flat tire MERCEDES-BENZ C320 COUPE 2004 CL203 User Guide

303 Practical hints
Flat tire
Removing the wheel
1Alignment bolt
Unscrew upper-most wheel bolt and re-
move.

Replace this wheel bolt with the align-
ment bolt1 supplied in the tool kit.

Remove the remaining bolts.

Remove the wheel.Mounting the new wheel
1Wheel bolt for light alloy rims
2Wheel bolt for light alloy spare wheel
rim size 4
1/2B x15 H2

Clean contact surfaces of wheel and
wheel hub.

Guide the spare wheel onto the align-
ment bolt and push it on.

Insert wheel bolts and tighten them
slightly.

Inflate the spare tire using the electric
pump (
page 304).
!Do not place wheel bolts in sand or dirt.
This could result in damage to the bolt
and wheel hub threads.
!Wheel bolts2 must be used when
mounting spare wheel rim
size 4
1/2Bx15 H2 (
page 326).
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
Make sure to use original length wheel bolts
when remounting the original wheel after it
has been repaired.Warning!
G
Inflate spare wheel with collapsible tire only
after the wheel is properly mounted.
Inflate the spare wheel tire using the electric
air pump before lowering the vehicle.

304 Practical hintsFlat tire

Unscrew the alignment bolt, install last
wheel bolt and tighten slightly.Inflating the spare tire

Take the electric air pump out of the
trunk.
1Flap
2Air hose with pressure gauge and vent
screw
3Union nut
4Electrical plug
Please exercise appropriate caution
!To avoid paint damage, place wheel flat
against hub and hold it there while in-
stalling first wheel bolt.Warning!
G
Always replace wheel bolts that are dam-
aged or rusted.
Never apply oil or grease to wheel bolts.
Damaged wheel hub threads should be re-
paired immediately. Do not continue to drive
under these circumstances! Contact an au-
thorized Mercedes-Benz Center or call
Roadside Assistance.
Incorrect wheel bolts or improperly tight-
ened wheel bolts can cause the wheel to
come off. This could cause an accident.
Make sure to use the correct mounting
bolts.
Warning!
G
Use only genuine equipment
Mercedes-Benz wheel bolts. Other wheel
bolts may come loose.
Do not tighten the wheel bolts when the ve-
hicle is raised. Otherwise the vehicle could
tip over.
Warning!
G
Observe instructions on air pump label.

305 Practical hints
Flat tire

Open flap1 on air pump.

Pull out electrical plug4 and air hose
with the pressure gauge2.
Observe instructions on air pump label.

Remove the valve cap from valve.

Screw the air hose2 on to the tire
valve.

Insert electrical plug4 into vehicle
cigarette lighter socket.

To switch on the air pump turn the
SmartKey in the starter switch to
position1 (
page 31).

Operate air pump until the pressure
gauge displays 36 psi (2.5 bar)
This takes about five minutes for the
space tire. The air hose2 and the
union nut3 can become hot during in-
flation.

To switch off the air pump turn the
SmartKey in the starter switch to
position0 (
page 31).

If the tire pressure is above 36 psi
(2.5 bar), release excess tire pressure
using the vent screw.

Detach the electric air pump.

Store the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.
!Do not operate the electric air pump
longer than eight minutes without in-
terruption. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Warning!
G
Follow recommended inflation pressures.
Do not overinflate tires. Overinflated tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes,
etc.
Do not underinflate tires. Underinfalted tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
Do not overload the tires by exceeding the
specified vehicle capacity weight (as indicat-
ed by the label on the driver’s door latch
post). Overloading the tires can overheat
them, possibly causing a blowout.

306 Practical hintsFlat tireLowering the vehicle
Lower vehicle by turning crank coun-
terclockwise until vehicle is resting ful-
ly on its own weight.

Remove the jack.
1-5 Wheel bolts

Tighten the five wheel bolts evenly, fol-
lowing the diagonal sequence
illustrated (1 to 5), until all bolts are
tight. Observe a tightening torque of
80 lb-ft (110 Nm).

Before storing the jack in the trunk, it
should be fully collapsed, with handle
folded in.Warning!
G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque of
80 lb-ft (110 Nm).

325 Technical data
Rims and Tires
Rims and Tires
Use only tires and rims which have been
specifically developed for your vehicle and
tested and approved by Mercedes-Benz.
Other tires and rims can have detrimental
effects, such as

poor handling characteristics


increased noise


increased fuel consumption
!Moreover, tires and rims not approved
by Mercedes-Benz may, under load, ex-
hibit dimensional variations and differ-
ent tire deformation characteristics
that could cause them to come into
contact with the vehicle body or axle
parts. This may result in damage to the
tires or the vehicle.
iFurther information on tires and rims is
available at any authorized Mercedes-
Benz Center. A tire inflation pressure
table is located on the fuel filler flap of
the vehicle. The tire pressure should be
checked regularly and should only be
adjusted on cold tires. Follow tire man-
ufacturer’s maintenance recommenda-
tion included with vehicle.

