
U
Uniform Tire Quality Grading
Standards  .................................. 244, 252
Units  
Selecting speedometer display
mode  ............................................. 131
Unleaded gasoline, premium  ........... 354
Unlocking the vehicle  
KEYLESS-GO  .................................... 71
Manually  ........................................ 309
SmartKey  ......................................... 70
Upholstery, cleaning  ......................... 266
Useful features  .................................. 207
V
Valet locking  ........................................ 77
Vehicle  
Battery  ........................................... 321
Care  ............................................... 260
Control system  .............................. 118
Identification Number (VIN)  ...........332
Locking/unlocking ........................... 70
Lowering (wheel change)  ...............321
Modifications and alterations,
Operating safety  .............................. 22
Towing  ........................................... 325
Unlocking/locking manually  ..........309
Vehicle dimensions
see Vehicle specification                          
Vehicle Identification Number
(VIN)  ................................................... 332
Vehicle jack see Jack                                                     
Vehicle lighting  .................................... 90
Vehicle loading  
Cargo tie-down rings ...................... 203
Instructions .................................... 202
Load limit  ....................................... 239
Roof rack  ....................................... 203
Split rear seat bench  .....................204
Terminology  ................................... 250
Vehicle maximum load on the tire  ... 252
Vehicle specification  
C 250 ............................................. 334
C 250 4MATIC  ............................... 335
C 250 4MATIC Sport ...................... 336
C 250 Sport  ................................... 334
C 300 ............................................. 337
C 300 4MATIC  ............................... 339
C 300 4MATIC Sport ...................... 340
C 300 Sport  ................................... 338
C 350 ............................................. 341
C 350 4MATIC  ............................... 343
C 350 Sport  ................................... 342
C 63 AMG  ...................................... 343
Vehicle status message memory  .... 129
Vehicle tool kit  .................................. 268
Vehicle washing see Vehicle care                                        
Vehicle weights
see Vehicle specification                          
W
Warning sounds  
Driver’s or passenger’s seat belt  .....51
Parking brake  ................................ 281
Parktronic system  ..........................187
Seat belt telltale  ............................ 301
Warranty coverage  ............................ 332
Washer and headlamp cleaning
system  ................................................ 358
Washer fluid  
Mixing ratio  .................................... 358
Refilling  .......................................... 228
Washing the vehicle  .......................... 260
Wear pattern (tires)  .......................... 245
Weights (vehicle) see Vehicle specification                          
Wheel  
Changing  ....................................... 317
Removing  ....................................... 320
Spare  ............................................. 317
Tightening torque ........................... 321
Wheels, sizes  ..................................... 344
Wheels, Tires and  .............................. 229
Window curtain air bags  ..................... 42
Windows see Power windows                                  
Windows, cleaning  ............................ 264
Windshield  
Cleaning wiper blades .................... 264
Defogging  ...................................... 195
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Washer fluid ................................... 358
Wipers  ............................................. 96
Windshield wipers  
Replacing wiper blades  ..................316
Winter driving  
Instructions .................................... 253
Snow chains  .................................. 253
Tires ............................................... 252
Winter tires  ................................ 252, 344
Wood trims, cleaning  ........................ 266Index19204_AKB; 5; 23, en-USd2ureepe,Version: 2.11.8.12009-07-16T17:54:06+02:00 - Seite 19 

Exterior view
iThis Operator’s Manual describes all features, standard or optional, potentially available
for your vehicle at the time of purchase. Please be aware that your vehicle might not be
equipped with all features described in this manual.
FunctionPage:Trunk:Locking and unlocking70,
309
Opening and closing75Valet locking77;Rear lamps314=Rear window defroster196?Fuel filler flap222AExterior rear view mirrors86BPower tilt/sliding sunroof196Panorama roof with power
tilt/sliding panel199
CWindshield:Wiping with washer fluid97Cleaning264FunctionPageDDoors:Locking and unlocking70,
309
EWipers96Wiper blades, replacing316Wiper blades, cleaning264FHood224GFront lamps314HHeadlamp cleaning system93IFront towing eye326JTires and wheels229Rims and tires344KRear towing eye32626Exterior viewAt a glance
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:p Right rear reading lamp on/off;p Left rear reading lamp on/off=Left reading lamp?Rear interior lampARight reading lampXSwitching rear reading lamps on/off:
Press respective reading lamp switch
p.
