2012 MERCEDES-BENZ R-CLASS FAMILY TOURER fuel cap

Emergency spare wheelStorage location ............................ 297
Stowing .......................................... 298
Emergency Tensioning Devices
Function ........................................... 55
Safety guidelines ............................. 39
Emissions purification
Service and warranty information ....21
Engine
Check Engine warning lamp ........... 244
Display message ............................ 225
Emergency starting ........................317
Engine number ............................... 354
Irregular running ............................ 149
Starting problems ..........................149
Starting the engine with the
SmartKey ....................................... 146
Starting with KEYLESS-GO .............147
Switching off .................................. 163
Engine electronics
Problem (malfunction) ...................149
Engine emergency stop .................... 319
Engine oil Adding ........................................... 284
Additives ........................................ 358
Checking the oil level ..................... 283
Display message ............................ 227
Filling capacity ............................... 355
Notes about oil grades ................... 358
Notes on oil level/consumption ....283
Viscosity ........................................ 359
ESP ®
(Electronic Stability
Program) 4ETS ................................................ 66
Deactivating/activating ...................66
Display message ............................ 214
Function/notes ................................ 66
Important safety information ...........66
Trailer stabilization ........................... 67
Warning lamp ................................. 241
Exhaust check ................................... 166
Exhaust tail pipe (cleaning
instructions) ...................................... 292
Exterior lighting see Lights Exterior mirrors
Adjusting ....................................... 110
Dipping (automatic) .......................111
Folding in/out (automatically) .......110
Folding in/out (electrically) ...........110
Folding in when locking (on-board
computer) ...................................... 209
Out of position (troubleshooting) ...111
Setting ........................................... 110
Storing settings (memory
function) ........................................ 112
Storing the parking position ..........111
F
Filler cap see Fuel filler flap
First-aid kit ......................................... 296
Flat tire Changing a wheel/mounting the
spare wheel ................................... 303
MOExtended run-flat system .........309
Preparing the vehicle .....................299
Raising the vehicle .........................305
TIREFIT kit ...................................... 299
see Emergency spare wheel
Floormat ............................................. 279
Front fog lamp Switching on/off ........................... 116
Front fog lamps ................................. 116
Display message ............................ 224
Front windshield
see Windshield
Fuel
Additives ........................................ 357
Calling up the range .......................211
Consumption statistics ..................210
Displaying the current
consumption .................................. 211
Driving tips .................................... 165
Fuel gauge ....................................... 29
Important safety notes ..................356
Premium-grade unleaded gasoline . 356
Problem (malfunction) ...................160
Refueling ........................................ 156
Specifications ................................ 356
Tank content/reserve fuel .............355
Index9

Fuel filler flapEmergency release ........................158
Opening/closing ............................ 158
Fuel filter (display message) ............ 228
Fuel level Calling up the range (on-board
computer) ...................................... 211
Fuel tank
Capacity ........................................ 355
Problem (malfunction) ...................160
Fuse allocation chart (vehicle tool
kit) ...................................................... 296
Fuses Allocation chart ............................. 317
Before changing ............................. 317
Dashboard fuse box .......................318
Engine emergency stop .................319
Fuse box in the cargo
compartment ................................. 318
Fuse box in the engine
compartment ................................. 318
Important safety notes ..................317
G
Garage door opener Clearing the memory .....................278
Notes ............................................. 275
Opening/closing the garage door ..278
Programming (button in the rear-
view mirror) ................................... 276
Gasoline ............................................. 157
Gear or selector lever (cleaning
guidelines) ......................................... 293
Genuine Mercedes-Benz parts ......... 352
Glove box ........................................... 249
GTW (Gross Trailer Weight)
(definition) ......................................... 344
H
Handbrake see Parking brake
Hazard warning lamps ...................... 117
Headlamp cleaning system Notes ............................................. 360
Headlamp delayed switch-off
see Exterior lighting delayed switch-off
Headlamps
Adding fluid to cleaning system .....285
Cleaning system (function) ............117
Misting up ...................................... 118
see Automatic headlamp mode
Head restraints
Adjusting ......................................... 99
Adjusting (electrically) .....................99
Adjusting (manually) ........................99
Adjusting (rear) .............................. 100
Installing/removing (rear) ..............100
Luxury .............................................. 99
see NECK-PRO head restraints/
NECK-PRO luxury head restraints
Heating
see Climate control
High-beam headlamps
Changing bulbs .............................. 122
Display message ............................ 223
Switching on/off ........................... 117
Hill start assist .................................. 147
Hood Closing ........................................... 283
Display message ............................ 235
Opening ......................................... 282
Hydroplaning ..................................... 168
I
Ignition lock see SmartKey positions
Immobilizer .......................................... 68
Indicator and warning lamps DISTRONIC .................................... 245
Indicator lamps
see Warning and indicator lamps
Insect protection on the radiator .... 283
Instrument cluster Overview .......................................... 29
Selecting the language (on-board
computer) ...................................... 206
Settings ......................................... 205
Warning and indicator lamps ...........30
Instrument cluster lighting ................ 29
Instrument lighting see Instrument cluster lighting
Interior lighting
Automatic control ..........................119
10Index

