
System settings ............................. 147
Telephone  ...................................... 167
Auto-dimming rear view mirrors  ........ 87
Automatic central locking  .......... 74, 135
Automatic headlamp mode  ................ 91
Automatic interior lighting control  .... 95
Automatic locking when driving  ...... 135
Automatic shift program  .................. 111
Automatic transmission  ................... 108
Automatic shift program  ................111
Gear range indicator  ......................111
Gear ranges  ................................... 111
Gear selector lever  ........................108
Hill-start assist system  ..................183
Kickdown  ....................................... 110
Kickdown (manual shift program)  ..115
Manual shift program ..................... 113
One-touch gearshifting  ..................112
Program mode indicator  ................112
Program mode selector switch
(automatic shift program)  ..............111
Program mode selector switch
(manual shift program)  ..........113, 114
Shifting procedure  .........................109
Steering wheel gearshift control  ....112
Transmission position indicator  .....109
Transmission positions  ..................109
AUX socket  ........................................ 166
Axle oils  .............................................. 351
B
BabySmart™  
Air bag deactivation system  .............46
Self-test  ........................................... 47
Back button  ....................................... 141
Backrest see Seats                                                  
Backup lamps  
Messages in the multifunction
display  ........................................... 292
Replacing bulbs  ............................. 314
Bar (air pressure unit)  ....................... 250
BAS (Brake Assist System)  ................. 61
Batteries, SmartKey  
Checking condition  ..........................73
Replacing  ....................................... 312
Battery, Vehicle ................................. 321
Charging  ........................................ 323
Jump starting  ................................. 323
Messages in the multifunction
display  ........................................... 290
Bead (tire)  .......................................... 250
Beverage holders see Cup holders                                        
Bluetooth ®
 settings  .......................... 147
Brake Assist System see BAS                                                     
Brake fluid  
Checking level  ............................... 228
Messages in the multifunction
display  ........................................... 282
Brake lamps  
Cleaning lenses  ............................. 263
Replacing bulbs  ............................. 314
Brake pads  
Messages in the multifunction
display  ........................................... 279
Brakes  ................................................ 255
High-performance brake system  ....256
Parking brake  ................................ 105
Warning lamp ................................. 298
Break-in period  .................................. 222
Bulbs see Replacing bulbs                                  
C
CAC (Customer Assistance Center)  ... 23
California retail buyers and
lessees, important notice for  ............. 21
Calls (phone)  .............................. 128, 167
Can holders see Cup holders                                        
Capacities and recommended
fuel/lubricants  .................................. 349
Cargo tie-down rings  ......................... 203
Carpets, cleaning  .............................. 265
CD player  ............................................ 158
Center console  
Lower part  ....................................... 32
Upper part  ....................................... 31
Central locking  
Automatic  ................................ 74, 135
KEYLESS-GO  .................................... 71
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Electrical system 
Improper work on or
modifications  ................................... 22
Power outlets ................................. 210
Electrical system (Technical data)
see Vehicle specification                          
Electronic Stability Program
see ESP ®
                                                  
Electronic Traction System
see ETS/4-ETS                                          
Emergency, in case of  
First aid kit ..................................... 268
Flat tire  .......................................... 317
Hazard warning flasher  ....................93
Roadside Assistance ................ 21, 214
Towing the vehicle  .........................325
Emergency calls  
Tele Aid  .......................................... 212
Telephone  ...................................... 173
Emergency operations  
Remote door lock (Tele Aid) ........... 216
Remote door unlock (Tele Aid)  .......215
Trunk lid, emergency release  ...........76
Emergency Tensioning Device
see ETD                                                     
Emission control  ............................... 258
Information label ............................ 333
System warranties  ...........................20
Engine  
Break-in recommendations  ............222
Cleaning ......................................... 262
Compartment  ................................ 224
Malfunction indicator lamp  ............305
Messages in the multifunction
display  ........................................... 288
Number .......................................... 333
Starting  .......................................... 101
Turning off  ..................................... 106
Engine (Technical data)
see Vehicle specification                          
Engine coolant
see Coolant                                               
Engine oil  
Adding  ........................................... 226
