2004 BMW 545I SEDAN winter tires

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173Reference
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dently of the fact that tires can reach an age
of 10 years.
Uniform Tire Quality Grading
Quality grades can be found where appli-
cable on the tire sidewall between tread
shoulder and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
All passenger car tires must conform
to Federal Safety Requirements in
addition to these grades.<
Treadwear
The treadwear grade is a comparative rat-
ing 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 g) 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 variations 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 govern-
ment test surfaces of asphalt and concrete.
A tire marked C may have poor traction
performance.
The traction grade assigned to this
tire is based on straight-ahead brak-
ing traction tests, and does not include
acceleration, cornering, hydroplaning, or
peak traction characteristics.<
Temperature
The temperature grades are A Ð the
highest Ð B, and C, representing the tire's
resistance 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 temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. The 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 repre-
sent higher levels of performance on the
laboratory test wheel than the minimum
required by law.
The temperature grade for this tire is
established for a tire that is properly
inflated and not overloaded. Excessive
speed, underinflation, or excessive load-
ing, either separately or in combination,
can cause heat buildup and possible tire
failure.<
RSC Ð Run-flat tires
You will recognize run-flat tires by a circular
symbol containing the letters RSC on the
side of the tire, refer to page 175.
M+S
Winter and all-season tires.
These have better winter properties than
summer tires.
Tire condition
Inspect your tires frequently for treadwear,
signs of damage and for foreign objects
lodged in the tread. Check the tread depth.
Tire tread
The tread depth should not drop below
0.12 in/3 mm, although, for example, Euro-
pean legislation only specifies a minimum
tread depth of 0.063 in/1.6 mm. At tread
depths below 0.12 in/3 mm there is an
increased risk of high-speed hydroplaning,

Wheels and tires
174 even when only small amounts of water are
present on the road surface.
As winter tires display a noticeable loss in
their ability to cope with cold-weather driv-
ing conditions once the tread wears to
below 0.16 in/4 mm, to ensure continued
safety you should always have such tires
replaced.
Wear indicators at the tread-groove base,
refer to arrow, are distributed over the tire's
circumference and are marked on the side
of the tire with TWI Ð Tread Wear Indicator.
These indicators signal at a tread depth of
0.063 in/1.6 mm that the legal wear limit
has been reached.
Tire damage
Unusual vibrations encountered dur-
ing normal vehicle operation can indi-
cate tire failure or some other vehicle
defect. This can, for example, be caused by
driving over curbs. These kinds of prob-
lems may also be signaled by other
changes in vehicle response, such as a
strong tendency to pull to the left or right.
Should this occur, respond by immediately
reducing your speed. Carefully proceed Ð
or have your vehicle towed Ð to the nearest
BMW center or tire dealer to have the
wheels or tires inspected. Tire damage,
extending to sudden and complete loss of
pressure in extreme cases, can pose a
potentially lethal safety hazard for the vehi-
cle's occupants and other road users
alike.<
Replacing wheels/tires
Unprofessional attempts by laymen to
service tires can lead to damage and
accidents. Have this work performed by
skilled professionals only. The technicians
at your BMW center will be glad to assist
you with the required professional knowl-
edge and specialized equipment.<
The correct combination of wheels and
tires is another vital factor in ensuring reli-
able operation of various vehicle systems
such as ABS and DSC.
Have the wheel and tire assemblies bal-
anced every time either a wheel or a tire is
replaced.
BMW does not recommend the use of
retreaded tires, as otherwise driving
safety may be reduced. Possible variations
in the design and the age Ð which could be
substantial Ð of the carcasses can lead to
unusually rapid wear.<
The right wheels and tires
BMW recommends that you use only
wheel and tire combinations that
BMW has tested and approved for your
particular vehicle. Variations in factors such
as manufacturing tolerances mean that
even wheels and tires with identical official
size ratings could actually have different
dimensions than the approved units Ð these
differences could lead to body contact, and
with it the risk of severe accidents. If non-
approved wheels and tires are used, BMW
cannot evaluate their suitability, and there-
fore cannot be held liable for driving
safety.<
To maintain good handling and vehicle
response, use only tires of a single tread
configuration from a single manufacturer.