SeatFolding down the 2nd row of
seats .............................................. 254
Important safety notes ....................97
Resetting the 2nd row of seats ......256
Resetting the 3rd row of seats ....... 256
Seat belts
Adjusting the driver's and front-
passenger seat belt .........................54
Adjusting the height ......................... 54
Belt force limiters ............................ 55
Cleaning ......................................... 293
Correct usage .................................. 52
Emergency Tensioning Devices ........ 55
Fastening ......................................... 53
Important safety guidelines .............51
Releasing ......................................... 54
Safety guidelines ............................. 39
Special seat belt retractor ...............58
Switching belt adjustment on/off
(on-board computer) ......................209
Warning lamp ................................. 238
Warning lamp (function) ................... 54
Seats
Adjusting (electrically) .....................98
Adjusting (second and third rows) . 101
Adjusting the 4-way lumbar
support .......................................... 105
Adjusting the head restraint ............99
Cleaning the cover .........................293
Correct driver's seat position ........... 96
Folding down the 3rd row of seats . 255
Folding the rear bench seat
forwards/back ............................... 253
Multicontour seat .......................... 105
Seat heating problem ....................106
Seat ventilation problem ................107
Storing settings (memory
function) ........................................ 112
Switching seat heating on/off .......106
Switching the seat ventilation on/
off .................................................. 106
Securing hooks .................................. 258
Sensors (cleaning instructions) ....... 291
Service see ASSYST PLUS service interval
display Service interval display
Displaying service messages .........287
Hiding service messages ...............287
Notes ............................................. 287
Service messages ..........................287
Service products
Brake fluid ..................................... 359
Capacities ...................................... 355
Coolant (engine) ............................ 359
DEF special additives .....................357
Engine oil ....................................... 358
Fuel ................................................ 356
Important safety notes ..................354
Refrigerant (air-conditioning
system) .......................................... 359
Washer fluid ................................... 360
Settings
Factory (on-board computer) .........205
On-board computer .......................205
Setting the air distribution ............... 138
Setting the airflow ............................ 138
Side impact air bag ............................. 42
Side marker lamp (display
message) ............................................ 224
Side marker lamps (changing
bulbs) ................................................. 123
Side windows Convenience closing feature ............88
Convenience opening feature ..........87
Hinged side windows .......................87
Important safety information ...........86
Opening/closing .............................. 86
Problem (malfunction) .....................89
Resetting ......................................... 89
Sliding sunroof
Important safety notes ....................89
Opening/closing .............................. 90
Problem (malfunction) .....................92
Resetting ......................................... 90
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery .......................76
Changing the programming .............75
Checking the battery .......................76
Convenience closing feature ............88
Convenience opening feature ..........87
Display message ............................ 236Index15