340 Technical dataConsumer informationTemperature
The temperature grades are A (the high-
est), B, and C, representing the tire’s resis-
tance to the generation of heat and its
ability to dissipate heat when tested under
controlled conditions on a specified indoor
laboratory test wheel. Sustained high tem-
perature can cause the material of the tire
to degenerate and reduce tire life, and ex-
cessive temperature can lead to sudden
tire failure. Grade C corresponds to a level
of performance which all passenger car
tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B
and A represent higher levels of perfor-
mance on the laboratory test wheel than
the minimum required by law.
Warning!
G
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, underin-
flation, or excessive loading, either sepa-
rately or in combination, can cause
excessive heat build-up and possible tire
failure.

342 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 other optional
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 gear selector le-
ver.

348 IndexAir distribution
Adjusting 153
Air outlets
Rear passenger compartment 158
Air pressure see Tire inflation
pressure 245
Air recirculation mode 154
Activating 154
Deactivating 155
Air volume
Adjusting 153
Airbags 57
BabySmartTM
airbag deactivation system 67, 341
Children 58
Front 61
PASS.AIRBAG OFF
indicator lamp 67, 263
Passenger 61
Safety guidelines 60
Side impact 61
Window curtain 61
Alarm
Audible 72, 79Canceling 79
Visual 78
Alarm system
Anti-theft 78
Alignment bolt 303
Alignment bolt (vehicle tool kit) 341
Anticorrosion/antifreeze 337
Antiglare
Automatic 146
Antilock brake system (ABS) 341
Anti-theft alarm system
Arming 78
Canceling alarm 79
Disarming 79
Anti-theft systems 78
Anti-theft alarm system 78
Immobilizer 78
Tow-away alarm 79
Aquaplaning 227
Armrest
Storage compartment in front of 201
Storage spaces 202Ashtray 203
ATF (automatic transmission fluid) 241
AUDIO menu 114
Selecting radio station 115
Audio system 159
Audio and telephone, operation 159
Button and soft key operation 162
Cassette operation 172
CD operation 175
Operating and display elements 160
Operating safety 159
Operation 162
Radio operation 165
Switching off 162
Switching on 162
Telephone operation 179
Automatic antiglare for
rear view mirror 146
Automatic central locking
Activating/deactivating
(control system) 129

351 Index
Checking
Coolant level 235, 241
Oil level 235, 237
Tire inflate pressure 235
Vehicle lighting 235
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 204
Cleaning
Cup holder 255
Gear selector lever 255
Hard plastic trim items 255
Headlamps 148
Headliner and shelf
below rear window 255
Instrument cluster 255
Leather upholstery 256
Light alloy wheels 254MB Tex upholstery 256
Plastic and rubber parts 256
Seat belts 255
Steering wheel 255
Upholstery 256
Windows 254
Windshield 50
Wiper blades 254
Wood trims 256
Climate control 150
Adjusting 153
Defogging windshield 153
Defrosting 154
Rear window defroster 149
Setting the temperature 153
Clock 23, 122
Closing
Glove box 200
Hood 237
power window with SmartKey 188Roller sunblind for the
sliding/pop-up roof 189
Side windows 187
Sliding/pop-up roof 190, 292
Trunk lid 86
Windows 186
Windows with SmartKey 188
Closing sliding/pop-up roof
In an emergency 292
Cockpit 20, 341
Cockpit management and data system
(COMAND*) 342
Collapsible tire 342
COMAND* 342
COMAND* see separate operating instruc-
tions
Combination switch 102
High beam flasher 102
Turn signals 48
Windshield wipers 49
Consumer information 339
Control and operation of radio
transmitters 230
Control system 109, 342

355 Index
Messages in display 238, 276
Viscosity 342
Engine oil level see Oil level 235
ESP 23, 75, 342
Messages in display 266
Switching off 76
Switching on 77
Synchronizing 266
Warning lamp 261
ETD 342
Safety guidelines 60
ETD (Emergency tensioning device) 64
Ethanol fuel
At the gas station 233
Switching fuels 334
Exterior lamp switch 98
Exterior lamps
Delayed shut-off 127
Exterior rear view mirror
Activating parking position 147Exterior rear view mirrors
Adjusting 40
Parking position for 132
F
Fahrenheit
Setting temperature units 123
Fastening the seat belts 41
Fine adjustment
Cruise control 196
First aid kit 284
Flat tire 301
Inflating the spare tire 304
Lowering the vehicle 306
Mounting the spare wheel 301
Preparing the vehicle 301
Spare wheel 285
Flexible fuel vehicles 334
At the gas station 233
Switching fuels 334
Flexible Service System (FSS) 249, 342Fog lamp, front 101
Fog lamp, rear 101, 294
Fog lamps
Replacing bulbs 293
Fog lamps, front
Messages in display 278
Replacing bulbs 294
Front airbags 61
Front fog lamp
Switching on 101
Front lamps
Bi-Xenon type 296
Halogen-type 295
Messages in display 277, 279
Replacing bulbs 293, 295
Switching on 98
Front seat backrest
Folding backrest back 37
Folding backrest forward 36