1998 BMW 750IL SEDAN service

174n
BatteryDo not short circuit the battery termi-
nals. This creates a risk of personal in-
jury from high-voltage sparks.
A highly-explosive gas is
generated when the battery is
charged.
If you happen to get acid in
your eyes, rinse thoroughly for
15 minutes with clear water.
Consult a physician immediately. If you
get acid spray on your skin or clothing,
rinse with plenty of water. If electrolyte
is accidentally ingested, consult a phy-
sician immediately.
In order to protect the battery
case from ultraviolet radiation,
do not place it in direct sunlight.
A discharged battery can freeze. Store
the battery in areas where temperature
remains above freezing.Car careThe battery is completely maintenance-
free, that is, the original electrolyte will
normally last for the service life of the
battery.
Charge condition – BMW 740i/LYou can read the charge condition of
the battery with the "Magic Eye" (a hy-
drometer) (not released at this time):
>Green: Adequate charge
>Black: Not charged adequately. The
battery must be recharged. Please
contact your BMW center
>Yellow: Replace the battery.380de655
Charging the batteryCharge the battery in the vehicle only
when the engine is off. Charge the bat-
tery using the supplementary positive
terminal and ground (terminal) in the en-
gine compartment (refer to "Jump-start-
ing" on page 179).
On the BMW 750iL, there is an auto-
matic switch between the two batteries
during charging.
Before performing any work on
the electrical system, disconnect
the cable from the negative terminal. If
you do not, short circuits can create the
risk of fire or personal injury.
If a jump start is necessary, connect the
cables only to the auxiliary terminal for
jump starting and a ground in the en-
gine compartment in order to avoid
damage to the batteries (refer to
"Jump-starting" on page 179).<

175n
RepairsIndexOverview Controls Car care Technology Data
BatteryIf you plan to store the vehicle for
longer than 4 weeks, disconnect the
battery from the vehicle electrical sys-
tem by disconnecting the cable at the
negative terminal.
If you intend to store your car for longer
than six weeks: Remove the battery,
charge it and store it in a cool (but frost-
free) room. After a period not exceeding
6 months and before reinstalling the
battery, have it recharged. If it is not re-
charged, it will not be serviceable. Ev-
ery time the battery is discharged, es-
pecially over extended periods, its
service life is reduced.
Avoid environmental pollution
when disposing of old batteries.<
Return used batteries to a recy-
cling point or to your authorized
BMW center. Maintain the battery in an
upright position for transport and stor-
age. Secure the battery against tilting in
transit.<
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 that will damage the vehicle's on-
board 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 per-
formed by specially-trained personnel.<
BMW 750iL: Please contact your autho-
rized BMW center for additional infor-
mation.
BMW 740i/L: When removing the bat-
tery, disconnect the negative terminal
first, then the positive terminal.
Unscrew the battery retaining clamp
(arrow).
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. If the
battery is not mounted properly, it will
not be adequately secured in case of an
accident.< 380de653

Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
183n
RepairsIndexOverview Controls Car care Technology Data
Airbags184
Adaptive Transmission Control
(ATC ) 184
Automatic Stability Control plus
Traction (ASC+T)/Dynamic Sta-
bility Control (DSC) 185
Radio reception186
BMW Active Seat 186
Safety belt tensioner187
DSP sound system 187
Rearview mirror with automatic
dimmer188
Tire Pressure Control (RDC ) 189
Xenon lamps 190
Water and dirt repelling
windshield 191

189n
RepairsIndexOverview Controls Car care Technology Data
Tire Pressure Control (RDC)
*
The Tire Pressure Control system as-
sumes the task of regular tire pressure
checks for you. Tire pressures are mon-
itored at all four wheels, even when the
vehicle is moving.
Behind the valve stem in every wheel,
there is an electronic chip which is de-
signed for severe-duty applications and
long service life. It contains a pressure
sensor, a transmitter and a battery. The
pressure is measured in extremely short
time intervals and then transmitted by a
radio signal. If an irregularity is de-
tected, the transmission rate is in-
creased.380de673
Near every wheel, there are antennas in
the body which receive the signals from
all four wheels. A central electronics
system evaluates the quadruple signals
which it receives and forwards any
changes.
The RDC provides an important contri-
bution to driving safety.

