2012 BMW 640I CONVERTIBLE winter tires

Temperature
The temperature grades are A, the highest, 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. Sus‐
tained 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 Band A represent
higher levels of performance on the laboratory
test wheel than the minimum required by law.
Temperature grade for this tire
The temperature grade for this tire is es‐
tablished for a tire that is properly inflated and
not overloaded. Excessive speed, underinfla‐
tion, or excessive loading, either separately or in
combination, can cause heat buildup and pos‐
sible tire failure.
If necessary, have the vehicle towed.◀
RSC – Run-flat tires
Run-flat tires, refer to page 234, are labeled with
a circular symbol containing the letters RSC
marked on the sidewall.
M+S
Winter and all-season tires with better cold
weather performance than summer tires.
Tire tread
Summer tires
Do not drive with a tire tread depth of less than
0.12 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm.
Winter tires
Do not drive with a tire tread depth of less than
0.16 in/4 mm. Below a tread depth of 0.16 in/4 mm, tires are
less suitable for winter operation.
Minimum tread depth
Wear indicators are distributed around the tire's
circumference and have the legally required
minimum height of 0.063 in/1.6 mm.
They

are marked on the side of the tire with TWI,
Tread Wear Indicator.
Tire damage
General information
Inspect your tires often for damage, foreign ob‐
jects lodged in the tread, and tread wear.
Notes
Indications of tire damage or other vehicle de‐
fects:
▷ Unusual vibrations during driving.
▷ Unusual handling such as a strong tendency
to pull to the left or right.
In case of tire damage
If there are indications of tire damage, re‐
duce your speed immediately and have the
wheels

and tires checked right away; otherwise,
there is the increased risk of an accident.
Drive carefully to the next service center or tire
shop.
If necessary, have the vehicle towed.◀
Repair of tire damage
For safety reasons, the manufacturer of
your vehicle recommends that you do not have
damaged tires repaired; they should be re‐ Seite 232
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Wheels and tires

placed. Otherwise, damage can occur as a re‐
sult.◀
Changing wheels and tires
Mounting
Information on mounting tires
Have mounting and balancing performed
only by a service center or tire specialist.
If this work is not carried out properly, there is
the danger of subsequent damage and related
safety hazards.◀
Wheel and tire combination
Information on the correct wheel-tire combina‐
tion
and rim versions for your vehicle can be ob‐
tained from your service center.
Incorrect wheel and tire combinations impair the
function of a variety of systems such as ABS or
DSC.
To maintain good handling and vehicle re‐
sponse, use only tires with a single tread con‐
figuration from a single manufacturer.
Following tire damage, have the original wheel
and tire combination remounted on the vehicle
as soon as possible.
Approved wheels and tires
The manufacturer of your vehicle recom‐
mends that you use only wheels and tires that
have been approved for your particular vehicle
model.
For example, despite having the same official
size ratings, variations can lead to body contact
and with it, the risk of severe accidents.
The manufacturer of your vehicle cannot evalu‐
ate non-approved wheels and tires to determine
if they are suited for use, and therefore cannot
ensure the operating safety of the vehicle if they
are mounted.◀ Recommended tire brands
For each tire size, the manufacturer of your ve‐
hicle recommends certain tire brands. These
can be identified by a star on the tire sidewall.
With proper use, these tires meet the highest
standards for safety and handling.
New tires
Due to technical factors associated with their
manufacture,

tires do not achieve their full trac‐
tion potential until after an initial breaking-in pe‐
riod.
Drive conservatively for the first 200 miles/
300 km.
Retreaded tires
The manufacturer of your vehicle does not rec‐
ommend the use of retreaded tires.
Retreaded tires
Possibly substantial variations in the de‐
sign and age of the tire casing structures can
limit service life and have a negative impact on
road safety.◀
Winter tires
The manufacturer of your vehicle recommends
winter tires for winter roads or at temperatures
below +45 ℉/+7 ℃.
Although so-called all-season M+S tires do pro‐
vide better winter traction than summer tires,
they do not provide the same level of perform‐
ance as winter tires. Seite 233
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Reference
Mobility Communication Entertainment Navigation Driving tips Controls At a glance

Maximum speed of winter tires
If the maximum speed of the vehicle is higher
than the permissible speed for the winter tires,
then display a corresponding sign in the field of
vision.
You can obtain this sign from the tire spe‐
cialist or from your service center.
Maximum speed for winter tires
Do not exceed the maximum speed for the
winter tires; otherwise, tire damage and acci‐
dents can occur.◀
Run-flat tires
For your own safety, only use run-flat tires. No
spare tire is available in the case of a flat tire. Your
service center will be glad to advise you.
Rotating wheels between axles
The manufacturer of your vehicle advises
against swapping wheels between the front and
rear axles.
This can impair the handling characteristics.
Storage
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 pres‐
sure indicated on the side wall of the tire.
Run-flat tires*
Label RSC label on the tire sidewall. The wheels are composed of special rims and
tires that are self-supporting, to a limited de‐
gree.
The
support of the sidewall allows the tire to re‐
main drivable to a restricted degree in the event
of a pressure loss.
Continued driving with a damaged tire., refer to
page 93
Changing run-flat tires
For your own safety, only use run-flat tires. No
spare tire is available in the case of a flat tire. Your
service center will be glad to advise you.
Snow chains
Fine-link snow chains
Only certain types of fine-link snow chains have
been tested by the manufacturer of your vehicle,
classified as road-safe and recommended.
Consult your service center for more informa‐
tion.
Use
Use only in pairs on the rear wheels, equipped
with the tires of the following size:
▷ 225/55 R 17.
▷ 245/45 R 18.
Follow the chain manufacturer's instructions.
Make
sure that the snow chains are always suf‐
ficiently tight. Retighten as needed according to
the chain manufacturer's instructions.
Do not initialize the Flat Tire Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
Do not initialize the Tire Pressure Monitor after
mounting snow chains, as doing so may result
in incorrect readings.
When driving with snow chains, briefly activate
Dynamic Traction Control if necessary.
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Wheels and tires

