2006 BMW 323I SEDAN engine

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Starting the engine
Do not run the engine in closed rooms,
otherwise the inhaling of toxic exhaust
gases can cause unconsciousness and death.
The exhaust gases contain carbon monoxide,
an odorless and colorless, but highly toxic gas.
Never leave an unattended vehicle with the
engine running, otherwise such a vehicle repre-
sents a potential safety hazard.
Before leaving the car with the engine running,
place the transmission in idle or move the
selector lever to position P and apply the hand-
brake to prevent the car from moving.<
When starting the engine, do not press the
accelerator pedal.
Do not allow the engine to warm up by leaving it
running while the vehicle remains stationary.
Instead, begin to drive immediately at a moder-
ate engine speed.
Do not depress either the brake or the
clutch until you are ready to start the
engine. The engine is started immediately
when you briefly touch the start/stop button
and depress the brake if the car has automatic
transmission, or the clutch if the car has manual
transmission.<
Manual transmission
1.Apply the handbrake.
2.Depress the clutch and shift to idle position.
3.Briefly press the start/stop button.
The starter operates automatically for a certain
time, and stops automatically as soon as the
engine has started.
Automatic transmission
1.Depress the brake.
2.Move the selector lever to position P.
3.Briefly press the start/stop button.
The starter operates automatically for a certain
time, and stops automatically as soon as the
engine has started.
Sequential manual gearbox SMG*
1.Depress the brake.
2.Engage selector lever position N and make
sure that this position is displayed in the
instrument cluster.
3.Start the engine.
The starter operates automatically for a certain
time, and stops automatically as soon as the
engine has started.
If the engine does not start, depress the
brake and push the selector lever to the
right, then engage position N. Observe the dis-
play in the instrument cluster while doing so.<
Special starting conditions
In the following situations, press the accelerator
pedal halfway down when starting the engine:
>If the engine does not start on the first
attempt, for instance when it is extremely
hot or cold.
>If the engine is started at very low tempera-
tures, below approx. + 57/–156, at high
altitudes above approx. 3,300 ft/1,000 m.
Avoid frequent starting in quick succes-
sion or repeated start attempts in which
the engine does not start. Otherwise, the fuel is
not burned or inadequately burned and there is
a danger of overheating and damaging the cat-
alytic converter.<
Switching off the engine
Always take the remote control with you
when you leave the vehicle.
When parking on a downhill incline, apply the

Driving
54 handbrake, otherwise the vehicle could roll
away.<
Manual transmission
1.Apply the handbrake.
2.With the car at a standstill, briefly press the
start/stop button.
3.Shift into first gear or reverse.
Automatic transmission
1.With the car at a standstill, move the selec-
tor lever to position P.
2.Briefly press the start/stop button.
3.Apply the handbrake.
Sequential manual gearbox SMG
1.Apply the handbrake.
2.Engage a drive position.
3.Briefly press the start/stop button.
If the engine is switched off while N is engaged,
this will be signaled visually and acoustically.
Handbrake
The handbrake is primarily intended to prevent
the vehicle from rolling while parked; it brakes
the rear wheels.
Indicator lamp
The indicator lamp is lit, and when you
drive off an acoustic signal sounds in
addition. The handbrake is still applied.
Indicator lamp for Canadian models.
Applying
The lever locks in position automatically.
Releasing
Pull slightly upwards, press the button and
lower the lever.
In exceptional cases, if the handbrake has
to be used to slow or stop the car, do not
pull the lever up too hard. In doing so, continu-
ously press the button of the handbrake lever.
Otherwise, too violent an application of the
handbrake can overbrake the rear axle and
cause the rear of the car to swerve.<
To prevent corrosion and one-sided brak-
ing action, occasionally apply the hand-
brake lightly when the vehicle is slowly coming
to a stop if the traffic conditions are suitable.
The brake lamps do not light up when the hand-
brake is applied.<
Manual transmission
When shifting into 5th or 6th gear, press
the gearshift lever to the right. Otherwise
the engine could be damaged if you inadvert-
ently shift into 3rd or 4th gear.<

