2005 BMW 645CI COUPE&CONVERTIBLE winter tires

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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 Vehi-
cle Safety Standard No. 109. Grades B and A
represent 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 loading, either sep-
arately or in combination, can cause heat
buildup and possible tire failure.<
RSC – 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 page172.
M+S
Winter and all-season tires.
These have better winter properties than sum-
mer tires.
Tire condition
Inspect your tires frequently for tread wear,
signs of damage and foreign objects lodged in
the tread, and check the tread depth.
Minimum tread depth
The tread depth should not drop below 0.12 in/
3 mm, although, for example, European legisla-
tion 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,
even when only small amounts of water are
present on the road surface.
Winter tires noticeably loose their suitability for
winter use below a tread depth of 0.16 in/4 mm. New tires should be mounted in the interest of
safety.
Wear indicators at the tread-groove base, refer
to arrow, are distributed over the tire's circum-
ference and are marked on the side of the tire
with TWI – Tread Wear Indicator. If the indica-
tors are at the level of the profile, the legal per-
missible tread depth of 0.063 in/1.6 mm has
been reached.
Tire damage
Due to low-profile tires, please note that
wheels, tires and suspension parts are
more susceptible to road hazard and conse-
quential damages.
Unusual vibrations encountered during normal
vehicle operation can indicate tire failure or
some other vehicle defect. This can, for exam-
ple, be caused by driving over curbs. These
kinds of problems may also be signaled by other
changes in vehicle response, such as a strong
tendency to pull to the left or right.
In these cases reduce your speed immediately
and have the wheels and tires inspected imme-
diately. To do this, carefully drive to the next
BMW center or a specialized tire dealer which
works with personnel trained in accordance
with BMW specifications. Have the vehicle
towed to the workshop if necessary.
Tire damage can be extremely dangerous to
vehicle occupants and other road users.<
Unprofessional attempts by laymen to
service tires can lead to damage and acci-
dents. Have this work performed by skilled pro-
fessionals only. The technicians at your BMW
center will be glad to assist you with the
required professional knowledge and special-
ized equipment.<

Wheels and tires
172
Run-flat tires
You will recognize run-flat tires by the circular
symbol containing the letters RSC on the side-
wall.
Run-flat tires consist of self-contained tires and
special rims. The sidewall reinforcement
ensures that the tire retains some residual
safety in the event of pressure drop and driving
remains possible to a restricted degree.
New wheels and tires
Only have new wheels and tires mounted
by a BMW center or a specialized tire
dealer which works with personnel trained in
accordance with BMW specifications. If this
work is performed inexpertly, there is a danger
of damage and associated safety risks. Make
sure that the new wheels are balanced.<
Retreaded tires
BMW does not recommend the use of
retread tires, as otherwise driving safety
may be reduced. Possible variations in the
design and the age – which could be substan-
tial – of the carcasses can lead to more rapid
wear.<
The right wheels and tires
If you switch from summer to winter tires, or
vice versa, use run-flat tires, as in the event of a
flat tire there is no spare tire available. Your
BMW center will be glad to advise you.
For safety reasons, BMW recommends
that you do not have damaged run-flat
tires repaired; they should be replaced. wheel and tire combinations that BMW
has tested and approved for your particular
vehicle. Variations in factors such as manufac-
turing tolerances mean that even wheels and
tires with identical official size ratings could
actually have different dimensions than the
approved units – these differences could lead to
body contact, and with it the risk of severe acci-
dents. If non-approved wheels and tires are
used, BMW cannot evaluate their suitability,
and therefore cannot be held liable for driving
safety.<
You can find out the right wheel-tire combina-
tion from your BMW center.
The right wheel-and-tire combination is
another vital factor in ensuring reliable opera-
tion of various vehicle systems such as ABS
and DSC.
To maintain good handling and vehicle
response, use only tires of a single tread config-
uration 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 possible.
Recommended tire brands
BMW tests certain tire brands for each tire size,
classifies them as road-safe and approves
them. Consult your BMW center for more infor-
mation. Observe any country-specific regula-
tions, e.g. on making a corresponding entry in
the vehicle documents.
The factory-mounted tires have been specially
selected to provide optimized performance
when installed on your vehicle; if properly cared
for, they will provide a combination of safety and
excellent ride comfort.
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.

