warning light MERCEDES-BENZ R320 2010 W251 Owner's Manual

Symbols
Trademarks ®
:
R AdBlue ®
is a registered trademark of the
German Association of the Automotive
Industry (VDA).
R BabySmart TM
is a trademark of Siemens
Automotive Corp.
R Bluetooth ®
is a registered trademark of
Bluetooth SIG Inc.
R ESP ®
and PRE-SAFE ®
are registered
trademarks of Daimler.
R HomeLink ®
is a registered trademark of
Prince, a Johnson Controls Company.
R SIRIUS and related marks are trademarks
of SIRIUS XM Radio Inc.
The following symbols are found in this
Operator’s Manual: G
Warning!
Warning notices draw your attention to
hazards that may endanger your health or life,
or the health or life of others.
! Highlights hazards that may result in
damage to your vehicle.
i Helpful hints or further information you
may find useful.
X This symbol points to instructions
for you to follow.
X A number of these symbols
appearing in succession indicates
a multiple-step procedure.
Y page This symbol tells you where to look
for further information on a topic.
YY This continuation symbol marks a
warning or procedure which is
continued on the next page.
Display Text in displays, such as the control
system, are printed in the type
shown here.
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Armrest, rear

Storage compartment .................... 199
Ashtrays ............................................. 204
Aspect ratio (tires) ............................ 249
Audio/DVD menu .............................. 128
Auto-dimming rear view mirrors ........ 94
Automatic central locking ..........74, 137
Automatic headlamp mode ................98
Automatic interior lighting control ..102
Automatic locking when driving ......137
Automatic shift program ..................120
Automatic transmission ................... 115
Automatic shift program ................120
Emergency operation (limp-home
mode) ............................................ 121
Gear range indicator ......................120
Gear ranges ................................... 119
Gear selector lever ........................116
Hill-start assist system .................. 153
Kickdown ....................................... 119
One-touch gearshifting ..................120
Program mode indicator ................120
Program mode selector switch
(automatic shift program) ..............120
Shifting procedure ......................... 118
Steering wheel gearshift control .... 121
Towing a trailer .............................. 119
Transmission position indicator ..... 118
Transmission positions .................. 118
AUX socket ........................................ 198
Axle oils .............................................. 351B
BabySmart™
Air bag deactivation system ............. 45
Self-test

........................................... 47
Backrest
see Seats
Backup lamps
Messages in the multifunction
display ........................................... 295
Bar (air pressure unit) ....................... 249
BAS (Brake Assist System) ................. 64
Batteries, SmartKey
Checking condition ..........................73
Replacing ....................................... 310Battery, Vehicle
................................. 333
Charging ........................................ 335
Jump starting ................................. 336
Messages in the multifunction
display

................................... 282, 292
Bead (tire) .......................................... 249
Beverage holders see Cup holders
Bleeding the fuel system (diesel
engine) ............................................... 331
BlueTEC
AdBlue ®
tank ................................. 331
AdBlue ®
tank capacity ................... 351
Brake fluid
Checking level ............................... 227
Messages in the multifunction
display ........................................... 286
Brake lamps
Cleaning lenses ............................. 265
Brake pads
Messages in the multifunction
display ........................................... 285
Brakes ................................................ 253
Parking brake ........................ 114, 255
Warning lamp ................................. 301
Break-in period .................................. 220
Bug cover (Radiator) ......................... 224
Bulbs see Replacing bulbs C
CAC (Customer Assistance Center) ...23
California retail buyers and
lessees, important notice for .............21
Calls (phone) ...................................... 140
Can holders see Cup holders


Capacities and recommended
fuel/lubricants .................................. 350
Cargo compartment
Cargo net ....................................... 196
Cargo volume, expanding ..............189
Cover blind .................................... 194
Fuse box ........................................ 342
Hooks ............................................ 189
Tie-down rings ............................... 188
Cargo compartment cover blind ...... 194 Index
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Changing the set speed
.................144
Last stored speed .......................... 144
Lever ..............................................
143
Messages in the mutlifunction
display ........................................... 280
Resume function ............................ 144
Setting current speed .................... 143
Cup holders ........................................ 201
Curb weight ....................................... 249
Customer Assistance Center (CAC) ...23
Customer Relations Department .......23 D
Dashboard see Instrument cluster


