light BMW 540I SEDAN 2001 Workshop Manual

202nTowing the vehicle
The towed vehicle should always
be the lighter of the two vehicles.
If this is not the case, it is no longer
possible to control vehicle response. <
Tow-starting
It is not possible to start the engine of
vehicles equipped with an automatic
transmission by towing or pushing.
For instructions on jump starting, refer
to page 200.
Never attempt to use your vehicle to
push another vehicle, since damage to
the energy-absorbing bumpers could
result.
Towing a vehicle with automatic
transmission
1 Place the selector lever in position N.
2 Towing speed: Max. 45 mph (70 km/h).
3 Towing distance: Max. 95 miles (150 km).
4 Leave the ignition key in position 1 to ensure that the brake lamps, turn sig-
nals, horn and windshield wipers re-
main operative, and to prevent the
steering lock detent from engaging.
5 Switch on the hazard warning flash- ers (observe country-specific regula-
tions).
Find some means of identifying the ve-
hicle in tow, for instance, place a sign
or warning triangle in the rear window.
Make sure that the ignition key
remains in position 1 even when
the electrical system has failed to pre-
vent the steering lock from engaging.
The steering and brakes are without
power assist when the engine is off.
This means that increased effort is
required for steering and braking. <
Towing with a commercial
tow truck
> Do not tow with sling-type equip-
ment.
> Use a wheel lift or flat bed carrier.
> Please comply with applicable towing
laws.
Never allow passengers to ride in
a towed vehicle for any reason. <
380us124

Index
Data
Technology
Repairs
Car care
Controls
Overview
211nDSP sound system*Mirrors with automatic dimmer*
The DSP professional premium sound
system features a special amplifier
combined with Digital Sound Process-
ing (DSP) and integrated speakers to
surround you with crisp, true-to-life
sound reproduction.
The speaker system's subwoofers,
woofers, midrange speakers and tweet-
ers furnish you with an impressively full-
bodied listening experience. The indi-
vidual components are oriented so as
to produce the aural sensation that you
would experience facing the stage in a
concert hall. The system also automati-
cally adjusts the bass and treble set-
tings to compensate for changes in vol-
ume and vehicle speed.
390de109
The interior and exterior mirrors with
automatic dimming feature reduce the
glare from following traffic by adapting
the intensity of the reflected images to
correspond to levels of light registered
by the unit's sensors. The mirrors revert
to their undimmed setting as soon as
the light source disappears.
One sensor is mounted on the front
of the interior mirror housing and is
designed to monitor light levels in the
area immediately forward of the vehicle.
A second sensor is integrated within
the mirror's glass.
390de113
The electronic control system operates
by comparing the respective levels of
luminous intensity in front of and behind
the car. The difference provides the
basic parameter used to modulate an
electrical current and induce chemical
changes in a semisolid layer incorpora-
ted in the lens.
The semisolid reacts chemically to this
electrical current, thus providing infi-
nitely-variable dimming of the mirror
(electrochromic technology).
As a result, it is no longer necessary
to dim the mirror manually, and the
driver can maintain full concentration
on traffic.

212nRain sensor*
Depending on the degree of wetness
on the windshield, the rain sensor
controls the operation of the windshield
wipers.
Infrared light is carried along the
surface of the windshield in an optical
conductor in such a manner that it is
reflected completely when the wind-
shield is dry. The quantity of reflected
light is measured.
If the window is covered with beads of
water, the amount of light that is
reflected is decreased since the infra-
red light at the surface of the wind-
shield can then escape. The quantity of
reflected light is thus a means of
gauging the degree of wetness on the
windshield.
390de133
When the system is set to the "Intermit-
tent" wiper speed, the wipers react
immediately – if water is splashed onto
the windshield by vehicles traveling
ahead of you, for example. As a result,
the rain sensor provides a contribution
to driving safety and comfort.

