engine BMW M3 CONVERTIBLE 2001 E46 User Guide

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IndexDataTechnologyRepairsCar careControlsOverview
Electronic vehicle immobilizer Central locking systemThe key to security Your 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 indi-
vidual keys (in the event of loss, for
instance). A deactivated key can no
longer be used to start the engine.
How the electronics work At 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
damage the integrated electronic
circuitry. A damaged key can no longer
be used to start the engine.<
The conceptThe following can be unlocked or
locked simultaneously with the central
locking system:
>Doors
>Luggage compartment lid
>Fuel filler door
>Glove compartment.
The central locking system is ready for
operation whenever the driver's door is
closed.
The central locking system can be
operated
>from outside via the door lock and
using the remote control
>from inside by pressing a button.
If it is operated from inside, the fuel
filler door will not be locked (refer to
page 38).
If it is operated from outside, the anti-
theft protection is activated at the same
time. This prevents the doors from
being unlocked via the locking buttons
or the door handles. The alarm system
is also activated or deactivated.

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Convertible topKeep children away from the travel path
of the convertible top while it is in
motion.<
To close the electric power
windows while driving, always be
sure to first close either the rear
windows, or all 4 windows at the same
time, otherwise, at high speed, the
windows may not close tightly.<
At higher speeds, the ensuing
vacuum in the passenger
compartment can cause the convertible
top to begin fluttering. Increase the air
supply via the ventilation controls so
that a vacuum does not occur in the
vehicle.<
1 Closing
2 OpeningOpening and closingWith ignition key in position 1 or 2 and
the vehicle stationary.
To avoid discharging the battery, when
possible you should start the engine
before opening or closing the top.
1 Observe the preceding safety
precautions.
2 Before opening the convertible top,
make sure that the base of the
convertible top compartment in the
luggage compartment is folded
down. Refer to page 41.
3 Make sure the luggage compartment
lid is closed.
4 Press and hold the corresponding
button for convertible top operation.
The red indicator lamp will light up
while the convertible top is in motion.
It goes out as soon as the opening or
closing operation is completed.
If the red indicator lamp flashes when
you release the button, this indicates
that the top has not completely
finished opening or closing. You can
press the corresponding button to
resume the process in the desired
direction.
If the yellow indicator lamp remains
on while you are pressing the button,
this indicates that the convertible top
compartment's lower panel has been
folded up and the top cannot be
moved, refer to step 2.
The automatic sequence will be
interrupted immediately if you
release the button that operates the
top. The sequence can be continued in
the desired direction by pressing this
button.<

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0 Steering locked
1 Steering unlocked
2 Ignition switched on
3 Starting the engine
Steering locked The key can be inserted and removed in
this position only.
To lock the steering column after you
have taken the key out, turn the
steering wheel until you hear it lock.Steering unlocked Individual electrical accessories are
ready for operation.
You will find that it is often easier to turn
the ignition key from position 0 to posi-
tion 1 when you move the steering
wheel slightly to help disengage the
lock. Ignition switched onAll electrical equipment and accesso-
ries are available for use. 1 Engage the parking brake
2 Move the shift lever to the neutral
position
3 Depress the clutch pedal
4 Turn the key to position 3 to start the
engine.
Do not actuate the starter for too short
a time, but not turn it for more than
approx. 20 seconds. Release the igni-
tion key immediately when the engine
starts.
Do not allow the engine to warm up by
leaving it running while the vehicle
remains stationary. Instead, drive off
immediately at a moderate engine
speed.
Do not run the engine in enclosed
areas. The exhaust gases contain
carbon monoxide, an odorless and
colorless, but highly toxic gas.
Breathing the exhaust gases poses an
extreme health risk, and can lead to
unconsciousness and death.
Do not leave the vehicle unattended
with the engine running. An unat-
tended vehicle with a running engine
represents a potential safety hazard.<
Steering/Ignition lock Starting the engine

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IndexDataTechnologyRepairsCar careControlsOverview
Starting the engine Switching off the engine Parking brake If the engine does not start on the first
attempt (if it is very hot or cold, for
instance):
>Press the accelerator pedal halfway
down while engaging the starter.
Cold starts at very low temperatures,
starting at approx. 5 7 (–15 6) and at
high altitudes (over 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.
Engine idle speed is controlled by the
engine computer system. Increased
speeds at startup are normal and
should decrease as the engine warms
up. If engine speed does not decrease,
service is required.
To prevent the battery from
discharging, always deactivate elec-
trical devices that are not in use. Switch
the ignition off when the vehicle is not
being driven.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
remove the ignition key and engage the
steering lock.
Set the parking brake when parking on
steep hills, because under certain
conditions, putting the vehicle into first
or reverse gear may not be enough to
prevent it from rolling away.
The power assist is not available when
the engine is not on. This means that
more effort is required for braking.<
The parking brake is designed primarily
to prevent the vehicle from rolling when
it is parked. It operates against the rear
wheels. To engageThe lever engages automatically, the
indicator lamp in the instrument cluster
comes on when the ignition key is in
position 2. Refer to page 21.To releasePull up slightly on the lever, press the
button (arrow) and lower the lever.
If, in exceptional circumstances,
it should be necessary to engage
the parking brake while the vehicle is
in motion, do not pull the lever with

