automatic transmission BMW 645CI CONVERTIBLE 2005 User Guide

Things to remember when driving
108
Things to remember when driving
Breaking-in
Moving parts need time to adjust to one
another. To ensure that your vehicle continues
to provide optimized economy of operation
throughout an extended service life, we request
that you devote careful attention to the follow-
ing section.
Engine and differential
Up to 1,200 miles/2,000 km:
You should attempt to vary both vehicle and
engine speeds. Until the break-in period has
been completed, you should also refrain from
exceeding an engine speed of 4,500 rpm or a
driving speed of 100 mph/160 km/h.
Always obey all official speed limits.
Avoid full-throttle operation and use of the
transmission's kick-down mode during these
initial miles.
Once you have driven 1,200 miles/2,000 km,
the engine and vehicle speeds can be gradually
increased.
SMG Sequential manual transmission
Do not use the acceleration assistant during the
break-in period, refer to page59.
Tires
Due to technical factors associated with their
manufacture, tires do not achieve their full trac-
tion potential until after an initial break-in
period. Therefore, drive reservedly during the
first 200 miles/300 km.
Brake system
Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve optimized
contact and wear patterns between brake pads
and rotors.
Clutch
The function of the clutch is only at its opti-
mized level after a distance driven of approx.
300 miles/500 km. During this break-in period,
engage the clutch gently.
After component replacement
You should also comply with these break-in
procedures should the components mentioned
above need to be replaced at a later point.
General driving notes
Close the luggage compartment lid
Operate the vehicle only when the lug-
gage compartment lid is completely
closed. Otherwise, exhaust fumes could pene-
trate to the interior of the vehicle.<
If special circumstances should make it abso-
lutely necessary to operate the vehicle with the
luggage compartment lid open:
1.Coupe: close both windows and the glass
sunroof.
Convertible: with closed top, close all win-
dows.
2.Adjust the automatic climate control to sup-
ply a high air volume, refer to page95.
Hot exhaust system
As in all vehicles equipped with a catalytic
converter, extremely high temperatures
are generated in this vehicle. Do not remove the
heat shields installed adjacent to various sec-
tions of the exhaust system, and never apply
undercoating to them. When driving, standing
at idle and while parking, take care to avoid pos-
sible contact between the hot exhaust system
and any highly flammable materials such as hay,
leaves, grass, etc. Such contact could lead to a
fire, and with it the risk of serious property dam-
age as well as personal injury.<

Driving tips
109Reference
At a glance
Controls
Communications
Navigation
Entertainment
Mobility
Mobile communication devices in
vehicle
BMW advises against using mobile com-
munication devices, e.g. portable phones,
inside the vehicle without a direct connection to
an external antenna. Otherwise, the vehicle
electronics and mobile communication device
can influence one another. In addition, there is
no assurance that the radiation emitted during
transmission will be conveyed out of the vehicle
interior.<
Hydroplaning
When driving on wet or slushy roads,
reduce road speed. If you do not, a wedge
of water can form between tires and road sur-
face. This phenomenon is referred to as hydro-
planing, and is characterized by a partial or
complete loss of contact between the tires and
the road surface, ultimately undermining your
ability to steer and brake the vehicle.<
The risk of hydroplaning increases as the tread
depth of the tires decreases, also refer to Mini-
mum tire tread on page171.
Driving through water
Do not drive through water on the road if it
is deeper than 1 ft/30 cm, and then only at
walking speed at the most. Otherwise, the vehi-
cle's engine, the electrical systems and the
transmission may be damaged.<
Using handbrake on inclines.
On inclines, do not hold the vehicle with
the clutch; use the handbrake. Otherwise
greater clutch wear will result.<
SMG Sequential manual transmission
Start off quickly on slopes. Do not hold
the vehicle on a hill by applying the throt-
tle, but engage the handbrake instead. Other-
wise overheating can occur in the transmission
region.<
Braking safely
Your BMW is equipped with ABS as standard. In
situations that require it, it is best to brake with
full force. Since the vehicle maintains steering
responsiveness, you can still avoid possible
obstacles with a minimum of steering effort.
Pulsation at the brake pedal combines with
sounds from the hydraulic circuits to indicate to
the driver that ABS is in its active mode.
Do not drive with your foot resting on the
brake pedal. Even light but consistent
pedal pressure can lead to high temperatures,
brake wear and possibly even brake failure.<
Driving in wet conditions
When driving on wet roads or in heavy rain,
briefly brake with light pedal pressure at inter-
vals of a few miles. Monitor traffic conditions to
ensure that this maneuver does not endanger
other road users. The heat generated in this
process helps dry the pads and rotors to ensure
that full braking efficiency will then be available
when you need it.
Hills
To prevent overheating and thus reduced
efficiency of the brake system, downshift
to a gear in which only minimal brake applica-
tions are needed when descending long or
steep downhill stretches. Even light but consis-
tent pedal pressure can lead to high tempera-
tures, brake wear and possibly even brake fail-
ure.<
You can further enhance the engine's braking
effect by selecting a lower gear in the automatic
transmission's manual mode, downshifting as
far as first gear on extremely steep stretches,
refer to page58. This strategy helps you avoid
placing excessive loads on the brake system.
Never drive with the clutch pressed
or allow the vehicle to coast with the
transmission in Neutral – or with the engine
switched off – there is no engine braking when
the transmission is in Neutral, and no power
assist for brakes and steering when the engine
is not running.

