2004 BMW 525I SEDAN ABS

Driving tips
107Reference
At a glance
Controls
Communications
Navigation
Entertainment
Mobility
The risk of hydroplaning increases as the
tread depth of the tires decreases, refer
also to Tire tread on page 173.
Water on the road
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 vehicle's engine, the electri-
cal systems and the transmission may be
damaged.<
Brakes
Your BMW is equipped with ABS as stan-
dard. The best way to achieve optimized
response from the ABS is to apply maxi-
mum pressure to the brake pedal during
emergency: panic stops. Since the vehicle
maintains steering responsiveness, you
can nevertheless avoid possible obstacles
with a minimum of steering effort.
Pulsation at the brake pedal combines with
sounds from the hydraulic circuits to indi-
cate to the driver that ABS is in its active
mode.
Do not drive with your foot resting on
the brake pedal. Even light but con-
sistent pedal pressure can lead to high
temperatures, brake wear and possibly
even brake failure.<
Driving in wet conditions
While driving in wet conditions and in
heavy rain, it is a good idea to apply light
pressure to the brake pedal every 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
You can retain full and unimpaired braking
efficiency by downshifting to a gear in
which only minimal brake applications are
needed when descending long or steep
downhill stretches. You can further enhance the engine's brak-
ing 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
pages 50 and 55. 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 Ð or with the engine
switched off Ð 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.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
accelerator and brake pedals and obstruct
their movement.<
Corrosion on the brake rotors
When the vehicle is driven only occasion-
ally, during extended periods when the
vehicle is not used at all, and in operating
conditions where brake applications are
less frequent, there is an increased ten-
dency for corrosion to form on rotors, while
contaminants accumulate on the brake
pads. This occurs because the minimum
pressure which must be exerted by the
pads during brake applications to clean the
rotors is not reached.
Should corrosion form on the brake rotors,
the brakes will tend to respond with a pul-
sating effect that even extended applica-
tion will fail to cure.
Brake pads
The brake pad wear warning lamp
lights up and a message appears on
the Check Control. Please note any
supplementary information that appears
there.
Warning lamp for Canadian models.
The brake pads have reached their mini-
mum pad thickness. Have them replaced at
your BMW center as soon as possible.

Wheels and tires
174 even when only small amounts of water are
present on the road surface.
As winter tires display a noticeable loss in
their ability to cope with cold-weather driv-
ing conditions once the tread wears to
below 0.16 in/4 mm, to ensure continued
safety you should always have such tires
replaced.
Wear indicators at the tread-groove base,
refer to arrow, are distributed over the tire's
circumference and are marked on the side
of the tire with TWI Ð Tread Wear Indicator.
These indicators signal at a tread depth of
0.063 in/1.6 mm that the legal wear limit
has been reached.
Tire damage
Unusual vibrations encountered dur-
ing normal vehicle operation can indi-
cate tire failure or some other vehicle
defect. This can, for example, be caused by
driving over curbs. These kinds of prob-
lems may also be signaled by other
changes in vehicle response, such as a
strong tendency to pull to the left or right.
Should this occur, respond by immediately
reducing your speed. Carefully proceed Ð
or have your vehicle towed Ð to the nearest
BMW center or tire dealer to have the
wheels or tires inspected. Tire damage,
extending to sudden and complete loss of
pressure in extreme cases, can pose a
potentially lethal safety hazard for the vehi-
cle's occupants and other road users
alike.<
Replacing wheels/tires
Unprofessional attempts by laymen to
service tires can lead to damage and
accidents. Have this work performed by
skilled professionals only. The technicians
at your BMW center will be glad to assist
you with the required professional knowl-
edge and specialized equipment.<
The correct combination of wheels and
tires is another vital factor in ensuring reli-
able operation of various vehicle systems
such as ABS and DSC.
Have the wheel and tire assemblies bal-
anced every time either a wheel or a tire is
replaced.