After a flat tire, always remember to have
the specified wheel and tire combination
remounted on the vehicle as soon as pos-
sible.
Recommended tire brands
BMW tests certain tire brands for each tire
size, classifies them as road-safe and

Mobility
175Reference
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approves them. You can find out about
these at specialized dealers or at your
BMW center. Observe any country-specific
regulations, e.g. on making a correspond-
ing entry in the vehicle documents.
The factory-mounted tires have been spe-
cially selected to provide optimized perfor-
mance when installed on your vehicle; if
properly cared for, they will provide a com-
bination of safety and excellent ride com-
fort.
Run-flat tires
If your BMW is equipped with run-flat tires,
refer to Run-flat tires, only use these tires,
as in the event of a breakdown there is no
spare wheel available.
Special characteristics of winter
tires
BMW recommends winter tires for use in
cold winter driving conditions. Although all-
season M+S tires provide better winter
traction than summer tires, they generally
fail to provide the same levels of cold-
weather performance as winter tires.
When switching to winter tires, observe the
descriptions at Tire condition and Replac-
ing wheels/tires, refer to pages 173
and 174.
Run-flat tires
If your BMW is equipped with run-flat tires,
refer to Run-flat tires. Your BMW center will
advise you if you wish to replace the tires of
your BMW or wish to switch from summer
to winter tires or vice versa.
If you switch from summer to winter tires,
or vice versa, use run-flat tires, as in the
event of a flat there is no spare wheel avail-
able.
Observing speed ratings
Never exceed the maximum speed for
which the winter tires are rated.
Unprofessional attempts by laymen to ser-
vice tires can lead to damage and acci-
dents. Have this work performed by skilled
professionals only. The technicians at your BMW center will be glad to assist you with
the required professional knowledge and
specialized equipment.<
Storage
Always store wheels and tires in a cool, dry
place with as little exposure to light as pos-
sible. Always protect tires against all con-
tact with oil, grease and fuels. Do not
exceed the maximum tire inflation pressure
indicated on the side wall of the tire.
Run-flat tires*
You will recognize run-flat tires by a circular
symbol containing the letters RSC on the
side of the tire. Run-flat tires consist of self-
contained tires and special rims. The tire
reinforcement ensures that the tire retains
some residual safety in the event of pres-
sure drop and driving remains possible to a
restricted degree.
If you switch from summer to winter
tires, or vice versa, use run-flat tires,
as in the event of a breakdown there is no
spare wheel available. In this case, BMW
recommends that you consult your BMW
center. Your BMW center is qualified to
handle run-flat tires and equipped with the
necessary special tools.<
Continuing driving with a damaged
tire
Driving on run-flat tires can continue,
depending on the vehicle load and the
severity of the tire damage, at a maximum
speed of 50 mph/80 km/h.
In the case of complete tire pressure loss,
0 psi/0 kPa, or obvious tire damage, you

Wheels and tires
176 can estimate the possible distance for con-
tinued driving on the basis of the following
guide values:
>With low load:
1 to 2 persons without luggage:
Approx. 155 miles/250 km
>With medium load:
2 persons, luggage compartment full, or
4 persons without luggage:
Approx. 90 miles/150 km
>With full load:
4 persons or more, luggage compart-
ment full:
Approx. 30 miles/50 km.
Drive reservedly and do not exceed a
speed of 50 mph/80 km/h. With infla-
tion pressure loss, the driving characteris-
tics change, for example reduced track sta-
bility on braking, extended braking
distance, and altered self-steering charac-
teristics.
For safety reasons, BMW recommends that
you do not have damaged run-flat tires
repaired and that you consult your BMW
center in this case.<
Snow chains*
BMW only tests certain snow chains, clas-
sifies them as road-safe and approves
them. Consult your BMW center for more
information. BMW recommends only using
these approved, narrow-link snow chains.
