2008 BMW 550I width

At a glance
15Reference
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
1Microphone for hands-free mode for
telephone
*
and for voice command system*23
2Reading lamps113
3SOS: initiating
an emergency request247
4Interior lamps112
5Glass sunroof
*, electric41
Panorama glass sunroof43
6Passenger airbag status lamp101
7Control Display16
Displays for menu navigation
8Hazard warning flashers
9Central locking system32
10Automatic climate control114
11Changing
>radio station168
>track168
12Ejecting
>navigation DVD
*142
>audio CD168
13Programmable memory/direct selection
buttons2114Drive for navigation DVDs
*142
15Drive for audio CDs168
16Switching Entertainment sound output
on/off and adjusting volume168
18Controller16
Turn, press or move horizontally in four
directions
19Opening start menu on Control Display17 Temperature setting,
left/right115
Automatic air distribution and
volume115
Cooling function117
AUC Automatic recirculated-air
control117
Recirculated-air mode117
Maximum cooling117
Air volume116
Defrosting windows and removing
condensation116
Rear window defroster114
17
Heated seats*51
Active seat ventilation
*52
Adjusting active backrest
width
*47
Active seat
*52
PDC Park Distance Control
*90
DTC Dynamic Traction Control92
Opening luggage compartment lid/
tailgate
*33,35

Adjusting
46
Seats
Note before adjusting
Never attempt to adjust your seat while
the vehicle is moving. The seat could
respond with unexpected movement, and the
ensuing loss of vehicle control could lead to an
accident.
Also on the passenger side, do not incline the
backrest too far to the rear while the vehicle is
being driven, otherwise there is a danger in the
event of an accident of sliding under the safety
belt, eliminating the protection normally pro-
vided by the belt.<
Please follow the instructions on damage to
safety belts provided on page51 and the infor-
mation on the active front head restraints
on
page49.
Adjusting seat
To ensure that the safety systems con-
tinue to provide optimized protection,
please observe the adjustment instructions on
page45.<
1Longitudinal direction
2Height
3Angle4Backrest
Adjusting comfort seat*
In this seat, you can also adjust:
1Backrest width
2Shoulder support
3Thigh support
4Lumbar support
*
Shoulder support
the adjustable upper backrest also supports the
back in the shoulder region. This provides a
relaxed driving position and helps relieve stress
on the shoulder muscles.

Controls
47Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Lumbar support*
You can also adjust the contour of the backrest
to obtain additional support in the lumbar
region.
The upper hips and spinal column receive sup-
plementary support to help you maintain a
relaxed, upright sitting position.
>Increase or decrease curvature: press front
or rear section of switch.
>Shift curvature up or down: press upper or
lowers section of switch.
Adjusting active backrest width*
First set a comfortable backrest width, see
above. Based on the backrest width set, the lat-
eral support is automatically adapted to the cur-
rent driving situation.
The adaptation of the backrest width and the
speed of the adjustment vary depending on the
program. You can select from among three pro-
grams from comfort to sport.
Button with three LEDs
Press button once per program:
>"Comfort": one LED
>"Normal": two LEDs
>"Sport": three LEDsTo deactivate: press button longer.
Button with one LED
Press the button repeatedly until the desired
program is shown on the Control Display.
The LED in the button lights up.
To deactivate: press button longer.
Easy entry/exit*
To facilitate entry and exit, the backrest width
temporarily opens all the way.
Seat, mirror and steering
wheel memory*
You can store and request two different posi-
tions for the driver's seat and passenger seat
*,
exterior rearview mirrors, and steering wheel.

