engine BMW 323i SEDAN 2000 E46 User Guide

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IndexDataTechnologyRepairsCar careControlsOverview
Electronic vehicle immobilizer The key to securityYour BMW is equipped with a passive
anti-theft system. This electronic immo-
bilization system is designed to reduce
the susceptibility of the vehicle to theft
by making it impossible to start the
engine using any means other than the
special keys furnished with the vehicle.
Your BMW center can cancel the elec-
tronic system authorization for individual
keys (in the event of loss, for instance). A
deactivated key can no longer be used
to start the engine.463de042
How the electronics workAt the heart of this system is an elec-
tronic chip that is integrated into the
key. The lock mechanism itself is actu-
ally a dual-function device, simulta-
neously serving as a communications
interface designed to allow the security
system to maintain a continuous stream
of variable, vehicle-specific signals with
the electronic circuitry in the key. The
system will not release the ignition, fuel
injection and starter unless it recog-
nizes an "authorized" key.
Force applied to the key can dam-
age the integrated electronic cir-
cuitry. A damaged key can no longer be
used to start the engine.<

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0 Steering lock engaged The key can only be inserted or re-
moved in this position.
After removing the key, turn the steer-
ing wheel slightly to the left or right until
the lock engages.
If the key is not removed, an acoustic
signal is sounded after the driver's door
has been opened.
Vehicles with automatic transmis-
sion:
Do not move the selector lever from the
"Park" position until the engine is run-
ning (ignition key at position 2).
In order to turn the key back to position
0 or to remove it, move the selector
lever into position "Park" first (Inter-
lock).<460de022
1 Steering lock disengaged Turning the steering wheel slightly to
the right or left often makes it easier to
turn the key from 0 to 1.
Individual electrical devices are ready
for operation.2 Ignition onAll electrical equipment and accesso-
ries are available for use.3 Starting the engine
Vehicles with manual transmis-
sion: Depress the clutch when
starting the vehicle. A lockout prevents
the engine from starting if the clutch is
not depressed.c
Before starting>Engage the parking brake.
>Be sure that the shift lever is in "Neu-
tral" (or "Park" if the vehicle is equipped
with an automatic transmission).
>Manual transmission: Depress the
clutch pedal.
>Automatic transmission: Depress the
footbrake.
Do not run the engine in enclosed
areas. The exhaust gases contain
carbon monoxide, an odorless and col-
orless, but highly toxic gas. Breathing
the exhaust gases poses an extreme
health risk, and can lead to uncon-
sciousness and death.
Do not leave the car unattended with
the engine running. An unattended vehi-
cle with a running engine represents a
potential safety hazard.<
>Start the engine. Do not press the
accelerator pedal.
Do not actuate the starter for too
short a time, but not turn it for more
than approx. 20 seconds. Release the
ignition key immediately when the
engine starts.
Do not allow the engine to warm up by
leaving it running while the vehicle remains
stationary. Instead, begin driving immedi-
ately at a moderate engine speed.<
Steering/Ignition lock Starting the engine

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Starting the engine Switching off the engine If the engine does not start on the first
attempt (if it is very hot or cold, for in-
stance):
>Press the accelerator pedal halfway
down while engaging the starter.
Cold start at extremely low tempera-
tures, from approx. + 5 7 (Ð 15 6)
and at elevations above 3,300 feet
(1,000 meters):
>On the first start attempt, engage the
starter for a longer period (approx.
10 seconds)
>Press the accelerator pedal halfway
down while engaging the starter.Turn the ignition key to position 1 or 0.
Do not remove the ignition key
while the vehicle is still moving.
If you did so, the steering lock would
engage when the steering wheel is
turned.
When you leave the vehicle, always re-
move the ignition key and engage the
steering lock.
Vehicles with manual transmission:
Always engage the parking brake when
parking on slopes and inclined sur-
faces. Placing the lever in 1st gear or
reverse may not provide adequate
resistance to rolling.
Vehicles with automatic transmission:
Place the selector lever in "Park."<

