2005 MERCEDES-BENZ SLR flat tire

279 Operation
Tires and wheels
DOT (D
epartment o
f T
ransportation)
A tire branding symbol which denotes the
tire meets requirements of the
U.S. Department of Transportation.
GAWR (G
ross A
xle W
eight R
ating)
The GAWR is the maximum permissible
axle weight. The gross vehicle weight on
each axle must never exceed the GAWR for
the front and rear axle indicated on the
Certification label located on the driver's
door B-pillar.
GVW (G
ross V
ehicle W
eight)
The GVW comprises the weight of the
vehicle including fuel, tools, spare wheel,
installed accessories, passengers and
cargo and, if applicable, trailer tongue
load. The GWV must never exceed the
GWVR indicated on the Certification label
located on the driver's door B-pillar.GVWR (G
ross V
ehicle W
eight R
ating)
This is the maximum permissible vehicle
weight of the fully loaded vehicle (weight of
the vehicle including all options, passen-
gers, fuel, and cargo and, if applicable,
trailer tongue load). It is indicated on
Certification label located on the driver's
door B-pillar.
Kilopascal (kPa)
The metric unit for air pressure. There are
6.9 kPa to one psi; another metric unit for
air pressure is bars. There are
100 kilopascals (kPa) to one bar.
Maximum load rating
The maximum load in kilograms and
pounds that can be carried by the tire.
Maximum loaded vehicle weight
The sum of curb weight, accessory weight,
vehicle capacity weight and production
options weight.Maximum tire inflation pressure
This number is the greatest amount of air
pressure that should ever be put in the tire
under normal driving conditions.
Normal occupant weight
The number of occupants the vehicle is
designed to seat, multiplied by
68 kilograms (150 lbs).
Occupant distribution
The distribution of occupants in a vehicle
at their designated seating positions.
Production options weight
The combined weight of those installed
regular production options weighing over
5 lbs (2.3 kilograms) in excess of those
standard items which they replace, not
previously considered in curb weight or
accessory weight, including heavy duty
brakes, ride levelers, roof rack, heavy duty
battery, and special trim.

280 OperationTires and wheelsPSI (P
ounds per s
quare i
nch)
A standard unit of measure for air pressure
-> bar, kilopascal (kPa).
Recommended tire inflation pressure
Recommended tire inflation pressure
listed on placard located on driver's door
B-pillar for normal driving conditions.
Provides best handling, tread life and
riding comfort.
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated.
Sidewall
The portion of a tire between the tread and
the bead.TIN (T
ire I
dentification N
umber)
Unique identifier which facilitates efforts
by tire manufacturers to notify purchasers
in recall situations or other safety matters
concerning tires and gives purchases the
means to easily identify such tires. The TIN
is comprised of “Manufacturer's identifica-
tion mark”, “Tire size”, “Tire type code”
and “Date of manufacture”.
Tire load rating
Numerical code associated with the
maximum load a tire can support.
Tire ply composition and material used
This indicates the number of plies or the
number of layers of rubber-coated fabric in
the tire tread and sidewall. Tire manufac-
turers also must indicate the ply materials
in the tire and sidewall, which include
steel, nylon, polyester, and others.Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is approved.
Traction
Force exerted by the vehicle on the road
via the tires. The amount of grip provided.
Tread
The portion of a tire that comes into
contact with the road.
Treadwear indicators
Narrow bands, sometimes called
“wear bars” that show across the tread of
a tire when only
1/6in (1.6 mm) of tread
remains.

282 OperationTires and wheelsThoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.
For information on wheel change, see the
“Practical hints” section (
page 349).
Anti-theft wheel nuts
Your vehicle is equipped with anti-theft
wheel nuts that prevent the theft of your
vehicle’s wheels.
1Anti-theft wheel nut
2Wheel nut key
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
95 lb-ft (130 Nm).
Only use genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.
Warning!
G
Pull the parking brake lever up as many
notches as possible and move the gear se-
lector lever to positionP, before loosening
the wheel bolts. Otherwise the vehicle may
move and cause an accident and/or serious
personal injury. !Do not use air tools, such as an impact
wrench, when installing or removing
the anti-theft wheel nuts. An impact
wrench can damage the anti-theft
wheel nuts and the wheel nut key, or
cause them to malfunction.
!Store wheel bolts and anti-theft wheel
nuts not currently in use in a safe place
to avoid damage to the threads.

Practical hintsWhat to do if ...
Where will I find ...?
Locking/unlocking in an emergency
Replacing SmartKey batteries
Replacing bulbs
Replacing the wiper blades
Flat tire
Batteries
Towing the vehicle
Fuses

331 Practical hints
What to do if ...
Left display
Right display
Possible cause
Possible solution
H
Tire pressure
Caution
tire defect!
The tire inflation pressure in
one or more tires is dropping.

Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic
situation around you.

Temporarily repair tire using TIREFIT (
page 349) or
contact Roadside Assistance. If tire cannot be tempo-
rarily repaired using TIREFIT, contact Roadside Assis-
tance.

Have the damaged wheel repaired or replaced at an
authorized Mercedes-Benz Center.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle.
Continued driving with a flat tire will cause
excessive heat build-up and possibly a fire.
Warning!
G
Have worn or damaged tires replaced in
pairs (front pair or rear pair). Otherwise the
driving stability of the vehicle will be ad-
versely affected.

332 Practical hintsWhat to do if ...Left display
Right display
Possible cause
Possible solution
H
Tire pressure
Check
tires!
The tire inflation pressure in
one or more tires is already be-
low the minimum value.

Carefully bring the vehicle to a halt, avoiding abrupt
steering and braking maneuvers. Observe the traffic
situation around you.

Check the tires. If no damage visible, check and correct
tire inflation pressure as required.

Temporarily repair tire using TIREFIT (
page 349) or
contact Roadside Assistance. If tire cannot be tempo-
rarily repaired using TIREFIT, contact Roadside Assis-
tance.

Have the damaged wheel repaired or replaced at an
authorized Mercedes-Benz Center.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle. You
may lose control of the vehicle.
Continued driving with a flat tire will cause
excessive heat build-up and possibly a fire.
Warning!
G
Have worn or damaged tires replaced in
pairs (front pair or rear pair). Otherwise the
driving stability of the vehicle will be ad-
versely affected.

333 Practical hints
What to do if ...
Left display
Right display
Possible cause
Possible solution
H
Reactivate
tire press. monit.


A tire inflation pressure
warning message ap-
peared.


The tire inflation pressure in
one or more tires was in-
creased by over 0.3 bar.

Activate the tire inflation pressure monitor
(page 266).
Tire pres.
monitor
currently
inactive
The tire inflation pressure mon-
itor is temporarily unable to
monitor the tire inflation pres-
sure due to:

the presence of several
wheel sensors in the vehicle


excessive wheel sensor
temperatures


a nearby radio interference
source


unrecognized wheel sen-
sors mounted

Remove any additional wheel sensors from the vehicle,
e.g. when transporting a new set of tires.
As soon as the causes of the malfunction have been re-
moved, the tire inflation pressure monitor automatically be-
comes active again.

334 Practical hintsWhat to do if ...Left display
Right display
Possible cause
Possible solution
H
Tire pres.
monitor
Visit
workshop!
The tire inflation pressure mon-
itor is malfunctioning or one of
the wheel sensors is malfunc-
tioning.

Have the tire inflation pressure monitor checked by an
authorized Mercedes-Benz Center.
A wheel without proper sensor
was installed.

Have the wheels checked.