spare tire MERCEDES-BENZ R-Class 2012 W251 Owner's Manual

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

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

GWARNING
If the BAS malfunctions, the brake system still
functions, but without the additional brake
boost available that the BAS would normally
provide in an emergency braking maneuver.
Therefore, the braking distance may increase.
ESP ®
(Electronic Stability Program)
Important safety notes
i See the "Important safety notes" section
( Y page 64).
If ESP ®
detects that the vehicle is deviating
from the direction desired by the driver, one
or more wheels are braked to stabilize the
vehicle. If necessary, the engine output is also
modified to keep the vehicle on the desired
course within physical limits. ESP ®
assists
the driver when pulling away on wet or
slippery roads. ESP ®
can also stabilize the
vehicle during braking.
If ESP ®
intervenes, the ÷ ESP®
warning
lamp flashes in the instrument cluster.
GWARNING
Under no circumstances should you
deactivate ESP ®
when the ÷ ESP®
warning lamp in the instrument cluster
flashes. Proceed as follows:
R when driving off, apply as little throttle as
possible.
R while driving, ease up on the accelerator
pedal.
R adapt your speed to suit the prevailing road
and weather conditions.
Failure to observe these guidelines could
cause the vehicle to skid. ESP ®
cannot
prevent accidents resulting from excessive
speed.
! Only operate the vehicle for a maximum
of ten seconds on a brake test
dynamometer. Switch off the ignition.
Application of the brakes by ESP ®
may
otherwise destroy the brake system.
! Function or performance tests may only
be performed on a 2-axle dynamometer. If
you wish to operate the vehicle on such a
dynamometer, please consult an
authorized Mercedes-Benz Center
beforehand. You could otherwise damage
the drive train or the brake system.
i Only use wheels with the recommended
tire sizes. Only then will ESP ®
function
properly.
4ETS (Electronic Traction System)
i Observe the "Important safety notes"
section ( Y page 64).
Traction control is part of ESP ®
.
Traction control brakes the drive wheels
individually if they spin. This enables you to
pull away and accelerate on slippery surfaces,
for example if the road surface is slippery on
one side. In addition, more drive torque is
transferred to the wheel or wheels with
traction.
Traction control remains active if you
deactivate ESP ®
.
GWARNING
Traction control cannot reduce the risk of an
accident if you drive too fast. Traction control
cannot override the laws of physics.
Deactivating/activating ESP ®
i
Observe the "Important safety notes"
section ( Y page 64).
GWARNING
ESP ®
should not be deactivated during
normal driving other than in the
circumstances described below. Disabling
the system will reduce vehicle stability in
driving maneuvers.
Do not deactivate ESP ®
when the emergency
or spare wheel is mounted.
66Driving safety systemsSafety

the vehicle, resulting in loss of consciousness
and even death.
To assure sufficient fresh air ventilation, open
a window slightly on the side of the vehicle
not facing the wind.
At the onset of winter, have your vehicle
winterproofed at a qualified specialist
workshop, e.g. at an authorized Mercedes-
Benz Center.
i Vehicles with a diesel engine: do not
cover the radiator, e.g. with a protective
cover. The measuring function of the
Onboard Diagnosis System may otherwise
provide inaccurate values. Some of these
values are required by law and must
therefore always be accurate.
Winter tires
At temperatures below 45 ‡(+7 †), use
winter tires or all-season tires. Both types of
tire are identified by the M+S marking.
Only winter tires bearing the i snowflake
symbol in addition to the M+S marking
provide the best possible grip in wintry road
conditions. Only these tires will allow driving
safety systems such as ABS and ESP ®
to
function optimally in winter, as these tires
have been designed specifically for driving on
snow.
Use M+S tires of the same make and tread on
all wheels to maintain safe handling
characteristics.
GWARNING
M+S tires with a tread depth of less than 1
/ 6
inch (4 mm) must be replaced immediately.
They are no longer suitable for use in winter.
Always observe the maximum permissible
speed specified for the M+S tires you have
mounted.
Once you have mounted the winter tires:XCheck the tire pressures ( Y page 329).XRestart the tire pressure monitor
( Y page 331).GWARNING
If you use your spare wheel when M+S tires
are mounted on the other wheels, be aware
that the difference in tire characteristics
impairs cornering ability and reduces driving
stability. Adapt your driving style accordingly.
Have the spare wheel replaced by a normal
wheel with an M+S tire at the nearest
Mercedes-Benz Center.
Snow chains
For safety reasons, Mercedes-Benz
recommends that you only use snow chains
which have been specially approved for your
vehicle by Mercedes-Benz, or are of a
corresponding standard of quality.
! Vehicles with the Adaptive Damping
System (ADS): do not drive in ADS SPORT
mode if snow chains have been mounted.
The vehicle may otherwise be damaged.
! There is not enough space for snow
chains on some wheel sizes. Observe the
information under "Tires and wheels" in the
"Technical Data" section to avoid damage
to the vehicle or the wheels.
R Only use snow chains when driving on
roads completely covered by snow. Do not
exceed the maximum permissible speed of
30 mph (50 km/h). Remove the snow
chains as soon as possible when you are no
longer driving on snow-covered roads.
R Local regulations may restrict the use of
snow chains. Applicable regulations must
be observed if you wish to mount snow
chains.
R Snow chains must not be mounted on
emergency spare wheels.
Driving tips169Driving and parkingZ