Giving and receiving assistance
188
Towing and tow-starting
Always observe all applicable towing laws
and regulations.<
Never allow passengers to ride in a towed
vehicle for any reason.<
Use tow fitting
The threaded tow fitting is stored in the tool kit
mounted on the inside of the luggage compart-
ment under the floor mat, refer to page180, and
should always remain in the vehicle. It can be
screwed in at the front or rear of the BMW.
To avoid damage to the tow fitting and the
vehicle, observe the following: only use
the tow fitting that comes with the vehicle and
screw it in as far as possible. Use the tow fitting
for towing only on roads. Avoid lateral strains on
the tow fitting, e.g. do not the lift vehicle by the
tow fitting.<
Access to screw thread
Rectangular cover in bumper:
Press the arrow symbol of the cover.
Front
Rear
Being towed
Make sure that the ignition key is in posi-
tion 1, as otherwise the steering wheel
could lock and it would be impossible to steer
the vehicle. There is no power assist with the
engine stopped. This then requires increased
effort for braking and steering. Active steering is
deactivated and larger steering wheel move-
ments are required.<
Switch on the hazard warning flashers depend-
ing on the local regulations. If the electrical sys-
tem fails, mark the vehicle to be towed, e.g. with
a sign or warning triangle in the rear window.
Vehicles with manual transmission
Gearshift lever in idle position
Vehicles with automatic transmission
Selector lever in position N.
Do not exceed a towing speed of 45 mph/
70 km/h and a towing distance of
90 miles/150 km, as otherwise the automatic
transmission may be damaged.<
Vehicles with SMG Sequential manual
transmission
With the ignition switched on, engage selector-
lever position N, then switch off the ignition.
Towing methods
In some countries, towing with tow bars or
ropes in public traffic is not permitted.
Familiarize yourself with the regulations on tow-
ing in the respective country.
With tow bar
The towing vehicle may not be lighter
than the vehicle to be towed, as otherwise
it will not be possible to control vehicle
response.<
The tow fittings used should be on the same
side on both vehicles. Should it prove impossi-
ble to avoid mounting the tow bar at an offset
angle, please observe the following:
>Clearance and maneuvering capability will
be strictly limited during cornering.

Mobility
189Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
>When mounted at an angle, the tow bar will
exert lateral forces, tending to push the
vehicle sideways.
Secure the tow bar to the tow fitting only.
Otherwise to other vehicle parts could
result.<
With tow rope
When starting off in the towing vehicle, make
sure that the tow rope is taut.
To avoid jerking and the associated
stresses on vehicle components when
towing, always use nylon ropes or nylon straps.
Secure the tow rope to the tow fitting only. Oth-
erwise damage to other vehicle parts could
result.<
With tow truck
Have the BMW transported with a tow truck
with a so-called lift bar or on a load bed.
Do not lift vehicle by tow fitting or body
and chassis parts, as otherwise damage
may result.<
Tow-starting
Do not tow-start vehicles with an auto-
matic transmission.
Jump starting, refer to page186.<
Only tow-start vehicles with a catalytic con-
verter with the engine cold. It is better to jump
start the engine, refer to page186.
1.Switch on the hazard warning flashers,
comply with country-specific regulations.
2.Turn the ignition key to position 2.
3.Shift into 3rd gear, vehicles with SMG, see
below.4.Have the vehicle tow-started with the clutch
pedal completely depressed and slowly
release the clutch. After the engine starts,
immediately depress the clutch pedal com-
pletely again.
5.Stop at a suitable location, remove the tow
bar or rope and switch off the hazard warn-
ing flashers.
6.Have the vehicle checked.
Vehicles with SMG Sequential manual trans-
mission:
1.Tow-start in selector lever position N.
2.Select sequential mode. The correct gear
will be selected and engaged automatically.

