ECU BMW 540I SEDAN 2000 Owner's Manual

120n
Cargo loading Stowing cargoWhen transporting loads in your BMW:
>Position heavy loads as far forward
as possible Ð directly behind the
backrests or the luggage compart-
ment partition panel Ð and at the bot-
tom (the illustration shows the sport
wagon)
>Cover sharp edges and corners
>Do not pile objects higher than the
top edge of the backrest
>Pull out the separation net
* (refer to
page 116) and ensure that carried
items cannot pass through the sepa-
ration net
>For very heavy loads when the rear
seat is not occupied, secure each
safety belt in the opposite buckle.
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Securing the load >Secure smaller, light pieces with the
retaining straps or a luggage net
*, or
use elastic straps (refer to page 44)
>For large, heavy pieces, visit your
BMW center for load-securing de-
vices
*. Lashing eyes are provided at
the corners of the luggage compart-
ment for attaching these load-secur-
ing devices (the illustration shows the
sport wagon)
>Comply with the information en-
closed with the load-securing de-
vices.
392de178
Always position and secure the
load correctly, otherwise it can
endanger the passengers during brak-
ing or evasive maneuvers.
Do not exceed the permissible gross
vehicle weight and the permissible axle
loads (refer to page 201). If you do, the
operating safety of the vehicle is no
longer ensured and you are in violation
of the law.
Do not carry hard or heavy objects
unsecured in the passenger compart-
ment. If you do so, they may be pro-
jected through the air during braking
and evasive maneuvers, thus endanger-
ing vehicle occupants.<

121n
RepairsIndexOverview Controls Car care Technology Data
Roof-mounted luggage rackMounting pointsAccess to the mounting points:
To fold up the cover (arrow), please use
the tool which is provided with the lug-
gage system.
A special luggage system is available as
an option for your BMW. Please comply
with the precautions included with the
installation instructions.
Because roof racks raise the center of
gravity of the car when loaded, they ex-
ercise a major effect on its handling and
steering response.394de369
You should therefore always remember
not to exceed the approved roof weight,
the approved gross vehicle weight or
the axle weights when loading the rack.
You will find the specifications under
"Technical data" on page 201.
Make sure that the load is not too
heavy, and attempt to distribute it
evenly. Always load the heaviest pieces
first (on the bottom). Be sure that
adequate clearance is maintained for
raising the sliding/tilt sunroof, and that
objects do not project into the opening
path of the luggage compartment lid/
tailgate.
Secure the roof luggage correctly and
tightly to prevent it from shifting or be-
ing lost during driving (danger to follow-
ing traffic).
Drive smoothly. Avoid sudden accelera-
tion and braking maneuvers. Take cor-
ners gently.
The roof load increases aerodynamic
resistance: Increased fuel consumption
and stress on the roof are the immedi-
ate results.

128n
Antilock Brake System (ABS) Disc brakesInformation for your safetyNot even ABS can suspend the laws of
physics. ABS alone cannot prevent
accidents when the brakes are applied
without an adequate safety interval
between vehicles, if the car is driven at
an excessive rate of speed in curves, or
if aquaplaning occurs. Responsibility for
these types of situations remains in the
hands (and at the feet) of the driver.
You should never allow the added
safety of ABS to lull you into a false
sense of security, or mislead you into
taking increased risks that could affect
your own safety and that of others.
Do not make any modifications to
the ABS system.
Service procedures on ABS are to be
performed by authorized technicians
only.<
In the event of a fault
If the ABS warning lamp in the
instrument cluster comes on,
refer to page 23. The brake
system then reverts to conven-
tional operation as on vehicles
without ABS. However, have the
brake system checked by your BMW
center as soon as possible. To prevent
undetected defects and cumulative
faults from adversely affecting the brake
system, refer any problems to your
authorized BMW center at the earliest
opportunity.
Disc brakes furnish optimum decelera-
tion and braking control and greater
fade resistance under heavy use.
When the vehicle is driven only occa-
sionally, during extended periods when
the vehicle is not used at all, and in
operating conditions where brake appli-
cations are less frequent, there is an
increased tendency for corrosion of the
rotors and accumulation of contamina-
tion on the brake pads. This occurs
because the minimal pressure which
must be exerted by the pads during
brake applications to clean the rotors is
not reached.
If the brake rotors are corroded, they
will tend to respond to braking with a
pulsating effect which even extended
application will fail to cure.
For your own safety: Use only
brake pads that BMW has
approved for your specific vehicle
model. BMW cannot evaluate non-
approved brake pads to determine if
they are suited for use, and therefore
cannot ensure the operating safety of
the vehicle if they are installed.<

