2009 BMW Z4 SDRIVE35I brake rotor

Things to remember when driving
110
Things to remember when driving
Break-in period
Moving parts need breaking-in time to adjust to
each other. Please follow the instructions below
in order to achieve the optimal service life and
economy of operation for your vehicle.
Engine and differential
Always obey all official speed limits.
Up to 1,200 miles/2,000 km
Drive at varying engine and road speeds, but do
not exceed an engine speed of 4,500 rpm or a
road speed of 100 mph/160 km/h.
Do not drive with full-throttle operation, and do
not use the transmission 's kick-down mode or
Launch Control.
After driving 1,200 miles/2,000 km
Engine and vehicle speeds can be gradually
increased.
Tires
Due to technical factors associated with their
manufacture, tires do no t achieve their full trac-
tion potential until afte r an initial break-in
period. Therefore, drive cautiously during the
first 200 miles/300 km.
Brake system
Brakes require an initial break-in period of
approx. 300 miles/500 km to achieve optimized
contact and wear patterns between brake pads
and rotors. Drive cautiously during this break-in
period.
Clutch
The function of the clut ch reaches its optimal
level only after a distan ce driven of approx.
300 miles/500 km. During this break-in period,
engage the clutch gently.
Following part replacement
The same break-in procedures should be
observed if any of the components mentioned
above have to be renewe d in the course of the
vehicle's operating life.
Saving fuel
The fuel consumption of your vehicle depends
on several factors. You can lower fuel consump-
tion and the environmental impact by taking
certain measures, adjusting your driving style
and having the vehicle serviced regularly.
Remove any unneeded cargo
Additional weight incr eases fuel consumption.
Remove any mounted parts after you
have finished using them
Remove additional mirrors and the luggage rack
when they are no longer in use. Mounted parts
affect the vehicle's aerodynamics and increase
fuel consumption.
Close both windows
An open glass roof or window causes higher air
resistance and thus increases fuel con-
sumption.
Check tire inflation pressure regularly
Check the tire inflation pr essure at least twice a
month and before embarking on a long journey,
and correct it if necessary.
Low tire inflation pressure causes higher rolling
resistance and thus increases fuel consumption
and tire wear.
Set off immediately
Do not let the engine wa rm up while the car is
still standing, but set off immediately at moder-
ate engine speed. This is the fastest way for the
cold engine to reach its operating temperature.

Things to remember when driving
112
The risk of hydroplaning
increases with declin-
ing tread depth on the tire s, refer also to Mini-
mum tread depth on page 194.
Driving through water
Drive though calm water only if it is not
deeper than 1 ft/25 cm and at this height
no faster than walking speed, up to 6 mph/
10 km/h. Otherwise, the vehicle's engine, the
electrical systems and the transmission may be
damaged. <
Use the parking brake on inclines
On inclines, do not hold the vehicle for a
lengthy period using the clutch; use the
parking brake instead. Ot herwise greater clutch
wear will result. <
For more information about the drive-off assis-
tant, refer to page 80.
Braking safely
Your BMW is equipped with ABS as a standard
feature. Applying the brakes fully is the most
effective way of braking in situations in which
this is necessary. Since the vehicle maintains
steering responsiveness, you can still avoid
possible obstacles with a minimum of steering
effort.
Pulsation of the brake pedal, combined with
sounds from the hydraulic circuits, indicate that
ABS is in its active mode.
Driving in wet conditions
When roads are wet or there is heavy rain,
briefly exert gentle pre ssure on 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. Full
braking efficiency will th en be available when
you need it.
Hills
To prevent overheating and the resulting
reduced efficiency of the brake system,
drive long or steep downhill gradients in the
gear in which the least br aking is required. Even light but consistent brak
e pressure can lead to
high temperatures, brake wear and possibly
even brake failure. <
You can increase the engine's braking effect by
shifting down, all the way to first gear if neces-
sary. This strategy helps you avoid placing
excessive loads on the brake system. Down-
shifting in manual mode of the automatic trans-
mission, refer to page 54.
7-gear sport automatic transmission with
dual clutch: Never drive with the trans-
mission in neutral or with the engine switched
off; otherwise, engine braking action will not be
present or there will be no power assistance to
the brakes or steering.
Manual transmission: Never drive with the
clutch held down, with the transmission in neu-
tral or with the engine switched off; otherwise,
engine braking action will not be present or
there will be no power a ssistance to the brakes
or steering.
Never allow floor mats, carpets or any other
objects to protrude into the area around the
pedals, otherwise peda l function could be
impaired. <
Corrosion on brake rotors
When the vehicle is driv en only occasionally,
during extended periods when the vehicle is not
used at all, and in op erating conditions where
brake applications are less frequent, there is an
increased tendency for corrosion to form on
rotors, while contaminan ts 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 re spond with a pulsating
effect that even extended application will fail
to cure.
When the vehicle is parked
Condensation forms wh ile the automatic cli-
mate control is in operation, and then exits
under the vehicle. Traces of condensed water
under the vehicle are therefore normal.

