change wheel MERCEDES-BENZ C320 COUPE 2003 CL203 User Guide

273 Practical hints
Where will I find ...?
Spare wheel bolts
1Wheel bolt for light alloy rims
2Wheel bolt for light alloy spare wheel
rim size 4
1/2B x15 H2Refer to “Technical data” section
(
page 313) for model and spare wheel
rim size information.
Warning!
G
The jack is designed exclusively for jacking
up the vehicle at the jack take-up brackets
built into both sides of the vehicle. To help
avoid personal injury, use the jack only to lift
the vehicle during a wheel change. Never
get beneath the vehicle while it is supported
by the jack. Keep hands and feet away from
the area under the lifted vehicle. Always
firmly set parking brake and block wheels
before raising vehicle with jack.
Do not disengage parking brake while the
vehicle is raised. Be certain that the jack is
always vertical (plumb line) when in use, es-
pecially on hills. Always try to use the jack
on level surface. Make sure that the jack
arm is fully seated in the jack take-up brack-
et. Always lower the vehicle onto sufficient
capacity jack stands before working under
the vehicle.
!Wheel bolts2 must be used when
mounting spare wheel rim
size 4
1/2Bx15 H2 (
page 313).
The use of any wheel bolts other than
wheel bolts2 for spare wheel rim
size 4
1/2B x15 H2 can cause physical
damage to the vehicle.
Warning!
G
Be sure to use the original length wheel
bolts when remounting the original wheel af-
ter it has been repaired.

288 Practical hintsFlat tire
Flat tirePreparing the vehicle
Park the vehicle as far as possible from
moving traffic on a hard surface.

Turn on the hazard warning flashers.

Engage the steering wheel lock in the
straight ahead position and set the
parking brake.

Move the selector lever toP (manual
transmission to 1st or reverse gear).

Have any passenger exit the vehicle at
a safe distance from the roadway.
Mounting the spare wheel Preparing the vehicle
Prepare the vehicle as described under
“Preparing the vehicle” on this page.

Take the spare wheel out of the trunk
(page 271).
Lifting the vehicle

Prevent the vehicle from rolling away
by blocking wheels with wheel chocks
(not included) or other sizable objects.
When changing wheel on a level surface:

Place one chock in front of and one be-
hind the wheel that is diagonally oppo-
site to the wheel being changed.
Warning!
G
The dimensions of the spare wheel are dif-
ferent from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a spare wheel
mounted. Adapt your driving style accord-
ingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted, en-
sure proper tire pressure and do not exceed
vehicle speed of 50 mph (80 km/h).
Drive to the nearest Mercedes-Benz Center
as soon as possible to have the spare wheel
replaced with a regular road wheel.
Never operate the vehicle with more than
one spare wheel mounted.


289 Practical hints
Flat tire
When changing wheel on a hill:
Place chocks on the downhill side
blocking both wheels of the other axle.

Take the two-piece wheel wrench and
the jack out of the vehicle tool kit
(page 272). Assemble wheel wrench.

On whee l to b e change d, loos en b ut do
not yet remove the wheel bolts (ap-
proximately one full turn with wrench).
The jack take-up brackets are located di-
rectly behind the front wheel housings and
in front of the rear wheel housings.1Jack
2Crank
3Take-up bracket

Place jack on firm ground.

Position jack1 under the take-up
bracket3 so that it is always vertical
(plumb-line) as seen from the side,
even if the vehicle is parked on an in-
cline.

Jack up the vehicle until the wheel is a
maximum of 1.2 in (3 cm) from the
ground. Never start engine while vehi-
cle is raised.
Warning!
G
The jack is designed exclusively for jacking
up the vehicle at the jack take-up brackets
built into both sides of the vehicle. To help
avoid personal injury, use the jack only to lift
the vehicle during a wheel change. Never
get beneath the vehicle while it is supported
by the jack. Keep hands and feet away from
the area under the lifted vehicle. Always
firmly set parking brake and block wheels
before raising vehicle with jack.
Do not disengage parking brake while the
vehicle is raised. Be certain that the jack is
always vertical (plumb line) when in use, es-
pecially on hills. Always try to use the jack
on level surface. Make sure that the jack
arm is fully seated in the jack take-up brack-
et. Always lower the vehicle onto sufficient
capacity jackstands before working under
the vehicle.

328 Technical termsCollapsible tire
An especially compact spare tire that
must be inflated with a provided air
pump before using. It should only be
used to bring the vehicle to the nearest
service station.
COMAND*
(C
ockpit M
anagement and D
ata Sys-
tem)
Information and operating center for
vehicle sound and communications
systems, including the radio and navi-
gation system, as well as for other op-
tional equipment (CD changer,
telephone, etc.).
Control system
The control system is used to call up
vehicle information and to change
component settings. Information and
messages appear in the multifunction
display. The driver uses the buttons on
the multifunction steering wheel to
navigate through the system and to ad-
just settings.Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed
set by the driver.
Engine number
The number set by the manufacturer
and placed on the cylinder block to
uniquely identify each engine pro-
duced.
Engine oil viscosity
Measurement for the inner friction (vis-
cosity) of the oil at different tempera-
tures. The higher the temperature an
oil can tolerate without becoming thin,
or the lower the temperature it can tol-
erate without becoming viscous, the
better the viscosity.
ESP
(E
lectronic S
tability Pr
ogram)
Improves vehicle handling and direc-
tional stability.ETD
(E
mergency T
ensioning D
evice)
Device which deploys in certain frontal
and rear collisions exceeding the sys-
tem's threshold to tighten the seat
belts.
->SRS
FSS
(F
lexible S
ervice S
ystem)
Service indicator in the multifunction
display that informs the driver when
the next vehicle maintenance service is
due.
Gear range
Number of gears which are available to
the automatic transmission for shifting.
The automatic gear shifting process
can be adapted to specific operating
conditions using the selector lever.