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Automatic transmission with Steptronic
*
You have the option of driving with a
normal automatic transmission or
switching to manual.
When you move the selector lever from
the "D" position to the left into the M/S
range, the performance-oriented shift
programs of the automatic transmission
are engaged. As soon as you briefly
touch the selector lever in the "+" or "Ð"
direction, Steptronic changes the gear.
The manual mode is engaged. When-
ever you want to use automatic again,
just shift the selector lever toward the
right to position D.
The automatic transmission with Step-
tronic is equipped with ATC (Adaptive
Transmission Control). ATC reacts with
precision to your individual driving style
and the current driving conditions. It is
for this reason that various shift pro-
grams are used.
For additional details concerning the
ATC, please refer to the chapter de-
scribing "Advanced technology" on
page 162.
Selector lever positions
P R N D M/S + Ð
Starting the engineThe engine can only be started in selec-
tor lever positions P ("Park") or N ("Neu-
tral").Range selectionA detent prevents inadvertent shifts into
certain selector lever positions. To dis-
engage the detent, press the button on
the front of the shift knob (arrow).460de076
While the vehicle is stationary and
before shifting out of "Park" or
"Neutral," depress the footbrake in
order to disengage the selector lever's
lock mechanism (Shiftlock).
Hold the footbrake down until starting
off. Otherwise the vehicle will "creep"
when a drive position is engaged.<
If you leave the vehicle with the
engine running, move the selector
lever to the "Park" or "Neutral" position
and apply the parking brake. If you fail
to do this, the vehicle could move. Do
not leave the car unattended with the
engine running. An unattended vehicle
with a running engine represents a po-
tential safety hazard.<
P ParkSelect only when the vehicle is station-
ary. The transmission locks to prevent
the rear wheels from turning.R ReverseSelect only when the vehicle is station-
ary.N NeutralSelect only if your journey is interrupted
for a long period.

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Automatic transmission with Steptronic
*
In the following situations, the Step-
tronic "thinks" for you in the manual
mode:
>In order to prevent the engine from
overrevving, the transmission shifts
automatically to the next higher gear
just before the RPM cutoff point.
>If you do not do anything to inter-
vene, it will automatically downshift
at lower speeds.
>In kickdown, it will downshift into
the lowest gear possible, depending
on the engine speed.
>According to the situation, for in-
stance in wintry conditions, the
vehicle can be started in 2nd or
3rd gear.
Available displays
P R N D SD M1 M2 M3 M4 M5460de138
Electronic transmission control
module
If the indicator lamp comes on,
there is a malfunction in the
transmission system.
Bring the vehicle to a stop, select trans-
mission position "P," set the parking
brake and turn the engine off (ignition
key to position 0).
Wait a few seconds, then start the
engine.
If the indicator lamp goes out after a
few seconds, normal transmission per-
formance has been restored. You may
continue to drive as usual.
If the indicator lamp does not go out,
you can place the selector lever in all
positions. However, the vehicle will now
only operate in 3rd and 4th gear.
If this happens, avoid extreme engine
loads and consult the nearest BMW
center.
Do not work in the engine com-
partment when a drive gear (for-
ward or reverse) is engaged. If you do
this, the vehicle could move.<
For towing, tow-starting or jump-start-
ing the vehicle, refer to the information
beginning on page 157.

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IndexDataTechnologyRepairsCar careControlsOverview
Cruise control
*
You can store and automatically main-
tain any desired vehicle speed above
approx. 20 mph (30 km/h). To activate the system In ignition key positions 1 or 2:
Press button 1. The indicator lamp in
the instrument cluster comes on. You
can now use the cruise control.462de214
To store and maintain speed or
to accelerate Press button 3 briefly:
The system registers and maintains the
current vehicle speed. The speed will
now be increased by approx. 0.6 mph
(approx. 1 km/h) every time you briefly
press the button.
Press and hold button 3:
The vehicle accelerates without pres-
sure on the accelerator pedal. When
you release the button, the system reg-
isters and maintains the current speed.
If, on a downhill gradient, the
engine braking effect is not suffi-
cient, the controlled speed may be
exceeded. Speed may drop on uphill
grades if the engine output is insuffi-
cient.<
To deceleratePress button 2 briefly:
When the cruise control is active, vehi-
cle speed is reduced by approx.
0.6 mph (approx. 1 km/h) every time
you briefly press the button.
Press and hold button 2:
With the cruise control active, the sys-
tem automatically reduces the throttle
opening to slow the vehicle. When you
release the button, the system registers
and maintains the current speed.