BMW does not recommend the use of
retreaded tires, as otherwise driving
safety may be reduced. Possible variations
in the design and the age Ð which could be
substantial Ð of the carcasses can lead to
unusually rapid wear.<
The right wheels and tires
BMW recommends that you use only
wheel and tire combinations that
BMW has tested and approved for your
particular vehicle. Variations in factors such
as manufacturing tolerances mean that
even wheels and tires with identical official
size ratings could actually have different
dimensions than the approved units Ð these
differences could lead to body contact, and
with it the risk of severe accidents. If non-
approved wheels and tires are used, BMW
cannot evaluate their suitability, and there-
fore cannot be held liable for driving
safety.<
To maintain good handling and vehicle
response, use only tires of a single tread
configuration from a single manufacturer.
After a flat tire, always remember to have
the specified wheel and tire combination
remounted on the vehicle as soon as pos-
sible.
Recommended tire brands
BMW tests certain tire brands for each tire
size, classifies them as road-safe and

Under the hood
180
Checking coolant level
Correct coolant level with the engine cold,
approx. +687/206:
1.Turn the cap of the expansion tank
counterclockwise to allow any accumu-
lated pressure to escape, then continue
turning to open
2.The coolant level is correct when the
coolant extends to between the MIN
and MAX marks on the filler neck, refer
to the diagram adjacent to the filler
neck
3.If the coolant is low, slowly add coolant
up to the specified level Ð do not overfill.
Brake fluid
The symbol lights up and a mes-
sage appears on the Control Dis-
play: the brake-fluid level in the
container is too low.
The brake fluid reservoir is located under
the microfilter housing trim panel on the
driver's side of the vehicle. To have brake
fluid added to the system, or to have the
source of any brake fluid loss traced and
rectified, please contact your BMW center,
which can also supply the factory-
approved Ð DOT 4 Ð brake fluids.
Brake fluid is hygroscopic: it absorbs
moisture from the atmosphere over
the course of time.
To ensure that the brake system continues
to provide safe and reliable performance,
remember to have the brake fluid changed
every 2 years at the latest, refer to page 66
and to the Service and Warranty Informa-
tion Booklet for US models or the Warranty and Service Guide Booklet for Canadian
models.
Brake fluid is toxic and also damages vehi-
cle paintwork. Always store these agents in
tightly-closed original containers kept well
away from the reach of children.
Do not spill the fluid and do not refill the
brake fluid reservoir to beyond the MAX
mark. Should it come into contact with hot
engine components, the brake fluid could
ignite and cause personal injury in the form
of burns.<
Always observe all applicable rules
and regulations for environmental
protection when disposing of used brake
fluid.<
Warning lamp for Canadian models.
Brake hydraulic systems
A low brake-fluid level combined with
longer-than-usual pedal travel could be a
sign that one of the brake system's hydrau-
lic circuits has failed.
Proceed to the nearest BMW center.
Remember that pedal travel may be
increased, and there may also be a sub-
stantial increase in the amount of pedal
pressure required to brake the vehicle.