Data recording ..................................... 23
Date, Setting ...................................... 134
Daytime running lamp mode ..............99
Switching on or off ......................... 134
Deep water
see Standing water
Defroster
Rear window .................................. 180
Windshield ............................. 168, 178
Delayed shut-off
Exterior lamps ................................ 135
Interior lighting .............................. 136
Department of Transportation
see DOT
Diesel engine
Preglow indicator lamp ....................29
Diesel fuel
see Fuel
Difficulties
While driving .................................. 113
With starting .................................. 111
Digital clock
see Clock
Digital speedometer .........................127
Dimensions (vehicle) see Vehicle specification
Direction of rotation (tires) ..............240
Displays
Digital speedometer ......................127
Distronic ........................................ 146
Maintenance service indicator .......261 Messages in the multifunction
display

........................................... 274
Multifunction display .....................125
Outside temperature .............127, 133
Symbol messages .......................... 285
Text messages ............................... 275
Trip computer ................................ 139
Vehicle status message memory ...130
Vehicle system settings ................. 130
Distronic ............................................ 145
Cleaning system sensor cover ....... 265
Control system .............................. 129
Distance warning function .............152
Distance warning
lamp ...................................... 147, 304
Driving with .................................... 151
Menu ............................................. 147
Messages in the multifunction
display ........................................... 280
Resume function ............................ 150
Sensor cover .................................. 265
Speed settings ............................... 149
Door control panel .............................. 33
Door handles ........................................ 33
Doors
Child safety locks ............................ 61
Locking/unlocking (KEYLESS-GO) ...71
Locking/unlocking (SmartKey) ........ 70
Messages in the multifunction
display ........................................... 289
Opening from inside ......................... 74
Remote door unlock (Tele Aid) ....... 212
Unlocking (Mechanical key) ........... 308
DOT (Department of
Transportation) .................................. 249
Drinking and driving .........................253
Driving
Abroad ........................................... 259
Hydroplaning ................................. 255
Instructions ........................... 110, 253
In winter ........................................ 252
Problems ....................................... 113
Safety systems ................................ 63
Systems ......................................... 142
Through standing water .................256
With Distronic ................................ 151
Driving and parking
Safety notes .................................. 110 Index
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Gross Vehicle Weight
see GVW
Gross Vehicle Weight Rating
see GVWR
GTW (Gross Trailer Weight) ..............249
GVW (Gross Vehicle Weight) ............249
GVWR (Gross Vehicle Weight
Rating) ................................................ 249H
Halogen headlamps see Headlamps


Hard plastic trim items, cleaning ....267
Hazard warning flasher ....................101
Headlamp cleaning system .............. 101
Headlamps
Active Bi-Xenon headlamps ............. 97
Automatic headlamp mode .............. 98
Bi-Xenon .................................. 97, 313
Cleaning lenses ............................. 265
Cleaning system ............................ 101
Daytime running lamp mode ............99
Delayed shut-off ............................ 135
Halogen ......................................... 313
High-beam flasher .........................101
High-beam headlamps ...................100
Low-beam headlamps ...................... 98
Replacing bulbs ............................. 312
Switch .............................................. 97
Headliner, cleaning and care of .......267
Head restraints .................................... 81
Adjustment ................................ 81, 83
NECK-PRO active front head
restraints ......................................... 53
NECK-PRO active front head
restraints, resetting ....................... 310
Heated steering wheel ........................93
Height adjustment
Seat belt outlet ................................ 50
Seats ............................................... 81
Vehicle level control ...................... 154
High-beam flasher ............................. 101
High-beam headlamps ..............100, 313
Indicator lamp .................................. 29
Hill-start assist system ..................... 153
Hinged quarter windows .................. 107Hood ...................................................
222
Messages in the multifunction
display

........................................... 288
Hooks ................................................. 189
Horn ...................................................... 27
HVAC see Climate control system
Hydroplaning ..................................... 255 I
Identification labels ..........................344
Identification number, vehicle
(VIN) ................................................... 345
Ignition ................................... 79, 80, 111
Immobilizer .......................................... 67
Indicator lamps see Lamps, indicator and warning