Additives  ........................................ 353
Checking level  ............................... 226
Consumption  ................................. 225Messages in the multifunction
display  ........................................... 291
Oil dipstick ..................................... 226
Recommended engine oils and oil
filter  ............................................... 353
ESP ®
 (Electronic Stability
Program)  .............................................. 62
ETS/4-ETS  ....................................... 63
Messages in the multifunction
display  ........................... 280, 281, 283
Warning lamp ................................. 302
ETD (Emergency Tensioning
Device)  ................................................. 52
Safety guidelines  ............................. 39
Ethanol fuel (E85)  .............................. 355
ETS/4-ETS (Electronic Traction
System)  ................................................ 63
Express operation  
Panorama roof  ............................... 200
Power windows  ................................ 98
Tilt/sliding sunroof  ........................196
Exterior lamp switch  ........................... 90
Exterior rear view mirrors  .................. 86
Fold-in function  ................................ 88
Parking position  ............................... 87
Power-folding  ................................... 88
Switching fold-in function on or
off  .................................................. 136
Exterior view of vehicle  ...................... 26
F
Fastening the seat belts  ..................... 50
First aid kit  ......................................... 268
Flat tire  ............................................... 317
Lowering the vehicle  ......................321
Mounting the spare wheel  .............318
Preparing the vehicle  .....................318
Spare wheel ........................... 317, 349
Flexible Fuel Vehicles  ....................... 355
Floormats  ........................................... 220
Fluids  
Automatic transmission fluid  .........350
Brake fluid  ..................................... 351
Capacities  ...................................... 349
Engine coolant  ............................... 351
Engine oil  ....................................... 350
Manual transmission oil  .................350
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Power steering fluid .......................351
Washer and headlamp cleaning
system  ........................................... 352
Fog lamps  ............................................. 92
Messages in the multifunction
display  ................................... 292, 294
Fold-in function for exterior rear
view mirrors  ........................................ 88
Four-wheel drive see All-wheel drive (4MATIC)                    
Front air bags
see Air bags                                              
Front axle oil  ...................................... 351
Front lamps see Headlamps                                         
Front passenger front air bag  ............ 40
Messages in the multifunction
display  ........................................... 272
Front passenger front air bag off
indicator lamp (Canada only)  ..... 46, 307
Front passenger front air bag off
indicator lamp (USA only)  .......... 42, 308
Front seat head restraints see Head restraints                                   
Fuel  ..................................................... 222
Additives  ........................................ 355
Capacity, fuel tank  .........................352
Drive sensibly–safe fuel  .................254
Ethanol fuel (E85)  .......................... 355
Fuel consumption (Flexible Fuel
Vehicle) .......................................... 355
Fuel consumption statistics  ...........122
Fuel filler flap and cap  ...................223
Fuel tank reserve warning lamp  .....304
Premium unleaded gasoline  ...........354
Refueling ........................................ 222
Requirements  ................................ 354
Switching (Flexible Fuel Vehicle) .... 355
Fuel filler flap  ..................................... 223
Opening manually  ..........................310
Fuel gauge  ................................... 28, 118
Fuels, coolants, lubricants etc.  ........ 349
Fuel tank  
Capacity  ........................................ 352
Fuel filler flap and cap  ...................223
Refueling ........................................ 222
Fuses  .................................................. 328G
Garage door opener  .................... 32, 216
Gasoline see Fuel                                                     
GAWR (Gross Axle Weight Rating)  ... 251
Gear range  ......................................... 111
Indicator  ........................................ 111
Limiting  .......................................... 112
Shifting into optimal  ......................113
Gear selector lever  ............................ 108
Cleaning ......................................... 265
Gearshift pattern  ........................... 108
Lock  ...................................... 102, 108
Shifting procedure  .........................109
Transmission position indicator  .....109
Transmission positions  ..................109
Gearshift lever  ................................... 107
Gearshift pattern  ........................... 107
Generator
see Alternator                                           
Global locking/unlocking
see Key, SmartKey                                    
Glove box  ........................................... 205
Gross Axle Weight Rating see GAWR                                                 
Gross Vehicle Weight
see GVW                                                    
Gross Vehicle Weight Rating
see GVWR                                                 
