1999 BMW 528i BC switch

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1 Brakes
ABS COMPONENT REPLACEMENT
CA UTIOW-
If the tires on the car are of different makes, the ABS/trac-
tion controlsystem may overreact. Only fit tires of the same
make and treadpattern.
In adverse conditions, such as trying to rock the car out
of deep snow or other soft surface, or when snow
chains are fitted, it is advisable to switch off traction
control and allow
tlie car driveline to operate conven-
tionally.
All E39 vehicles are equipped with
Antilock Braking System
(ABS). Early production models featured ABS with Automatic
Stability Control (ABS
I ASC). Later models came equipped
with ABS and Dynamic Stability Control (ABS
/ DSC). This
manual will refer to these systems as ABS. ASC or DSC will
be specified when necessary.
For ABS system and component descriptions, see
300 Sus-
pension, Steering and Brakes-General.
Wheel speed sensor, replacing
- Raise applicable end of car.
Make sure that the car is firmly supported on
jack stands de-
signed for the purpose. Place
jack stands beneath structural
chassis points. Do not place jack stands under suspension
< Front sensor: Unscrew mounting bolts (arrows) at steering
knuckle.
4 Rear sensor: Unscrew mounting bolt (arrows) in rear wheel
bearing carrier.
NOTE-
ABS wheelspeed sensor application may vary depending on
traction control system installed.

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1 Brakes
- Remove precharge pump mounting bracket fasteners and re-
move pump.
- Installation is reverse of removal, noting the following:
Be sure to replace rubber pump mounts if damaged
01
worn.
Bleed brakes as described earlier.
Tightening torque Brake line
to precharge pump 18 Nrn (13 ft-lb)
DSC pressure sensor (1 999 - 2002 models)
On 1999 and later DSC systems, the DSC pressure sensor is
screwed into the DSC hydraulic unit (right rear of engine com-
partment).
WARNING-
* €39 cars require special BMW service equipment to prop-
erly bleed the brakes. Removal of the
DSCpressure sensor
is not recommended unless this equipment is available. For
safety reasons, the brake system on cars with ABS must be
bled using the procedures described in this repair group.
Switch off ignition and remove
key to male sure brake
system cannot be activated.
- Disconnect electrical harness connector at switch.
- Use BMW special tool 34 5 160 to remove and install sensor.
Inspect threads and sealing surfaces for damage.
* Work quicltly to avoid excessive brake fluid leakage.
Tightening torque
Pressure sensor
to hydraulic 19 Nrn (14ft-lb)
unit
- Reconnect harness connector
- Bleed front brakes as described earlier.
- Press on brakes and check for leaks at sensor.
- Turn on ignition and firmly depress brake pedal. Check that
DSC warning light does not come on.

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400-5
Body-General
Tailgate
The E39 Sporl Wagon tailgate is large with a low sill for easy
cargo loading. The tailgate opens to an angle of
88" mea-
sured from the rear roof pillar (D-pillar) and to a height of
2029
mm (79.8 in) measured from the ground to the upper edge of
the raised tailgate.
The rear window is bonded to a load bearing frame and can
be opened separately from the main tailgate. Tailgatesupport
gas springs are recessed into cavities in the roof.
Tailgate lock system
A mechanical tailgate lock cylinder is not used; the tailgate is
opened by the unlock pad above the license plate, the remote
tailgate switch located in the drivers kick panel, or via
FZV
(Iteyless entry) control.
4 An emergency release mechanism is incorporated into the
latch assembly to open the hatch from the vehicle interior if a
malfunction occurs.
The tailgate lock assembly includes an automatic soft close
(SCA) feature. The electrical operation of SCA is a function of
central body electronics
(ZKE Ill). The SCA actuator is locat-
ed in the rear cowl panel below the tailgate. The actuator is
controlled by a load relay in the General Module. A locking
cam is mounted on an eccentric that is driven by the actuator.
4 The SCA cam always turns in the same direction to open or
close the tailgate. The cam turns
180" to open or to close.
When the cam turns in the up direction the notch in the cam
SCA actuator pushes on a lever on the back of the latch in the tailgate. This
mechanically unlocks the latch. The tailgate is raised up and
can be opened.