Infant and child restraint systems
see Children in the vehicle
Inflation pressure
see Tires, Inflation pressure
Infrared reflecting windshield .........217
Inside door handle .............................. 74
Instrument cluster ......................28, 122
Illumination .................................... 123
Lamps ............................................ 299
Multifunction display .....................125
Instrument lighting
see Instrument cluster, Illumination
Instrument panel
see Instrument cluster
Instruments and controls
see Cockpit
Interior lighting
Delayed shut-off ............................ 136
Emergency lighting ........................ 103
Front .............................................. 102
Front reading lamps ....................... 102
Rear ............................................... 103
Rear reading lamps ........................ 103
Interior rear view mirror .....................94
Auto-dimming rear view mirrors ....... 94
Interior storage spaces
see Storage compartments
Intermittent wiping
Rain sensor .................................... 10410
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J
Jack ..................................................... 272
Jump starting ..................................... 336K
Key, Mechanical
Loss of ............................................. 73
Unlocking/locking manually .......... 308
Key, SmartKey
Battery check lamp .......................... 73
Checking batteries ........................... 73
Factory setting
........................... 71, 72
Global locking (KEYLESS-
GO) .................................................. 73
Global locking (SmartKey) ................ 71
Global unlocking (KEYLESS-
GO) ............................................ 72, 73
Global unlocking
(SmartKey) ....................................... 71
Important notes on KEYLESS-GO .....72
Locking/unlocking ........................... 70
Loss of ............................................. 73
Messages in the multifunction
display ........................................... 289
Opening and closing the power
tilt/sliding sunroof or the
panorama roof ............................... 108
Opening and closing the windows . 108
Remote control ................................ 70
Replacing batteries ........................ 310
Restoring to factory setting ....... 71, 73
Selective setting ........................ 71, 73
Starter switch positions ................... 79
KEYLESS-GO
Starter switch positions ................... 80
Kickdown ........................................... 119
Kilopascal (air pressure unit) ...........249 L
Labels
Certification ................................... 344
Emission control information

......... 345 Tire and Loading Information
placard

........................................... 236
Tire inflation pressure ....................230
Lamps, exterior
Exterior lamp switch ........................ 97
Front .............................................. 313
Messages in the multifunction
display ........................................... 295
Rear ............................................... 313
Switching on/off .............................. 97
Lamps, indicator and warning
ABS .......................................... 28, 300
Brakes ..................................... 28, 301
Distance warning
lamp ........................ 28, 147, 152, 304
Engine malfunction .................. 29, 305
ESP ®
........................................ 28, 303
Fog lamps ........................................ 99
Front passenger front air bag off
(Canada only) .......................... 45, 307
Front passenger front air bag off
(USA only) ................................ 42, 307
Fuel tank reserve ..................... 29, 305
High-beam headlamps .............29, 100
Instrument cluster ...................28, 299
Low-beam headlamps ................ 29, 98
Low tire pressure/TPMS
malfunction telltale .................. 28, 306
Seat belt telltale ................29, 51, 302
SRS .................................... 29, 36, 303
Turn signals ..................................... 28
Language, selecting ..........................133
LATCH-type child seat anchors see Children in the vehicle
License plate lamps
Messages in the multifunction
display ........................................... 296
Replacing bulbs ............................. 314
Light alloy wheels, cleaning .............267
Lighter see Cigarette lighter
Lighting ................................................ 97
Daytime running lamp mode ............99
Exterior ............................................ 97
Interior ........................................... 102
Limp-home mode .............................. 121
Load index (tires) ......................245, 249 Index
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Decoupling ..................................... 259
Electrical connections
.................... 256
Towing ........................................... 258
Trailer hitch ................................... 256
Weights and ratings ....................... 256
Transfer case ..................................... 122
Transmission see Automatic transmission
Transmission fluid level .................... 225
Transmission gear selector lever see Gear selector lever
Transmission positions ....................118
Traveling abroad ............................... 259
Tread (tires) ....................................... 251
Tread depth (tires) ....................241, 251
Treadwear .......................................... 242
Treadwear indicators (tires) .... 241, 251
Trip computer menu .........................139
Trip odometer, resetting ................... 123
Turning off the engine ......................114
Turn signals ....................................... 100
Cleaning lenses ............................. 265
Indicator lamps ................................ 28
Messages in the multifunction
display ........................................... 298
TWR (Tongue Weight Rating) ........... 251U
Uniform Tire Quality Grading
Standards .................................. 242, 251
Units Selecting digital speedometer
display mode

