2005 BMW Z4 ROADSTER 3.0I winter tires

Reference
At a glance
Controls
Driving tips
Mobility
81
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.
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,
under-inflation, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.<
RSC: Run Flat tires
Run Flat tires are labeled on the sidewall with a
circular symbol containing the letters RSC.
Refer to page82.
M+S
Winter and all-season tires.
These have better winter performance proper-
ties than summer tires.
Tire condition
Inspect your tires frequently for tread wear,
signs of damage and for foreign objects lodged
in the tread. Check the tread depth.
Tire tread
Tread depth should not be allowed to go below
1/8 in / 3 mm even though in Europe, for exam-
ple, the legally specified minimum tread depth
is only 1/16 in / 1.6 mm. Below 1/8 in / 3 mm
tread depth, there is a very high risk of hydro-
planing, even with only small amounts of water
on the road and at relatively moderate speeds.At tread depths below approx. 1/6in/ 4mm,
winter tires display a perceptible decrease in
their ability to cope with winter driving condi-
tions, and should be replaced in the interest of
safety.
Tread wear indicators in the tread-groove base,
see arrow, are distributed around the wheel cir-
cumference and are labeled on the tire sidewall
as TWI, Tread Wear Indicator. At a tread depth
of 1/16 in / 1.6 mm, the indicators signal that the
legally permissible wear limit has been reached.
Wheel/tire damage
Due to low-profile tires, please note that
wheels, tires and suspension parts are
more susceptible to road hazards and conse-
quential damages.<
Unusual vibrations encountered during normal
vehicle operation can indicate tire failure or
some other vehicle malfunction. This type of
problem can be caused by contact with curbs,
etc. This is also true for irregularities in the vehi-
cle's handling characteristics, such as a pro-
nounced tendency to pull to the left or right.
Should this occur, respond by immedi-
ately reducing your speed. Proceed care-
fully to the nearest BMW center or professional
tire center, or have the vehicle towed there.
Tire damage up to and including sudden and
complete air loss can pose an extreme hazard
for both vehicle occupants and other road
users.<

Wheels and tires
82
Run Flat tires fitted
Run Flat tires are labeled on the sidewall with a
circular symbol containing the letters RSC.
Run Flat tires consist of self-supporting tires
and special rims. The tire reinforcement
ensures that driving remains possible to a
restricted degree in the event of pressure drop
or even if the tire is deflated.
Wheel and tire replacement
Have new wheels and tires mounted only
by a BMW center or specialized tire shop
that works according to BMW requirements
with the appropriately trained personnel. Work
that is improperly carried out could result in
consequential damage and pose safety haz-
ards. Make sure that the new wheels are bal-
anced.<
BMW advises against using retreaded
tires, since driving safety may be
impaired. This is due to possible variations in
casing structures and, in some cases, to their
extreme age, factors which can lead to a
decrease in their durability.<
The correct wheels and tires
BMW recommends using only wheels
and tires that have been approved by
BMW for your particular vehicle model, as oth-
erwise body contact and serious accidents can
result despite the use of the same nominal size,
e.g. due to manufacturing tolerances. If non-
approved wheels and tires are used, BMW can-
not evaluate their suitability, and therefore can-
not be held liable for driving safety. mation about the correct wheel and tire combi-
nations for your vehicle.
The correct wheel and tire combination also
affects other systems which would otherwise
be impaired, for example ABS or DSC.
To maintain good handling and vehicle
response, use only tires of a single brand and
tread configuration. In the event of a flat tire,
remount the previous wheel and tire combina-
tion as soon as possible.
Recommended tire brands
BMW tests certain tire brands for each tire size,
classifies them as road-safe and approves
them. You can best find out about these at a
specialized shop, particularly your BMW center.
Observe any country-specific regulations, e.g.
on making a corresponding entry in the vehicle
documents.
The factory-approved radial-ply tires are
matched to your vehicle and have been
selected to provide optimum safety and driving
comfort when used properly.
Run Flat tires
When mounting new tires or replacing summer
tires with winter tires, or vice versa, use Run Flat
tires since no spare wheel is available in the
event of a flat. Your BMW center will be glad to
provide you with more information.
For safety reasons, BMW recommends to
have Run Flat tires replaced, not repaired,
if they are damaged.<
Special characteristics of winter tires
BMW recommends the use of winter tires for
operation under winter road conditions. While
all-season tires with M+S designation provide
better winter traction than summer tires, they
generally do not achieve the full performance of
winter tires.
Observing speed ratings
Never exceed the maximum speed for
which the winter tires are rated. Unpro-
fessional attempts by laymen to service tires

