2004 BMW Z4 2.5I engine

Driving
40 direction, the transmission shifts up. When
the lever is tapped in the – direction, the
transmission shifts down. M1 to M 5 appear
in the gear indicator.
The Adaptive Transmission Control ATC
executes upshifts or downshifts only when
the new gear will provide a suitable combi-
nation of engine and road speed, e.g. ATC
will not execute downshifts if the engine
speed is too high. The desired gear will
appear briefly in the instrument cluster, fol-
lowed by the actual gear.
If you are driving in the manual mode
and wish to accelerate rapidly, e.g. to
pass another vehicle, shift down manually
or with the kickdown function.<
Shifting from M/S to selector lever posi-
tions P, R and N is possible only by going
through position D.
Available indicators
P R N D SD M1 M2 M3 M4 M5
Malfunction
If the indicator lamp comes on,
there is a malfunction in the trans-
mission system.
All of the selector lever positions can con-
tinue to be engaged; in the forward drive
positions, however, the vehicle will be
operating in the fourth gear only.
If this happens, avoid extreme engine loads
and consult the nearest BMW center.
Never work in the engine compart-
ment when a drive gear – forward or
reverse – is engaged. If you do so, the vehi-
cle could move. information beginning on page 94.
Sequential manual gearbox
SMG*
The concept
The sequential manual gearbox SMG is an
automated manual gearbox with which
clutching and shifting is assumed by an
electro-hydraulic system.
The SMG is operated via two shift paddles
on the steering wheel and the selector lever
in the center console.
It offers the following functions:
>Sequential mode: manual mode
>Drive mode: automated mode
>Ability to choose between two different
driving programs: Standard, Sport,
refer to Dynamic Driving Control
>Operating safety through protection
against misshifting
>Automatic upshifts and downshifts in
the drive mode
>Automatic downshifts at minimum
engine rpm
>Kickdown function in the drive mode
>Acceleration assistant.
Selector lever positions
The current selector lever position is shown
by a light-emitting diode on the center con-
sole.
R: Reverse
N: Neutral

Reference
At a glance
Controls
Driving tips
Mobility
41
Forward position with one-touch functions:
Sequential mode
+:manual upshifting
—:manual downshifting
D: drive mode.
The SMG is ready for operation in ignition
key positions 2 and 3.
The gearbox is automatically taken
out of gear if the driver's door is
opened while the engine is running and the
driver does not actuate the pedals, the shift
paddles or the selector lever.
This is accompanied by an acoustic signal
and the flashing gear indicator.
The gear indicator in the instrument cluster
displays N.
A driving position can only be engaged
when the driver's door is closed.
When the vehicle is unlocked, a buzzing
sound in the area of the transmission indi-
cates that the system is ready to operate.<
Shiftlock
For your safety, it is only possible to
engage a driving position from selector
lever position N when the footbrake is
depressed.
Please keep in mind while driving
When driving off on inclines, drive
smoothly without pausing. Do not
keep the vehicle in place by depressing the
accelerator pedal; instead, apply the park-
ing brake. Otherwise, the SMG gearbox
could overheat.<
RReverse
Select reverse only when the vehicle is sta-
tionary.
NNeutral
Always engage before starting the engine,
refer to Starting the engine.
Sequential mode
Each time the engine is started, the
sequential mode is activated as soon as you move the selector lever into the for-
ward driving position.
The gears are shifted via the shift paddles
or the selector lever.
It is also possible to drive off in second
gear, e.g. on snow-covered roads.
D Drive mode
In the drive mode all forward gears are
shifted automatically.
To switch from sequential to drive mode:
tap the selector lever to the right toward D.
For rapid acceleration, e.g. during passing,
depress the accelerator pedal completely:
kickdown.
Kickdown:
In the kickdown mode, you achieve maxi-
mum acceleration.
Depress the accelerator pedal past the
increased resistance point at the full-throt-
tle position.
To switch back to sequential mode: tap the
selector lever again to the right toward D,
or change the current gear via the shift
paddles or the selector lever.
Shifting gears
With selector lever
>To upshift, tap the selector lever
toward +
>To downshift, tap the lever toward —.
With shift paddles on steering wheel
>To upshift, pull one of the shift paddles
>To downshift, push the paddle.