These snow chains are approved exclu-
sively for use on summer or winter tires in
pairs on the rear wheels.
Observe the manufacturer's instructions
when installing snow chains.
Do not exceed a vehicle speed of 30 mph/
50 km/h with the chains mounted.
After mounting snow chains, do not
activate the Flat Tire Monitor.
When you are driving with snow chains, it
can be beneficial to switch off DSC briefly,
refer to page 78.<

Replacing components
188 3.Loosen the lug bolts 1/2 a turn
4.Set up the jack beneath the jacking
point closest to the flat tire. Ensure that
the entire surface of the jack's base is in
firm contact with the ground and that
the jack itself is standing completely
vertical, not tilted, and that the fitting on
the top of the jack will align with the
rectangular recess on the vehicle when
you raise it, refer to illustration
5.Jack the vehicle up until the wheel you
are changing is raised from the ground
6.Unscrew the lug bolts and remove the
wheel
7.Remove accumulations of mud or dirt
from the mounting surfaces of the
wheel and hub. Clean the lug bolts
8.Position the new wheel or compact
wheel. Secure the wheel by turning at
least two lug bolts into opposite bolt
holes
9.Screw in the remaining lug bolts.
Tighten all the bolts securely in a diag-
onal pattern
10.Lower the jack and remove it from
beneath the vehicle
11.Tighten the lug bolts in a diagonal pat-
tern
12.Check and correct the tire inflation
pressure at the earliest opportunity.
Protect valve stems and valve stem
seal caps against dirt and contamina-
tion. Dirt in valve stems is a frequent source
of gradual air loss.<
After mounting the wheel or correcting the
inflation pressure, reinitialize the Flat Tire
Monitor, refer to page 81.The vehicle jack is designed for
changing wheels only. Do not attempt
to raise another vehicle model with it or to
raise any load of any kind. To do so could
cause accidents and personal injury.
To ensure safety, always have the lug bolts
checked with a calibrated torque wrench
as soon as possible to ensure that they are
tightened to the specified torque.
The tightening torque is 120 Nm.<
Reverse the removal sequence to store the
wheel and tools in the vehicle.
When you mount wheels other than Genu-
ine BMW light-alloy wheels, different lug
bolts may also be required.
Always have damaged tires replaced and
the wheel and tire assembly rebalanced at
the earliest possible opportunity.
Driving with the compact wheel
Drive reservedly and do not exceed a
speed of 50 mph/80 km/h.
The driving characteristics change, for
example reduced track stability on braking,
extended braking distance, and altered
self-steering characteristics in the limit
range. In conjunction with winter tires,
these characteristics are more pro-
nounced.
Only one compact wheel may be
mounted. You should fit wheels and
tires of the original size as quickly as possi-
ble.<
Battery
Battery care
The battery is 100% maintenance-free, i.e.,
the electrolyte will last for the life of the bat-
tery when the vehicle is operated in a tem-
perate climate.
