inflation pressure MERCEDES-BENZ C CLASS COUPE 2004 Owners Manual

Contents
Opening and closing the roller sun-
blinds for the
panorama sliding/pop-up roof ..... 189
Opening and closing the
panorama sliding/pop-up roof ..... 190
Synchronizing the
panorama sliding / pop-up roof
and the roller sunblinds ............... 193
Driving systems ................................. 194 Cruise control .............................. 194
Loading.............................................. 197 Roof rack*.................................... 197
Luggage cover.............................. 197
Split rear bench seat .................... 197
Loading instructions..................... 199
Useful features .................................. 200 Interior storage spaces ................ 200
Ashtrays ....................................... 203
Cigarette lighter ........................... 204
Telephone* .................................. 205
Tele Aid* ...................................... 206
Garage door opener ..................... 214
Operation ......................................... 221
The first 1000 miles (1500km) .......... 222 Driving instructions ............................ 223
Drive sensibly – save fuel.............. 223
Drinking and driving ...................... 223
Pedals ........................................... 223
Power assistance .......................... 223
Brakes........................................... 224
Driving off ..................................... 225
Parking.......................................... 225
Tires .............................................. 226
Hydroplaning................................. 227
Tire traction .................................. 227
Tire speed rating ........................... 228
Winter driving instructions ............ 228
Standing water.............................. 229
Passenger compartment ............... 230
Driving abroad .............................. 230
Control and operation of
radio transmitter ........................... 230
Catalytic converter........................ 231
Emission control ........................... 231
Coolant temperature..................... 232
At the gas station ............................... 233 Refueling....................................... 233
Check regularly and
before a long trip .......................... 234
Engine compartment .......................... 236 Hood ............................................. 236
Engine oil ...................................... 237
Transmission fluid level ................ 241
Coolant level ................................. 241
Battery .......................................... 242
Windshield washer system and
headlamp cleaning system ........... 243
Tires and wheels ................................ 244 Important guidelines ..................... 244
Life of tire ..................................... 245
Direction of rotation ..................... 245
Checking tire inflation pressure .... 245
Rotating wheels ............................ 246
Winter driving ..................................... 247 Winter tires ................................... 247
Block heater (Canada only) ........... 248
Snow chains ................................. 248
Maintenance ...................................... 249 Clearing the service indicator ....... 249
Service term exceeded ................. 249
Calling up the service indicator .... 250
Resetting the service indicator ..... 250
Vehicle care ....................................... 251 Cleaning and care of the vehicle ... 251

235
Operation
At the gas station
Engine oil level
For more information on engine oil, see
“Engine oil” (
page 237).
Opening hood, see (
page 236).
Coolant
For normal replenishing, use water (pota-
ble water quality). For more information on
coolant, see “Coolant level” (
page 241) Vehicle lighting
Check function and cleanliness. For infor-
mation on replacing light bulbs, see “Re-
placing bulbs” (
page 293).
Exterior lamp switch (
page 98).
Tire inflation pressure
For information on tire inflation pressure,
see “Checking tire inflation pressure”
(
page 245).
!If you find that the brake fluid in the
brake fluid reservoir has fallen to the
minimum mark or below, have the
brake system checked for brake pad
thickness and leaks immediately. Noti-
fy an authorized Mercedes-Benz Center
immediately. Do not add brake fluid as
this will not solve the problem. For
more information, see “Practical Hints”
(page 259).

245
Operation
Tires and wheels
Life of tire
The service life of a tire is dependent upon
varying factors including but not limited to:

Driving style


Tire pressure


Distance driven
Direction of rotation
Unidirectional tires offer added advantag-
es, such as better aquaplaning perfor-
mance. To benefit, however, you must
ensure that the tires rotate in the direction
specified.
An arrow on the sidewall indicates the in-
tended direction
of tire rotation.Checking tire inflation pressure
Correct the tire pressure only when tires
are cold.
Regularly check your tire pressure at inter-
vals of no more than 14 days. If the tires are warm you should only cor-
rect the tire pressure if it is too low for cur-
rent operating conditions.
A table on the fuel filler flap lists the spec-
ified tire inflation pressures for warm and
cold tires as well as for various operating
conditions.
Warning!
G
Tires and spare tire should be replaced after
six years, regardless of the remaining tread.!Keep unmounted tires in a cool, dry
place with as little exposure to light as
possible. Protect tires from contact
with oil, grease and gasoline.
Warning!
G
If the tire pressure drops repeatedly:

Check the tires for punctures from for-
eign objects.