Driving systemsProblemPossible causes/consequences and M Solutions·
The red distance
warning lamp lights up
while the vehicle is in
motion. A warning tone
also sounds.GRisk of accident
The warning is issued if you approach a stationary vehicle or a
vehicle driving ahead of you at too high a speed.
XBe prepared to brake immediately.XPay careful attention to the traffic situation. You may have to
brake or take evasive action.
More information about DISTRONIC (Y page 173) and the distance
warning signal ( Y page 68).
Tires
ProblemPossible causes/consequences and M Solutionsh
USA only:
The yellow tire pressure
monitor warning lamp
(pressure loss/
malfunction) is lit.GRisk of accident
The tire pressure monitor has detected a loss of pressure in at
least one of the tires.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XObserve the additional display messages in the multifunction
display.XCheck the tire pressure. If necessary, correct the tire pressure
( Y page 331).XIf necessary, change a wheel ( Y page 346).h
USA only:
The yellow tire pressure
monitor warning lamp
(pressure loss/
malfunction) flashes for
60 seconds and then
remains lit.The tire pressure monitor is defective.XObserve the additional display messages in the multifunction
display.XVisit a qualified specialist workshop.GWARNING
Each tire, including the spare (if provided), should be checked every other week when cold and
inflated to the inflation pressure recommended by the vehicle manufacturer on the Tire and
Loading Information placard on the driver's door B-pillar or, if available, the tire inflation pressure
label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the size
Warning and indicator lamps in the instrument cluster245On-board computer and displaysZ

XAttach hook = to upper seal ? in the
cargo compartment.
Vehicles with a TIREFIT kit
XLift the trunk floor up ( Y page 296).:Lug wrench;Towing eye=Alignment bolt?JackAFolding wheel chockBFuse allocation chartCRatchet wrench
Vehicles with a collapsible spare wheel
XLift the trunk floor up ( Y page 296).:Lug wrench;Tire inflation compressor=Instructions on the installation position of
the vehicle tool kit holder?Fuse allocation chartAAlignment boltBFolding wheel chockCTowing eyeDWheel boltsEStowage wellFRatchet wrenchGJack
Collapsible spare wheel
Removing the collapsible spare wheel
The collapsible spare wheel can be found in
the stowage well under the trunk floor.
XLift the trunk floor up ( Y page 296).XRemove the jack from the tool holder
( Y page 296).Where will I find...?297Breakdown assistance