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Reverse gear
Select only when the vehicle is stationary.
When the gearshift lever is pressed to the left, a
slight resistance has to be overcome.
Sequential manual gearbox
SMG*
The concept
The sequential manual gearbox SMG is an
automated transmission in which operation of
the clutch and gearshifts are performed by an
electro-hydraulic system.
SMG is operated via the selector lever in the
center console and two shift paddles on the
steering wheel.
It offers you the following functions:
>Choice of manual or automatic operation:
sequential mode or Drive mode
>Choice of two driving programs: Normal or
Sport, refer to Dynamic Driving Control,
page56
>Automatic downshifting and prevention of
misshifting in sequential mode as well
>Acceleration assistant, refer to page57
Selector lever positions
The current selector lever position can be seen
on the center console.
>R: Reverse gear
>N: Neutral, idle
>One-touch functions for sequential mode:
+: manual upshifting
–: manual downshifting>D: Drive mode or sequential mode
N is automatically selected when the
driver's door is opened while the engine is
running, as long as the pedals, shift paddles and
selector lever are not operated.
This is indicated by an acoustic signal and a
flashing N in the instrument cluster.<
Gear indicator
R N 1 to 6
The gear currently engaged is displayed, pre-
ceded by a D in Drive mode.
This indicator is the only way you can
confirm whether or not the desired selec-
tor lever position is engaged.<
Shiftlock
Before moving the lever away from N with the
vehicle stationary, first depress the brake; oth-
erwise the desired gearshift will not be carried
out.
R Reverse
Select only when the vehicle is stationary.
Gear-change mode
The gears can be changed in two different
ways.
>Sequential mode
Gears are shifted by means of the shift pad-
dles or the selector lever.
>D Drive mode
All forward gears are shifted automatically.
You can switch from one mode to the other by
pressing the selector lever towards the right in
the direction of D.

Driving
56
Sequential mode
After every engine start, sequential mode is
activated when you press the selector lever
towards the right while the brake is depressed.
You can shift up or down using the shift paddles
or the selector lever. You do not need to lift your
foot from the accelerator pedal while doing so.
It is also possible to start off in second gear, e.g.
on slippery surfaces.
SMG assists you in the following situations:
>Upshifts and downshifts are executed only
when they will result in a plausible combina-
tion of engine and vehicle speed; for exam-
ple, a downshift that would cause the
engine to overrev cannot be executed by
the system.
>The system shifts down into first gear auto-
matically when the vehicle comes to a stop.
>The system shifts down automatically just
before the engine speed falls below the
minimum speed required for a certain gear;
the driver does not need to intervene.
Shifting gears via selector lever
>Pull the selector lever backwards to shift up.
>Push it forward to shift down.
Shifting gears via the shift paddles on
the steering wheel
>Pull one of the shift paddles to shift up.
>Press it to shift down.
D Drive mode
In Drive mode, all forward gears are shifted
automatically.To switch from sequential mode to Drive mode:
press the selector lever towards the right in the
direction of D.
Kick-down: to accelerate rapidly, e.g. when
passing another vehicle, depress the accelera-
tor pedal all the way. You will achieve maximum
acceleration.
To switch back to sequential mode: press the
selector lever again towards the right in the
direction of D or shift gears via the shift paddles
or the selector lever.
On uphill slopes, drive off without delay.
Do not hold the vehicle in place by
depressing the accelerator pedal; engage the
handbrake instead. Otherwise, the transmis-
sion could overheat.<
Dynamic Driving Control
Dynamic Driving Control enables you to drive
your BMW in an even more performance-ori-
ented manner at the touch of a button:
>Gears are shifted more quickly.
>In Drive mode, the engine speed range is
utilized optimally.
Activating the system
Press the SPORT button while the ignition is
switched on. The LED in the button lights up.
Deactivating the system
>Press the SPORT button again or
>engage reverse gear or
>switch off the engine.
The LED in the button goes out.