Technical data
192
Technical data
Engine specifications
Weights
Never exceed either the approved axle loads
or the gross vehicle weight.
645Ci
Displacement
Number of cylinderscu in/cmµ268.4/4,398
8
Maximum output
at engine speedhp
rpm325
6,100
Maximum torque
at engine speedlb ft/Nm
rpm 330/450
3,600
645Ci Coupe 645Ci Convertible
Curb weight
with manual transmission
with automatic transmission/SMGlbs./kg
3,781/1,715
3,792/1,7204,178/1,895
4,189/1,900
Approved gross weight
with manual transmission
with automatic transmission/SMGlbs./kg
4,619/2,095
4,630/2,1004,960/2,250
4,971/2,255
Load lbs./kg 838/380 772/350
Approved front axle load lbs./kg 2,271/1,030 2,381/1,080
Approved rear axle load lbs./kg 2,513/1,140 2,778/1,260
Luggage compartment capacity
Convertible: with convertible top com-
partment floor up, refer to page34cu ft/l 15.9/450
–10.6/300
12.4/350

Everything from A to Z
200 Audio132
– controls132
– switching on/off132
– tone control133
– volume133
Automatic
– air distribution95
– air volume95
– cruise control61,62
– headlamp control91
– service notification160
– steering wheel adjustment,
refer to Easy entry/exit50
– storing stations138
Automatic car washes110
– also refer to the Caring for
your vehicle brochure
Automatic climate control94
– automatic air distribution95
– convertible program97
– settings using Control
Center96
– switching off96
Automatic curb monitor47
"Automatic programs"97
Automatic recirculated-air
control AUC95
Automatic station search137
Automatic transmission with
Steptronic58
– convenience start55
– Dynamic Driving Control59
– interlock54
– kick-down58
– selector lever interlock58
– shiftlock58
– starting engine55
– towing188
– tow-starting189
"Automatic ventilation"98
AUTO program with
automatic climate control95
"Autostore" on the
radio136,138
Average fuel consumption74
– setting units77
Average speed74"Avoid ferries" for
navigation123
Avoid freeways for
navigation122
"Avoid highways" for
navigation122
Avoiding unintentional
alarms35
"Avoid tollroads" for
navigation123
Axle loads, refer to
Weights192
"A - Z"153
B
Backrests, refer to Seats44
Backup lamps, refer to
Reverse gear56
Balance, refer to Tone
control134
Balance adjustment in audio
mode, right/left134
Bandages, refer to First-aid
kit186
"Bass", refer to Tone
control134
Bass, refer to Tone
control133
Battery
– jump starting186
– refer to Vehicle battery183
Being towed188
Belts, refer to Safety belts48
Beverage holder, refer to Cup
holders103
Black ice, refer to Ice
warning69
Blower, refer to Air volume95
BMW Assist159
– enabling159
– services offered160
BMW maintenance
system178
"BMW Service"161
"BMW Service settings"159
Bottle holder, refer to Cup
holders103Brake Assistant, refer to DBC
Dynamic Brake Control81
Brake fluid177
– warning lamp177
Brake Force Display86
Brake hydraulic system177
Brake lamps
– Brake Force Display86
– replacing bulbs182
Brake pads177
– breaking-in108
Brake rotors110
Brakes109
– ABS Antilock Brake
System81
– brake fluid177
– Brake Force Display86
– brake pads108,177
– breaking-in108
– CBC Cornering Brake
Control81
– handbrake55
Brake system108
– brake fluid level177
– brake pads108,177
– brake rotors110
– breaking-in108
– warning lamp13,83,177
Brake wear warning
– brake pads177
Braking
– electronic brake-force
distribution81
– refer to Braking safely109
Breakdown assistance161
Breakdown services, refer to
Roadside Assistance186
Breaking-in108
– clutch108
– differential108
Break wear warning
– warning lamp177
"Brightness"77
Buttons on steering wheel11
Bypassing route sections128