GVW (Gross Vehicle Weight)  ............ 251
GVWR (Gross Vehicle Weight
Rating)  ................................................ 251
H
Halogen headlamps see Headlamps                                         
Hard plastic trim items, cleaning  .... 265
Hazard warning flasher  ....................... 93
Headlamp cleaning system  ................ 93
Headlamps  
Active Bi-Xenon headlamps  .............90
Automatic headlamp mode  ..............91
Bi-Xenon  .................................. 90, 314
Cleaning lenses  ............................. 263
Cleaning system  .............................. 93
Daytime running lamp mode  ............91
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M
Maintenance  ........................................ 21
Maintenance System  
Service indicator display  ................259
Service indicator message  .............259
Service term exceeded  ..................259
Manual headlamp mode (Low-
beam headlamps)  ................................ 91
Manual shift program  ....................... 113
Manual transmission  ........................ 107
Gearshift lever  ............................... 107
Hill-start assist system  ..................183
Maximum engine speed
see Vehicle specification                          
Maximum loaded vehicle weight  ..... 251
Maximum load rating (tires)  ............. 251
Maximum permissible tire
inflation pressure  .............................. 251
Mechanical key see Key, Mechanical                                 
Media interface  ................................. 205
Memory function  ................................. 89
Menus see Control system menus                       
Minispare wheel
see Spare wheel                                        
Mirrors  .................................................. 86
Auto-dimming rear view mirrors ....... 87
Exterior rear view mirror parking
position  ............................................ 87
Exterior rear view mirrors  ................86
Interior rear view mirror  ...................86
Memory function .............................. 89
Power-folding exterior rear view
mirrors  ............................................. 88
Vanity mirror  .................................. 208
MON (Motor Octane Number)  .......... 354
Motor Octane Number see MON                                                   
MP3 mode  .......................................... 158
Multifunction display  ........................ 120
Symbol messages  ..........................279
Text messages  ............................... 272
Vehicle status messages  ...............270
Multifunction display messages  
ABS  ....................................... 280, 281
Active headlamps  .......................... 292Advanced TPMS ............................. 277
Air bags  ......................................... 272
Alternator  ...................................... 290
Backrests ....................................... 286
Battery  ........................................... 290
Brake fluid  ..................................... 282
Brake pads ..................................... 279
Child seat  ...................................... 275
Coolant  .......................................... 288
Corner-illuminating front fog
lamps  ............................................. 295
Cruise control  ................................ 275
Doors  ............................................. 286
EBP  ................................................ 281
Engine oil  ....................................... 291
ESP ®
 ............................. 280, 281, 283
Fog lamps  .............................. 292, 294
Front passenger front air bag  ........272
Gas cap .......................................... 291
High-beam lamps  ........................... 293
Hood  .............................................. 286
License plate lamps  .......................294
Light sensor  ................................... 294
Low-beam lamps ............................ 294
Parking brake  ................................ 281
Parking lamps  ................................ 293
Power steering  ............................... 288
Reserve fuel  ................................... 291
Reverse lamp  ................................. 292
Side marker lamps  .........................293
SmartKey  ....................................... 286
SmartKey with KEYLESS-GO  ..........286
SRS  ................................................ 284
Tail lamps  ...................................... 295
Tele Aid  .......................................... 284
Tire inflation pressure  ............276, 296
Tire pressure monitor  ....................277
Tires  ...................................... 276, 296
Trunk  ............................................. 286
Turn signals  ................................... 296
Multifunction steering wheel  
Adjustment  ...................................... 84
Buttons  .......................................... 118
Cleaning ......................................... 265
Easy-entry/exit feature  ...........85, 136
Gearshift control  ............................ 112
Memory function .............................. 89
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Sun visors .......................................... 208
T
Tachometer  .................................. 28, 117
Overspeed range  ........................... 117
Tail lamps  ........................................... 314
Cleaning lenses  ............................. 263
Messages in the multifunction
display  ........................................... 295
Replacing bulbs  ............................. 314
Tar stains  ........................................... 261
Technical data  
Air conditioning refrigerant  ....352, 354
Brake fluid  ............................. 351, 354