Mobility
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Run-flat tires
If you switch from summer to winter tires, or
vice versa, use run-flat tires, refer to page172,
as in the event of a flat tire there is no spare tire
available. Your BMW center will be glad to
advise you.
Watch speed
Observe the permissible maximum speed
for the respective winter tires, as other-
wise tire damage and occur and cause acci-
dents.<
Storage
Always store wheels and tires in a cool, dry
place with as little exposure to light as possible.
Always protect tires against all contact with oil,
grease and fuels. Do not exceed the maximum
tire inflation pressure indicated on the side wall
of the tire.
Snow chains*
BMW only tests certain fine-link snow chains,
classifies them as road-safe and approves
them. Consult your BMW center for more infor-
mation. BMW recommends using these
approved snow chains. These snow chains are
approved exclusively for use in pairs on the rear
wheels with the tire size:
>245/50 R 17 Y
>245/45 R 18 Y
Observe the chain manufacturer's instructions
when mounting snow chains. Do not exceed a
vehicle speed of 30 mph/50 km/h with the
chains mounted.
Do not initialize the Flat Tire Monitor after
mounting snow chains.
When you are driving with snow chains, it can
be beneficial to switch off DTC briefly, refer to
page82.<

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1.Push a screwdriver from the left under the
lamp and lever up the lamp to the right.
2.Turn the bulb holder 905 to the left and
remove.
3.Remove and replace the bulb.
LEDs Light-emitting diodes
Light-emitting diodes installed behind translu-
cent lenses serve as the light source for many of
the controls and displays in your vehicle. These
light-emitting diodes, which operate using a
concept similar to that applied in conventional
lasers, are officially designated as Class 1 light-
emitting diodes.
Do not remove the covers, and never
stare into the unfiltered light several
hours, as irritation of the retina could result.<
Changing a wheel
Your BMW is equipped with run-flat tires as
standard. An immediate wheel change in the
event of a flat tire is therefore no longer
required.
You will recognize run-flat tires by a circular
symbol containing the letters RSC on the side
of the tire, refer to Run-flat tires on page171.
If you have new tires mounted or switch from
summer to winter tires, or vice versa, use run-
flat tires, as in the event of a flat tire there is no
spare tire available. Your BMW center will be
glad to advise you.
Also refer to New wheels and tires, page172.
Car jacking points
The jacking points for the car jack are located in
the positions shown.
The suitable tools for changing tires are
available as accessories from your BMW
center.<
Vehicle battery
Battery care
The battery is 100 % maintenance-free, i.e., the
electrolyte will last for the life of the battery
when the vehicle is operated in a temperate cli-
mate.
Your BMW center will be glad to advise in all
matters concerning the battery.
Charging battery
Only charge the battery in the vehicle via the
terminals in the engine compartment with the
engine switched off. For the connections, refer
to Jump starting on page186.
Disposal
After replacement, have old batteries dis-
posed of by your BMW center or deposit
them at a recycling center. Maintain the battery
in an upright position for transport and storage.
Always secure the battery to prevent it from tip-
ping over during transport.<

199Reference
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Mobility
Everything from A to Z
Index
"..." Identifies Control Display
texts used to select
individual functions,
pointing out where these are
located.
A
ABS Antilock Brake
System81
– indicator lamp83
– malfunction83
ACC, refer to Active cruise
control62
Acceleration assistant with
SMG59
Accessories, refer to Your
individual vehicle5
Activated-charcoal filter97
"Activation time" for
independent ventilation98
Active cruise control62
– indicator lamps64
– malfunction68
– selecting distance65
Active roll stabilization83
Active steering85
– initializing system86
– warning lamp85
Adapting temperature in
upper body region97
Adaptive brake lamps, refer to
Brake Force Display86
Adaptive Head Light92
"Add digits" for portable
phone153
"Address book" for
navigation120
Address for navigation
– deleting121
– entering115
– selecting120
– storing current position120"Add to destination list"117
Adhesive bandages, refer to
First-aid kit186
Adjusting the temperature
with automatic climate
control95
Adjusting the thigh support45
Adjusting tone during audio
operation, refer to Tone
control133
"After opening door"46
"After unlocking"46
Airbags86
– deactivating, Coupe52
– sitting safely44
– warning lamp87
Air distribution
– automatic95
– manual96
Airing, refer to Ventilation97
Air recirculation, refer to AUC
Automatic recirculated-air
control95
"Air recirculation on / off"51
Air vents, refer to
Ventilation94
Air volume95
AKI, refer to Fuel
specifications167
Alarm system34
– avoiding unintentional
alarms35
– interior motion sensor35
– switching off alarm34
– switching off tilt alarm
sensor and interior motion
sensor35
– tilt alarm sensor35
All around the center
console14
All around the steering
wheel10
"All channels"141"All doors"29
All-season tires, refer to
Winter tires172
"AM", reception
range133,136
Antenna for portable
phone150
Antifreeze
– coolant176
– washer fluid61
Antilock Brake System
ABS81
– indicator lamp83
Anti-theft alarm system, refer
to Alarm system34
Anti-theft system29
Anti-trapping mechanism
– glass sunroof38
– power windows37
Approved axle loads, refer to
Weights192
Approved gross vehicle
weight, refer to Weights192
Armrest, refer to Center
armrest102
Arrival time
– refer to Computer75
– refer to Starting destination
guidance124
"Arrow display" during
Navigation127
Ashtray103
Assist, refer to BMW
Assist159
Assistance systems, refer to
Driving stability control
systems81
Assistance window20
"Assist. window off"21
AUC Automatic recirculated-
air control95
"Audio"133