214nIntegrated rear suspension Level control system*
The control arms on the patented inte-
grated aluminum rear axle assembly are
not mounted directly on the body. They
are mounted elastically on a chassis
sub-frame which is joined in turn with
elasticity to the vehicle body. The result-
ing double elastic suspension system
effectively absorbs the forces resulting
from bumps and road surface irregulari-
ties.
The compliance rates of the integrated
rear axle assembly's control arm mounts
have been precisely calibrated to help
provide supplementary adjustment in
the tracking angle of the rear wheels
(programmed self-steer effect). The ulti-
mate result is enhanced safety and con-
trol under all conditions.
390de114
The illustration shows the rear axle of the
sedan. With the lightweight, compact
rear axle of the sport wagon, the shock
absorbers are positioned at an angle.
The level control system for the rear
axle maintains constant ground clear-
ance of your vehicle, even when carry-
ing a load.
To achieve this, the vehicle is equipped
with air struts at the rear axle instead of
conventional shock absorbers and steel
suspension springs. With the help of
two sensors, an electronic control unit
calculates the height of the body at all
times and, if it is required, it allows air
which is generated in a compressor to
flow into the air springs.
As a result of the pressure increase in
the air springs, the level control system
ensures not only constant ride height,
but also ride comfort which is indepen-
dent of the load the vehicle is carrying.
390de136

Index
Data
Technology
Repairs
Car care
Controls
Overview
215nXenon lamps*
The xenon lamps light up the side and
front areas of the vehicle with signifi-
cantly more brightness and uniformity
then the traditional halogen lamps.
In a xenon lamp, an electric arc
replaces the filament in order to gener-
ate intense illumination. A gas mixture
in a quartz glass tube with metal vapor
is ignited by a high electric voltage. The
arc that is generated is then sustained
by a lower voltage.
When the lamp is turned on, a brief
period is needed for the full beam
strength to build up. Maximum bright-
ness is attained in approx. 15 seconds.
390de134
Xenon lamps provide significantly
improved visibility, especially during
adverse weather conditions and driving
situations (driving at night in heavy rain
or through road repair areas where
there are no lane markers, for instance).
Vehicles with xenon lamps
are
equipped with automatic headlamp
range control. As a result, the highway
is always optimally lighted, regardless
of load conditions, and drivers in on-
coming traffic are not blinded.
Xenon lamps make a significant contri-
bution to highway safety since other
highway users, or bicyclists and motor-
cyclists in the right lane, and pedestri-
ans are more easily detected.

Everything from A to Z

229n

IndexDataTechnologyRepairsCar careControlsOverview

Car jack190

t

Car keys36
Car Memory60
Car phones, refer to the
seperate Owner's Manual
Car radio reception149
Car telephone125
Car wash171
Care
vehicle exterior172
vehicle interior174
Cargo loading136
Caring for the vehicle
finish173
Catalytic converter142
Cellular phone149
Center (high-mount) brake
lamp, bulb
replacement187
Central locking
system38, 42
Changing a tire190

t

Changing a wheel190

t

Charge indicator lamp22
Charging the battery194

t

Check air pressure30
Check button86
Check Control86

t

Check engine oil
level165

t

Check tire pressures29

t

Child restraint systems62
Child seat62, 66Child seat security67
Child-safety locks67
Cigarette lighter126
Cleaning headlamps79
Cleaning windshield78, 79
Clock92
Clock, refer also to the
onboard monitor
Cockpit16
Code98
activating98
de-activating98
selecting98
Cold start69
Combination switch78
Comfort seat54
Compartments124
Computer89, 95
average fuel
consumption89
average speed89
cruising range89
outside temperature89
remote control99
Computer, refer also to the
onboard monitor Owner's
Manual
Configure settings60
Consumption display84
Consumption, fuel97
Contamination on
paintwork172Convenience operation
sliding/tilt sunroof38
windows38
Convenience starting
feature69
Coolant146, 167
antifreeze146
temperature gauge85
Copyright notice4
Courtesy lamp, bulb
replacement189

t

Cover, sun blinds120
Cruise control81
Cruising range89, 97
Cup holder125
Curb weight221