Reference
At a glance
Controls
Driving tips
Mobility
83
can lead to damage and accidents. Have this
work performed by skilled professionals only.
The technicans at your BMW center will be glad
to assist you with the required professional
knowledge and specialized equipment.<
Storage
Store tires in a cool, dry place, protecting them
against light whenever possible. Protect the
tires from contact with oil, grease and fuel. Do
not exceed the maximum tire inflation pres-
sures specified on the tire sidewall.
Snow chains*
Only certain types of snow chains have been
tested by BMW, classified as road-safe and
approved. Consult your BMW center for more
information. BMW recommends using only
approved fine-link snow chains. Use them in
pairs on either summer or winter tires, but only
on both rear wheels.
Comply with all manufacturer's safety precau-
tions when mounting the chains.
Do not exceed a speed of 30 mph / 50 km/h
when using snow chains.
Do not initialize the Flat Tire Monitor after
snow chains have been mounted.
When driving with snow chains, it may be useful
to deactivate the DSC briefly. Refer to
page51.<

Replacement procedures
94 Please contact a BMW center in case of a mal-
function.
License plate lamps
5 watt bulb
1.Push out the lamp with a suitable object and
remove it
2.Replace the bulb.
Snap the lamp back into place.
Light-emitting diodes LEDs
Control elements, display units and other inte-
rior equipment in your vehicle use a light-emit-
ting diode behind a cover as a light source.
These light-emitting diodes are similar to con-
ventional lasers.
Do not remove the covers, and do not
look directly at the unfiltered light for sev-
eral hours. Otherwise, it can lead to retinal irrita-
tion of the eye.<
Changing a wheel
Run Flat tires
Your BMW is equipped with Run Flat tires.
Therefore, the wheel no longer has to be
changed immediately in the event of a loss in
inflation pressure.
Run Flat tires are labeled on the sidewall with a
circular symbol containing the letters RSC.
Refer to page82.
BMW recommends that you consult your BMW
center if you wish to replace the tires of your
B MW , o r change from summe r to winter tire s o r
vice versa.
Your BMW center knows how to work with Run Flat tires and is equipped with the necessary
special tools.
When mounting or replacing summer
tires with winter tires, or vice versa, use
only Run Flat tires since no spare wheel is avail-
able in the event of a flat.<
Jacking points
The jacking points are located at the positions
indicated in the illustration.
Your BMW center can provide you with a
suitable jack as an accessory.<
Vehicle battery
Maintenance
The battery is completely maintenance-free.
This means that the original electrolyte will nor-
mally last for the service life of the battery under
moderate climatic conditions. Your BMW cen-
ter will be happy to advise you if you have any
questions concerning the battery.
Indicator lamp
The indicator lamp lights up:
The battery is no longer being charged.
The alternator drive belt is defective or
there is a malfunction in the charging circuit of
the alternator. Please contact the nearest BMW
center.
If the drive belt is defective, pull over and
switch off the engine immediately to pre-
vent overheating and serious engine damage.
If the onboard supply voltage drops to a very
low level, increased steering effort may also be
necessary.<

Everything from A to Z
106
A
ABS Antilock Brake
System50
– indicator lamp13
Acceleration assistant42
Accessories, refer to
– For your own safety6
– Your individual vehicle5
Accident, refer to Emergency
call96
Acknowledgment signal for
vehicle locking/unlocking16
Activated-charcoal filter63
Adjusting the thigh support29
Air, drying,
refer to Air conditioning
mode59,62
Airbags53
– deactivation33
– indicator lamp12
– passenger airbags indicator
lamp34
– reactivation33
– safe seating position27
Airbag switch33
Air conditioning58
Air conditioning mode
– air conditioning59
– automatic climate control62
Air conditioning mode
switching on/off
manually59,62
Air distribution
– air conditioning59
– automatic climate control62
Airing out, refer to
Ventilation59,63
Air outlets,
refer to Ventilation59,63
Air pressure, refer to Tire
inflation pressure78Air recirculation, refer to
Recirculated air
mode59,62
Air supply/blower
– air conditioning59
– automatic climate control62
AKI, refer to Fuel
specifications76
Alarm system25
– avoiding unintentional
alarms26
All-season tires, refer to
Winter tires81
Antenna, refer to the
Caring for your vehicle
brochure
Antifreeze86,87
– coolant87
– washing fluids86
Antilock Brake System
ABS50
– indicator lamp13
Anti-theft alarm system, refer
to Alarm system25
Anti-theft protection16,25
Approved axle load, refer to
Weights103
Approved engine oils87
Approved gross vehicle
weight, refer to Weights103
Artificial leather, refer to the
Caring for your vehicle
brochure
Ashtray65
Assistant systems,
refer to Dynamic Stability
Control DSC50
AUC Automatic recirculated
air control62Automatic
– air distribution62
– air supply/blower62
– cruise control44
– headlamp control56
– luggage compartment lid
operation19
Automatically dimming
interior rearview mirror31
Automatic car wash, refer to
the Caring for your vehicle
brochure
Automatic climate control61
Automatic recirculated air
control AUC62
Automatic transmission with
Steptronic38
– ignition36
– indicator lamp13
– interlock36
– selector lever lock38
– shiftlock38
– towing the vehicle99
– tow-starting99
AUTO program,
refer to Automatic air
distribution62
Average fuel consumption49
– setting unit of measure48
Average speed49
– setting unit of measure48
Avoiding unintentional
alarms26
Axle loads, refer to
Weights103
B
Backrest, refer to Seat
adjustment28
Backup lamps38
– bulb replacement93
Everything from A to Z
Index