Controls
53Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Mirrors
Exterior mirrors
The mirror on the passenger's side is
more curved than the driver's mirror.
Objects reflected in the mirror are closer than
they appear. Do not estimate the distance of
following traffic based on what you see in the
mirrors, otherwise there is an increased acci-
dent risk.<
1Adjusting
2Switching to the other mirror or to the
automatic curb monitor
3Folding mirrors in and out
*
Storing the mirror positions, refer to Seat, mir-
ror and steering wheel memory on page47.
Adjusting manually
You can also adjust the mirrors manually by
pressing against the outer edges of their mirror
glass.
Folding mirrors in and out*
Pressing button3 allows you to fold mirrors
in and out up to a speed of approx. 20 mph/
30 km/h. This is advantageous, for example, in
car washes, narrow streets or for bringing mir-
r o rs t h a t h a v e b e e n m a n u a l ly f o l d e d in b a c k i n t o
the correct position. Mirrors that were folded in
are folded out automatically at a speed of
approx. 25 mph/40 km/h.
Before going through a car wash, fold the
mirrors in manually, or with button 3, oth-
erwise they could be damaged, depending on
the width of the car wash system.<
Automatic heating
Below a certain outdoor temperature, both
exterior mirrors are heated whenever the
engine is running or the ignition is switched on.
Tilting down passenger-side exterior
mirror – automatic curb monitor*
Activating
1.Slide switch into the driver's side mirror
position, arrow 1.
2.Shift into reverse or move selector lever into
position R.
The mirror glass tilts downward somewhat
on the passenger's side. This allows the
driver to see the area immediately adjacent
to the vehicle – such as a curb – when park-
ing, etc.
Deactivating
Slide switch into the passenger side mirror
position, arrow 2.
Interior rearview mirror
To reduce the dazzle effect of following vehi-
cles at night, turn the knob.

Transporting children safely
56
Transporting children safely
The right place for children
Do not leave children unattended in the
vehicle, otherwise they could endanger
themselves and other persons, e.g. by opening
the doors.<
Children always in the rear
Accident research shows that the safest place
for children is on the rear seat.
Children younger than 13 years of age or
with a height under 5 ft/150 cm may only
be transported in the rear in child restraint sys-
tems which correspond to the age, weight and
height of the child. Otherwise there is an
increased danger of injury in an accident.<
Children 13 years of age or older must wear a
safety belt as soon as a suitable child restraint
system can no longer be used due to their age,
size and weight.
Exception for front passenger seat
Should it ever be necessary to use a child
restraint system on the front passenger
seat, the front and side airbags on the passen-
ger side must first be deactivated. Otherwise,
there is an increased risk of injury for the child if
the airbags are triggered, even with a child
restraint system.<
For more information on automatic deactivation
of the front passenger airbags, refer to
page101.
Installing child restraint
systems
Observe the child restraint system manu-
facturer's instructions for selection,
installation and use of the child restraint sys-
tems. Otherwise the degree of protection may
be reduced.<
Backrest width* on front passenger
seat
Open the backrest width setting of the
front passenger seat all the way. After
mounting the child's seat, deactivate the active
backrest width adjustment and do not call up
any memory position. Otherwise this limits the
stability of the child's seat on the front passen-
ger seat.<
1.After unlocking the vehicle, sit on the front
passenger seat and close the door to call up
the memory position.
2.Completely open the backrest width adjust-
ment, refer to page46.
3.Deactivate active backrest width adjust-
ment, refer to page47.
4.Install child's seat.
Child seat security
All rear safety belts and the safety belt for the
front passenger can be locked against pulling
out to secure child restraint systems.