Reference 207
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
M
M+S tires, refer to Winter
tires172
Maintenance, refer to the
Service and Warranty Infor-
mation Booklet for US
models or to the Warranty
and Service Guide Booklet
for Canadian models178
Maintenance system178
Malfunction
– convertible top41
– door lock31
– fuel filler door166
– glass sunroof38
– luggage compartment
lid32,33
Malfunction warnings, refer to
Check Control71
Manual air distribution96
Manual mode with automatic
transmission with
Steptronic58
"Manual" on the radio137
Manual operation
– convertible top41
– door lock31
– driver's door31
– fuel filler door166
– glass sunroof38
– luggage compartment
lid32,33
Manual transmission56
Map
– changing scale127
– destination entry117
"Map, direction of travel"127
"Map, facing north"127
Map facing north127
Master key with remote
control28
Maximum cooling95
Maximum speed with winter
tires173Memory
– refer to Key Memory28
– refer to Seat, mirror and
steering wheel memory46
Menus, refer to Control
Center16
Microfilter97
Microphone
– for hands-free system151
– for portable phone14
– for voice command
system14
Mirror dimming feature50
Mirrors49
– automatic curb monitor47
– heating50
– memory, refer to Seat, mirror
and steering wheel
memory46
"Missed calls"154
Missed calls153
Mobile communication
devices in vehicle109
Mobile Service, refer to
Roadside Assistance186
Monitor, refer to Control
Center16
"Monitor display on"81
"Monitor on / off"51
Most recent portable phone
numbers153
Multi-function steering wheel,
refer to Buttons on the
steering wheel11
Multifunction switch
– refer to Turn signals/
headlamp flasher60
– refer to Wiper/washer
system60
Music track, finding145
"Mute on / off"51
MW, waveband136
N
"Navigation"115
Navigation destination
– manual entry115
– selecting via map117
Navigation drive, installation
location114
Navigation DVD114
Navigation system114
– address book120
– bypassing route
sections128
– destination entry115
– destination guidance in
assistance window114
– destination list119
– displaying current
position125
– entering a destination
manually115
– looking for interesting
destination118
– navigation DVD114
– route display127
– route list127
– selecting destination using
information118
– selecting destination via
map117
– selecting route criteria122
– starting115
– starting destination
guidance124
– switching off, refer to Termi-
nating/continuing desti-
nation guidance125
– terminating/continuing
destination guidance125
– voice instructions126
– volume adjustment126
"Navigation voice instructions
on"126
Neck support, refer to Front
head restraints47
"New address" for
navigation120
"New destination"115,117