Reference
At a glance
Controls
Driving tips
Mobility
111
Indicator/warning lamp
– airbags54
– alarm system26
– automatic transmission with
Steptronic39
– brakes13
– coolant temperature47
– DSC51
– engine temperature46
– Flat Tire Monitor53
– fog lamps57
– passenger airbags34
– please fasten safety belts30
– reserve46
– sequential manual gearbox
SMG41
Indicator and warning lamps,
overview12
Individual air
distribution59,62
Individual settings, refer to
Vehicle Memory,
Key Memory31
Inflation pressure, tires78
Inflation pressure monitoring,
refer to
– Flat Tire Monitor52
Inspection47
Instrument cluster12
Instrument lighting57
Instrument panel, refer to
Cockpit10
Interior lamps57
– remote control17
Interior motion sensor26
– deactivating26
Interior rearview mirror31
– automatic dimming
feature70
Interior temperature
adjusting59,62
Interlock, refer to
Steering lock36
Intermittent
– operation, wipers43
Interval
– display, service47J
Jack94
Jacking points94
Jets, refer to
Ventilation59,63
Jump-starting97
K
Key Memory31
Keys16
Key switch for passenger
airbags33
Kickdown39
Knock control76
L
Lamps and bulbs91
LATCH, child-restraint
mounting system35
Leather care, refer to the
Caring for your vehicle
brochure
LEDs Light-emitting
diodes94
Length, refer to
Dimensions104
License plate lamps, bulb
replacement94
Light-alloy wheels, care, refer
to the Caring for your vehicle
brochure
Light-emitting diodes
LEDs94
Lighter65
Lighting
of the instruments57
Lights, refer to Parking lamps/
Low beams56
LIGHTS ON warning56
Light switch56
Load, vehicle70
Loads, refer to Cargo
loading70
Loads, securing71
Lock buttons on doors,
refer to Locking18Locking the doors
– from inside18
– from outside17
Locking the vehicle
– from inside18
– from outside16
Low beams56
– automatic56
– bulb replacement92
– indicator lamp, defective
lamp13
Lug bolts, wrench91
Luggage compartment19
– capacity103
– floor panel91
– increasing capacity19
– opening/closing,
refer to Luggage
compartment lid18
– opening from inside the
vehicle19
– opening from the outside18
– opening with remote
control17
Luggage compartment lid18
– emergency operation19
– opening from inside the
vehicle19
– opening from the outside18
– remote control17
M
M+S tires, refer to Winter
tires82
Maintenance, refer to Service
interval display47,89
Maintenance System89
Making telephone calls, refer
to Owner's Manual for
Telephone
Malfunction
– convertible top23
– door lock18
– fuel filler door76
– storage compartments64
Malfunction of electrical
accessory95
Manual convertible top20