................................. 132
Selecting speedometer/
odometer display mode ................. 132
Unleaded gasoline, premium ........... 353
Unlocking the vehicle
KEYLESS-GO .................................... 71
Manually ........................................ 308
SmartKey ......................................... 70
Upholstery, cleaning .........................268
Useful features .................................. 201 V
Vehicle
Battery ........................................... 333
Care ............................................... 262
Control system .............................. 123
Identification Number (VIN) ........... 344
Locking/unlocking

........................... 70
Lowering (wheel change) ...............329
Modifications and alterations,
Operating safety .............................. 22
Towing ........................................... 338
Unlocking/locking manually .......... 308
Vehicle dimensions
see Vehicle specification
Vehicle Identification Number
(VIN) ................................................... 344
Vehicle jack see Jack
Vehicle level control
see AIRMATIC
Vehicle lighting .................................... 97
Vehicle loading
Cargo tie-down rings ...................... 188
Cargo volume, expanding ..............189
Instructions .................................... 186
Load limit ....................................... 237
Roof rack ....................................... 187
Terminology ................................... 248
Vehicle maximum load on the tire ... 251
Vehicle specification
R 350 ............................................. 346
R 350 BlueTEC ............................... 346
Vehicle status message memory .... 130
Vehicle tool kit .................................. 270
Vehicle washing see Vehicle care
Vehicle weights
see Vehicle specification W
Warning lamps see Lamps, Indicator and warning


Warning sounds
Distance warning function .............152
Distronic ........................................ 147
Driver’s or passenger’s seat belt ..... 5118
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Product Information
Please observe the following in your own best
interest:
We recommend using Genuine Mercedes-
Benz Parts as well as conversion parts and
accessories explicitly approved by us for your
vehicle model.
We have tested these parts to determine their
reliability, safety and special suitability for
Mercedes-Benz vehicles.
We are unable to make an assessment for
other products and therefore cannot be held
responsible for them, even if in individual
cases an official approval or authorization by
governmental or other agencies should exist.
Use of such parts and accessories could
adversely affect the safety, performance or
reliability of your vehicle. Please do not use
them.
Genuine Mercedes-Benz Parts and pre-
approved conversion parts and accessories
are available at any authorized Mercedes-
Benz Center. In addition, you will receive
comprehensive information on permissible
technical modifications and expert
installations. Operator’s Manual
Notes
This
Operator’s Manual contains a great deal
of useful information. We urge you to read it
carefully and familiarize yourself with the
vehicle before driving.
For your own safety and longer service life of
the vehicle, we urge you to follow the
instructions and warnings contained in this
Operator’s Manual. Ignoring them could
result in damage to the vehicle or personal
injury to you or others. Vehicle damage
caused by failure to follow instructions is not
covered by the Mercedes-Benz Limited
Warranty. We continuously strive to improve our
product and ask for your understanding that
we reserve the right to make changes in
design and equipment. Therefore,
information, illustrations, and descriptions in
this

Operator’s Manual might differ from your
vehicle. Vehicle equipment
Your vehicle may have some or all of the
equipment described in this manual.
Therefore, you may find explanations for
optional equipment not installed in your
vehicle. If you have any questions about
operating particular equipment, any
authorized