Initializing, Flat Tire Monitor
FTM 95
Initializing,
Tire Pressure Mon‐
itor TPM 92
Instrument cluster 14, 74
Instrument cluster, electronic displays 16
Instrument lighting 87
Integral Active Steering 102
Integrated key 32
Integrated universal remote control 128
Intensity, AUTO program 124
Interactive map 150
Interior equipment 128
Interior lamps 87
Interior lamps via remote con‐ trol 37
Interior motion sensor 43
Interior rearview mirror 60
Interior rearview mirror, auto‐ matic dimming feature 60
Intermediate destinations 152
Internet page 6
Intersection, entering for navi‐ gation 147
Interval display, service re‐ quirements 81
iPod/iPhone 185
J
Jacking points for the vehicle jack 246
Jack, refer to Vehicle jack 246
Joystick, automatic transmis‐ sion 72
K
Key/remote control 32
Keyless Go, refer to Comfort Access 41
Key Memory, refer to Personal Profile 33
Kickdown, automatic trans‐ mission 72
Knee airbag 88 L
Lamp replacement
243
Lamp replacement, front 244
Lamp replacement, rear 245
Lamps 84
Lamps and bulbs 243
Lane departure warning 97
Lane margin, warning 97
Language on Control Dis‐ play 80
Lashing eyes, securing cargo 141
LATCH child restraint fixing system 63
Leather, care 255
LEDs, light-emitting di‐ odes 244
Length, vehicle 261
Letters and numbers, enter‐ ing 24
License plate lamp, bulb re‐ placement 245
Light-alloy wheels, care 256
Light control 85
Light-emitting diodes, LEDs 244
Lighting 84
Lighting
via remote control 37
Light switch 84
Load 141
Loading 140
Lock, door 38
Locking/unlocking from in‐ side 39
Locking/unlocking via door lock 38
Locking/unlocking with re‐ mote control 36
Locking, automatic 39
Locking, central 35
Locking via trunk lid 41
Low beams 84
Low beams, automatic, refer to High-beam Assistant 86
Lower back support 54
Lug bolt lock 246
Lumbar support 54 M
Maintenance 241
Maintenance require‐ ments 241
Maintenance, service require‐ ments 81
Maintenance System, BMW 241
Malfunction displays, refer to Check Control 82
Manual air distribution 123
Manual air volume 124
Manual brake, refer to Parking brake 67
Manual mode, transmis‐ sion 73
Manual operation, backup camera 110
Manual operation, door lock 39
Manual
operation, exterior mir‐
rors 59
Manual operation, fuel filler flap 226
Manual operation, Park Dis‐ tance Control PDC 108
Manual operation, Side View 114
Manual operation, Top View 113
Manual transmission 71
Map, destination entry 150
Map in split screen 157
Map view 155
Marking on approved tires 233
Marking, run-flat tires 234
Massage seat, front 55
Master key, refer to Remote control 32
Maximum cooling 124
Maximum speed, winter tires 234
Measure, units of 80
Medical kit 249
Memory for seat, mirrors, steering wheel 58
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Everything from A to Z

Updates made after the edito‐
rial deadline 6
Updating software 191
Upholstery care 256
USB audio interface 185
USB interface 132
V
Variable steering, Integral Ac‐ tive Steering 102
Vehicle battery 247
Vehicle
battery, replacing 247
Vehicle, breaking in 138
Vehicle care 255
Vehicle identification number, refer to Identification number
in the engine compart‐
ment 236
Vehicle jack 246
Vehicle paint 255
Vehicle storage 257
Vehicle wash 254
Ventilation 126
Ventilation, refer to Parked-car ventilation 126
Version of the navigation data 160
Video playback 175
Video playback, iPhone 187
Video playback, snap-in adapter 187
Voice activation, mobile phone 203
Voice activation, short com‐ mands 263
Voice activation system 25
Volume, setting 164
W
Warning lamps 14
Warning messages, refer to Check Control 82
Warning triangle 249
Washer fluid 71
Washer fluid reservoir, ca‐ pacity 262 Washer nozzles, wind‐
shield 71
Washer system 69
Washing, vehicle 254
Water on roads 139
Weather Band 168
Weights 261
Welcome lamps 84
Wheel base, vehicle 261
Wheel change 246
Wheels, changing 233
Wheels, everything on wheels and tires 229
Wheels, Flat Tire Monitor FTM 95
Wheels,
Tire Pressure Monitor
TPM 91
Width, vehicle 260
Wind deflector 50
Window defroster, rear 125
Windows, powered 43
Windshield, climate con‐ trol 139
Windshield washer fluid 71
Windshield washer noz‐ zles 71
Windshield washer system 69
Windshield wiper 69
Windshield wipers, fold-out position 71
Winter storage, care 257
Winter tires, suitable tires 233
Winter tires, tread 232
Wiper blades, replacing 243
Wiper fluid 71
Wiper system 69
Wood, care 256
Word match concept, naviga‐ tion 24
Wrench 243
X
Xenon headlamps, bulb re‐ placement 244 Y
Your individual vehicle
6
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Everything from A to Z