Capacities fuels, coolants,
lubricants etc.  ................................ 349
Coolant  .................................. 351, 356
Engine oil additives  ........................353
Engine oils  ............................. 350, 353
Fuel requirements .......................... 354
Gasoline additives .......................... 355
Identification labels  .......................332
Premium unleaded gasoline  ...........354
Rims and tires  ................................ 344
Spare wheel  ................................... 349
Vehicle specification C 250  ...........334
Vehicle specification
C 250 4MATIC  ............................... 335
Vehicle specification
C 250 4MATIC Sport ...................... 336
Vehicle specification C 250 Sport .. 334
Vehicle specification C 300  ...........337
Vehicle specification
C 300 4MATIC  ............................... 339
Vehicle specification
C 300 4MATIC Sport ...................... 340
Vehicle specification C 300 Sport .. 338
Vehicle specification C 350  ...........341
Vehicle specification
C 350 4MATIC  ............................... 343
Vehicle specification C 350 Sport .. 342
Vehicle specification C 63 AMG ..... 343
Washer and headlamp cleaning
system  ................................... 352, 358
Technical data (dimensions)
see Vehicle specification                          
Technical data (electrical system)
see Vehicle specification                          
Technical data (engine)
see Vehicle specification                          
Technical data (weights)
see Vehicle specification                          
Tele Aid  ............................................... 211
Emergency calls  ............................. 212
Information button  .........................215
Initiating an emergency call
manually  ........................................ 213
Messages in the multifunction
display  ........................................... 284
Remote door lock  .......................... 216
Remote door unlock  ......................215
Roadside Assistance button  ..........214
Search & Send  ............................... 215
SOS button  .................................... 213
Stolen Vehicle Recovery Services  ..216
System self-test  ............................. 212
Telephone  .......................................... 167
Answering/ending a call  ................128
Call lists  ......................................... 176
Emergency calls “911”  ..................173
Hands-free microphone  ...................33
Making calls ................................... 177
Menu  ............................................. 128
Operation ....................................... 128
Phone book  ........................... 128, 174
Redialing  ........................................ 129
Temperature  
Coolant  .......................................... 117
Interior temperature  ......................192
Outside  .......................................... 118
Tether anchorage points
see Children in the vehicle                        
Tie-down rings  ................................... 203
Tightening torque  
Wheels  ........................................... 321
Time setting  ....................................... 132
TIN (Tire Identification Number)  ...... 252
Tire and Loading Information
placard  ............................................... 238
Tire and loading terminology  ........... 250
Tire Identification Number see TIN                                                      16Index204_AKB; 5; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T17:54:06+02:00 - Seite 16 

Flexible Fuel Vehicles (identified by a label
reading Premium gasoline or E85 only! on
the fuel filler flap):
Ethanol fuel (E85) and its fumes are highly
flammable, poisonous and burn easily.
Ethanol fuel can cause serious injuries if
ignited or if you come into contact with it or
inhale fumes of it. Avoid inhalation of ethanol
fumes and skin contact with ethanol.
Extinguish all open flames before refueling.
Never smoke or create sparks close to
ethanol.
! Never refuel vehicles with gasoline engine
with diesel fuel. Even small amounts of
diesel fuel will damage the fuel system and
engine. Damage resulting from the use of
non-approved fuels or fuel additives or
resulting from mixing gasoline with diesel
fuel is not covered by the Mercedes-Benz
Limited Warranty.
! If you have accidentally filled the tank
with incorrect or non-approved fuel, do not
switch on the ignition. Otherwise the
incorrect or non-approved fuel will get into
the fuel lines. The fuel system must be
drained completely. Contact an authorized
Mercedes-Benz Center to have the fuel
system drained completely.
! To prevent damage to the catalytic
converters, only use premium unleaded
gasoline in this vehicle.
Flexible Fuel Vehicles (identified by a label
reading Premium gasoline or E85 only!
on the fuel filler flap) may be fueled with
E85. For additional information, see
“Flexible Fuel Vehicles”.
Any noticeable irregularities in engine
operation should be repaired promptly.
Otherwise, excessive unburned fuel may
reach the catalytic converter, causing it to
overheat and potentially start a fire.
i Only use premium unleaded gasoline with
a minimum Posted Octane Rating of 91
(average of 96 RON/86 MON). Information
on gasoline quality can normally be found
on the fuel pump. Please contact gas
station personnel in case labels on the
pump cannot be found.
C 300 and C 300 Sport with automatic
transmission:
Flexible Fuel Vehicles are identified by a
label reading Premium gasoline or E85 
only! on the fuel filler flap.
For more information on gasoline or E85,
see “Premium unleaded gasoline”
(Y page 354), see “Flexible Fuel Vehicles”
(Y page 355), see “Fuel requirements”
(Y page 354), or contact an authorized
Mercedes-Benz Center, or visit
www.mbusa.com (USA only).