Mercedes-Benz Center will be glad
to demonstrate the proper procedures.
Optional equipment is also described in this
manual, including operating instructions
wherever necessary. Since they are special-
order items, the descriptions and illustrations
herein may vary slightly from the actual
equipment of your vehicle.
If there are any equipment details that are not
shown or described in this Operator’s
Manual, any authorized Mercedes-Benz
Center will be glad to inform you of correct
care and operating procedures. The
Operator’s Manual and Maintenance Booklet
are important documents and should be kept
with the vehicle. Service and warranty information
The Service and Warranty Information
booklet contains detailed information about
the

warranties covering your Mercedes-Benz,
including:
R New Vehicle Limited Warranty
R Emission System Warranty
R Emission Performance Warranty
R California, Connecticut, Maine,
Massachusetts, New York, Pennsylvania, 20
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Front air bags
G
Observe Safety notes, see page 37. Driver’s front air bag
: and front passenger
front air bag ; are designed to provide
increased protection for the driver and front
passenger against the risk of injuries to the
head and thorax.
Driver and front passenger front air bags are
deployed
R in the event of certain frontal impacts
R if impact exceeds a preset deployment
threshold
R if the system determines that air bag
deployment can offer additional protection
to that provided by the seat belt
R depending on whether the respective seat
belt is in use
R independently of the side impact air bags
and/or the window curtain air bags
The front air bags in this vehicle have been
designed to inflate in two stages. This allows
the air bags to have different rates of inflation.
The rate of inflation is based on the vehicle
deceleration rate as assessed by the air bag
control unit.
Vehicles with OCS, USA only: The front
passenger front air bag deployment is
additionally influenced by the passenger’s
weight category as identified by the Occupant
Classification System (OCS) ( Y page 42).
Vehicles with OCS, USA only: The lighter the
front passenger-side occupant, the higher the
vehicle deceleration rate required for second stage inflation of the front passenger front air
bag.
The air bags will not deploy in impacts which
do not exceed the system’s preset
deployment thresholds. You will then be
protected by the fastened seat belts.
The front air bags will not deploy in the event
of a rollover unless the vehicle’s rate of
longitudinal deceleration or acceleration
exceeds the preset deployment threshold for
the front air bags.
The front passenger front air bag will only be
deployed if
R
vehicles with OCS, USA only: the system,
based on OCS weight sensor readings,
detects that the front passenger seat is
occupied
R the 42 indicator lamp in the
center console is not lit
(USA only: (Y page 42),
Canada only: ( Y page 45))
R the impact exceeds a preset deployment
threshold
! Vehicles with BabySmart™ air bag
deactivation system (Canada only): Do not
place objects heavier than 20 lb (9 kg) on
the front passenger seat. This could cause
the front or side impact air bag on the front
passenger side to deploy in a crash which
exceeds the system’s deployment
threshold.
Side impact air bags G
Observe Safety notes, see page 37. G
Warning!
The pressure sensors for side impact air bag
control are located in the doors. Do not
modify any components of the doors or door
trim panels including, for example, the
addition of door speakers.
Improper repair work on the doors or the
modification or addition of components to the
doors create a risk of rendering the side 40
Occupant safetySafety and security
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Seat belt adjustment function
The seat belt adjustment function adjusts the
seat belts on both front seats to the upper
body
of the respective vehicle occupant. The
seat belt will be pulled slightly tighter for that
purpose when
R you engage the latch plate into the buckle
and then turn the SmartKey in the starter
switch to position 2
R the SmartKey in the starter switch is in
position 2 and you then engage the latch
plate in the buckle
The seat belt adjustment function takes place
with a certain amount of retracting force
when the system senses slack between the
vehicle occupant and the seat belt. Do not
retain the seat belt during this procedure. You
can activate or deactivate the seat belt
adjustment function via the control system
(Y page 138).
Releasing the seat belts X
Press seat belt release button ?
(Y page 50).
Allow the retractor to completely rewind
the seat belt by guiding latch plate ;
(Y page 50).
! Make sure the seat belt retracts
completely.

