
function) ........................................ 112
Steering wheel (cleaning
instructions) ...................................... 293
Steering wheel heating Indicator lamp (malfunction) ..........108
Switching on/off ........................... 108
Steering wheel paddle shifters ........ 153
Stowage compartments 3rd row of seats ............................. 250
Armrest (under) ............................. 250
Center air vents (2nd row of
seats) ............................................. 250
Center console (2nd row of seats) . 250
Glove box ....................................... 249
Parcel net ...................................... 251
Stowage space
Center console .............................. 249
Cup holders ................................... 262
Important safety information .........248
Summer opening
see Convenience opening feature
Summer tires ..................................... 324
Sun visor ............................................ 264
Supplement Restraint System see SRS (Supplemental Restraint
System)
Surround lighting (on-board
computer) .......................................... 207
Switching air-recirculation mode
on/off ................................................. 140
Switching off the alarm (ATA) ............ 69
T
Tachometer ........................................ 198
Tailgate Display message ............................ 235
Important safety notes ....................81
Limiting the opening angle ...............85
Opening/closing (automatically
from inside) ...................................... 84
16Index

Problems with the SmartKeyProblemPossible causes/consequences and M SolutionsYou cannot lock or
unlock the vehicle
using the SmartKey.The SmartKey battery is discharged or nearly discharged.XTry again to lock/unlock the vehicle using the remote control
function of the SmartKey. Point the tip of the SmartKey at the
driver's door handle from close range and press the %/
& button.
If this does not work:
XCheck the SmartKey battery and replace it if necessary
( Y page 76).XLock ( Y page 81) or unlock ( Y page 81) the vehicle using
the mechanical key.The SmartKey is faulty.XLock ( Y page 81) or unlock ( Y page 81) the vehicle using
the mechanical key.XHave the SmartKey checked at a qualified specialist workshop.You can no longer lock
or unlock the vehicle
using KEYLESS-GO.KEYLESS-GO is in standby mode because the vehicle has not been
unlocked for an extended period.XPull the door handle twice and then insert the SmartKey into the
ignition lock.There is interference from a powerful source of radio waves.XLock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the %/& button.There is a malfunction with KEYLESS-GO.XLock/unlock the vehicle using the remote control function of
the SmartKey. Point the tip of the SmartKey at the driver's door
handle from close range and press the %/& button.XHave KEYLESS-GO checked at a qualified specialist workshop.
If this does not work:
XCheck the SmartKey battery and replace it if necessary
( Y page 76).XLock ( Y page 81) or unlock ( Y page 81) the vehicle using
the mechanical key.You have lost a
SmartKey.XHave the SmartKey canceled at an authorized Mercedes-Benz
Center.XReport the loss immediately to the vehicle insurers.XIf necessary, have the locks changed as well.78SmartKeyOpening/closing

ProblemPossible causes/consequences and M SolutionsYou have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.XIf necessary, have the locks changed as well.The engine cannot be
started using the
SmartKey.The on-board voltage is too low.XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
( Y page 310).
or
XJump-start the vehicle ( Y page 313).
or
XConsult a qualified specialist workshop.The engine cannot be
started using KEYLESS-
GO. The SmartKey is in
the vehicle.A door is open. Therefore, the SmartKey cannot be detected as
easily.XClose the door and try to start the vehicle again.There is interference from a powerful source of radio waves.XStart your vehicle with the SmartKey in the ignition lock.Doors
Important safety notes
GWARNING
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.GWARNING
Do not carry heavy or hard objects in the
passenger compartment or cargo
compartment unless they are firmly secured
in place.
Doors79Opening/closingZ

Problems with PARKTRONICProblemPossible causes/consequences and M SolutionsOnly the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is
deactivated after
approximately
20 seconds, and the
indicator lamp in the
PARKTRONIC button
lights up.PARKTRONIC has malfunctioned and has switched off.XIf problems persist, have PARKTRONIC checked at a qualified
specialist workshop.Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is
deactivated after
approximately 20
seconds.The PARKTRONIC sensors are dirty or there is interference.XClean the PARKTRONIC sensors ( Y page 291).XSwitch the ignition back on.The problem may be caused by an external source of radio or
ultrasound waves.XSee if PARKTRONIC functions in a different location.Rear view camera
Important safety notes
The rear view camera is an optical parking aid.
It shows the area behind your vehicle in the
COMAND display.
GWARNING
Make sure that no persons or animals are in
the maneuvering range. Otherwise, they
could be injured.
The rear view camera is located in the handle
strip of the tailgate.
:Rear view camera
View through the camera
The area behind the vehicle is displayed as a
mirror image, as in the rear-view mirror.
Driving systems187Driving and parkingZ