Locking/unlocking the vehicle with the
SmartKey or KEYLESS-GO automatically
locks/unlocks the fuel filler flap.
iIn case the central locking system does
not release the fuel filler flap, see “Fuel filler
flap” (Y page 310).
The fuel filler flap is located on the right-hand
side of the vehicle towards the rear.
XTurn off the engine.
iLeaving the engine running and the fuel
filler cap open can cause the yellow engine
malfunction indicator lamp ; to
illuminate.
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For more information, see also “Practical
hints” ( Y page 305).XRemove the SmartKey from the starter
switch.
KEYLESS-GO: Open the driver’s door. This
puts the starter switch in position  0, same
as with the SmartKey removed from the
starter switch. The driver’s door then can
be closed again.XOpening:  Press fuel filler flap  : at the
point indicated by the arrow.XTurn fuel filler cap  ; counterclockwise.XTake off fuel filler cap  ;.
! 
The fuel filler cap is tethered to the fuel
filler neck. Do not drop the cap. It could
damage the vehicle paint finish.
XPlace fuel filler cap  ; in direction of arrow
into holder  =.XFully insert filler nozzle unit and refuel.XOnly fill your tank until the filler nozzle unit
cuts out –  do not top off or overfill .XClosing: Turn fuel filler cap  ; clockwise
until it audibly engages.
i Close the fuel filler flap before locking the
vehicle. Otherwise the flap locking pin will
prevent closing the fuel filler flap.
XClose fuel filler flap  :.
Check regularly and before a long trip
For information on quantities and
requirements of operating agents, see “Fuels,
coolants, lubricants, etc.” ( Y page 349).
Check the following:
R Engine oil level ( Y page 225)
R Tire inflation pressure ( Y page 232)
R Coolant level ( Y page 227)
R Vehicle lighting ( Y page 313)
R
Washer system and headlamp cleaning
system ( Y page 228)
R Brake fluid ( Y page 228)
Engine compartment
Hood
GWarning!
Do not pull the release lever while the vehicle
is in motion. Otherwise the hood could be
forced open by passing air flow.
This could cause the hood to come loose and
injure you and/or others.
Opening
GWarning!
Do not open the hood when the engine is
overheated. You could be seriously injured.
Observe the coolant temperature gauge to
determine whether the engine may be
overheated. If you see flames or smoke
coming from the engine compartment, move
away from the vehicle. Wait until the engine
has cooled. If necessary, call the fire
department.
GWarning!
You could be injured when the hood is open –
even when the engine is turned off.
Parts of the engine can become very hot. To
prevent burns, let the engine cool completely
before touching any components on the
vehicle. Comply with all relevant safety
precautions.
GWarning!
To help prevent personal injury, stay clear of
moving parts when the hood is open and the
engine is running.
The radiator fan may continue to run for
approximately 30 seconds or may even
restart after the engine has been turned off.
Stay clear of fan blades.
224Engine compartmentOperation
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Example illustration: Tire inflation pressuresspecific to rim diameter
Potential problems associated with 
underinflated and overinflated tires 
Underinflated tires
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.
Underinflated tires can
Rcause excessive and uneven tire wear
Radversely affect fuel economy
Rlead to tire failure from being overheated
Radversely affect handling characteristics
Overinflated tires
GWarning!
Follow recommended tire inflation pressures.
Do not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout)
because they are more likely to become
punctured or damaged by road debris,
potholes etc.
Overinflated tires can
Radversely affect handling characteristics
Rcause uneven tire wear
Rbe more prone to damage from road
hazards
Radversely affect ride comfort
Rincrease stopping distance
Checking tire inflation pressure
Safety notes
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.
Do not overinflate tires. Overinflated tires can
adversely affect handling and ride comfort,
wear unevenly, increase stopping distance,
and result in sudden deflation (blowout)
because they are more likely to become
punctured or damaged by road debris,
potholes etc.
Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver’s door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also result
in handling or steering problems, or brake
failure.
Check the tire inflation pressure at least once
a month.
Check and adjust the tire inflation pressure
when the tires are cold (Y page 230).
Checking tire inflation pressure 
manually
Follow the steps below to achieve correct tire
inflation pressure:
XRemove the cap from the valve on one tire.XFirmly press a tire gauge onto the valve.XRead the tire inflation pressure on the tire
gauge and check against the
recommended tire inflation pressure on the
232Tires and wheelsOperation
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