Wipers
Notes
! Do not operate the wipers when the
windshield is dry. Dust that accumulates on
a windshield might scratch the glass and/
or damage the wiper blades when wiping
occurs on a dry windshield. If it is necessary
to operate the wipers in dry weather
conditions, always operate the wipers with
washer fluid.
! If the windshield wipers leave smears on
the windshield after the car has been driven
through an automatic car wash, then wax
or other residue is on the windshield.
Shortly after washing the car in an
automatic car wash, clean the windshield
with washer fluid.
Windshield wipersXObserve notes on page (Y page 96).
Switching on/off
Combination switch
1$ Windshield wipers off2Ä Slow intermittent wiping53Å Fast intermittent wiping64° Slow continuous wiping5¯ Fast continuous wipingBí Single wipe/ î Wiping with
washer fluid
XSwitch on the ignition.XTurn the combination switch to the desired
position, depending on the intensity of the
rain.
iWhen the windshield wipers are switched
on and you stop the vehicle, the wipers
operate more slowly.
Intermittent wiping 
Only switch on intermittent wiping under wet
weather conditions or in the presence of
precipitation.
! Vehicles with rain sensor: Do not leave
windshield wipers on an intermittent
setting when the vehicle is taken to an
automatic car wash or during windshield
cleaning. Windshield wipers will operate in
5Rain sensor operation with low sensitivity.6Rain sensor operation with high sensitivity.
96WipersControls in detail
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the presence of water sprayed on the
windshield, and windshield wipers may be
damaged as a result.
!  Vehicles with rain sensor: If you have set
intermittent wiping, dirt on the surface of
the rain sensor or optical effects may cause
the windshield wipers to wipe in an
undesired fashion. This could then damage
the windshield wiper blades or scratch the
windshield. You should therefore switch off
the windshield wipers when weather
conditions are dry.
Vehicles with rain sensor: Intermittent wiping
interval is dependent on the wetness of the
windshield. After the initial wipe, pauses
between wipes are controlled by the rain
sensor automatically.XTurn the combination switch to position
Ä  or Å .
Intermittent wiping starts with selected
wiping interval.
Intermittent wiping is interrupted when the
vehicle is at a standstill and a front door is
opened. This protects persons getting into or
out of the vehicle from being sprayed.
Intermittent wiping will be continued when all
doors are closed and
R the clutch pedal is depressed (vehicles with
manual transmission)
or
R the automatic transmission is in drive
position  D or reverse gear  R (vehicles with
automatic transmission)
or
R the wiper setting is changed using the
combination switch
Single wipe
XPress the combination switch briefly in
direction of arrow  B to the resistance
point.
The windshield wipers wipe one time
without washer fluid.Wiping with washer fluidXPress the combination switch in direction
of arrow  B past the resistance point.
The windshield wipers operate with washer
fluid.
i To prevent smears on the windshield or
noisy/chattering wiper blades, wipe with
washer fluid every now and then even when
it is raining.
For information on filling up the washer
reservoir, see “Washer system and headlamp
cleaning system” ( Y page 228).
For information on cleaning the headlamps
with washer fluid, see “Headlamp cleaning
system” ( Y page 93).
Problems with wipers
!  If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off
immediately.
For safety reasons, do the following before
attempting to remove any blockage:
R Stop the vehicle in a safe location.
R Remove the SmartKey from the starter
switch.
or
R Turn off the engine by pressing the
KEYLESS-GO start/stop button and
open the driver’s door (with the driver’s
door open, starter switch is in position
0 , same as with SmartKey removed from
starter switch).
R Engage the parking brake.
R Remove blockage.
R Turn the windshield wipers on again.
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Be careful not to apply wax to rear view
camera lens  : when waxing the vehicle. If
necessary, remove the wax using the
Mercedes-Benz approved Car Shampoo with
plenty of water.
!  Do not clean the camera and the area
around the camera
R with a high-pressure cleaner
R with a dry cloth and strong pressure
R with aggressive cleaning agents
You could otherwise damage the camera.