Check to see whether air is leaking from
the valves or from around the rim.
iThe pressures listed for light loads are
minimum values offering high driving
comfort.
Increased inflation pressures listed for
heavier loads may also be used for light
loads. These higher pressures produce
favorable handling characteristics. The
ride of the vehicle, however, will be
somewhat harder. Never exceed the
max. values or inflate tires below the
min. values listed in the fuel filler flap.

246 OperationTires and wheelsTire pressure changes by approximately
1.5 psi (0.1 bar) per 18°F (10°C) of air
temperature change. Keep this in mind
when checking tire pressure where the
temperature is different from the outside
temperature.
Tire temperature and tire pressure are also
increased while driving, depending on the
driving speed and the tire load.Check the spare tire periodically for condi-
tion and inflation. Spare tires will age and
b e c o m e w o r n o v e r t i m e e v e n i f n e v e r u s e d ,
and thus should be inspected and replaced
when necessary.
Rotating wheels
On vehicles with the same wheel size all
around, wheels can be rotated every 3000
to 6000 miles (5 000 to 10 000 km), or sooner if necessary, according to the de-
gree of tire wear. The same direction of tire
rotation must be retained.
Rotate the wheels before the characteris-
tic tire wear pattern becomes visible
(shoulder wear on front wheels and tread
center wear on rear wheels).
Thoroughly clean the inner side of the
wheels after each rotation. Check and en-
sure proper tire inflation pressure.
Warning!
G
Follow recommended inflation pressures.
Do not overinflate tires. Overinflating 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. Underinflated 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 pillar in the driver’s
door opening). Overloading the tires can
overheat them, possibly causing a blowout.Warning!
G
Rotate front and rear wheels only if they are
of the same size.
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
80 lb-ft (110 Nm).
Use only genuine Mercedes-Benz wheel
bolts specified for your vehicle's rims.

305
Practical hints
Flat tire

Open flap
1 on air pump.

Pull out electrical plug 4 and air hose
with the pressure gauge 2.
Observe instructions on air pump label.

Remove the valve cap from valve.

Screw the air hose 2 on to the tire
valve.

Insert electrical plug 4 into vehicle
cigarette lighter socket.

To switch on the air pump turn the
SmartKey in the starter switch to
position 1 (
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 hose 2 and the
union nut 3 can become hot during in-
flation.

To switch off the air pump turn the
SmartKey in the starter switch to
position 0 (
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.

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.

348 IndexAir distributionAdjusting 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, 79 Canceling 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 202 Ashtray 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

371
Index
Tire inflation pressure
Checking 235, 245
Tire speed rating 228, 345
Tire traction 227
Tires 244, 325 Collapsible 342
Consumer information 339
Direction of rotation 245
Driving instructions 226
Retreads 244
Rims and tires 325
Service life 245
Temperature 246
Temperature grades 340
Tread depth 247
Wear pattern 246
Winter 247
Tools 285
Tow-away alarm 25, 79 Arming 79
Disarming 79
Disarming for transport 79
Towing eye bolt (vehicle tool kit) Installing 316
Towing the vehicle 313
Tracking services For stolen vehicle 214
Traction 144, 339, 345
Transmission see Automatic transmission 241
Tread depth (tires) 247
Treadwear 339
Trim panel Opening 318
Trip computer 132
Trip odometer Resetting 107
Trunk Auxiliary fuse box 318
Lighting 104 Opening 85
Trunk lid Closing 86
Emergency release 86
Message in display 283
Turn signal lamps Replacing bulbs 293, 294
Turn signals 48 Additional in mirrors 293
Cleaning lenses 253
Front bulbs 293, 295, 297
Indicator lamps 23
Rear bulbs 294, 299
Turning off Engine 53
U
Units Setting speedometer units 124
Setting temperature units 123
Unlocking 30, 82