143n
RepairsIndexOverview Controls Car care Technology Data
HoodTo unlockPull the lever located under the left-
hand side of the instrument panel.
Do not work on your vehicle with-
out appropriate skills. Switch off
the engine and allow it to cool down
before working in the engine compart-
ment. Always disconnect the battery
before working on any electrical
systems or equipment, especially when
these are located within the engine
compartment. Comply with all applica-
ble instructions and warnings. Failure to
work in an informed, professional
manner when servicing components
and materials constitutes a safety
hazard for vehicle occupants and other
road users. If you are not familiar with
the guidelines, please have the opera-
tions performed by your authorized
BMW center.<390de071
To openPull the release handle and open the
hood.390de072
To closeAllow the hood to fall from a height
of about 12 inches (30 cm) so that it
audibly engages.
To avoid injuries, be sure that the
travel path of the hood is clear
when it is closed, as with all closing
procedures.
If it is determined that the hood is not
completely closed while driving, stop
immediately and close it securely.< 390de375

158n
Caring for your carWindow careYou can use window and glass cleaner
to clean inside window surfaces and
mirrors without smearing and streaking.
Never use polishing pastes or abrasive
(quartz) cleansers on mirror lenses.
When caring for break-resistant
security glass
*, observe the fol-
lowing instructions:
The inner surface of the side windows
is coated with a plastic film. For this
reason, do not affix any decals or adhe-
sive stickers on the inside of these win-
dows unless they are to be placed there
permanently.
Wash the glass with clean water. If nec-
essary, you may add a commercially-
available mild household cleaner. Do
not use abrasive cleaners.
If the windows are fogged or iced over,
treat them with an anti-misting cloth or
a deicer spray Ð do not use an ice
scraper.<
Clean the wiper blades with soapy wa-
ter. The wiper blades should be re-
placed twice a year, before and after
the cold season.
Use only wiper blades which have
been approved by BMW.<
Caring for other vehicle
components and materialsLight-alloy wheels should be treated
with alloy wheel cleaner, especially dur-
ing the winter months. However, do not
use aggressive products containing ac-
ids, strong alkalis or abrasives. Do not
use steam cleaners operating at tem-
peratures above 1407 (606). Follow
the manufacturer's instructions.
If your vehicle has chrome parts
* such
as window moldings, door handles or
other items, clean these parts carefully
with ample clean water, especially if
they have an accumulation of road salt.
Use a chrome polish for an additional
treatment.
Plastic components, vinyl upholstery,
headliners, lamp lenses, the clear cover
of the instrument panel and compo-
nents with a sprayed dull black surface
can be cleaned with water (add plastic
cleaner as required). Do not allow mois-
ture to soak through the seats or head-
liner. Never use solvents such as lac-
quer thinner, heavy-duty grease
remover, fuels, etc.Rubber components should be cleaned
with water only; a rubber treatment or
silicone spray may also be applied.
The safety belts should be cleaned with
a mild soap and water solution without
being removed from the car. Never at-
tempt chemical or dry cleaning, as
damage to the belt fabric could result.
After cleaning, never allow the inertia
reel to retract the belts until they are
completely dry. Dirty safety belts pre-
vent the inertia reel mechanism from
retracting the strap properly, and thus
constitute a safety hazard.
Heavily soiled floor carpets and mats
*
can be cleaned with an interior cleaner.
The floor mats can be removed from the
vehicle for cleaning.
Please use only a damp cloth to clean
wooden fascia panels and components.
Follow up by drying with a soft cloth.
Use cleaning and car-care
products that you can obtain
at your BMW center.<