Cleaning the windows and the wiper 
blades
!  The windshield wipers must be in a
vertical position before folding them away
from the windshield. They could otherwise
damage the hood.
Never open the hood when the wiper arms
are folded forward.
XMake sure the hood is fully closed.XSwitch on the ignition.XTurn combination switch to wiper setting
°  (Y  page 96).XWith wiper arms in vertical position, switch
off the ignition.GWarning!
For safety reasons, switch off wipers and
remove SmartKey from starter switch before
cleaning the windshield and/or the wiper
blades. Vehicles with KEYLESS-GO: Make
sure the vehicle’s on-board electronics have
status  0. Otherwise, the wiper motor could
suddenly turn on and cause injury.
!  Do not pull on the wiper blade inserts.
They could tear.
XFold the wiper arms forward until they snap
into place.XClean the windshield and the wiper blade
inserts with a clean cloth and mild
detergent solution.XUse a soft, clean cloth and a mild window
cleaning solution on all outside and inside
glass surfaces.
An automotive glass cleaner is
recommended.
!  Fold the windshield wiper arms back onto
the windshield before turning the SmartKey
in the starter switch or pressing the
KEYLESS-GO start/stop button.
Hold on to the wiper when folding the wiper
arm back. If released, the force of the
impact from the tensioning spring could
crack the windshield.
!  To clean the window interior, do not use
a dry cloth, abrasives, solvents or cleaners
containing solvents. Do not touch the
inside of the windows with hard objects
such as an ice scraper or ring. Doing so may
damage the windows.
Cleaning the panorama roof with power 
tilt/sliding panel
The rear part of the tilt/sliding panel has a
protective layer on the inside.
XUse a soft, clean cloth and a mild window
cleaning solution.
An automotive glass cleaner is
recommended.
!  Do not use a dry cloth, abrasives, solvents
or cleaners containing solvents. Do not
touch the protective layer with hard objects
such as an ice scraper or ring. Never apply
strong force and only use a soft, non-
scratching cloth when cleaning the rear
part of the tilt/sliding panel.
Otherwise you may scratch or damage the
protective layer.
264Vehicle careOperation
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Vehicle equipment ............................268
Where will I find ...? ..........................268
Vehicle status messages in the
multifunction display .......................270
What to do if … ..................................297
Unlocking/locking manually ...........309
Resetting activated NECK-PRO
active front head restraints .............311
Replacing SmartKey batteries .........312
Replacing bulbs .................................313
Replacing wiper blades ....................316
Flat tire ..............................................317
Battery ...............................................321
Jump starting ....................................323
Towing the vehicle ............................325
Fuses ..................................................328
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Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following:
XSwitch off the ignition.XTurn the exterior lamp switch to position
$.
XOpen the trunk.
Tail lamp unit 
XDriver’s side: Lift up the bottom and pull out
the trim panel covering the driver side rear
light.
XPassenger side: Open the fuse box in the
trunk (Y page 329).
XDisconnect electrical connector ;.XPull tabs : in direction of arrows.XRemove the bulb carrier.
Bulb carrier
=Side marker lamp?Rear fog lamp (driver’s side only), side
marker lamp
ABackup lampBTail lamp, brake lampCTail lamp, brake lamp, parking and
standing lamp
DTurn signal lamp
Side marker lamp
XTurn the bulb socket on backside of tail
lamp unit counterclockwise and remove
side marker lamp = with bulb socket.
XTurn the new bulb with socket on backside
of tail lamp unit clockwise until it engages.
Other lamps
XDepending on which bulb needs to be
replaced, press gently onto the respective
bulb and turn it counterclockwise out of its
bulb socket.
XGently press the new bulb into its bulb
socket and turn it clockwise until it
engages.
Reinstall bulb carrier
XReinstall the bulb carrier and let tabs :
(Y page 316) engage.
XConnect the electrical connector ;
(Y page 316) until it engages.
XReinstall trim panel.
Replacing wiper blades
Safety notes
GWarning!
For safety reasons, switch off the wipers and
remove the SmartKey from the starter switch
(vehicles with KEYLESS-GO: Make sure the
vehicle’s on-board electronics have status 0)
before replacing a wiper blade. Otherwise, the
wiper motor could suddenly turn on and cause
injury.
316Replacing wiper bladesPractical hints
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