Driving
42 You accelerate from higher gears, e.g. dur-
ing passing, by downshifting manually.
In the following situations, the SMG in the
sequential mode assists you:
>The transmission will only execute
upshifts and downshifts that will result
in an appropriate combination of vehi-
cle speed and engine rpm. For
instance, downshifts that would result
in excessive engine speed cannot be
executed
>During a stop the gearbox is automati-
cally downshifted into first gear
>Shortly before a gear-dependent mini-
mum speed is reached, the gearbox
shifts down automatically without you
taking any action.
Display in the instrument cluster
Gear indicator
R N 1 2 3 4 5 6 D1 D2 D3 D4 D5 D6
The currently engaged gear, the selected
mode, and any possible malfunctions are
displayed in the instrument cluster.
Malfunctions
Indicator lamp
If the indicator lamp comes on,
there is a malfunction in the trans-
mission system.
All of the selector lever positions can con-
tinue to be engaged; however, in the for-
ward drive positions the range of available
gears is restricted.
If this happens, avoid extreme engine loads
and consult the nearest BMW center.
Warning tone
An acoustic signal sounds if the SMG gear-
box overheats; if possible you should either
stop or increase your pullaway speed so
that the system can cool down.
For jump-starting and towing, refer to the
information on page 94.
Driving Dynamic Control
The Driving Dynamic Control feature lets
you select between a standard and a sport
program.
Sport program
>The engine responds more spontane-
ously to any motion of the accelerator
pedal
>The vehicle is steered more directly and
traction is enhanced
Additionally with SMG and automatic
transmission:
>The shifting times are reduced
>The engine speed range is optimally uti-
lized in the drive mode.
Activating the Sport program
In ignition key position 2
Press the SPORT button.
The LED in the button lights up.
With automatic transmission:
The sport program of the automatic
transmission is enabled by activating the
Driving Dynamic Control system. Thus, the
selector lever does not have to be shifted
from D to M/S; refer also to page 39.<

Reference
At a glance
Controls
Driving tips
Mobility
45
Cruise control*
1To maintain and store speed/
to accelerate
2To decelerate
3To recall the stored setting
4To deactivate the system
Do not use cruise control on twisting
roads, when high traffic density pre-
vents driving at a constant speed, when the
road surface is slick, e.g. from snow, rain or
ice, nor when the road surface is loose, e.g.
from rocks or sand.<
To maintain and store speed/
to accelerate
You can maintain and store any desired
speed above approx. 20 mph / 30 km/h.
Press the lever briefly in direction 1:
The system maintains and stores the cur-
rent vehicle speed. Every time you tap the
lever, the speed increases by approx.
0.6 mph / 1 km/h.
Hold the lever in position 1:
The vehicle accelerates without pressure
on the accelerator pedal. As soon as you
release the lever, the system stores and
maintains the current speed.
If, on a downhill grade, the engine
braking effect is not sufficient, the
controlled speed can be exceeded. Speed
can drop on uphill grades if the engine out-
put is insufficient.<
To decelerate
Press the lever briefly in direction 2:
When the cruise control is active, vehicle speed is reduced by approx. 0.6 mph /
1 km/h every time you tap the button.
Hold the lever in position 2:
With the cruise control active, the system
automatically reduces the throttle opening
to slow the vehicle. As soon as you release
the lever, the system stores and maintains
the current speed.
To recall the stored setting
Press the lever briefly in direction 3:
The vehicle accelerates to and maintains
the last speed stored.
To deactivate the system
Press the lever briefly in direction 4:
The cruise control is deactivated immedi-
ately.
In addition, the system is automatically
deactivated in response to the following
conditions:
>When you apply the brakes
>When you depress the clutch or move
the automatic selector lever from D to N
>If you exceed or fall below the preset
speed for an extended period, for
example by depressing the accelerator.
You can recall the speed last stored.
Cruise control is also deactivated when the
ignition key is turned to position 0.
The stored speed is cleared in this case.

Everything under control
48
Everything under control
Odometer
1Odometer
2Trip odometer
Odometer
With the ignition key in position 0, you can
activate the displays shown in the illustra-
tion by pressing the button – see arrow – in
the instrument cluster.
Trip odometer
To set to zero
Ignition key position 1
Keep the button pressed until the trip
odometer counter is set to zero.
Tachometer
Never allow the engine to operate with the
needle in the red overspeed sector of the
gauge.
To protect the engine, the fuel supply is
interrupted when you approach this sector.
Fuel gauge
When indicator lamp 1 begins to stay on
continuously, there are still approx.
2.1 gallons / 8 liters of fuel in the fuel tank.
Tank capacity: approx. 14.5 gallons/
55 liters.
If the tilt of the vehicle varies, for example
when you are driving in mountainous areas,
the needle may fluctuate slightly.
Fill the fuel tank well before it is
empty. Driving to the last drop of fuel
can prevent the engine from operating
properly and result in damage.<
When you switch on the ignition, the indi-
cator lamp comes on briefly to indicate an
operational check.
Engine coolant temperature
gauge
Blue
The engine is still cold. Drive at moderate
engine and vehicle speeds.

