Page 164 of 189
164n
Radio reception Safety belt tensionerAM radio provides reception across a
considerable distance because the
broadcast signals not only travel along
the ground as surface waves, but they
are also reflected from the ionosphere
as atmospheric waves.
Frequency-modulation (FM) provides
substantially better sound quality than
AM. However, because FM transmis-
sions rely on line-of-sight broadcast
waves, their effective reception range is
limited. 360de084
The limitations inherent to radio recep-
tion in a moving vehicle have been min-
imized by a number of innovative sys-
tem designs:
The "Radio Data System" (RDS) makes
sure that, for broadcast stations send-
ing on several frequencies, the radio
automatically tunes to the frequency
with the best reception quality.
The Diversity Antenna system employs
several FM antennas integrated within
the rear window to provide three sepa-
rate sources for receiving broadcast
waves. An integral processor automati-
cally selects the antenna with the best
FM reception quality at any given time.
The selection of the antenna takes
place within milliseconds, and is there-
fore not noticed by the radio listener.The safety belt tensioner responds to
severe collisions by tightening the belts
to ensure that occupants remain firmly
positioned in their seats. A gas-pressure
system retracts the buckle assembly
to tension the shoulder and lap belts
within fractions of a second. This re-
duces the tendency to slide under the
lap belt.
390de330
Page 168 of 189
168n
Self-diagnostics All of the important electrical and elec-
tronic systems in the vehicle are tested
regularly and automatically Ð the driver
does not have to perform any extra
operations or adjustments.
The indicator lamps also come on
briefly after the ignition has been turned
on.
While you are driving, the functional
status of the actuator motors (for the
windshield wipers, power windows,
seats, sunroof, etc.) is constantly ana-
lyzed by current measurements in their
relays.460de177
In the same manner, the electrical re-
sistance of the airbag ignition genera-
tors and all of the remaining airbag
components is measured at all times.
Any fault in this system would be de-
tected immediately by a current fluctua-
tion that would necessarily accompany
it. The fault would be indicated immedi-
ately by the airbag warning lamp.
Even after you shut off the engine, the
overall functional status of your vehicle
is monitored. For example, all of the
flaps of the heating and ventilation sys-
tem travel to the nearest limit position.
This action ensures that the system will
be able to provide defrosting, regard-
less of other circumstances (if a mal-
function in the heating or ventilation
system should occur during the night
while the vehicle is parked, for in-
stance).
A calibration cycle runs every tenth time
the engine is shut off. During this cycle,
the actuator motors of all the heating
and ventilation flaps travel to their limit
stops in both directions. The limit posi-
tions and the return travel paths are
checked in this manner in order to en-
sure that appropriate adjustments for
the operating elements can be made at
any time.You will hear the sounds of the air flaps
as the heater/ventilation system carries
out its self-diagnostic functions after the
ignition is shut off. All of the other self-
diagnostics functions operate silently in
the background.
Any faults detected during these self-
diagnostics can be read out by your
BMW center during the next regularly-
scheduled maintenance and corrected
with a minimum of time.
Page 182 of 189
Everything from A to ZGlove compartment lamp
bulb replacement148
Gross vehicle weight174HHandbrake63
Handsfree system95
Hazard warning flashers25
Hazard warning triangle25
Head restraint48
Headlamp covers,
care132, 143
Headlamp flasher83
Headlamp washer
system124, 175
Headlamp washers70
Heated seats91
Heavy loads99
Height173
HiFi system Ð harman
kardon92
High beams23, 68, 83
bulb replacement143
Hood release120
Horn17
Hubcap150IIce warning76
Icy roads76
Identification, tires116Ignition key32
Ignition lock61
Indicator lamps20
Inflated pressure27, 113
Inflation pressure
monitoring80, 167
INSPECTION74
Installing a child restraint
system60
Instrument cluster18
Instrument lighting82
Instrument panel18
Interaxle tire rotation115
Interface socket96
for Onboard
Diagnostics139
Interference
cellular phones112
Interior lamps36, 83
bulb replacement147
remote control36
Interior motion sensor42
Interior rearview mirror52
automatic dimming
feature53, 165
Interlock61
Intermittent wipe68
JJack149
Jump-starting157
KKey Memory53
Keys32
with remote control32LLAMPS ON warning82
Lashing eyes99
Leather care136
Length173
License plate lamp
bulb replacement147
Light switch82
Light-alloy wheels118
Lighter96
Load-securing devices99
Louvers86
Low beam headlamps82
Low beams
bulb replacement143
Lug bolts150
Lug wrench149
Luggage compartment41
capacity174
floor mat41
floor panel41
remote control37
Luggage compartment
lamps
bulb replacement148Luggage compartment
lid39
emergency release39
securing separately39
Luggage compartment
lighting39
Luggage rack100
Lumbar support49
MM+S tires117
Maintenance74, 131
Malfunction displays75
Manual transmission64
Manually controlled
recirculated-air89
Memory50
MFL (Multifunction steering
wheel)24
Microfilter90, 155
Mirror memory50
Mirrors52
Mobile phones112
Modifications,
technical6, 138
Multifunction steering wheel
(MFL)24NNeckrest48