2008 BMW 4.8I tire size

Replacing components
252
Removing compact wheel
The compact wheel is located in the cargo bay
under the floor panel.
1.Remove the tool mount.
2.Unscrew the wing nut 1.
3.Remove the washer 2 laterally.
4.Remove the compact wheel.
Preparing wheel change
1.Observe the safety precautions above.
2.Loosen the lug bolts a half turn.
Jacking up vehicle
1.Position the vehicle jack at the jacking point
closest to the wheel so that the entire sur-
face of the jack base rests on the ground
perpendicularly beneath the jacking point.
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.<2.Guide the jack head into the rectangular
recess of the jacking point when cranking
up, refer to illustration detail.
3.Jack the vehicle up until the wheel you are
changing is raised from the ground.
Mounting a wheel
1.Unscrew the lug bolts and remove the
wheel.
2.Remove accumulations of mud or dirt from
the mounting surfaces of the wheel and
hub. Also clean the lug bolts.
3.Position the new wheel or compact wheel.
Secure the wheel by screwing at least two
lug bolts into opposite bolt holes.
When you mount wheels other than Genu-
ine BMW light-alloy wheels, different lug
bolts may also be required.
4.Screw in the remaining lug bolts. Tighten all
the bolts securely in a diagonal pattern.
5.Lower the vehicle and remove the jack from
beneath the vehicle.
After mounting
1.Tighten the lug bolts in a diagonal pattern.
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 speci-
fied torque. Otherwise, incorrectly tight-
ened lug bolts are a hidden safety risk. The
tightening torque is 101 lb ft/140 Nm.<
2.Stow the defective wheel in the cargo bay.
The defective wheel cannot be stored
under the floor panel flap due to its
size.<

Mobility
253Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
3.Check and correct the tire inflation pressure
at the earliest opportunity.
Protect valve stems with valve screw
caps against dirt and contamination.
Dirt in valve stems is a frequent source of
gradual air loss.<
4.Initialize the Flat Tire Monitor, refer to
page92, or reset the Tire Pressure Monitor,
refer to page94.
5.Replace the damaged tire as soon as possi-
ble and have the new wheel/tire balanced.
Driving with 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
pronounced.
Only one compact wheel may be
mounted. Restore the wheels and tires to
their original size as quickly as possible. Failure
to do so is a safety risk.<
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 Sports Activity Vehicle 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. Connections, refer to
Jump starting on page256.
Disposal
Have old batteries disposed of following
replacement at your BMW Sports Activity
Vehicle Center or bring them to a collection
point. Maintain the battery in an upright position
for transport and storage. Always restrain the
battery to prevent it from tipping over during
transport.<
Power failure
After a temporary power loss, the functioning of
some equipment may be limited and require
reinitialization. Individual settings are also lost
and must be updated:
>Seat, mirror and steering wheel memory
The positions must be stored again, refer to
page44.
>Time and Date
The values must be updated, refer to
pages81, 82.
>Radio
Stations must be stored again if necessary,
refer to page168.
>Navigation system
Wait until the system starts, refer to
page159.
Fuses
Never attempt to repair a blown fuse and
do not replace a defective fuse with a sub-
stitute of another color or amperage rating, as
this could lead to a circuit overload, ultimately
resulting in a fire in the vehicle.<
Spare fuses, a pair of plastic tweezers and infor-
mation on the fuse assignment are located near
the fuses in the cargo bay.

Reference 285
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
"Store in address book" for
navigation system146
Storing current position146
Storing radio stations168
Storing sitting position, refer
to Seat, mirror and steering
wheel memory44
Storing tires240
"Street" for destination
entry140
"Subtitles" for DVD system in
rear197
Summer tires, refer to Wheels
and tires234
Switches, refer to Cockpit10
Switching cooling function on
and off109
Switching off engine60
Switching on
– audio162
– CD changer162
– CD player162
– radio162
Switching on hour signal82
Swiveling headlamps, refer to
Adaptive Head Light104
Symbols4
– indicator/warning lamps13
– navigation system156
– traffic information with
navigation system154
T
Tachometer72
"Tailgate"34
Tailgate35
– opening from inside33
– opening from outside33
– opening manually33
Tail lamps249
– replacing bulbs249
Tank contents, refer to
Capacities264
Target cursor for
navigation143
Technical alterations, refer to
For your own safety5Technical data262
Telematic, refer to
TeleService,
BMW Assist223
Telephone
– refer to Mobile phone208
– refer to separate operating
instructions
"Telephone list"53
TeleService225
Temperature
– adjusting in upper body
region108
– adjusting with automatic
climate control108,112
– changing units of
measure82
– refer to Coolant
temperature72
Temperature display
– outside temperature71
– setting units82
– temperature warning71
Temperature warning71
Tempomat, refer to Cruise
control69
"Terminate services"228
"Text language"83
The individual vehicle5
Third brake lamp, refer to
Center brake lamp250
3rd row seats48
Tightening torque of the lug
bolts, refer to After
mounting252
Tilt alarm sensor, switching
off36
Tilting down passenger-side
exterior mirror52
"Time"81
"Time / Date"81
"Time format"82
Timer, refer to Preselecting
activation times114
"Timer 2" for parked car
ventilation114
"Timer 1" for parked car
ventilation114Tire inflation pressure
monitoring, refer to Flat Tire
Monitor92
Tire inflation pressures234
– checking234
Tire Pressure Monitor
TPM94
Tire Quality Grading237
Tires
– age237
– air loss93,95
– breaking-in128
– changing239
– condition238
– damage238
– flat tire, refer to Changing
wheels251
– inflation pressure234
– inflation pressure
monitoring, refer to FTM
Flat Tire Monitor92
– new wheels and tires239
– pressure loss93,95
– pressure monitoring, refer to
TPM Tire Pressure
Monitor94
– replacing251
– retreaded tires239
– run-flat tires239
– size237
– tread238
– wear indicators238
– wheel/tire combination239
– winter tires240
"Title" for DVD system in
rear197
TMC station, refer to Traffic
information154
"Tone"163
– for DVD system in rear197
Tone in audio mode
– adjusting163
– middle setting165
"Tone left" for DVD system in
rear196
Tone on locking/unlocking31
Tools, refer to Onboard
toolkit247