D
Dashboard16
Data link connector for
Onboard Diagnostics178
Date
calling up92
changing92
Date, refer also to the
onboard monitor Owner's
Manual
Daytime-driving lamp105
DBC (Dynamic Brake
Control)23, 100, 145Deactivating99
interior motion
sensor40, 48
tilt sensor alarm
system40, 48
Deep water141
Defrost
rear window80

t

Defrost position113, 117
Defrost
windows113, 117

t

Difficult steering148

t

Digital clock92
Digital sound
processing211
Dimensions219
Dipstick, engine oil165

t

Disc brakes144
Disconnect the
battery195

t

Displacement218
Display lighting105
Displays18, 20
Distance96
Distance warning100
Diversity Antenna
system209
Divided rear-seat
backrest128
Door keys36

Everything from A to Z

Door locks, care146
Doors
emergency release38
manual operation38

t

remote control40
unlocking and locking38
DOT Quality Grades151
Drive belts224
Driving in winter146
Driving notes141
Driving through water141
DSC (Dynamic Stability
Control)24, 102, 208
DSP sound system211
refer also to the Radio
Owner's Manual
Dynamic Brake Control
(DBC)23, 100, 145
Dynamic Stability Control
(DSC)24, 102, 208

E
Electric power seat52
Electric power windows49
Electrical defect
fuel filler door198

t

sliding/tilt sunroof198

t

tailgate199
Electrical heating, exterior
mirror57
Electrical steering wheel,
adjusting56Electrical system224
Electronic vehicle
immobilizer37
Elements of operation16
Emergency operation
doors38

t

fuel filler door198

t

luggage compartment lid/
tailgate43, 199

t

sliding/tilt sunroof198

t

Energy control84
Engine
compartment160
coolant167
Engine oil
consumption165
grades166
level23
pressure22
specifications166

t

Engine specifications218
Error indicators86
Estimated time of arrival97
Exterior finish172
Exterior mirror56
electrical heating57
Exterior mirror with
automatic dimming
feature211

F
Failure messages86

t

Failure of an electrical
accessory196

t

Failure warnings86

t

Filler cap cover28
Filling capacities223
Filling the washer
reservoir164

t

First-aid kit27

t

Fittings, tow-starting and
towing201

t

Flashlight124
Flat tire150, 190

t

Fog lamp, bulb
replacement185

t

Footbrake144
Footwell lamps107
bulb replacement189

t

Forward/backward
adjustment, seats52, 55
Front fog lamps106
Front seat adjustment52
Frost protection,
radiator167
Fuel29
gauge84
quality29
tank capacity223
Fuel consumption97
average97
indicator84Fuel filler door, release after
electrical fault198
t
Fuses196

t

, 197

G
Gasoline29
gauge84
quality29
Glove compartment124
bulb replacement189
t

Gross vehicle weight221

H
Handbrake23, 70
Hands-free system125
Hazard warning
flashers27

t

Hazard warning
triangle27

t

Head restraints53
Headlamp covers,
care171

t

, 183

t

Headlamp flasher78
Headlamp washer
system164
Heated seats119
Heated steering wheel120
Heating and
ventilation108, 114
Heating while stopped118
Heating, rapid113
Heavy loads136

Everything from A to Z

231n

IndexDataTechnologyRepairsCar careControlsOverview

Height219
Height adjustment
seats52
steering wheel56
Help with jump
starting200

t

HiFi system211
High beams24
bulb replacement183

t

High Performance Synthetic
Oils166
High-mount brake lamp187
Hood release159

t

Horn25
Hydraulic Brake Assistant,
refer to DBC23, 100, 145

I
Ice warning83
Identification number of the
vehicle169
Identification, tires153
Ignition key36
Ignition lock68
Imprint4
Independent
ventilation94, 120
Independent ventilation,
refer also to the onboard
monitor Owner's Manual
Indicator lamps22