obtained from oil companies, e.g. at gas
stations.
Refueling
Fuel filler flap
The fuel filler flap is unlocked or locked
automatically when you open or close the
vehicle with the SmartKey or using KEYLESS-
GO.
The position of the fuel filler cap is displayed
in the instrument cluster 8. The arrow
next to the filling pump indicates the side of
the vehicle.
:To open the fuel filler flap;To insert the fuel filler cap=Fuel type?Tire pressure table
Opening
XSwitch off the engine.XRemove the SmartKey from the ignition
lock.
KEYLESS-GO: open the driver’s door. This
switches the ignition to position 0, which
corresponds to having removed the
SmartKey. The driver’s door can be closed
again.XPress the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.XOpen the fuel filler flap.XTurn the fuel filler cap counter-clockwise
and remove it.XInsert the fuel filler cap into the holder
bracket on the inside of filler flap ;.XCompletely insert the pump nozzle into the
filler neck and refuel.XOnly fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damage the
fuel system.
Closing
XReplace the fuel filler cap and turn it
clockwise. The fuel filler cap audibly
engages.XClose the fuel filler flap.
i If you drive with the fuel filler cap open,
the reserve fuel warning lamp flashes. In
addition, the ! (USA only) or ;
(Canada only) Check Engine warning lamp
may light up. A message appears in the
multifunction display ( Y page 228).
For further information on warning and
indicator lamps in the instrument cluster,
see ( Y page 244).
i Close the fuel filler flap before locking the
vehicle. A locking pin otherwise prevents
the fuel filler flap from closing after the
vehicle has been locked.
Fuel filler flap emergency release
GWARNING
Avoid contact with the vehicle walls as they
may contain sharp edges. Otherwise, you
could injure yourself while releasing the fuel
filler flap.
The emergency release is located in the cargo
compartment behind the side trim on the
right-hand side, when viewed in the direction
of travel.
158RefuelingDriving and parking

DEF
Important notes on use
To function properly, BlueTEC exhaust gas
aftertreatment must be operated with the
reducing agent DEF. Adding DEF is one of the
tasks performed during maintenance. Under
normal operating conditions, a tank of DEF
lasts until the next service due date.
When the DEF supply has almost run out, the
Check Additive See Operator's
Manual message is shown in the
multifunction display.
When the DEF supply sinks to a minimum
level, the Remaining Starts: 16 message
is shown in the multifunction display.
When the Remaining Starts: 16 message
is shown in the multifunction display, you can
start the engine 16 more times. If DEF is not
added, it is then not possible to start the
engine again. Fill the DEF tank with about
1 gal (3.8 l) DEF or have the DEF tank refilled
at a qualified specialist workshop.
Use the special DEF refill bottle when filling
between maintenance intervals. Contact an
authorized Mercedes-Benz Center with any
questions or, if necessary, contact Roadside
Assistance ( Y page 22).
Further information about BlueTEC exhaust
gas aftertreatment and DEF is available at any
authorized Mercedes-Benz Center.
Adding DEF
GWARNING
Make sure
R DEF does not come into contact with skin,
eyes, or clothing
R to keep DEF out of the reach of children
If you and/or others have come into contact
with DEF:
R If DEF has gotten into contact with eyes,
flush with plenty of water immediately and
seek medical help.
R Clean affected skin immediately with plenty
of water.
R If DEF was swallowed, rinse mouth
immediately with plenty of water and drink
plenty of water. Consult a physician.GWARNING
If you open the DEF tank cap at high
temperatures, ammonia vapors can be
released.
Ammonia vapors have a pungent odor and are
particularly irritating to:
R skin
R mucous membranes
R eyes
You may experience a burning sensation in
your eyes, nose and throat, as well as
coughing and watering of the eyes.
Do not inhale any ammonia vapors that may
be released. Only refill the DEF tank in well
ventilated areas.
! Only use DEF that complies with
ISO 22241. Do not add any special
additives to DEF and do not thin DEF with
water. This could destroy the BlueTEC
exhaust gas aftertreatment.
If the outside temperature is lower than
Ò 11 †, damage may occur when topping up.
If DEF is frozen and there is an active warning
indicator, topping up may not be possible.
Park the vehicle in a warmer place, e.g. in a
garage, until DEF has become fluid again.
Filling is then possible again. Alternatively,
have the DEF tank refilled at a qualified
specialist workshop.
! Rinse surfaces that have come into
contact with DEF immediately with water or
remove DEF using a damp cloth and cold
water. If the DEF has already crystallized,
Refueling161Driving and parkingZ

