tire MERCEDES-BENZ C320 2004 W203 Owner's Guide

319 Practical hints
Flat tire
The jack take-up brackets are located
directly behind the front wheel housings
and in front of the rear wheel housings.
1Jack
2Take-up bracket
Place jack1 on firm ground.

Position jack1 under take-up
bracket2 so that it is always vertical
(plumb-line) as seen from the side,
even if the vehicle is parked on an
incline.

Jack up the vehicle until the wheel is a
maximum of 1.2 in (3 cm) from the
ground. Never start engine while
vehicle is raised.Removing the wheel
1Alignment bolt

Unscrew upper-most wheel bolt and
remove.

Replace this wheel bolt with alignment
bolt1 supplied in the tool kit.

Remove the remaining bolts.

Remove the wheel.
Warning!
G
The jack is intended only for lifting the
vehicle briefly for wheel changes. It is not
suited for performing maintenance work
under the vehicle.

Never start the engine when the vehicle
is raised.


Never lie down under the raised vehicle.
!Do not place wheel bolts in sand or dirt.
This could result in damage to the bolts
and wheel hub threads.

320 Practical hintsFlat tireMounting the new wheel
1Wheel bolt for light alloy rims
2Wheel bolt for Minispare wheel or other
steel rims (located in trunk with spare
wheel)

Clean contact surfaces of wheel and
wheel hub.

Guide Minispare wheel onto the
alignment bolt and push it on.

Insert wheel bolts and tighten them
slightly.
!Wheel bolts2 must be used when
mounting the Minispare wheel or other
steel rims. The use of any wheel bolts
other than wheel bolts2 for the
Minispare wheel or other steel rims will
physically damage the vehicle’s
brakes.
!To avoid paint damage, place wheel flat
against hub and hold it there while
installing first wheel bolt.Warning!
G
Always replace wheel bolts that are
damaged or rusted.
Never apply oil or grease to wheel bolts.
Damaged wheel hub threads should be
repaired immediately. Do not continue to
drive under these circumstances! Contact
an authorized 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.

321 Practical hints
Flat tire

Unscrew the alignment bolt, install last
wheel bolt and tighten slightly.Lowering the vehicle

Lower vehicle by turning crank
counterclockwise until vehicle is
resting fully on its own weight.

Remove the jack.
1 - 5Wheel bolts

Tighten the five wheel bolts evenly,
following the diagonal sequence
illustrated (1to5), until all bolts are
tight. Observe a tightening torque
of 80 lb-ft (110 Nm).Before storing the jack, it should be fully
collapsed, with handle folded in (storage
position) (
page 302).

Store the jack and the other vehicle
tools in the vehicle tool kit storage well
casing (
page 303).

Store the wheel cover (Canada only)
and the damaged wheel in the trunk.
Warning!
G
Only use genuine equipment
Mercedes-Benz wheel bolts. Other wheel
bolts may come loose.
Do not tighten the wheel bolts when the
vehicle is raised. Otherwise the vehicle
could tip over.
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).

322 Practical hintsFlat tireMounting wheel cover (Canada only)
Wheel cover on vehicles with steel rims
(Canada only)

Position small wheel cover opening
over tire valve and press wheel cover
against wheel rim.

Now press (do not hit) opposite side of
wheel cover against wheel rim until
seated.
Make certain that the springs of the
wheel cover are firmly seated in the
outer rim of the steel wheel.
!The wheel cover does not fit the
Minispare wheel.

335 Technical data
Spare parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive
Engine
Rims and Tires
Electrical system
Main dimensions
Weights
Fuels, coolants, lubricants, etc.
Consumer information

342 Technical dataRims and Tires
Rims and TiresOnly use 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,
exhibit dimensional variations and
different tire deformation characteris-
tics that could cause them to come into
contact with the vehicle body or axle
parts. Damage to the tires or the
vehicle may be the result.
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 pres-
sure should be checked regularly and
should only be adjusted on cold tires.
Follow tire manufacturer’s mainte-
nance recommendation included with
vehicle.

343 Technical data
Rims and Tires
Same size tiresModel
C240
C 240 4MATIC
C320
C 320 4MATIC
C230KompressorSport
C 320 Sport
C230KompressorSport
C320Sport
C32AMG
Rims
(light alloy)
7 J x 16 H2
71/2 J x 17
71/2 J x 17
-
Rims
(steel - Canada only)
7 J x 16 H2
-
-
-
Wheel offset
1.46 in (37 mm)
1.42 in (36 mm)
1.46 in (37 mm)
-
All-season tires
(radial-ply tires)
205/55 R16 91H
-
-
-
Summer tires
(radial-ply tires)
-
-
225/45 R17 91W
1
1Must not be used with snow chains.
-
Winter tires
(radial-ply tires)
205/55 R16 91H M+S
225/45 R17 91H M+S
225/45 R17 91H M+S
205/50 R17 89H M+S
2
or
225/45 R17 91H M+S
1, 2
2Only on rim 7
1/2 J x 17 H2

344 Technical dataRims and TiresMixed size tiresModel
C 230 Kompressor Sport
C320Sport
C32AMG
Front axle:Rims (light alloy)
71/2 J x 17 H2
71/2 J x 17 H2
Wheel offset
1.42 in (36 mm)
1.46 in (37 mm)
Summer tires (radial-ply tires)
225/45 R17 91W
or
225/45 R17 91Y
225/45 R17 91Y
1
or
225/45 ZR17 91Y
1
Rear axle:Rims (light alloy)
81/2 J x 17 H2
81/2 J x 17 H2
Wheel offset
1.34 in (34 mm)
1.34 in (34 mm)
Summer tires (radial-ply tires)
245/40 R17 91W
1
or
245/40 R17 91Y
1
1Must not be used with snow chains.
245/40 R17 91Y
1
or
245/40 ZR17 91Y
1

345 Technical data
Rims and Tires
Minispare wheelModel
C240
C 240 4MATIC
C320
C 320 4MATIC
C230KompressorSport
C320Sport
C32AMG
Rim (steel)
3.5 B x 16 H2
3.5 B x 17 H2
Wheel offset
0.67 in (17 mm)
0.67 in (17 mm)
Tire
T 125/90 R16 98M
1
1Must not be used with snow chains.
T 125/80 R17 99M
1

359 Technical data
Consumer information
Consumer information
The following text is published as required
of all manufacturers of passenger cars
under Title 49, Code of U.S. Federal
Regulations, Part 575 pursuant to the
“National Traffic and Motor Vehicle Safety
Act of 1966”.Uniform tire quality grading
Quality grades can be found, where
applicable, on the tire sidewall between
tread shoulder and maximum section
width. For example:
All passenger car tires must conform to
federal safety requirements in addition to
these grades.Tread Wear
The tread wear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course. For
example, a tire graded 150 would wear
one and one-half (1
1/2) times as well on
the government course as a tire
graded 100. The relative performance of
tires depends upon the actual conditions
of their use, however, and may depart
significantly from the norm due to varia-
tions in driving habits, service practices
and differences in road characteristics and
climate.Traction
The traction grades, from highest to lowest
are AA, A, B, and C. Those grades
represent the tire’s ability to stop on wet
pavement as measured under controlled
conditions on specified government test
surfaces of asphalt and concrete. A tire
marked C may have poor traction
performance.
Tread wear
Traction
Temperature
200
AA
A
Warning!
G
The traction grade assigned to this tire is
based on straight ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.