For all questions that regard the bat-
tery, please consult your BMW cen-
ter.<

Everything from A to Z
202
Everything from A to Z
Index
A
ABS Antilock Brake
System 77
Ð indicator lamp 77
Acceleration assistant 54
Accessories, refer to Your
individual vehicle 5
"Activation time" for
independent
ventilation 95
Active cruise control 59
Ð malfunctions 64
Active head restraints,
front 40
Active roll stabilization 80
Active seat 42
Active seat ventilation 42
Active steering 82
Adaptive Head Light 88
"Address book" for
navigation 120
Address for navigation
Ð deleting 120
Ð entering 116
Ð selecting 120
"Add to address book" for
navigation 120
"Add to destination
list" 118
Adjusting temperature for
upper body 93
Adjusting the thigh
support 37
"After door is opened" 39
"After unlocking" 39
Airbags 83
Ð indicator lamp 84
Ð sitting safely 36
Air circulation, refer to
Recirculated air 91
Air distribution
Ð automatic 91
Ð individual 93Air flow, refer to Air
volume 91
Airing, refer to
Ventilation 94
"Air recirculation on /
off" 44
Air vent outlets of
automatic climate
control 90
Air volume 91
AKI, refer to Fuel
specifications 169
Alarm system 32
Ð avoiding unintentional
alarms 33
All around the steering
wheel 10
"All channels" 138
"All doors" 28
All-season tires, refer to
Winter tires 175
"AM", wave-
band 130, 134
Antenna for portable
phone 150
Antifreeze
Ð coolant 179
Ð washer fluid 57
Anti-theft system 27
Anti-trapping mechanism
Ð glass roof 35
Ð windows 34
Approved axle loads, refer
to Weights 200
Approved gross vehicle
weight, refer to
Weights 200
Arrival time, refer to
Computer 71
Ashtray
Ð front 99
Ð rear 100
Assistance window 18Assisting systems, refer to
DSC Dynamic Stability
Control 78
AUC Automatic
recirculated-air
control 91
"Audio" 131
Audio 130
Ð adjusting the tone 131
Ð controls 130
Ð switching on/off 130
Ð volume 131
Audio systems, refer to
Tone control 131
Automatic
Ð air distribution 91
Ð air volume 91
Ð cruise control 58, 59
Ð storing stations 135
Automatic car wash, refer
to Caring for your vehicle
brochure
Automatic climate
control 90
Ð automatic air
distribution 91
Ð settings using the Control
Center 92
Ð switching off 92
Automatic curb monitor 39
Automatic headlamp
control 87
"Automatic programs" 93
Automatic recirculated-air
control AUC 91
Automatic steering wheel
Ð adjustment 43

Reference 209
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Lighting
Ð instruments 88
Ð of the vehicle, refer to
Lamps 87
Lighting of the instruments,
refer to Instrument
lighting 88
Lights, refer to Parking
lamps/low beams 87
Lights on warning 87
Light switch 87
Limit speed, refer to
Limit 72
Loading
Ð securing the load 109
Ð stowing cargo 109
Ð vehicle 108
"Lock after driving off" 30
"Lock button" 28
Locking
Ð from inside 30
Ð from outside 28
Locking and unlocking
doors
Ð from inside 30
Ð from outside 27
Ð setting confirmation
signals 28
"LOGIC7", audio
systems 132
Low beams 87
Ð automatic 87
Ð replacing the bulbs 185
Lower back support, refer
to Lumbar support 38
Lug bolts 188
Ð wrench 187
Luggage compartment 31
Ð capacity 200
Ð locking separately 31
Ð opening/closing, refer to
Luggage compartment
lid 31
Ð opening from the
inside 31
Ð opening from the
outside 31
Ð opening with remote
control 28
Ð socket 100
Ð volume 200Luggage compartment
lid 31
Ð emergency release from
inside luggage
compartment 32
Ð locking separately 31
Ð manual operation 31
Ð opening from the
inside 31
Ð opening from the
outside 31
Ð opening with remote
control 28
Ð unlocking manually 31
Luggage rack, refer to
Roof-mounted luggage
rack 109
Lumbar support 38
LW, waveband 134
M
M+S tires, refer to Winter
tires 175
Maintenance, refer also to
Service and Warranty
Information Booklet for
US models or Warranty
and Service Guide
Booklet for Canadian
models
Maintenance system 181
Malfunction
Ð automatic
transmission 56
Ð Sequential manual
transmission SMG 53
Malfunction warnings, refer
to Check Control 68
Manually controlled
recirculated air 91