Reference 201
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
C
California law
– Event Data Recorders179
California Proposition 65
Warning6
"Call"153
Call
– accepting152
– display accepted153
– ending152
– in absence153
– starting152
Calling
– from phone book153
– from the Top 8 list153
– redialing153
"Call sender"156
Can holder, refer to Cup
holders103
Capacities195
Capacity of the luggage
compartment192
Car battery, refer to Vehicle
battery183
Car care, refer to the Caring
for your vehicle brochure
Car-care products, refer to the
Caring for your vehicle
brochure
"Car data"74
Care, refer to the Caring for
your vehicle brochure
Cargo loading
– securing cargo111
– stowing cargo111
– vehicle110
Caring for artificial leather,
refer to the Caring for your
vehicle brochure
Caring for leather, refer to the
Caring for your vehicle
brochure
Caring for light-alloy wheels,
refer to the Caring for your
vehicle brochure
Caring for plastic, refer to the
Caring for your vehicle
brochureCaring for the carpet, refer to
the Caring for your vehicle
brochure
Caring for the vehicle finish,
refer to the Caring for your
vehicle brochure
Car keys, refer to Key set28
Car phone151
– installation location, refer to
Center armrest102
– refer to Portable phone150
– refer to separate Owner's
Manual
Car radio, refer to Radio136
Car wash110
– also refer to the Caring for
your vehicle brochure
– refer to Before driving into a
car wash110
Catalytic converter, refer to
Hot exhaust system108
"Categories"141
CBC Cornering Brake
Control81
CBS Condition Based
Service178
"CD"133,143
CD changer143
– controls132
– fast forward/reverse145
– installation location145
– playing a track145
– random play sequence145
– repeating a track144
– selecting a CD144
– selecting a track144
– switching on/off132
– tone control133
– volume133
CD player143
– controls132
– fast forward/reverse145
– playing a track145
– random play sequence145
– repeating a track144
– selecting a track144
– switching on/off132
– tone control133
– volume133Center armrest
– adjusting the height102
– front102
Center console14
"Central locking"29
Central locking system29
– from inside vehicle31
Changes, technical, refer to
For your own safety6
Changing a wheel183
Changing gear
– automatic transmission with
Steptronic58
Changing language on
Control Display78
Changing measurement units
on Control Display77
Changing wheels183
CHECK button73
Check Control71
"Check Control
messages"73
Check Gas Cap166
Checking the air pressure,
refer to Tire inflation
pressure168
Child's seats, refer to Child-
restraint systems52
Child-restraint fixing system
LATCH53
Child restraints52
Child-restraint systems52
Chrome parts, care, refer to
the Caring for your vehicle
brochure
Cigarette lighter103
Cleaning, refer to the Caring
for your vehicle brochure
Cleaning the windshield, refer
to Wiper system61
"Climate"96
Clock69
– 12h/24h mode78
– setting time and date78
Closing
– from inside31
– from outside29
Clothes hooks, Coupe102
Cockpit10