t

Inflation
pressure29

t

, 30, 150
monitoring103, 213
INSPECTION85
Instrument cluster18, 20
Instrument lighting105
Instrument panel20
Instrument panel switch78
Instruments18
Integrated rear
suspension214
Intensive
cleaning78, 79, 164
Interaxle tire rotation152
Interference indicators86
Interference with
car phones149
Interior lamps106
bulb replacement188

t

remote control40
Interior mirror57
with automatic dimming
feature211
Interior motion sensor48
deactivation48
Interior rearview mirror
with automatic dimming
feature57
Interlock68
Intermittent mode78

J
Jack190

t

Jump starting200

t
KKey Memory60
Key, transmitter36
Keys36
Keys with remote control36
Kickdown73, 76LLashing eye136
Leather care175
Length219
Level control
system23, 214
inactive148t
License plate lamps, bulb
replacement188t
Light switch105
Light-alloy wheels156
Lighter126
Lights-on warning105
LIMIT95
Load-securing devices136
Locking and unlocking the
doors38
Louvers108, 114
Low beams105
bulb replacement183tLow-fuel warning lamp84
Lug bolts191
Lug wrench191t
Luggage compartment46
capacity221
hanger46
lamps106
Luggage compartment
lamps, bulb
replacement189t
Luggage compartment lid/
tailgate43
emergency actuation43
opening separately43
remote control41
secure separately43
unlock in case of electrical
fault43t
Luggage space46
Luggage straps46
Lumbar support54
MM+S tires154
Magic Eye194
Maintenance85t, 170t
Malfunction displays86t

Everything from A to ZManual operation
doors38t
fuel filler door198t
luggage compartment lid/
tailgate43, 199
sliding/tilt sunroof198t
tailgate199t
Manual transmission70
Manually controlled
recirculated-air117
Master key36
Mechanical seat53
Memo93
Memory58
MFL (Multifunction steering
wheel)25
Microfilter112, 119
MID (Multi-Information
Display)91
computer95
digital clock92
Mirror56
heating57
memory58
Mirrors with automatic
dimming feature211
Mobile communication
systems, refer to the
separate Owner's Manual
Mobile phones149
Modifications,
technical6, 177
Moonroof51Multifunction steering wheel
(MFL)25
Multi-Information Display
(MID)91
NNeck rest53
Nonsmoker equipment126
Nozzles114OOBD connector178
OBD interface socket178
Odometer83
Oil
additives165
consumption165
grades166
Oil change interval, refer to
the Service and Warranty
Information Booklet (US
models) or to the Warranty
and Service Guide Booklet
(Canadian models)
Oil dipstick165
Oil level, indicator lamp23
Oil pressure, indicator
lamp23
Oil specifications166t
OILSERVICE85
Old batteries195Onboard computer, refer
also to computer
Onboard monitor, refer also
to the separate Owner's
Manual
Onboard tool kit182t
Opening and closing
from the inside42
from the outside38
Operating range89
Outlets, ventilation108, 114
Outside temperature89
display83
PPaint
blemishes172
care172
minor repairs173
waxing173
Paintwork, refer to paint
Park Distance Control
(PDC)100
Parking184
Parking brake23, 70
Parking help100
Parking lamp, bulb
replacement184t
Parking lamps106
Parking, winter148PDC (Park Distance
Control)100
Playing cassettes, refer to
the Radio Owner's Manual
Playing CDs, refer to the
Radio Owner's Manual
Pocket light124
Pollen112
Pollen filter119
Power51
Power steering148
Power windows49
safety switch50
Power-slip control, refer to
ASC+T/DSC102
Pressure, tire30, 150
monitoring103, 213
Pressure, tires29t, 150t
RRadio149
refer also to the separate
Owner's Manual
Radio reception149, 209
Rain sensor78, 171, 212
RDC (Tire Pressure
Control)103, 213
Reading lamps107
Rear window blind120
Rear window
defroster80, 110, 118
Rear window wiper80