Everything from A to Z
112 Manual mode, refer to
Automatic transmission with
Steptronic39
Manual operation
– automatic transmission
interlock38
– door lock18
– driver's door18
– fuel filler door76
– luggage compartment lid18
– power convertible top23
– storage compartments64
Manual transmission38
Manufacturer5
Master key16
– with remote control16
Maximum cooling62
Maximum speed, winter
tires82
MD operation, refer to
Owner's Manual for Radio/
Onboard Computer
Measurements, refer to
Dimensions104
Mechanical seat28
Memory, refer to
– Seat Memory29
– Vehicle Memory, Key
Memory31
Microfilter
– air conditioning59
– automatic climate control63
Microphone, refer to
Preparations for the cellular
phone65
Minidisc operation, refer to
Owner's Manual for Radio/
Onboard Computer
Mirrors31
– heated31
Mobile phone, refer to the
separate Owner's Manual5
Mobile Service96
Modifications, technical, refer
to For your own safety6
Monitoring system for tire
pressures, refer to
– Tire inflation pressure78
M Sports seat29Multifunction steering wheel,
refer to Buttons in the
steering wheel10
Multifunction switch
– turn signal indicators/
headlamp flasher42
– washer/wiper system43
N
Neck supports, refer to Head
restraints28
Nets64
Nylon rope, refer to Towing
and tow-starting99
O
OBD interface socket90
Octane numbers, refer to Fuel
specifications76
Odometer46
Oil, refer to Engine oil
– additives, refer to Approved
oils87
– alternative oils87
– approved oils87
– capacity105
– dipstick86
– indicator/warning lamp13
Oil change intervals,
refer to the Service and
Warranty Information
Booklet for US models,
Warranty and Service Guide
Booklet for Canadian
models
Oil consumption86
Oil filter change105
Oil level86
– checking86
– indicator lamp13
Oil pressure86
– indicator/warning lamp13
Oil sensor86
– indicator lamp13
Oil service47
Oil types87Onboard computer
– button BC48
Onboard computer, refer to
Computer or to the Owner's
Manual for Onboard
Computer
Onboard monitor, refer to
Computer or to the Owner's
Manual for Onboard
Computer
Onboard tool kit91
Opening and closing the
vehicle
– at the door lock17
– from inside18
– from outside16,17
– with the remote
control16,17
Operating elements10
Outlets, refer to
Ventilation59,63
Outside air mode59
– air conditioning59
Outside air mode, automatic
climate control62
Outside temperature
display47
– changing units of
measure48
– in the onboard computer48
P
Paintwork, refer to the Caring
for your vehicle brochure
Parking brake37
– indicator lamp13
Parking lamps/Low beams56
Parking lock, refer to
Parking39
Parts and accessories,
refer to Your individual
vehicle5
Passenger airbags
– deactivation33
– reactivation33
Placing the vehicle in storage,
refer to the Caring for your
vehicle brochure

Reference
At a glance
Controls
Driving tips
Mobility
113
Plastic, refer to the Caring for
your vehicle brochure
Pollen, refer to
– Microfilter59
– Microfilter/activated-
charcoal filter63
Power convertible top21
Power loss
– electric power windows20
Power output, refer to Engine
data102
Power seat29
Power socket65
Power steering, electric42
Power supply interruption
– battery95
Power windows
– initializing20
Power windows protective
function, refer to Trap
protection20
Preparations for the cellular
phone65
Pressure, tires78
Pressure monitoring, tires,
refer to Flat Tire Monitor52
R
Radio, refer to the Owner's
Manual for Radio
Radio navigation, refer to the
separate Owner's Manual
Radio remote control key,
refer to Master keys with
remote control16
Rain sensor43
Reading lamps57
Rear lamps
– bulb replacement93
– indicator lamp, defective
lamp13
Rearview mirror31
Rear window defroster
– air conditioning59
– automatic climate control63
Recirculated air mode
– air conditioning59
– automatic climate control62Recirculating the air, refer to
Recirculated air
mode59,62
Reclining seat, refer to
Seats28
Refueling76
– fuel filler door76
Releasing
– hood84
Remaining distance, refer to
Range49
Remaining distance to next
service47
Remote control16
– luggage compartment lid17
– malfunction17
Replacement key16
Replacement key, refer to
New keys16
Replacement of tires82
– changing a wheel94
– new wheels and tires82
Replacing lamps, refer to
Lamps and bulbs91
Restraint systems
– for children35
– refer to Safety belts30
Reverse
– automatic transmission with
Steptronic39
– manual transmission38
Reverse gear
– sequential manual gearbox
SMG40
Rod antenna, refer to the
Caring for your vehicle
brochure
Rope, refer to Towing and
tow-starting98
RSC Runflat System
Component, refer to Run
Flat tires82
Rubber parts, refer to the
Caring for your vehicle
brochure
Runflat System Component
RSC, refer to Run Flat
tires
82Run Flat tires82
– changing a tire81,82
– changing a wheel94
– flat tire53
– tire inflation pressure78
– winter tires82
S
Safe seating position27
– with airbags27
– with safety belts27
Safety belts30
– care, refer to the Caring for
your vehicle brochure
– safe seating position27
– warning lamp12,30
Safety systems, refer to
– Airbags53
– Antilock Brake System
ABS50
– Dynamic Stability Control
DSC50
Safety tires, refer to Run Flat
tires82
Screwdriver, refer to Onboard
tool kit91
Seat adjustment28
– mechanical28
– M Sports seat29
– power29
Seat heating30
Seat memory29
Seat position, storing29
Seats28
– adjusting the sports seat29
– heating30
– memory, refer to Seat
memory29
– power adjustment29
– safe seating position27
– storing positions29
Securing, locking the vehicle
– from inside18
– from outside17
Securing loads,
refer to Cargo loading71