Reference 209
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Pressure monitoring of tires,
refer to Flat Tire Monitor84
Programmable buttons on
steering wheel51
Protective function, refer to
Anti-trapping mechanism
– glass sunroof38
– windows37
R
Radio
– Autostore138
– controls132
– playing stations137
– satellite radio140
– selecting frequency
manually137
– selecting
waveband132,136
– station search137
– station selection136
– station with best
reception138
– storing stations138
– switching on/off132
– tone control133
– volume133
– Weather Band139
Radio-control key, refer to
Master key with remote
control28
Rain sensor of the windshield
washer system61
"Random", random play
sequence145
Random play sequence
– CD changer145
– CD player145
Reading lamps93
Rear lamps, refer to Tail
lamps182
Rearview mirror49
Rear window defroster94
"Received calls"154
Receiving level of portable
phone, refer to Status
information20Reception
– quality139
– radio stations139
– regional station138
Rechargeable flashlight101
Recirculated-air mode, refer
to AUC Automatic recircu-
lated-air control95
Recirculation of air, refer to
AUC Automatic recircu-
lated-air control95
Reclining seat, refer to
Backrest45
Recording times, refer to
Stopwatch77
"Redial" for portable
phone154
Redialing with portable
phone153
Refueling166
Releasing hood174
"Relock door if not
opened"32
Remaining distance
– refer to Computer75
– refer to Cruising range74
Remote control28
– garage-door opener100
– luggage compartment lid30
– malfunction30
Removing condensation from
windows95
"Repeat" in audio mode145
Replacement fuses184
Replacement key, refer to
New keys28
Replacing bulbs, refer to
Lamps and bulbs180
Replacing tires
– changing a wheel183
– new wheels and tires172
Reporting an accident, refer to
Initiating emergency
call185
Reporting safety defects7
Reserve warning, refer to Fuel
gage70
"Reset" for stopwatch77
"Reset" in audio mode135Residual heat mode96
Restraint systems
– for children52
– refer to Safety belts48
Retreaded tires172
Reverse, fast
– CD changer145
– CD player145
Reverse gear
– automatic transmission with
Steptronic58
– manual transmission56
– SMG Sequential manual
transmission57
Road map127
"Roadside Assistance"161
Roadside Assistance186
Roadside parking lamps92
– replacing bulbs182
Rollover protection system on
convertible87
– lowering87
Rope, refer to Towing and
tow-starting188
Rotary pushbutton, refer to
Control Center16
Route122
– bypassing sections128
– changing122,128
– display127
– displaying arrow view127
– displaying map127
– displaying towns/cities and
streets127
– list127
– selecting122
– selecting criteria122
"Route list" for navigation127
Route map127
"Route preference",
changing122
Route selection122
Run-flat tires172
– continuing driving with a
damaged tire85
– flat tire85
– tire inflation pressure168
– tire replacement172
– winter tires173

Reference 211
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
SMG Sequential manual
transmission56
– acceleration assistant59
– breaking-in108
– convenience start55
– Dynamic Driving Control59
– gear display57
– kick-down57
– shiftlock57
– towing188
– tow-starting189
"SMS"155
Snow chains173
Socket103
– for Onboard Diagnostics
interface179
– in front passenger
footwell104
SOS, refer to Initiating
emergency call185
Sound output for Enter-
tainment on/off133
Spare fuses184
Spare key28
Special oils, refer to Specified
engine oils176
Specified engine oils176
Speed-dependent
volume134
Speed limit76
Speed limit warning, refer to
Speed limit76
Speedometer12
"Speed volume", refer to Tone
control134
Speed with winter tires173
Sport program
– automatic transmission with
Steptronic58
– refer to Dynamic Driving
Control59
Stability control, refer to
Driving stability control
systems81
"Star button"51
"Start" for stopwatch77
"Start guidance"117,124Starting difficulties, refer to
Special starting
conditions54
Starting engine54
Starting problems
– jump starting186
Start menu on Control
Display17
"Start route guidance"118
"Start service"161
"State / Province" for desti-
nation entry116
"State inspection"71
Station, refer to Radio136
"Status"70
Status of this Owner's Manual
at time of printing5
Steering wheel11
– adjustment50
– automatic adjustment, refer
to Easy entry/exit50
– buttons on steering
wheel11
– heating51
– memory46
– programmable buttons51
"Steering wheel buttons"51
Steering with variable ratio,
refer to Active steering85
Steptronic, refer to Automatic
transmission with
Steptronic58
"Stop" for stopwatch77
"Stopwatch"77
Stopwatch77
Storage compartments102
"Store current
destination"122
"Store current position"122
"Store in address book" for
navigation120
"Store" on the radio138,142
Storing current position120
Storing sitting position, refer
to Seat, mirror and steering
wheel memory46
Storing tires173Straps, refer to Loading111
"Street" for destination
entry117
Summer tires, refer to Wheels
and tires168
SW, waveband136
Switches, refer to Cockpit10
Switching navigation voice
instructions on/off126
Switching off engine55
Switching off the interior
motion sensor35
Switching off the tilt alarm
sensor35
Switching on
– audio132
– CD changer132
– CD player132
– radio132
Switching on hour signal78
Switching the cooling function
on and off95
Swiveling headlamps, refer to
Adaptive Head Light92
Symbols4
– indicator and warning
lamps13
T
Tachometer69
Tail lamps182
– replacing bulbs182
Tank capacity, refer to Fuel
tank capacity166
Target cursor for
navigation118
Technical changes, refer to
For your own safety6
Technical data192
Telematik, refer to
TeleService, BMW
Assist159
Telephone
– refer to Portable phone150
– refer to separate Owner's
Manual
"Telephone list"51