use a sponge and cold water to clean it. DEF
residues crystallize after time and
contaminate the affected surfaces.
! DEF is not a fuel additive and must not be
added to the fuel tank. If DEF is added to
the fuel tank, this can lead to engine
damage.
i If you are adding between maintenance
intervals, add approximately 1 gallon (3.8 l)
of DEF to the DEF tank. One gallon (3.8 l)
of DEF is approximately 2 DEF refill bottles.
For further information on DEF, see:
( Y page 357).
The DEF filler neck is under the cargo
compartment floor.XSwitch off the ignition.XOpen the tailgate.XLift up the trunk floor ( Y page 296).XRemove lug wrench ; and ratchet wrench
= if applicable.XTurn DEF cap : counter-clockwise and
remove it.XTurn DEF filler cap ? counter-clockwise
and open it.
Filler cap ? is secured with a plastic strap.XUnscrew the covering cap from DEF refill
bottle A.XPlace DEF refill bottle A on the filler neck
as shown and screw on clockwise hand-
tight.
! Only screw on the DEF refill bottle hand-
tight. It could otherwise be damaged.
XPress DEF refill bottle A down.
The DEF tank is filled. This may take up to
one minute.
i If the DEF refill bottle is no longer pressed
down, the filling process stops and the
partially emptied bottle can be removed.
XRelease DEF refill bottle A.XTurn DEF refill bottle A counter-clockwise
and remove it.XPlace DEF filler cap ? on the filler neck and
turn it clockwise.162RefuelingDriving and parking

Display messagesPossible causes/consequences and M Solutions8
Reserve FuelThe fuel level has dropped into the reserve range.XRefuel at the nearest gas station.CThere is only a very small amount of fuel in the fuel tank.XRefuel at the nearest gas station without fail.8
Gas Cap OpenThe fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.XCheck that the fuel filler cap is correctly closed.
If the fuel filler cap is not correctly closed:
XClose the fuel filler cap.
If the fuel filler cap is correctly closed:
XVisit a qualified specialist workshop.8
Ultra Low-sulfur
Diesel Fuel OnlyVehicles with a diesel engine: the fuel level has fallen below the
reserve range.XRefuel at the nearest gas station.XOnly use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM).¸
Replace air filterVehicles with a diesel engine: the engine air filter is dirty and must
be replaced.XVisit a qualified specialist workshop.·
Clean Fuel FilterVehicles with a diesel engine: there is water in the fuel filter. The
water must be drained off.XVisit a qualified specialist workshop.Ø
Check Additive See
Operator's ManualThe DEF tank is empty.XHave the DEF tank filled as soon as possible at a qualified
specialist workshop ( Y page 161).Ø
Remaining Starts:
16The DEF level has fallen to a minimum.XHave the DEF tank filled immediately at a qualified specialist
workshop. ( Y page 161)228Display messagesOn-board computer and displays

EngineProblemPossible causes/consequences and M Solutions! (USA only)
; (Canada only)
The yellow Check
Engine warning lamp
lights up while the
ignition is switched on
with the engine
running.There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system (for vehicles with a gasoline engine)
R in the fuel system
The emission limit values may be exceeded and the engine may
be running in emergency mode.XHave the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you are required by law to immediately visit a
qualified specialist workshop as soon as the yellow Check
Engine warning lamp lights up. If in doubt, check whether such
legal regulations apply in the state/province in which you are
currently driving.
Vehicles with a diesel engine: the fuel tank has been run dry
( Y page 160).XStart the engine three to four times after refueling.
If the yellow Check Engine warning lamp goes out, emergency
running mode is canceled. The vehicle need not be checked.The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the !
(USA only)/ ;
(Canada only) yellow
Check Engine warning
lamp may light up.The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.XObserve the additional display messages in the multifunction
display.XCheck that the fuel filler cap is correctly closed.XIf the fuel filler cap is not correctly closed: close the fuel filler
cap.XIf the fuel filler cap is closed: visit a qualified specialist
workshop.The yellow reserve fuel
warning lamp lights up
while the engine is
running.The fuel level has dropped into the reserve range.XRefuel at the nearest gas station.244Warning and indicator lamps in the instrument clusterOn-board computer and displays