Otherwise the seat belt and/or
latch plate could get caught or pinched in
the door or in the seat mechanism. This can
damage the seat belt and impair its
effectiveness, and/or cause damage to the
door and/or door trim panel. Such damage
is not covered by the Mercedes-Benz
Limited Warranty.
Damaged seat belts must be replaced.
Contact an authorized Mercedes-Benz
Center.
Enhanced seat belt reminder system When the engine is started, the seat belt
telltale
7 will always illuminate for 6 seconds to remind you and your passengers
to fasten your seat belts.
If the driver’s seat belt is not fastened when
the engine is started, an additional warning
chime

will sound. The warning chime goes out
after approximately 6 seconds or once the
driver’s seat belt is fastened.
If after these 6 seconds the driver’s or the
front passenger’s seat belt (with the front
passenger seat occupied) is not fastened with
front doors closed,
R the seat belt telltale 7 remains
illuminated for as long as either the driver’s
or front passenger’s seat belt is not
fastened.
R and if the vehicle speed once exceeds
15 mph (25 km/h), the seat belt telltale
7 starts flashing and a warning chime
sounds with increasing intensity for a
maximum of 60 seconds or until the
driver’s and front passenger’s seat belt are
fastened.
If you and/or your passenger release the
seat belt during driving, the seat belt
telltale 7 starts flashing and the
warning chime sounds as described before.
If the driver’s or the front passenger’s seat
belt remains unfastened after 60 seconds,
the warning chime stops sounding, the seat
belt telltale 7 stops flashing but
continues to be illuminated.
After a vehicle standstill, the warning chime
is reactivated and the seat belt telltale
7 is flashing again if the vehicle speed
once exceeds 15 mph (25 km/h).
The seat belt telltale 7 will only go out if
both the driver’s and the front passenger’s
seat belt (with the front passenger seat
occupied) are fastened, or the vehicle is
standing still and a front door is opened.
For more information, see “Practical hints”
(Y page 302). Occupant safety
51
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R
If the vehicle is in a critical dynamic driving
situation, the door windows close, except
for a minimal gap that remains open.
R Vehicles with power tilt/sliding sunroof: If
the vehicle is in a critical dynamic driving
situation, the tilt/sliding sunroof also
closes, except for a minimal gap that
remains open.
If the closing procedure of any of these
elements is blocked, it will stop and open
slightly.
Once the hazardous situation no longer exists
and an accident has been avoided, the seat
belt pre-tensioning is deactivated. All of the
PRE-SAFE ®
settings can be re-adjusted
following the critical driving event.
If the seat belts do not release:
X Adjust the seat backrest or seat slightly to
the rear until the seat belt tension is
reduced.
The locking mechanism releases.
! When moving the seats, make sure there
are no items in the footwell or behind the
seats. Otherwise, you could damage the
seats and/or the items.
For information on the seat belt adjustment
function as an integrated comfort feature of
PRE-SAFE ®
, see ( Y page 51). NECK-PRO active front head
restraints
The NECK-PRO active front head restraints
are intended to offer the driver and front
passenger increased protection from
whiplash-type injuries. In the event of a rear-
end

collision, the NECK-PRO active front head
restraints on the front seats are designed to
move forward in the direction of travel. They
thus provide the head with increased support
earlier on in the collision sequence. The
NECK-PRO active front head restraints will
move forward whether the seats are occupied
or not. G
Warning!
Do not attach any objects (e.g. hangers) to the
head restraint posts. Otherwise, the NECK-
PRO active front head restraints may not be
able

to function properly or offer the intended
degree of protection they were designed for
in the event of a rear-end collision. G
Warning!
Only use seat or head restraint covers which
have
been tested and approved by Mercedes-
Benz for your vehicle model.
Using other seat or head restraint covers may
interfere with or prevent the activation of the
NECK-PRO active front head restraints and/
or the deployment of the front side impact air
bags.
Contact an authorized Mercedes-Benz Center
for availability.
When the NECK-PRO active front head
restraints have been triggered in an accident,
the NECK-PRO active front head restraints
must be reset. Otherwise, the NECK-PRO
active front head restraints cannot offer any
additional protection in the event of another
rear-end collision.
For information on resetting the activated
NECK-PRO active front head restraints, see
“Resetting activated head restraints”
(Y page 310).
You cannot remove the NECK-PRO active
front head restraints. G
Warning!
For your protection, drive only with properly
positioned head restraints.
Adjust

the head restraint so that it is as close
to the head as possible and the center of the
head restraint supports the back of the head
at eye level. This will reduce the potential for
injury to the head and neck in the event of an
accident or similar situation.
For information on head restraint adjustment,
see “Head restraint height” ( Y page 83), or Occupant safety
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