Please adapt your driving style accord-
ingly.<

Everything from A to Z
202
Everything from A to Z
Index
A
ABS Antilock Brake
System 77
Ð indicator lamp 77
Acceleration assistant 54
Accessories, refer to Your
individual vehicle 5
"Activation time" for
independent
ventilation 95
Active cruise control 59
Ð malfunctions 64
Active head restraints,
front 40
Active roll stabilization 80
Active seat 42
Active seat ventilation 42
Active steering 82
Adaptive Head Light 88
"Address book" for
navigation 120
Address for navigation
Ð deleting 120
Ð entering 116
Ð selecting 120
"Add to address book" for
navigation 120
"Add to destination
list" 118
Adjusting temperature for
upper body 93
Adjusting the thigh
support 37
"After door is opened" 39
"After unlocking" 39
Airbags 83
Ð indicator lamp 84
Ð sitting safely 36
Air circulation, refer to
Recirculated air 91
Air distribution
Ð automatic 91
Ð individual 93Air flow, refer to Air
volume 91
Airing, refer to
Ventilation 94
"Air recirculation on /
off" 44
Air vent outlets of
automatic climate
control 90
Air volume 91
AKI, refer to Fuel
specifications 169
Alarm system 32
Ð avoiding unintentional
alarms 33
All around the steering
wheel 10
"All channels" 138
"All doors" 28
All-season tires, refer to
Winter tires 175
"AM", wave-
band 130, 134
Antenna for portable
phone 150
Antifreeze
Ð coolant 179
Ð washer fluid 57
Anti-theft system 27
Anti-trapping mechanism
Ð glass roof 35
Ð windows 34
Approved axle loads, refer
to Weights 200
Approved gross vehicle
weight, refer to
Weights 200
Arrival time, refer to
Computer 71
Ashtray
Ð front 99
Ð rear 100
Assistance window 18Assisting systems, refer to
DSC Dynamic Stability
Control 78
AUC Automatic
recirculated-air
control 91
"Audio" 131
Audio 130
Ð adjusting the tone 131
Ð controls 130
Ð switching on/off 130
Ð volume 131
Audio systems, refer to
Tone control 131
Automatic
Ð air distribution 91
Ð air volume 91
Ð cruise control 58, 59
Ð storing stations 135
Automatic car wash, refer
to Caring for your vehicle
brochure
Automatic climate
control 90
Ð automatic air
distribution 91
Ð settings using the Control
Center 92
Ð switching off 92
Automatic curb monitor 39
Automatic headlamp
control 87
"Automatic programs" 93
Automatic recirculated-air
control AUC 91
Automatic steering wheel
Ð adjustment 43

Reference 203
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Automatic transmission
with Steptronic 54
Ð indicator lamp 56
Ð interlock 49
Ð selector lever interlock 55
Ð shiftlock 55
Ð sport program 55
Ð starting the engine 50
Ð towing 193
AUTO program, refer to
Automatic air distribution
and volume 91
"Autostore" on the
radio 136
"AUTO" with automatic
climate control 93
Average fuel
consumption 70
Ð setting the units 74
Average speed 70
"Avoid ferries" for
navigation 121
"Avoid freeways / tolls" for
navigation 121
Avoiding unintentional
alarms 33
"Avoid tollroads" for
navigation 121
Axle loads, refer to
Weights 200
"A - Z" 154
B
Backrests, refer to
Seats 36
Backrest width
adjustment 37
Backup lamps, refer to
Reverse gear 51
Ð replacing the bulbs 186
"Balance", audio
system 132
Balance, refer to Tone
control 131
"Bass", audio system 132
Bass, refer to Tone
control 131
Battery 188
Ð in the remote control 26
Ð jump-starting 192Belts, refer to Safety
belts 36, 40
Beverage holders 99
Black ice, refer to Ice
warning 65
Blocking sections of a route
for navigation 125
Blower, refer to Air
volume 91
BMW Assist 161
Ð enabling 161
Ð services offered 162
"BMW Info" 163
BMW Maintenance
System 181
"BMW Service
settings" 161
Bore, refer to Engine
data 198
Bottle holder, refer to
Beverage holders 99
Brake Assistant, refer to
DBC Dynamic Braking
Control 79
Brake fluid 180
Ð indicator lamp 180
Ð level 180
Ð replacing 180
Brake force display 82
Brake hydraulic
systems 180
Brake lamps, replacing the
bulbs 186
Brake pads 107
Ð breaking-in
procedure 106
Brake pedal, refer to