Driving tips
137Reference
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Mobility
Before driving into a car wash
Fold in the exterior mirrors, refer to page53,
otherwise they could be damaged due to the
width of the vehicle.
General information on the care and mainte-
nance of your BMW is contained in the Caring
for your vehicle brochure.
528xi, 535xi
Avoid car washes with guide rail heights
over 4 in/10 cm, otherwise there is danger
of damaging chassis components.<
Rear window wiper*
The rear window wiper can be damaged in car
washes. Take appropriate protective measures;
ask the car wash operator if necessary.
Automatic and sport automatic
transmission
Follow the instructions on page62 so that the
vehicle can roll.
Cargo loading
To avoid loading the tires beyond their
approved carrying capacity, never over-
load the vehicle. Overloading can lead to over-
heating and increases the rate at which damage
develops inside the tires. The ultimate result
can assume the form of a sudden blow-out.<
Make sure that no fluids leak in the cargo
bay; otherwise the vehicle could be dam-
aged.<
Determining loading limit
1.Locate the following statement on your
vehicle's placard
*:
The combined weight of occupants
and cargo should never exceed
XXX lbs. or YYY kg, as otherwise the vehicle
may be damaged and unstable driving con-
ditions may result.<
2.Determine the combined weight of the
driver and passengers that will be riding in
your vehicle.
3.Subtract the combined weight of the driver
and passengers from XXX lbs. or YYY kg.
4.The resulting figure equals the available
amount of cargo and luggage load capacity.
For example, if the XXX amount equals
1,400 lbs. and there will be five 150-lb. pas-
sengers in your vehicle, the amount of avail-
able cargo and luggage load capacity is
650 lbs.:
1,400 lbs. minus 750 lbs. = 650 lbs.
5.Determine the combined weight of luggage
and cargo being loaded on the vehicle. That
weight may not safely exceed the available
cargo and luggage load capacity calculated
in step 4.
6.If your vehicle will be towing a trailer, part of
the load from your trailer will be transferred
to your vehicle. Consult the manual for
transporting a trailer to determine how this
may reduce the available cargo and luggage
load capacity of your vehicle.

Mobility
225Reference
At a glance
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550i
Tire identification marks
Knowledge of the labeling on the side of the tire
makes it easier to identify and choose the right
tires.
Tire sizeSpeed letter
Q= up to 100 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
Tire Identification Number
Tires with DOT codes meet the guidelines
of the U.S. Department of Transportation.
DOT code:
Tire sizePressure specifications in psi/kPa
Compact wheel
*:
T 135/80 R 17 102 M61/420
Traveling speeds
up to max. of
100 mph/160 km/hTraveling speeds
including those exceeding
100 mph/160 km/h
All pressure specifications
in the table are indicated in
psi/kilopascal with cold tires.
Cold = ambient temperature
245/40 R 18 93 Y 32/220 38/260 32/220 35/240 33/230 41/280
245/45 R 17 95 W
245/45 R 17 99 V M+S XL
225/50 R 17 94 H M+S
225/50 R 17 94 W32/220 38/260 32/220 38/260 38/260 45/310
245/40 R 18 97 V M+S XL 33/230 39/270 33/230 39/270 39/270 46/320
Front: 245/40 R 18 93 Y
Rear: 275/35R1895Y32/220 35/240 32/220 32/220 33/230 38/260
Front: 245/35 R 19 93 Y XL
Rear: 275/30R1996YXL35/240 39/270 33/230 38/260 38/260 45/310
More details on the permissible load and weights can be found on page257.
e.g.
Nominal width in mm
Aspect ratio in Ξ
Belted construction – radial
Rim diameter in inches
Carrying capacity ID-code
(not in ZR tires)
Speed code letter
(in ZR tires before the R)225/50 R1794 W
e.g.
Manufacturer code
for tire make
Tire size and tire design
Tire ageDOT xxxx xxx 3307

Wheels and tires
226
Tire age
The manufacturing date of tires is contained in
the tire coding: DOT ... 3307 indicates that the
tire was manufactured in week 33 of 2007.
BMW recommends that you replace all tires
after 6 years at most, even if some tires may last
for 10 years.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width. For example:
Tread wear 200 Traction AA
Temperature A
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. For example, a tire graded
150 would wear one and one-half (1γ) times as
well on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, how-
ever, and may depart significantly from the
norm due to variations in driving habits, service
practices and differences in road characteris-
tics and climate.
Traction
The traction grades, from highest to lowest, are
AA, A, B, and C.
These grades represent the tire's ability to stop
on wet pavement, as measured under con-
trolled conditions on specified government test
surfaces of asphalt and concrete. A tire marked
C may have poor traction performance.The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction charac-
teristics.<
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,
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 page227.
M+S
Winter and all-season tires.
These have better winter properties than sum-
mer tires.
XL
Indicates specially reinforced tires.