Reference 205
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
G
Garage-door opener, refer to
Integrated universal remote
control100
Gasoline
– refer to Fuel
specifications167
– refer to Required fuel167
Gasoline display, refer to Fuel
gage70
Gear changes
– SMG Sequential manual
transmission57
Gear display
– automatic transmission with
Steptronic58
– SMG Sequential manual
transmission57
Gearshift lever
– automatic transmission with
Steptronic58
– manual transmission56
– SMG Sequential manual
transmission56
General driving notes108
Glass sunroof, electric with
raise function37
– convenience operation31
– moving manually38
– remote control30
Glove compartment101
– rechargeable flashlight101
GPS navigation, refer to
Navigation system114
Grills, refer to Ventilation94
Gross vehicle weight, refer to
Weights192
H
Handbrake55
– indicator lamp13,55
Hands-free system14,151
Hazard warning flashers15
Head airbags86
Headlamp control,
automatic91Headlamp flasher60
Headlamps
– care, refer to the Caring for
your vehicle brochure
– cleaning, refer to Wiper
system61
– replacing bulbs180
Head Light, refer to Adaptive
Head Light92
Head-Up Display88
Heated mirrors50
Heated rear window94
Heated seats49
Heated steering wheel51
Heater95
Heating
– exterior mirrors50
– interior94
– rear window94
– residual heat mode96
– seats49
– steering wheel51
Heating with engine switched
off, refer to Residual heat
mode96
Heavy cargo, refer to Securing
load111
Height, refer to
Dimensions193
Height adjustment
– seats45
– steering wheel50
High beams92
– headlamp flasher92
– indicator lamp13
– replacing bulbs180
Hills109
Holder for cups103
"Home address"122
Hood174
Horn10
Hotel function32
Hot exhaust system108
"Hour memo"78
"House number" for desti-
nation entry117Hydraulic Brake Assistant,
refer to DBC Dynamic Brake
Control81
Hydroplaning109
– also refer to Minimum tread
depth171
I
Ice warning69
iDrive, refer to Control
Center16
Ignition key28
Ignition key positions, refer to
Ignition lock54
Ignition lock54
Increasing luggage
compartment capacity,
Convertible34
Independent ventilation
– activating an activation
time98
– setting activation time98
– switching on and off
directly98
Indicator/warning lamps
– ABS Antilock Brake
System83
– active steering85
– airbags87
– brake system13,83
– DSC Dynamic Stability
Control13,83
– DTC Dynamic Traction
Control13,82
– fastening safety belts49
– Flat Tire Monitor85
– fog lamps13,92
– handbrake55
Indicator and warning lamps,
overview13
Individually assignable
buttons on steering wheel,
refer to Programmable
buttons on steering
wheel51
Individual settings, refer to
Key Memory28

Everything from A to Z
206 Inflation pressure, refer to Tire
inflation pressure168
Inflation pressure monitoring,
refer to Flat Tire Monitor84
Information
– on another location118
– on current position118
– on destination location118
"Information" for
navigation118
"Information on
destination"119
Initializing, refer to Power
failure184
"Input map"118
Inside rearview mirror,
automatically dimming, refer
to Automatic functions50
Installation location
– CD changer145
– navigation drive114
Instructions for navigation
system, refer to Voice
instructions126
Instrument cluster12
Instrument illumination, refer
to Instrument lighting93
Instrument lighting93
Instrument panel, refer to
Instrument cluster12
Integrated universal remote
control100
Interesting destination118
"Interim time"77
Interior lamps93
– remote control30
Interlock, refer to Steering
locked54
Interlock on automatic
transmission54
Intermittent mode of the
wipers60
J
Jacking points183
Joystick, refer to Control
Center16
Jumpering, refer to Jump
starting186
Jumping, refer to Jump
starting186
Jump starting186
K
Key Memory28
"Keypad"155
Keys28
Kick-down
– automatic transmission with
Steptronic58
– SMG Sequential manual
transmission57
Knock control167
L
Lamps, refer to Parking lamps/
low beams91
Lamps and bulbs180
"Languages"78
"Languages" for
navigation126
Lashing eyes, refer to
Securing load111
Last destinations, refer to
Destination list119
"Last seat pos."46
LATCH child-restraint fixing
system53
LEDs Light-emitting
diodes183
Length, refer to
Dimensions193
Letter symbol with portable
phone155
License plate lamps, replacing
bulbs182
"Light"60,91
Light-emitting diodes
LEDs183Lighter103
Lighter socket103
Lighting
– instruments93
– of the vehicle, refer to
Lamps91
Lights on warning91
Light switch91
"Limit"76
"Lock after driving"32
Lock buttons in the doors,
refer to Locking32
Locking
– from inside32
– from outside30
Locking and unlocking doors
– from inside31
– from outside29
"LOGIC7", refer to Tone
control134
Low beams91
– automatic91
– replacing bulbs180
Lower back support, refer to
Lumbar support45
Luggage compartment
– capacity192
– emergency release33
– hotel function32
– increasing capacity,
Convertible34
– opening/closing, refer to
Luggage compartment
lid33
– opening from inside33
– opening from outside33
– opening with remote
control30
Luggage compartment lid32
– emergency operation33
– emergency release33
– opening from inside33
– opening from outside33
– opening with remote
control30
– unlocking manually33
Lumbar support45
LW, waveband136

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