Brakes 107
Brake rotors 107
Brakes 107
Ð ABS 77
Ð brake fluid 180
Ð breaking-in
procedure 106
Ð handbrake 50Brake system 106
Ð brake-fluid level 180
Ð brake pads 107
Ð breaking-in
procedure 106
Ð disc brakes 107
Ð indicator lamp 13, 107
Breakdown services, refer
to Roadside
Assistance 191
Break-in procedures 106
Ð brakes 106
Ð clutch 106
Ð differential 106
Ð engine 106
Brightness on the Control
Display 73
Bulbs and lamps
Ð replacing the bulbs 184
Buttons on steering
wheel 11
C
California Proposition
65 Warning 183
"Call" 154
Call
Ð accepting 153
Ð display accepted 154
Ð ending 154
Ð in absence 154
Ð starting 153
Calling
Ð from phone book 154
Ð from the Top 8 list 154
Ð redialing 154
Calling up traffic
information 126
"Call sender" 156
"Call Sirius" 138
Can holder, refer to
Beverage holders 99
Capacities 201
Car battery, refer to
Battery 188
Car care, refer to Caring for
your vehicle brochure
Car-care products, refer to
Caring for your vehicle
brochure

Everything from A to Z
212 Restraint systems, refer to
Safety belts 40
Reverse, fast
Ð CD changer 146
Ð CD player 142
Reverse gear
Ð automatic transmission
with Steptronic 55
Ð manual transmission 51
Ð Sequential manual
transmission SMG 52
Right/left balance
adjustment in audio
mode 132
"Roadside Assistance" 162
Roadside Assistance 191
"Roaming" 165
Roller sun blinds 97
Roof-mounted luggage
rack 109
Route 123
Ð changing 121
Ð display 123
Ð list 124
Ð map cancellation 123
Ð map display 124
Ð new 125
Ð selecting 121
Ð selecting criteria 121
Route announcements,
refer to Voice
instructions 124
Route guidance, refer to
Destination guidance 123
"Route list" for
navigation 124
Route map 123
Route selection 121
Run-flat tires 175
Ð continuing driving with a
damaged tire 175
Ð flat tire 81
Ð tire inflation pressure 175
Ð tire replacement 174
S
Safety belts 36, 40
Ð damage 41
Ð sitting safely 36
Ð warning lamp 40Safety belt tensioners, refer
to Safety belts 36, 40
Safety feature
Ð glass roof, electrical 35
Ð windows 34
Safety lock buttons 30
Safety systems 78
Ð ABS Antilock Brake
System 77
Ð airbags 83
Ð safety belts 40
Satellite radio 138
Ð activating 138
Ð selecting channel 138
Ð storing channel 138
"SAT" for radio 138
Scan
Ð CD changer 145
Ð CD player 142
Ð radio 136
"Scan", playing
stations 135
"Scan", playing
tracks 142, 145
Screen, refer to Control
Display 16
"Screen on / off" 44
"Seat heater
distribution" 41
Seats 36
Ð adjusting comfort seat 37
Ð adjusting sports seat 37
Ð adjusting the seats 37
Ð heating 41
Ð memory, refer to Seat,
mirror and steering wheel
memory 38
Ð sitting safely 36
Ð storing the setting 38
Ð ventilation, refer to Active
seat ventilation 42
Securing cargo, refer to
Cargo 109
Securing the load 102
"Select as destination" 119
Select "BMW Service" 162
"Select current speed" 73
Selecting a new route for
navigation system 125
Selecting audio
sources 130Selecting new scale for
navigation system
display 124
Selecting route 121
Selecting "Route
preference" 121
Selection options with
navigation system 121
Selector lever
Ð automatic transmission
with Steptronic 55
Ð Sequential manual
transmission SMG 52
Selector lever lock, refer to
Changing selector-lever
positions 55
Selector-lever positions
Ð automatic transmission
with Steptronic 55
Ð manual transmission 51
Ð SMG Sequential manual
transmission 52
Sequential manual
transmission SMG 51
"Service" 66, 162
Service, refer to Roadside
Assistance 191
Service Interval
Display 66
"Service notification" 162
"Service Request" 163
"Service
requirements" 66, 162
"Service Status" 162
"Set date" 75
"Set service date" 67
Setting road-speed limit 72
Settings
Ð changing on the Control
Display 73
Ð configuring, refer to Key
Memory 26
Setting the time, refer to
Preselecting switch-on
times 95
Shifting gears with
automatic transmission
with Steptronic 55
Shiftlock, refer to Changing
selector-lever
positions 55