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IndexDataTechnologyRepairsCar careControlsOverview
Washer/Wiper system Rear window defroster Cruise control Do not use the washers when the reser-
voir is empty, since this could cause
damage to the washer pump.<Clean the headlamps
*
When the vehicle's lighting system is
switched on, the headlamps will also be
cleaned every fifth time the automatic
windshield washer is activated.Windshield washer jetsThe windshield washer jets are warmed
automatically when the ignition key is in
position 2.
To activateWith the convertible top closed or the
hardtop
* mounted, press the
button: as
long as the indicator lamp remains on,
the rear window defroster continues at
high output (rapid thaw).
After the indicator lamp goes out, the
defroster continues operating at
reduced power for a limited period
before deactivating automatically.
To deactivatePress the button if the indicator lamp is
on.
Starting at about 20 mph (30 km/h), you
can maintain and store any vehicle
speed that you specify.
You can use cruise control, whenever
the system is active while the engine is
running.
1 Accelerate and store
2 Decelerate and store
3 Activate/interrupt/deactivate the
system
4 Recall the stored speed

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Cruise control To activate the system From ignition key position 2.
Press button 3 and the indicator lamp
on the instrument cluster (refer to
page 23) will come on. You can now
use the cruise control.
Do not use cruise control on
twisting roads, when high traffic
density prevents driving at a constant
speed, when the road surface is slick
(snow, rain, ice), or when the road
surface is loose (rocks, sand).< To deactivate the system Press button 3 as often as you need to
until the indicator lamp on the instru-
ment cluster goes out.
Cruise control is also deactivated when
the ignition key is in position 0.
The speed stored in memory is deleted.
To store and maintain speed or to
acceleratePress button 1 briefly: the system regis-
ters and maintains the current vehicle
speed. Every time you tap the button,
the speed increases by approx.
0.6 mph (1 km/h).
Press and hold button 1: the vehicle
accelerates without pressure on the
accelerator pedal. When you release
the button, the system registers 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 can drop on uphill
grades if the engine output is insuffi-
cient.< To deceleratePress button 2 briefly: if you are already
driving with active cruise control, the
speed is decreased by approx. 0.6 mph
(1 km/h) every time you tap the button.
Press and hold button 2: with the cruise
control active, the system automatically
reduces the throttle opening to slow the
vehicle. When you release the button,
the system registers and maintains the
current speed.
To interrupt the cruise control When the cruise control is on, press
button 3. The indicator lamp will stay
on.
You can use the cruise control again
whenever you want by calling up the
speed that was stored last.
In addition, cruise control is interrupted
automatically
>if the brakes are applied
>when you depress the clutch pedal,
>if you exceed or fall below the
programmed speed for an extended
period (by depressing the acceler-
ator, for example).Recall the stored speed.Press button 4: the vehicle accelerates
to and maintains the last speed stored.

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IndexDataTechnologyRepairsCar careControlsOverview
1 Odometer
2 Trip odometerOdometerYou can activate the displays shown in
the illustration with the ignition key in
position 0 by pressing the button
(arrow) in the instrument cluster.Trip odometerTo reset the trip odometer to zero,
press the button (arrow) with the igni-
tion key in position 1 and up.
Variable pre-warning zoneThe orange pre-warning zone displays
current permissible engine speeds,
depending on the engine temperature.
As the engine temperature climbs, the
sectors for this pre-warning zone will
go out one after the other.
Avoid engine speeds in the pre-warning
zone if possible.Warning zone
Always avoid engine speeds in the
red warning zone, as otherwise
the engine may be damaged.<
To protect the engine, the fuel supply is
automatically interrupted in this zone;
you will notice a loss of power.
The general operating temperature is
between 175 7 (80 6) and 250 7
(120 6). During performance-oriented
driving, do not exceed the maximum
temperature of 300 7 (150 6).
Odometer Tachometer Engine oil temperature

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Fuel gauge Coolant temperature gauge Once the indicator lamp stays on
continuously, there are still approx.
2 gallons (8 liters) of fuel in the fuel
tank.
For fuel tank capacity, refer to
page 181.
If the tilt of the vehicle varies (extended
driving in mountainous areas, for
example), there may be slight fluctua-
tions 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.<
When the ignition is switched on, the
indicator lamp in the fuel display will
light up briefly to confirm that the
system is operational.
BlueThe engine is still cold. Drive at
moderate engine and vehicle speeds. RedTo confirm that the system is opera-
tional, the warning lamp in the coolant
temperature gauge will light up briefly
when the ignition is switched on.
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.
Checking coolant level, refer to
page 129.
Between the blue and red zonesNormal operating range. It is not
unusual for the needle to rise as far as
the edge of the red zone in response to
high outside temperatures or severe
operating conditions.

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IndexDataTechnologyRepairsCar careControlsOverview
Service Interval Display Remaining distance for serviceThe 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 OILSERVICE or INSPECTION,
together with the distance remaining
before the next scheduled service.
The computer bases its calculations of
the remaining distance on the previous
driving style.
A flashing message and a "–" in front of
the number mean that the service
interval has already been exceeded by
the distance shown on the display.
Please contact your BMW center for an
appointment.

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Computer Average fuel consumption If you continue to hold the button on the
turn signal lever, the average fuel
consumption last displayed is recalcu-
lated from that point in time.
Cruising range The computer bases its calculations
of the cruising range on the previous
driving style.
Average speed If you continue to hold the button on the
turn signal lever, the average speed last
displayed 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.