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.
I Body-General 1
Rear wiper system
The rear wiper assembly on the E39 Sport Wagon is a self-
contained unit. The control electronics are integrated into the
gear drive that is part of the motor assembly. The control elec-
tronics contain two hall sensors, one
forthe park position and
one
forthe end stop or to signal reverse direction of the wiper
motor.
-
Wiperlwasher
stalk switch
/ 4 - 3
502400100
4 The rear wiper is controlled through the stalk switch on the
steering column. The switch includes the following functions:
Intermittent rear window wiping
Programmed rear window wiping interval
Operation of rear window washer
The wiper system automatically controls the following safety
and convenience features:
* Wiper interrupted when rear glass is opened
Wiper interrupted if wiper arm is blocked
Continuous wiping when vehicle is shifled into reverse
Antenna and sound system
4 There are two diversity FM antenna amplifiers:
FMI amplifier located in the rear window frame
FM2 / FZV amplifier located in the lefl D-pillar
The radio amplifier and CD changer are behind the side
ac-
cess panels in the cargo compartment:
CD changer on lefl side
Sound system subwoofer on right side
The subwoofer has a hold down knob and is mounted on a
hinge. It can be swung out to access
the batteryand fuse pan-
el by unscrewing the knob.

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400-9
Body-General
Battery safety terminal
(BST)
4 Starting with 1999 models (9198 production and later), a py-
rotechnic (explosive charge) device automatically discon-
nects the battery positive terminal during impacts. Key
features,
like power windows and door locks, remain opera-
tional.
Security
Electronic immobilization (EWS)
Ignition key transponder signal All
E39 vehicles incorporate an electronic immobilization sys-
tem known as EWS. This svstem uses a wireless comrnuni-
cation link between a transponder chip in the ignition key and
the ring antenna surrounding the ignition switch. The EWS
control module blocks the starting of the vehicle unless the
correct coded ignition key is used.
NOTE-
Electronic immobilization is sometimes referred to as the
driveaway protection system.
Antitheft alarm (DWA)
This is adealer-installed option for which the E39 vehicles are
factory-wired. When armed, the system monitors door
loci(
contacts and trunk and engine hood locks and sounds a siren
if it detects tampering.
E39 interiors have a unique character, with a combination
of
sporty features and innovativedesign. All body versions were
made in a wide choice of interior and exterior colors. New col-
ors with matching leather or leatherette upholstery were intro-
duced for each model year.
Driving
comfort is enhanced by power steering, tilt steering
wheel, height-adjustable front seats, and electrically adjust-
able and heated rear-view mirrors. Inside the car there are
reading lights at four seating positions.

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400-1 0
Body-General
Seats
4 Anatomically correct seats are constructed from polyure-
10 way seat adjustment thane foam
containing areas or "zones" of different firmness.
They offer good lateral support without constricting the occu-
pant.
The seats have a passive internal ventilation system: Cylin-
drical cavities within the cushions and backrests generate a
pumping effect as the ride motions cause occupant motion.
This
helps remove moisture and feeds fresh air into the seats.
Other features of the seating system:
The seat bases have steel springs for added support and
strength.
The seat control switches are along the outside edge of
the
seat.
Heated seats are an option in all models
In cars equipped with seat position memory, three different
seat confiaurations can be memorized by the seat control
module(s): Seat memory coordinates with outside mirror
memory. These functions are controlled by the seat mem-
ory
module(s).
* For security reasons, the release lever to fold the rear seat
backrest forward is installed in the trunk.
Sport Wagon models: Rear seat
baclts are split 60140, with
the center armrest on the left seat back.
The center armrest incorporates a non adjustable head-
rest. When folded down, the armrest opens out with
cup-
holders and a storage compartment. See 520 Seats for
more details.
instruments and controls
Everything in the interior passengercompartment essential to
the driver is logically grouped and easy to reach. All instru-
ments and controls have been arranged ergonomically and
are fully integrated into the overall design of the vehicle.
Tilt-telescopic steering wheel has
30 mm (1.2 in) of vertical
and longitudinal adjustment.
Multifunction steering wheel contains two
ltey pads con-
taining controls for the sound system, telephone and
cruise control.
Padded dashboard houses the instrument cluster and the
ventilation and heating system.

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Hood, raising to service position
CAUTION-
Do not switch on the windshield wipers with the engine
hood raised. As a precaution, remove the wiper
motor
fuse. See 610 Electrical Component Locations.
The
hoodis heavy Before removing the hoodsupports,
be sure to have an assistant help support the hood.
< Open hood fully. With the help of a partner, support hood and
remove retaining clips (arrow) on upper end of pressurized
lifting struts. Pull struts off hood.
< Raise hood to service position and loclc in position by placing
bolts (arrow) in right and
left hinges.

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WARNING -
E39 cars are fitted with side-impact airbags in the front doors
and optional side impact
airbags in the rear doors. When
servicing doors, always disconnect the negative
(-) battery
terminal. See
721 Airbag System (SRS) for cautions and
procedures relating to the
airbag system.
Door trim panel, removing and installing
Disconnect negative (-) battery cable.
CAUTION--
Prior to disconnecting the battem read the batfew discon-
nection cautions given in
001 General Cautions and warn-
ings.
Q Open door, and remove screw (arrow) located
in air
duct.
< Pry out seat memory switch and disconnect wiring harness.