XTurn retaining screw : counter-clockwise
and out of tool holder = and remove it.
i
If retaining screw : does not come out
immediately, turn tool holder = slightly
counter-clockwise.
Retaining screw : can then be unscrewed
with ease.
XTurn tool holder = approximately 180°, so
that the tire inflation compressor points
backwards.XRemove tool holder = from collapsible
spare wheel ;.XRemove collapsible spare wheel ; from
the emergency spare wheel well.
For further information on changing a wheel
and mounting the spare wheel, see
( Y page 299).
Stowing a used collapsible spare wheel
Take the following steps to stow a used
collapsible spare wheel. It will otherwise not
fit in the spare wheel well. Mercedes-Benz
recommends that you have this work carried
out at a qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center.
! Only place the collapsible spare wheel in
the vehicle when it is dry. Otherwise,
moisture may get into the vehicle.
XUnscrew the valve cap from the valve.XIf possible, unscrew the valve insert from
the valve and release the air.
i Fully deflating the tire can take a few
minutes.
XScrew the valve insert back into the valve.XScrew the valve cap back on.
In the spare wheel well, there are two
guides : to keep the collapsible spare wheel
in place.
XLay collapsible spare wheel ; in the
emergency spare wheel well.
i Make sure that collapsible spare
wheel ; is positioned on guides :
precisely.
XLay the tool holder in collapsible spare
wheel ; so that the electric air pump is
pointing towards the tailgate (Y page 296).XTurn the tool holder approximately 180°,
so that the electric air pump points
forwards.
The tool holder should now be positioned
in accordance with the instructions on the
installation position.XTurn the retainer screw on the collapsible
spare wheel clockwise into the tool holder
as far as it will go.XStow the jack in the vehicle tool kit.298Where will I find...?Breakdown assistance

Flat tire
Preparing the vehicle
Your vehicle may be equipped with a
collapsible spare wheel or MOExtended tires
(tires with run-flat properties) ( Y page 309).
i Vehicle preparation is not necessary on
vehicles with MOExtended tires.
i Vehicles equipped with MOExtended tires
are not equipped with a TIREFIT kit at the
factory. It is therefore recommended that
you additionally equip your vehicle with a
TIREFIT kit if you mount tires that do not
feature run-flat properties, e.g. winter tires.
A TIREFIT kit can be obtained from an
authorized Mercedes-Benz Center.
XVehicles with the AIRMATIC package: make
sure that highway level is selected
( Y page 180).XStop the vehicle as far away as possible
from traffic on solid, non-slippery and level
ground.XSwitch on the hazard warning lamps.XFirmly depress the parking brake.XBring the front wheels into the straight-
ahead position.XMove the DIRECT SELECT lever to P.XSwitch off the engine.XVehicles without KEYLESS-GO: remove
the SmartKey from the ignition lock.XVehicles with KEYLESS-GO: open the
driver's door.
The on-board electronics have status 0,
which is the same as the SmartKey having
been removed.XVehicles with KEYLESS-GO: remove the
Start/Stop button from the ignition lock
( Y page 145).XAll occupants must get out of the vehicle.
Make sure that they are not endangered as
they do so.XMake sure that no one is near the danger
area while a wheel is being changed.Anyone who is not directly assisting in the
wheel change should, for example, stand
behind the barrier.XGet out of the vehicle. Pay attention to
traffic conditions when doing so.XClose the driver's door.
i Only operate the tire inflation compressor
using the socket in the footwell of the
second row of seats ( Y page 268), even if
the ignition is turned off.
An emergency cut-off ensures that the on-
board electrical system voltage does not
drop too low. If the on-board electrical
system voltage is too low, power to the
sockets is automatically cut off. This
ensures that there is sufficient power to
start the engine.
TIREFIT kit
Using the TIREFIT kit
You can use the TIREFIT kit to seal small
punctures, particularly those in the tire tread.
You can use TIREFIT at outside temperatures
down to -4 ‡ (-20 †).
GWARNING
TIREFIT is a limited repair device. TIREFIT
cannot be used for cuts or punctures larger
than approximately 0.16 in (4 mm) and tire
damage caused by driving with extremely low
tire inflation pressure, or on a flat tire, or a
damaged wheel.
Do not drive the vehicle under such
circumstances.
Contact the nearest authorized Mercedes-
Benz Center for assistance or call Roadside
Assistance.
XDo not remove any foreign objects which
have penetrated the tire, e.g. screws or
nails.XRemove the tire sealant bottle, the
accompanying "max. 80 km/h" sticker and
the tire inflation compressor from theFlat tire299Breakdown assistanceZ