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Acceleration assistant
The acceleration assistant provides for optimal,
racing-style acceleration when starting off on a
non-slippery surface.
Do not use the acceleration assistant too
frequently, otherwise components could
wear prematurely.<
1.Activate Dynamic Driving Control.
2.Deactivate DSC, refer to page85.
3.Quickly depress the accelerator pedal all
the way: kick-down. The optimal engine
speed for pulling away is achieved.
To maintain driving stability, reactivate
DSC afterward.<
Automatic transmission with
Steptronic*
In addition to fully automatic operation, you can
also manually shift with the Steptronic, refer to
page58.
Vehicle parking
To prevent the vehicle from rolling,
always select position P and apply the
handbrake before leaving the vehicle with the
engine running.<
Disengaging the remote control
In order to remove the remote control from the
ignition lock, you must first move the selector
lever to position P and switch off the engine:
interlock.
Selector lever positions
P R N D M/S + –
Displays in the instrument cluster
P R N D DS M1 to M6
The selector lever position is displayed, or the
current gear in the manual mode.
Changing selector lever positions
>With the ignition switched on or the engine
running, the selector lever can be moved
out of position P: interlock.
>Before moving the lever away from P or N
with the vehicle stationary, first depress the
brake; otherwise the selector lever will
refuse to move: shiftlock.
To prevent the vehicle from creeping
after you select a driving position,
depress the brake until you are ready to
start.<
A lock prevents you from inadvertently engag-
ing selector lever positions R and P. To cancel
the lock, press the button on the front of the
selector lever, refer to arrow.
P Park
Select only when the vehicle is stationary. The
rear wheels are locked.

Driving
58
R Reverse
Select only when the vehicle is stationary.
N Neutral, idle
You can select this in a car wash, for example.
The vehicle can roll.
D Drive, automatic position
Position for normal vehicle operation. All for-
ward gears are selected automatically.
Under normal operating conditions, fuel con-
sumption is lowest when you are driving in posi-
tion D.
Kick-down
Kick-down enables you to achieve maximum
performance.
Press the accelerator pedal beyond the full-
throttle resistance point.
Manual operation and Sport program
M/S
Move selector lever from position D toward the
left into the M/S shifting slot:
The sport program is activated and DS appears
in the instrument cluster. This position is rec-
ommended for a performance-oriented driving
style.
When you press the selector lever forwards or
backwards, the manual mode is activated and
Steptronic changes gear. The instrument clus-
ter shows M1 through M6.
Upshifts and downshifts are executed only
when they will result in a plausible combination
of engine and vehicle speed; thus, for example,
a downshift that would cause the engine to
overrev will not be executed by the system. The gear selected appears briefly in the instrument
cluster, followed by the gear actually in use.
To use the automatic function again, move the
selector lever to the right into position D.
Overriding selector lever lock
Should the selector lever refuse to move out of
position P although the button on the selector
lever is pressed, the selector lever lock can be
overridden:
1.Unclip the sleeve of the selector lever.
2.Pull the sleeve up over the selector lever
until the sleeve is inside out.
3.Using the screwdriver from the onboard
tool kit, refer to page205, press the red
lever while moving the selector lever to the
desired position.
Turn signals/
headlamp flasher
1High beams
2Headlamp flasher
3Turn signals

