brake rotor BMW 325CI CONVERTIBLE 2004 E46 Owner's Manual

124Special operating instructions
Break-in proceduresTo ensure that your vehicle continues to
provide maximum economy throughout
an extended service life, we request
that you devote careful attention to the
following instructions.Engine and differentialThe first 1,250 miles/2,000 km:
Constantly vary both vehicle and engine
speeds, remembering not to exceed
4,500 rpm or vehicle speeds of over
100 mph / 160 km/h:
Always obey all official speed limits.
Do not use full throttle, and avoid
pressing the accelerator beyond the
kickdown point during these initial
miles.
You can then proceed to increase
engine or vehicle speeds once the ini-
tial 1,250 miles/2,000 km have elapsed.
Please remember to observe the same
break-in procedures if either the engine
or the differential should have to be
replaced later in the course of the vehi-
cle's service life.
TiresOwing to technical factors associated
with their manufacture, tires do not
achieve their full traction potential until
an initial break-in period has elapsed.
We thus ask you to drive with extra care
during the first 200 miles/300 km.
Always obey all official speed limits.
When the vehicle is operated on
wet or slushy roads, a wedge of
water may form between the tire and
the road surface. This phenomenon is
referred to as hydroplaning, and can
lead to partial or complete loss of trac-
tion, vehicle control and braking effec-
tiveness. Reduce your speed on wet
roads.<Brake systemApprox. 300 miles/500 km must elapse
before the brake pads and rotors
achieve the optimal pad-surface and
wear patterns required for trouble-free
operation and an extended service life
later on.
To break in the separate parking brake
drums, apply the parking brake lightly
when coasting to a standstill – at a traf-
fic signal, for instance; use caution to
avoid posing a danger to other road
users.
You can prevent corrosion in the drums
by periodically repeating this proce-
dure.
The brake lamps do not come on
when the parking brake is set.
Vacuum for the brake system servo unit
on your BMW is available only when the
engine is running. When you move the
vehicle with the engine off – when tow-
ing, for example – substantially higher
levels of pedal force will be required to
brake the vehicle.<ClutchApprox. 300 miles/500 km must elapse
before the clutch starts to operate at
optimum efficiency. Remember to
engage the clutch carefully during this
initial period.

126
Brake systemBrake fluid levelIf the brake fluid level is too low and
brake pedal travel has become longer,
there may be a defect in one of the
brake system's hydraulic circuits.
Proceed to the nearest autho-
rized BMW center. It may be nec-
essary to apply higher levels of pres-
sure to the pedal when stopping and
braking distances may also be longer.
Please remember to adapt your driving
style accordingly.<Disc brakesLimited vehicle use, extended periods
with the vehicle parked or in storage,
and operating conditions in which brak-
ing is restricted to gentle, low-pressure
applications will all increase the ten-
dency for corrosion to form on the
rotors; this is often accompanied by a
simultaneous accumulation of contami-
nation on the brake pads. The pads
must exert a certain minimal level of
pressure against the rotors for the disc
brakes' inherent self-cleaning effect to
remain effective.
If the brake rotors are corroded, they
will tend to respond to braking with a
pulsating effect that even extended
brake applications will fail to cure.
When driving in heavy rain and on wet
roads it is useful to apply light pressure
to the brake pedal every few miles.
Monitor traffic conditions to ensure that
this maneuver does not pose a hazard
to you or to other road users. The heat
generated in this process helps dry the
pads and rotors to ensure that your
brake system will respond with undi-
minished efficiency when you need it.
When descending steep hills and
extended grades, downshift to a gear
that will allow you to continue safely
with only a minimal amount of braking.
By minimizing the loads placed on the
brake system, this strategy helps
ensure that optimal brake system
response will remain available at all
times. Use care to avoid exceeding the
approved engine-speed range, refer to
page 86.Do not coast with the clutch
depressed or with the transmis-
sion or selector lever in Neutral. Do not
coast with the engine shut off. The
engine provides no braking effect when
the clutch is depressed and there is no
power-assist for braking or steering
when the engine is not running.
Never allow floor mats, carpets or any
other objects to protrude into the area
around the accelerator, clutch and
brake pedals and obstruct their move-
ment.<
Brake pads
For your own safety: use only
brake pads that BMW has
released for your particular vehicle
model. BMW cannot evaluate non-
approved brake pads to determine if
they are suitable for use, and therefore
cannot ensure the operating safety of
the vehicle if they are installed.<
Portable phone in the vehicleBMW recommends using mobile com-
munications devices, e.g. portable
phones, inside the vehicle with a suit-
able outside antenna. Otherwise, it can-
not be ruled out that the vehicle elec-
tronics and portable phone may
interfere with each other.

Everything from A to Z
173
Battery 157
charge 157
disposal 157
indicator lamp 18
jump-starting 159
remote control 30, 31
Battery charge current 18
Belts, refer to Safety
belts 56
Beverage holders 115
Blower
air conditioning 104
automatic climate
control 108
BMW High Performance
Synthetic Oils 139
BMW Maintenance
System 142
BMW sports seat 53
Bore, refer to Engine
data 166
Bottle holders, see Bever-
age holders 115
Brake fluid 141
indicator lamp 18, 141
level 141
Brake force display 96
Brake hydraulic system 126
Brake lamps
bulb replacement 151
indicator lamp, defective
lamp 88Brake lights
brake force display 96
Brake pads 126
brake fluid level
18, 126, 141
breaking in 124
disc brakes 126
indicator lamp 19
Brake rotors
brake system 126
breaking in 124
Brake wear warning
indicator lamp 19
Brakes
ABS 125
brake fluid 141
breaking in 124
indicator/warning lamp
18, 19
parking brake 73
Break-in procedures 124
Bulb replacement, refer to
Lamps and bulbs 149
Bulb, replacing 149
Buttons in steering wheel 22
C
California Proposition
65 warning 143
Can holders, see Beverage
holders 115
Capacities 169Car battery 157
Car care, refer to the Caring
for your vehicle brochure
Car keys, refer to Keys 30
Car radio, refer to the
Owner's Manual for Radio
Car telephone
preparation 115
Car telephone, refer to the
separate Owner's Manual
Car vacuum cleaner, con-
necting 116
Car wash, refer to the Caring
for your vehicle brochure
Carpet care, refer to the
Caring for your vehicle
brochure
Cassette operation, refer to
the Owner's Manual for
Radio/Onboard Computer
CBC Cornering Brake Con-
trol 125
warning lamp 19
CD changer, refer to the
Owner's Manual for
Radio/Onboard Computer
CD operation, refer to the
Owner's Manual for
Radio/Onboard Computer
Cellular phone 115
Center armrest
front 114Center high-mount brake
lamp
bulb replacement 152
Central locking system 30
button 34
passenger
compartment 34
Changing a wheel 153
Charge indicator lamp 18
Check Control 88
Check Gas Cap
indicator lamp 19
Child seats, refer to Child-
restraint systems 64
Child-restraint mounting
system (LATCH) 66
Child-restraint system 64
Chock 154
Cigarette lighter 115
Cigarette lighter socket 116
Cleaning chrome parts, refer
to the Caring for your vehi-
cle brochure
Cleaning light alloy wheels,
refer to the Caring for your
vehicle brochure
Cleaning position, convert-
ible top 45, 50
Cleaning the vehicle, refer to
the Caring for your vehicle
brochure
Cleaning windshield 84
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