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RepairsIndexOverview Controls Car care Technology Data
Caring for your carLeather careThe leather upholstery
* used by BMW
is a natural product of the highest qual-
ity, processed using state-of-the-art
methods to ensure that it will maintain
its high quality for years to come, pro-
vided that it is properly cared for.
Because this product is manufactured
using natural materials, you must make
allowance for its special characteristics
as well as for the peculiarities of its use
and care.
Regular periodic cleaning and care are
essential, as dust and road dirt act as
abrasives in the pores and creases of
the material. This leads to wear spots
and premature brittleness on the sur-
face of the leather. We therefore sug-
gest that you clean the leather with a
vacuum cleaner or dust cloth at fre-
quent intervals.
For cleaning, use BMW leather cleaning
foam.
Since dirt and grease gradually affect
the protective surface layer of the
leather, the cleaned surfaces should be
treated with a BMW leather care agent.
This also acts as an antistatic agent. For protection against dampness or
moisture, treat the leather with a BMW
impregnating agent.
We recommend that you perform this
procedure twice a year on leather ex-
posed to normal use.
Spills should be wiped up immediately.
Remove grease and oil stains without
rubbing, but rather by dabbing with
spot remover.
If the upholstery is to be exposed to in-
tense sunlight or if the vehicle is to be
stored for an extended period, cover all
leather surfaces (or, better yet, the win-
dows) to prevent fading.
Use cleaning and car-care
products that you can obtain
at your BMW center.<
Cleaning agents can contain sub-
stances that are dangerous or
pose health risks. Therefore, always
comply with the warnings and danger
notices on the package.
Open the doors or windows on your ve-
hicle before cleaning the interior. Never
clean your vehicle with cleaning agents
(or solvents) not specifically intended
for this purpose.<

167n
RepairsIndexOverview Controls Car care Technology Data
Lamps and bulbsThe lamps and bulbs make essential
contributions to the safety of your vehi-
cle. For this reason, follow the instruc-
tions below carefully when replacing a
bulb. If you are not familiar with any of
the procedures, consult your authorized
BMW center.
Do not touch the glass portion of a
new bulb with your bare hands
since even small amounts of impurities
burn into the surface and reduce the
service life of the bulb. Use a clean
cloth, paper napkin, or a similar mate-
rial, or hold the bulb by its metallic
base.<
A replacement bulb set is available from
your BMW center.
Whenever working on the electri-
cal system, switch off the electri-
cal accessory you are working on or
disconnect the cable from the negative
terminal of the battery. Failure to do this
could result in short circuits.
To prevent injuries and damage, comply
with any instructions provided by the
bulb manufacturer.<
The illustration shows the right-hand
engine compartment.
For checking and adjusting head-
lamp aim, please contact your
BMW center.< 1 Low beams H7 bulb, 55 watts 2 High beamsHB3 bulb, 60 watts
The H7 bulb is pressurized. There-
fore, wear safety glasses and pro-
tective gloves. Failure to comply with
this precaution could lead to injury if the
bulb is accidentally damaged during re-
placement.< 390de098
Low beams:
1 Turn the bulb holder to the left (arrow)
and remove.
2 Remove and replace the bulb.
High beams:
1 Turn the bulb holder to the left and
remove.
2 Disconnect the plug.
3 Connect the new bulb holder with
bulb to the plug. Be sure that it is
securely engaged.
4 Install in the opposite order of work.
When cleaning the headlamps,
please observe the following:
>Do not clean by wiping with a dry
cloth (scratches). Never use abra-
sives or strong solvents to clean the
covers
>Remove dirt and contamination
(such as insects) by soaking with
BMW Car Shampoo and then rinsing
with plenty of water
>Always use a deicer spray to remove
accumulated ice and snow Ð never
use a scraper.<