XStop after driving for approximately ten
minutes and check the tire pressure with
the tire inflation compressor.GWARNING
If tire inflation pressure has fallen below
130 kPa (1.3 bar/26 psi) do not continue to
drive the vehicle.
Park your vehicle safely away from the
roadway and contact the nearest authorized
Mercedes-Benz Center or Roadside
Assistance.
Have the damaged tire replaced.
XCorrect the tire pressure if it is at least
130 kPa (1.3 bar/20 psi) (for the required
values, see the Tire and Loading
Information placard on the driver's side
B-pillar or the tire pressure table inside the
fuel filler flap).XTo increase the tire pressure: switch on
the tire inflation compressor.
TIREFIT kit version 1
XTo reduce the tire pressure (version 1):
open pressure release screw F on
pressure gauge G.
TIREFIT kit version 2
EPressure release buttonFPressure gaugeXTo reduce the tire pressure (version 2):
press pressure release button E on the
filler hose.XStow the tire sealant bottle and the tire
inflation compressor.XDrive to the nearest workshop and have the
tire changed there.XHave the tire sealant bottle replaced as
soon as possible at a qualified specialist
workshop, e.g. at an authorized Mercedes-
Benz Center.HEnvironmental note
Have the used tire sealant bottle disposed of
professionally, e.g. at an authorized
Mercedes-Benz Center.
XHave the tire sealant bottle replaced every
four years at a qualified specialist
workshop, e.g. an authorized Mercedes-
Benz Center.
Changing a wheel and mounting the
spare wheel
Preparing the vehicle
GWARNING
The wheel and tire size of the emergency
spare wheel/spare wheel may differ to that of
the damaged wheel. When using an
emergency spare wheel/spare wheel the
Flat tire303Breakdown assistanceZ

handling characteristics of the vehicle may
change.
Adapt your style of driving accordingly.
Never operate the vehicle with more than one
emergency spare wheel/spare wheel that
differs in size.
Only use an emergency spare wheel/spare
wheel of a differing size briefly and do not
switch off ESP ®
.
When using an emergency spare wheel, you
must not exceed the maximum speed of
50 mph (80 km/h).GWARNING
Have the emergency spare wheel/spare
wheel replaced with a new wheel as soon as
possible at a qualified specialist workshop
which has the necessary specialist knowledge
and tools to carry out the work required.
Mercedes-Benz recommends that you use an
authorized Mercedes-Benz Center for this
purpose. In particular, work relevant to safety
or on safety-related systems must be carried
out at a qualified specialist workshop.
i Vehicles without a spare wheel/
emergency spare wheel are not equipped
with a tire-change tool kit at the factory. For
more information on which tools are
required to perform a wheel change on your
vehicle, e.g. wheel chock, lug wrench or
alignment bolt, consult an authorized
Mercedes-Benz Center.
XPrepare the vehicle as described
( Y page 299).XIf a trailer is coupled to the vehicle,
uncouple it.XRemove the following items (depending on
the vehicle's equipment) from the stowage
well under the trunk floor:
R the emergency spare wheel 35
R the wheel bolts for the emergency spare
wheel 35
R the jackRthe ratchet wrench
R the lug wrench
R the folding wheel chock
R the alignment bolt
R the tire inflation compressor 35XSecure the vehicle to prevent it from rolling
away.
Securing the vehicle to prevent it from
rolling away
GWARNING
Only jack up the vehicle on level ground or on
slight inclines/declines. The vehicle could
otherwise fall off the jack and injure you or
others.
If your vehicle is equipped with a wheel chock,
it can be found in the vehicle tool kit
( Y page 296).
The folding wheel chock is an additional
securing measure to prevent the vehicle from
rolling away, for example when changing a
wheel.
XFold both plates upwards :.XFold out lower plate ;.XGuide the lugs on the lower plate fully into
the openings in base plate =.35
Vehicles with an emergency spare wheel.304Flat tireBreakdown assistance