Reference
At a glance
Controls
Driving tips
Mobility
49
Between the blue and red zones
Normal operating range. The needle may
rise as far as the edge of the red sector dur-
ing normal operation.
Red
When you switch on the ignition, warning
lamp 1 comes on briefly to indicate an
operational check.
Comes on while driving:
The engine has overheated. Stop and
switch the engine off immediately and
allow it to cool down.
For checking the coolant level, refer to
page 84.
Service interval display
Remaining distance to next service
The displays shown in the illustration
appear for a few seconds when the ignition
key is in position 1 or after the engine is
started.
The next service due appears with the
message OIL SERVICE or INSPECTION,
together with the distance remaining in
miles – in kilometers in Canada – before the
next scheduled service.
The computer bases its calculations of the
remaining distance on the preceding driv-
ing style.
A flashing message and a minus sign in
front of the number mean that the service
interval has already been exceeded by the
distance shown on the display. Please con-
tact your BMW center for an appointment.
Outside temperature
If the vehicle is not equipped with a com-
puter, the display in the instrument cluster
always shows the outside temperature.
Clock
If you wish to have a permanent time dis-
play, you can have it appear in the car radio
display, refer to the Owner's Manual for
Radio.
You can set the clock and the time display
in the car radio as follows.
To set
Ignition key in position 1 or higher:
Hours
1.Keep button 2 pressed for several sec-
onds until the hours are displayed and
the colon flashes
2.Press button 1 repeatedly until the
required hour is set
Minutes
3.Press button 2 to switch to the minutes
display

Reference
At a glance
Controls
Driving tips
Mobility
51
Average fuel consumption
If you continue to press the button on the
turn signal lever, the average fuel con-
sumption last displayed is recalculated
from that point in time.
Any time spent when the vehicle is station-
ary and the engine shut off is ignored in the
calculation.
Cruising range
The computer bases its calculations of the
cruising range on the preceding driving
style and on the remaining fuel in the tank.
It is important that you refuel when
the cruising range falls below approx.
30 miles/50 km. Otherwise, the engine
cannot be guaranteed to operate properly
and damage may result.<
Average speed
If you continue to press the button on the
turn signal lever, the average fuel con-
sumption last displayed is recalculated
from that point in time.

Technology for safety and driving convenience
52
Technology for safety and driving
convenience
Dynamic Stability Control
DSC
The concept
This system optimizes driving stability and
traction, especially when just starting off,
when accelerating or when cornering. It
also maintains vehicle stability, even in crit-
ical driving situations.
DSC recognizes unstable vehicle condi-
tions, such as understeering or oversteer-
ing, and, within physically feasible limits,
helps keeping the vehicle on a steady
course by reducing engine speed and by
brake applications at individual wheels.
The DSC is operational every time you start
the engine. It includes the following func-
tions:
>Automatic Stability Control plus Trac-
tion ASC+T
>Dynamic Traction Control DTC
>Dynamic Brake Control DBC
The laws of physics cannot be
repealed even with DSC. It will always
be the driver's responsibility to drive in a
manner that matches road conditions. We
therefore urge you to avoid using the addi-
tional safety margin of the system as an
excuse for taking risks.
Do not make any modifications to the DSC
system. Allow only authorized technicians
to perform service procedures on the
DSC.<
Indicator lamps
The indicator lamps in the instrument clus-
ter go out shortly after you switch on the
ignition.
Dynamic Stability Control DSC indi-
cator lamp flashes:
The system is active and governs
drive torque and braking forces.The indicator lamp stays lit:
Dynamic Stability Control DSC and
Dynamic Traction Control DTC have been
switched off via the button.
Dynamic Traction Control DTC indi-
cator lamp lights up permanently:
DTC has been deactivated via the
DSC button.
Dynamic Stability Control DSC indi-
cator lamp flashes:
Dynamic Traction Control DTC indi-
cator lamp lights up permanently:
DTC is actively regulating drive
torque and braking forces.
Interventions to increase stability are
being performed to a limited degree
only.<
The Dynamic Stability Control DSC
indicator lamp and yellow brake
warning lamp for Dynamic Brake
Control DBC light up continuously:
Dynamic Stability Control DSC,
Dynamic Traction Control DTC and
Dynamic Brake Control DBC are malfunc-
tioning.
Have the system repaired at your BMW
center.
Dynamic Stability Control DSC indi-
cator lamp and yellow brake warn-
ing lamp for Dynamic Brake Control
DBC for Canadian models:
The vehicle remains completely oper-
ational without the DSC, DTC and
DBC functions.<
In the event of a malfunction, please see
your BMW center.