Driving
60
Activating intermittent wipe or rain
sensor
Press button 3. The LED in the button lights up.
Setting speed for intermittent wipe or
sensitivity of the rain sensor
Slide switch5 up or down.
Deactivating intermittent wipe or rain
sensor
Press button 3 again. The LED goes out.
Deactivate the rain sensor before enter-
ing an automatic car wash. Failure to do
so could result in damage caused by undesired
wiper activation.<
Cleaning windshield and headlamps*
Pull lever 4.
Washer fluid is sprayed onto the windshield and
the wipers are operated for a short time.
When the vehicle lighting system is switched
on, the headlamps are cleaned at regular and
appropriate intervals.
Do not use the washers if there is any
danger that the fluid will freeze on the
windshield. If you do, your vision could be
obscured. Antifreeze should therefore be
added to the fluid, refer to Washer fluid.
Do not use the washers when the washer fluid
reservoir is empty, otherwise you will damage
the washer pump.<
Windshield washer nozzles
The windshield washer nozzles are heated
automatically while the engine is running or the
ignition switched on.
Washer fluid
Washer fluid antifreeze is flammable.
Always keep it well away from sparks and
open flames, and store it in the tightly closed
original container, well out of the reach of chil-
dren. Comply with the instructions on the con-
tainer.<
Washer fluid reservoir
Fill with water and, if required, with a washer
antifreeze, according to manufacturer's recom-
mendations.
Mix the water and antifreeze before filling
the washer fluid reservoir to make sure
the correct concentration is maintained.<
Capacity
Approx. 6.3 US quarts/6 liters.
Cruise control*
The concept
Cruise control is available for use at speeds of
approx. 20 mph or 30 km/h. The car then stores
and maintains the speed that you specify using
the lever on the steering column. In order to
maintain the specified speed, the system
brakes the vehicle when the engine braking
effect is insufficient on downhill gradients.
Do not use cruise control when driving
conditions are unfavorable for driving at a
constant speed. Otherwise you could lose con-
trol of the vehicle and cause an accident as a
result. Unfavorable driving conditions include,
for example, winding roads, heavy traffic or a

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poor road surface, e.g. snow, rain, ice or loose
material.<
Manual transmission/SMG
You can shift gears while cruise control is acti-
vated. An indicator lamp notifies you that you
should shift gears when you drive for an
extended period at very high or very low engine
speeds, or the system is deactivated.
In Drive mode, the SMG acts similarly to an
automatic transmission in position D.
One lever for all functions
1Storing and maintaining speed or accelerat-
ing
2Storing and maintaining speed or deceler-
ating
3Deactivating cruise control
4Resuming a speed stored beforehand
Maintaining current speed
Tap the lever, arrow 1, or pull it briefly, arrow 2.
The car's current speed is stored and main-
tained. It is displayed in the speedometer and
briefly in the instrument cluster.
On uphill gradients, it may prove impossible to
maintain the set speed if current engine power
output is insufficient. If the engine braking
effect is insufficient on downhill slopes, the sys-
tem will brake the vehicle slightly.
Increasing desired speed
Repeatedly press the lever to the resistance
point or beyond, arrow1, until the desired
speed is reached.>Each time the lever is pressed to the resis-
tance point, the desired speed is increased
by approx. 1 mph or 1 km/h.
>Each time the lever is pressed beyond the
resistance point, the desired speed is
increased by up to 5 mph or 10 km/h.
The system stores and maintains the speed.
Accelerating using the lever
Accelerating slightly:
Press the lever to the resistance point, arrow 1,
until the desired speed is reached.
Accelerating significantly:
Press the lever beyond the resistance point,
arrow 1, until the desired speed is reached.
The vehicle accelerates without pressure on
the accelerator pedal. The system stores and
maintains the speed.
Decreasing desired speed
Repeatedly pull the lever to the resistance point
or beyond, arrow 2, until the desired speed is
displayed.
>Each time the lever is pulled to the resis-
tance point, the desired speed is decreased
by approx. 1 mph or 1 km/h.
>Each time the lever is pulled beyond the
resistance point, the desired speed is
re duc e d by up to 5 mph or 10 k m/h until the
minimum speed of 20 mph or 30 km/h is
achieved.
The system stores and maintains the speed.
If the speed is to be reduced significantly,
depress the brake; otherwise, decelera-
tion may be insufficient and dangerous situa-
tions could result.<
Deactivating cruise control
Tap the lever upwards or downwards, arrow3.
The displays in the speedometer disappear.
In addition, the system is automatically deacti-
vated:
>When you brake the vehicle