174n
Changing tires>Spare tire and adapter
* for removing
the lug bolt cover
* (refer to the next
column)
Both are next to the jack. Remove the
adapter or the plastic cover. Unscrew
the wing nut (arrow) by hand and re-
move the wheel
>Lug wrench and screwdriver
In the vehicle tool kit under the lug-
gage compartment lid (refer to
page 166).
sport wagon: The lug wrench is next
to the spare tire.
394de091
Procedure1 Read carefully and comply with the
safety precautions on the previous
page.
2 Secure the vehicle against rolling:
Place the wedge against the rear
surface of the front tire on the side
opposite the side being raised. If
the vehicle is parked on a down-
ward slope, place the wedge se-
curely in front of the tire. If the
wheel must be changed on a sur-
face with a more severe slope, take
additional precautions to secure the
vehicle from rolling.
3 Wheels with full wheel covers
*:
Reach into the ventilation openings
and pull the cover off.
4 Wheels with adapter
*: Position the
lug bolt adapter on the lug bolt
cover. Then apply the lug wrench
and turn it to the left (refer to the
illustration).
380de092
5 Wheels with hub cover
*: Pry the
hub cover off with the screwdriver in
the slot.
6 Loosen the lug bolts 1/2-turn.
7 Position the jack at the jacking point
closest to the flat tire so that the
jack base is vertically below the
jacking point and the entire surface
of the head of the jack will move
into the square recess of the jacking
point (refer to the illustration detail)
when the jack is cranked.
8 Jack the car up until the wheel you
are changing is raised from the
ground.
9 Unscrew the lug bolts and remove
the wheel.
10 Remove accumulations of mud or
dirt from the mounting surfaces of
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175n
RepairsIndexOverview Controls Car care Technology Data
Changing tires
the wheel and hub. Clean the lug
bolts.
11 Position the spare wheel. Secure
the wheel by turning at least two lug
bolts into opposite bolt holes.
12 Screw in the remaining lug bolts.
Tighten all the bolts securely.
13 Lower the jack and remove it from
beneath the car.
14 Tighten the lug bolts in a diagonal
pattern.
15 Wheels with full wheel covers: Place
the wheel cover with the valve
opening over the valve (arrow). Use
both hands to press the cover se-
curely onto the rim.
For this light-weight wheel, use
only the full wheel cover installed 390de360
by the factory. Other wheel covers may
not fit securely.<
16 Wheels with hub covers:
Position the hub cover and press it
on tightly.
17 If equipped with lug bolt covers:
Align the arrow on the cover with
the line in the wheel and press the
cover into place.
18 Check and correct the air pressure
at the earliest opportunity.
For vehicles with Tire Pressure Con-
trol (RDC)
*:
After mounting the spare tire or cor-
recting the inflation pressure, reacti-
vate the system. Refer to page 92.The vehicle jack is designed for
changing tires only. Do not
attempt to raise another vehicle model
with it or to raise any load of any kind.
To do so could cause accidents and
personal injury.
To ensure continued safety, have the
lug bolts checked with a calibrated
torque wrench [torque specification
72 lb-ft (100 Nm)] at the earliest
opportunity.<
When storing the wheel, take care to
ensure that you do not damage the
retaining pin in the spare tire recess.
If light-alloy wheels other than original
BMW light-alloy wheels have been
mounted, it may be necessary to use
different lug bolts for those wheels.
Replace the defective tire as soon as
possible and have the new wheel/tire
balanced.

178n
Battery Fuses Removal and installation
Do not disconnect the battery
when the engine is running. Dis-
connecting the battery cable when the
engine is running will cause a voltage
surge which will damage the vehicle's
onboard electronics.
Do not make any modifications in the
wires to the positive terminal. If you do
so, the protective function of the safety
battery terminal is no longer ensured.
Repairs and disposal may only be
performed by specially-trained person-
nel.<
390de611
When removing the battery, first dis-
connect the negative terminal, then the
positive terminal. Remove the protec-
tive bar (1) and unscrew the threaded
connection of the battery bracket (2).
When installing the battery, connect the
positive terminal first, then connect the
negative terminal.
When installing a battery, be sure
that it is mounted properly. Install
and secure the protective bar. If the
battery is not mounted and fastened
properly, it will not be adequately
secured in case of an accident.<
Return used batteries to a recy-
cling point or your authorized
BMW center. Maintain the battery in an
upright position for transport and stor-
age. Secure the battery against tilting in
transit.<
When an electrical accessory fails to
operate, switch it off and inspect the
fuse.In glove compartment1 Open the glove compartment and
turn the two white quick-release
knobs to the left. Spare fuses and
plastic tweezers are located on the
fuse holder.
2 Use the plastic tweezers to remove
the fuse for the accessory or equip-
ment that has stopped working.
3 If the fuse is burned through (the
metal strip will have melted and sep-
arated), replace it with a new fuse of
the same ampere rating (color code).390de085