329 Technical terms
GPS*
(G
lobal P
ositioning S
ystem)
Satellite-based system for relaying
geographic location information to and
from vehicles equipped with special re-
ceivers. Employs CD digital maps for
navigation.
Instrument cluster
The displays and indicator/warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer
and fuel gauge.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible gear.
This very quickly accelerates the vehi-
cle and should not be used for normal
acceleration needs.
Lock button
Button on the door which indicates
whether the door is locked or un-
locked. Pushing the lock button down
on an individual door from inside will
lock that door.Memory function*
Used to store three individual seat,
steering wheel and mirror positions for
each key.
Menu
The control system displays are ar-
ranged in menus. Each menu contains
a number of commands for particular
systems. In the Audio menu, for exam-
ple, you will find the commands
Select
radio station
or Operate CD player
.
Using commands you can directly
change the settings for your vehicle.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as AN-
TI-KNOCK INDEX.Multifunction display
Display field in the instrument cluster
used to present information provided
by the control system.
Multifunction steering wheel
Steering wheel with buttons for operat-
ing the control system.
Overspeed range
Engine speeds within the red marking
of the tachometer dial. Avoid this en-
gine speed range, as it may result in se-
rious engine damage that is not
covered by the Mercedes-Benz Limited
Warranty.

336 IndexCassette player
Operating 112
Catalytic converter 222
CD changer* 172
CD mode 172
CD player
Operating 111
Center console 25
AIRBAG OFF indicator lamp 251
Centigrade
Setting temperature units 117
Central locking
From inside 87
Switch 87
Switching on/off (control system) 122
Unlocking from inside 87
Central locking switch 87
Certification label 308
Changing
Batteries (SmartKey) 276
Key setting 123
Changing CDs 172
Charcoal filter 156
Charging
Vehicle battery 295CHECK ENGINE malfunction indicator
lamp 250
Checking
Coolant level 225, 229
Oil level 225, 227
Tire inflate pressure 225
Vehicle lighting 225
Child safety 65
Airbags 58
Infant and child restraint systems 62,
65
LATCH child seat mounts 70
Child seat mounts see LATCH child seat
mounts 70
Cigarette lighter 199
Cleaning
Cup holder 243
Gear selector lever 243
Hard plastic trim items 244
Headlamps 140
Headliner 244
Instrument cluster 243
Leather upholstery 244
Light alloy wheels 243
MB Tex upholstery 244
Plastic and rubber parts 244Seat belts 244
Steering wheel 243
Windows 243
Windshield 49
Wiper blades 243
Climate control 142
Adjusting 145
Defogging windshield 145
Defrosting 146
Rear window defroster 147
Setting the temperature 145
Clock 23, 116
Closing
Glove box 195
Hood 227
Side windows 182
Sliding/pop-up roof 186, 278
Sliding/pop-up roof with SmartKey
187
Sunshades for the
sliding/pop-up roof 185
Trunk lid 86
Windows 182
Windows with SmartKey 183
Closing sliding/pop-up roof
In an emergency 278

354 IndexVehicle tool kit 272
Alignment bolt 272
Spare fuses 272
Special fuse puller 272
Towing eye bolt 272
Vehicle jack 272
Wheel bolts 272
Wheel wrench 272
Vehicle washing 242
Ventilated storage compartment 148
Ventilation
Storage compartment 148
VIN (Vehicle Identification Number) 308,
331
Voice control system* 331
Voice recognition system*
Hands-free microphone 26
W
Warning sounds
Drivers seat belts 62
Parking brake 46
Warranty coverage 307
Washer fluid see Windshield washer fluid
Washing the vehicle 240
Wear pattern (tires) 235
Weights 316Wheel change
Tightening torque 291
Wheels
Rotating 235
Tires and wheels 233
Window curtain airbags 61
Windows see Side windows
Windshield
Defogging 145, 153
Refilling washer fluid 232
Replacing wiper blades 287
Washer fluid 232, 324
Washer system 324
Windshield washer fluid 324
Message in display 270
Mixing ratio 324
Refilling 232
Wiping with 49
Windshield washer system 324
Windshield wipers 48
Fast wiper speed 48
Replacing wiper blades 287
Single wipe 49
Switching on 48
Wiping with windshield washer fluid 49Winter driving 236
Block heater 237
Snow chains 237
Tires 236
Transmission program mode 136
Winter driving instructions 220
Winter tires 236
Wiper blades
Cleaning 243
Installing 287
Removing 287
Removing insert 287
Replacing 287
Wiping
And washing simultaneously 49
Interval 48
With windshield washer fluid 49
X
Xenon headlamps
Bi-Xenon 327