XPress the V or U button on the
steering wheel to select the standard
display.XPress the & or * button to select
digital speedometer or the outside
temperature.
Digital speedometer
Outside temperature
Audio menu
Selecting a radio station
i SIRIUS XM satellite radio acts like a
normal radio.
For more information on satellite radio
operation, see the separate operating
instructions.
You can only change the waveband and store
new stations using COMAND.
XSwitch on COMAND and select Radio (see
the separate operating instructions).XPress the V or U button on the
steering wheel to select the Audio menu.:Waveband 24;Current stationXTo select a stored station:
briefly press
the & or * button.XTo select a station from the station
list: press and briefly hold the & or
* button.XTo select a station using station
search 25
: press and briefly hold the &
or * button.
Operating audio player or audio media
Audio data from various audio devices or
media can be played, depending on the
equipment installed in the vehicle.
XSwitch on COMAND and select the audio
device or medium (see the separate
operating instructions).XPress the V or U button on the
steering wheel to select the Audio menu.
CD changer display (example)
:Current CD;Current track24
If current station ; has been stored, the memory position will also be displayed.
25 Only if no station list is received.Menus and submenus203On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsBlind Spot Assist
Currently
Unavailable, See
Operator's ManualBlind Spot Assist is temporarily inoperative if:
R the sensors are dirty.
R its function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
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.
The yellow 9 indicator lamps also light up in the exterior
mirrors.
Blind Spot Assist is operational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the radar sensor system is back within the operating
temperature range.
If the display message continues to be displayed:XClean the sensors ( Y page 291).XRestart the engine.Blind Spot Assist
InoperativeBlind Spot Assist is defective.
The yellow 9 indicator lamps also light up in the exterior
mirrors.XVisit a qualified specialist workshop.Cruise Control
InoperativeCruise control is defective.XVisit a qualified specialist workshop.Cruise Control
--- MPH A condition for activating cruise control has not been fulfilled.
You attempted to save a speed of less than 20 mph (30 km/h).XIf the situation allows, drive faster than 20 mph ( 30 km/h) and
save the speed.XCheck the activation conditions for cruise control
( Y page 170).DISTRONIC
--- MPH An activation condition for DISTRONIC is not fulfilled.XCheck the activation conditions for DISTRONIC ( Y page 173).DISTRONIC
OverrideDISTRONIC is no longer controlling the speed of the vehicle.XTake your foot off the accelerator pedal.230Display messagesOn-board computer and displays

Display messagesPossible causes/consequences and M SolutionsDISTRONIC
InoperativeDISTRONIC is defective or the display has failed.XVisit a qualified specialist workshop.DISTRONIC
Currently
Unavailable See
Operator's ManualDISTRONIC is deactivated and is temporarily inoperative if:
R the DISTRONIC cover in the radiator grill is dirty.
R its function is impaired due to heavy rain, snow or fog.
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 radar sensor system has not detected any vehicles or
stationary objects, e.g. traffic signs, for a long time.
R the system is outside the operating temperature range.
DISTRONIC becomes available again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensors are fully available again.
R the system is within the operating temperature range.
If the display message continues to be displayed:XClean the DISTRONIC cover in the radiator grill ( Y page 291).XRestart the engine.GWARNING
DISTRONIC cannot take weather conditions into account. Switch off DISTRONIC or do not turn
it on if the sensor is dirty or visibility is diminished as a result of snow, rain or fog. The distance
control may be impaired even before the system is able to detect a dirty sensor. The DISTRONIC
Currently Unavailable See Operator's Manual message will be displayed in the
multifunction display and DISTRONIC will be turned off.
Tires
GWARNING
Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may
lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up
and possibly a fire.
GWARNING
Follow recommended tire inflation pressures.
Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect
handling and fuel economy, and are more likely to fail from being overheated.
Display messages231On-board computer and displaysZ

Display messagesPossible causes/consequences and M SolutionsCheck
Tire(s)GRisk of accident
The tire pressure in one or more tires has dropped significantly.
The wheel position is displayed in the multifunction display.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XCorrect the tire pressure ( Y page 331).XIf necessary, change a wheel ( Y page 346).Caution:
Tire DefectGRisk of accident
The tire pressure in one or more tires has dropped suddenly. The
wheel position is displayed in the multifunction display.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change a wheel ( Y page 346).Tire Pressure(s)
Please CorrectThe tire pressure is too low in at least one of the tires or the tire
pressure difference between the wheels is too great.XCheck the tire pressures at the next opportunity. If necessary,
correct the tire pressure ( Y page 331).XRestart the tire pressure monitor ( Y page 333).Tire Pressure
Monitor
Wheel Sensor
MissingThere is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.XHave the defective tire pressure sensor replaced at a qualified
specialist workshop.Tire Pressure
Monitor
Currently
UnavailableDue to a source of radio interference, no signals can be received
from the wheel sensors. The tire pressure monitor is temporarily
malfunctioning.XDrive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved.h
Tire Pressure
Caution: Tire
DefectGRisk of accident
The tire pressure in one or more tires has dropped suddenly.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XIf necessary, change a wheel ( Y page 346).Display messages233On-board computer and displaysZ