Reference 231
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Automatic Service Request 184
Automatic transmission with Steptronic 53
– interlock 53,54
– overriding selector lever lock 55
– shiftlock, refer to Changing
selector lever position 54
– sport program 54
– towing 215
– tow-starting 215
AUTO program for automatic
climate control 96
AUX-IN
– port 102
AUX-IN port 158
Average fuel consumption 66
– setting the units 68
Average speed 66
Avoiding unintentional alarms 34
Axle loads, refer to Weights 222
B
Backrest contour, refer to
Lumbar support 43
Backrests, refer to Seat adjustment 42
Backrest width adjustment 43
Backup lamps
– replacing bulb 210
Backup lamps, refer to Tail lamps 210
Band-aids, refer to First-aid
pouch 214
Bar, refer to Towing methods 216
Base plate for telephone or mobile phone
– refer to Snap-in adapter 174
– refer to Snap-in adapter in the center armrest storage
compartment 102
Bass, tone setting 138Battery
212
– charging 212
– disposal 36,212
– jump starting 214
– remote control 28
– temporary power failure 212
Battery for mobile phone 175
Battery renewal
– remote control 36
– remote control for vehicle 36
Being towed 216
Belts, refer to Safety belts 44
Belt tensioner, refer to Safety
belts 44
Beverage holders, refer to Cup holders 103
Blower, refer to Air flow rate 93,96
Bluetooth, activating/
deactivating 166
Bluetooth, refer to separate Owner's Manual
BMW
– car shampoo 207
BMW Assist, activating 180
BMW Assist 178
BMW center 184
BMW Homepage 4
BMW Maintenance System 202
BMW Search 180
BMW webpage 4
Bottle holders, refer to Cup holders 103
Brake
– parking brake 52
Brake assist, refer to Dynamic
Brake Control DBC 78
Brake fluid, refer to Service requirements 69
Brake lamps
– replacing bulb 210
Br
ake pads 110
– breaking in 110
Brake rotors 112
– brakes 110
– breaking in 110 Brakes
– ABS
78
– BMW Maintenance System 202
– breaking in 110
– service requirements 69
Brakes, refer to Braking safely 112
Brake system 110
– BMW Maintenance System 202
– breaking in 110
– disc brakes 112
Breakdown services, refer to Roadside Assistance 213
Breaking in the clutch 110
Breaking in the differential, refer to Engine and
differential 110
Break-in period 110
Brightness of Control Display 76
Bulb changing, refer to Lamps and bulbs 208
Button for starting the engine,
refer to Start/stop button 50
Buttons on the steering wheel 11
Buttons on the steering wheel 11
C
California Proposition 65
warning 6
Call
– accepting 167
– ending 168
– rejecting 168
Calling, refer to Phone
numbers, dialing 168
Can holders, refer to Cup holders 103
Capacities 222
Capacity of the cargo bay 222
Car battery, refer to Vehicle
battery 212
Car care, refer to Care 204