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1 Odometer You can activate the displays shown in
the illustration with the ignition key in
position 0 by pressing the button in the
instrument cluster (arrow).2 Trip odometerTo reset the trip odometer to zero,
press the button (arrow) with the
ignition key in position 1 or 2.460us144
Avoid engine speeds in the red warning
zone of the gauge.
To protect the engine, the fuel supply is
automatically interrupted in this zone;
you will notice a loss of power.460us079
Indicates the current fuel consumption
in mpg (in l/100 km for Canadian mod-
els). You can check your current driving
style to see whether it is conducive to
economy and minimum exhaust emis-
sions.
The needle goes back to zero when the
car is not moving.460us080
Odometer Tachometer Energy Control

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Fuel gauge Temperature gauge Service Interval Display When you switch on the ignition, the in-
dicator lamp comes on briefly to con-
firm that the system is stationary.
Once the indicator lamp begins to light
up continuously, there are still approx.
2.1 gallons (8 liters) of fuel in the fuel
tank.
Tank capacity: page 175.
If the tilt of the vehicle varies (extended
driving in mountainous areas, for exam-
ple), there may be slight fluctuations of
the needle.
Fill the fuel tank well before it is
empty. Driving to the last drop of
fuel can result in damage to the engine
and/or the catalytic converter.<460us081
BlueThe engine is still cold. Drive at moder-
ate engine and vehicle speeds.RedWhen you switch on the ignition, the
indicator lamp comes on briefly to con-
firm that the system is operational.
If the lamp comes on while operating
the vehicle: The engine is overheated.
Stop and switch the engine off immedi-
ately and allow it to cool down.Between the blue and red zonesNormal operating range. It is not un-
usual for the needle to rise as far as the
edge of the red zone in response to
high outside temperatures or severe
operating conditions.
Checking coolant level: page 128.460de082
Remaining distance for serviceThe displays shown in the illustration
appear for a few seconds when the
ignition key is in positions 1 and 2 or
after the engine is started.
The next service due appears with the
message OILSERVICE or INSPECTION,
together with the remaining distance
before scheduled service.
The computer bases its calculations of
the remaining distance on the rate of
fuel consumption in the period immedi-
ately preceding your data request.
A flashing message and a "Ð" in front of
the number mean that the service inter-
val has already been exceeded by the
distance shown on the display. Please
contact your BMW center for an
appointment.460de112

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Onboard computer
*
Average fuel consumption If you continue to hold the button on the
turn signal lever, the average fuel con-
sumption last displayed is recalculated
from that point.460us296
Range The computer bases its calculations of
the cruising range on the rate of fuel
consumption in the period immediately
preceding your data request.460us148
Average speed If you continue to hold the button on the
turn signal lever, the average fuel con-
sumption last displayed for that speed
is recalculated from that point in time.
Any time spent when the vehicle is
stationary and the engine is shut off is
ignored for the calculation.460us149

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Dynamic Stability Control (DSC) The conceptDSC maintains vehicle stability, even in
critical driving situations.
The system optimizes vehicle stability
during acceleration and when starting
from a full stop, as well as optimizing
traction. In addition, the system recog-
nizes unstable vehicle conditions (un-
dersteering or oversteering, for example)
and holds the vehicle on a sure course
by intervening via the engine and by
braking intervention at the individual
wheels.
The system activates automatically each
time you start the engine.462us284
Indicator lamp
The indicator lamp in the instru-
ment cluster goes out shortly
after you switch on the ignition.
Refer to pages 21 and 22.
Indicator lamp flashes:
The system is actively regulating drive
torque in response to monitored vehicle
operating conditions.
If the indicator lamp fails to go out after
the engine is started, or comes on dur-
ing the course of normal vehicle opera-
tion:
If the system was not switched off,
there is a system malfunction. The vehi-
cle remains operational, but without
DSC. Please consult your BMW center
for repairs.
To deactivate the systemPress the button. The indicator lamp
flashes.
The illustration depicts the arrangement
of the buttons if the vehicle is fully
equipped. This may vary, depending on
the equipment actually installed.
When the DSC is deactivated, you are
operating the vehicle in the conven-
tional drive mode.
In exceptional instances, it is effective
to deactivate the system:
>when rocking the vehicle or starting
off in deep snow or on loose surfaces
>or when driving with snow chains.
Refer also to page 110.To reactivate the systemPress the button again; the indicator
lamp goes out.
The laws of physics cannot be re-
pealed, even with DSC. Any con-
sequences arising from traction loss
due to excessive vehicle speed remain
the responsibility of the driver. For this
reason, do not take risks by using the
additional safety margin provided by
the system as an excuse.<
For additional details concerning DSC,
please refer to the chapter describing
"Advanced technology" on page 163.