"Manual" on the radio 135
Manual operation
Ð door lock 29
Ð fuel filler door 168
Ð glass roof 35
Ð luggage compartment
lid 31
Manual operation with
automatic
transmission 55Manual release, refer to
Manual operation
Manual station tuning 135
Manual transmission 51
"Map, arrow display" 123
"Map, direction of
travel" 124
"Map, facing north" 124
Maximum cooling 91
Maximum roof weight 200
Maximum speed
Ð for winter tires 175
Ð with compact wheel 188
Memory
Ð refer to Key Memory 26
Ð refer to Seat, mirror and
steering wheel
memory 38
Menus, refer to Control
Center 16
Message list of traffic
information 126
Microphone for hands-free
system 151
Mirrors 42
Ð automatic curb
monitor 39
Ð dimming feature 43
Ð heating 43
Ð memory, refer to Seat,
mirror and steering wheel
memory 38
"Missed calls" 155
Missed calls 154
Mobile communications in
the vehicle 108
Mobile Service, refer to
Roadside Assistance 191
Monitor, refer to Control
Center 16
"Monitor display on" 77
Monitoring inflation
pressure, refer to Flat Tire
Monitor 80
Multifunction switch
Ð refer to Turn signal
indicators/headlamp
flasher 56
Ð refer to Wiper/washer
system 57

Reference 213
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
"Shortest route" for
navigation 121
Shortest route for
navigation 121
Shoulder support 37
"Show current
position" 118
"Show destination
position" 118
Side airbags 83
Side marker lamps,
replacing the bulbs 186
Side turn signal indicators,
replacing the bulbs 186
Side window blind, refer to
Roller sun blinds 97
Sitting safely
Ð with airbags 36
Ð with safety belts 36
Ski bag 101
Sliding/tilt sunroof, refer to
Glass roof, electric 34
SMG Sequential manual
transmission 51
"SMS" 156
Snow chains 176
Socket
Ð for Onboard Diagnosis
interface 183
Ð in front passenger
footwell 100
Ð in luggage
compartment 100
Ð refer to Lighter
socket 100
SOS, refer to Starting an
emergency call 190
Sound control, refer to
Tone control 131
Spare fuses 189
Spare key 26
Spare wheel, refer to
Compact wheel 187
Special oils, refer to
Specified engine oils 179
Specified engine oils 179
Speed
Ð winter tires 175
Ð with compact wheel 188
Speed-dependent
volume 132Speedometer 12
"Speed volume", audio
systems 132
Sport program
Ð Dynamic Driving
Control 54
Sports seat 37
Stability control,
refer to Driving stability
control 77
Standard default settings,
audio systems 133
Standing lamps 88
"Start" for stopwatch 73
"Start guidance" 118
Starting, refer to Starting
the engine 49
Starting assistance, refer to
Jump-starting 192
Starting destination
guidance 123
Starting difficulties
Ð at very low
temperatures 49
Starting the engine 49
Start menu on the Control
Display 17
"Start service" 163
Start-up difficulties
Ð jump-starting 192
Station, refer to Radio 134
"Status" 66
Status 67
Status of this Owner's
Manual at time of
printing 5
Steering wheel 11
Ð adjustment 43
Ð buttons on the steering
wheel 11
Ð heating 44
Ð individual button
assignment options 44
Ð memory 38
"Steering wheel
buttons" 44
Steering with variable ratio,
refer to Active steering 82
Steptronic, refer to
Automatic transmission
with Steptronic 54"Stop" for stopwatch 73
"Stopwatch" 73
Stopwatch 73
Storage compartments 99
"Store address" for
navigation 120
"Store" on the radio 136
Storing sitting position,
refer to Seat, mirror and
steering wheel
memory 38
Storing tires 175
Straps, refer to
Loading 109
"Street" for destination
entry 117
Stroke, refer to Engine
data 198
Summer tires, refer to
Wheels and tires 170
Sun blinds 97
SW, waveband 134
Switches, refer to
Cockpit 10
Switching off engine 50
Switching off the tilt alarm
sensor 28
Switching on/off
Ð audio 130
Ð CD changer 130
Ð CD player 130
Ð cooling function 91
Ð navigation voice
instructions 124
Ð portable phone 151
Ð radio 130
Swiveling headlamps, refer
to Adaptive Head Light 88
Symbols 4
T
Tachometer 65
Tail lamps
Ð replacing the bulbs 186
Target cursor for
navigation 118
Technical data 198
Telematic 161
Telephone, refer to
Portable phone 150