Overview
Controls and features
Operation, care
and maintenance
Technical data
Index Advanced technology
193n
RepairsIndexOverview Controls Car care Technology Data
Owner service procedures
Engine specifications194
Dimensions195
Weights196
Capacities197
Electrical system198
Drive belts198

Initial overview
Controls and features Operation, care
and maintenance
Owner service procedures
Technical dataIndex
Advanced technology
201
n
Repairs
Index
Overview
Controls
Car care
Technology
Data
Everything from A to Z 202
Owner service procedures from A to Z 207

RepairsIndexOverview Controls Car care Technology Data
Everything from A to Z
205n
Oil consumption143
Oil level check143
Oil pressure,
indicator lamp20
Oil specifications144
Oil, Engine oil
Capacities197
OILSERVICE74
Onboard computer84
Onboard tool kit162
Opening the luggage
compartment from the
inside38
Outside mirrors50
Outside temperature
display72
PPaint blemishes,
exterior dirt152
Park Distance Control
(PDC)90
Parking aid90
Parking brake61
Parking in winter130
PDC (Park Distance
Control)90
Playing cassettes
Refer to the
Radio Owner's ManuelPlaying CDs
Refer to the
Radio Owner's Manuel
Pocket light111
Power seat adjustment46
Power steering130
Power steering fluid148
Power windows42
Pressure, tires26,132
Pushbutton for central
locking system36
RRadio
Car radio
Refer to the separate
Owner's Manuel
Radio reception131,186
Radio remote control33
Radio remote control,
battery change168
Radio remote control,
new transmitter168
Rain sensor68,150
RDC (Tire Pressure
Control)94
Reading lamps98
Rear passenger-area air
conditioning105
Rear seat adjustment,
electric48
Rear seat heating106Rear window blind107
Rear window defroster70
Rear-seat control
Front passenger's seat 112
Onboard computer112
Radio112
Rear window blind112
Telephone112
Rearview mirrors50
Refueling25
Remote control for onboard
computer89
Removing condensation,
windows102
Replacement keys30
Replacing tires133
Residual heat104
Roof luggage rack118
Roof weight rating196
Rubber seals and
components154
SSafety belt tensioner187
Safety belts54
Safety lock buttons36
Screw-on valve stem
caps134
Seat adjustment46
Seat heating106
Seat memory51
Seat, power46Securing cargo118
Selector lever, automatic
transmission62,65
Service and Warranty
Information Booklet149
Service Interval Display
74,149
Servotronic130
Shoulder support47
Shutting off the engine60
Ski bag116
Skid control130
Sliding/Tilt sunroof44
Sliding/Tilt sunroof with glass
moonroof45
Sliding/Tilt sunroof, closing
after electrical fault178
Sliding/Tilt sunroof,
convenience operating
mode32
Sliding/Tilt sunroof, radio
remote control33
Slippery roads129
Snow chains129,135
Socket115
Spare key30
Spare tire171
Spark plugs198
Speaker113
Special oils144
Speed limit warning87
Speedometer19

Repairs
Index
Overview
Controls
Car care
Technology
Data
Owner service procedures from A to Z207 n
A
Adding brake fluid 147
Adding engine coolant 146
Adding engine oil 143
Adding fluid, power steering 148
Air pressure 26
B
Backup lamps, bulb
replacement 166
Battery change, radio remote control 168
Battery, checking charge condition 174
Battery, discharged 179
Brake lamps, bulb replacement 166
Brakes, brake faults 128
Bulb replacement 163
C
Changing a wheel 170
Charging the battery 174
Check Control 75
Checking the engine oil 143
Checking tire pressure 26
D
Defrosting, windows102
Difficult steering 130
Doors, manual operation 32
E
Electrical accessories,
failure 176
Electrical fault fuel filler door 178
Sliding/Tilt sunroof 178
Emergency release Doors 32
Fuel filler door 178
Luggage compartment
lid 37
Sliding/Tilt sunroof 178
Engine oil specifications 144
F
Failure messages75
Filling the windshield washer fluid reservoir 142
First-aid kit 24
Fittings, tow-starting and towing 180
Fog lamp,
replace the bulb 165
Footwell lamps, bulb replacement 167 Fuel filler door,
manual release after
electrical fault 178
Fuses, replacing 176
G
Glove compartment lamp,
bulb replacement 167
H
Hazard warning flashers 24
Hazard warning triangle 24
High beam headlamps, bulb replacement 164,165
Hood release 137
I
Indicator lamps 20
Interior lamps, bulb replacement 167
Interior motion sensor, deactivation 41
J
Jump starting 179
L
License plate lamps, bulb
replacement 166
Low beam headlamps, bulb
replacement 164 Luggage compartment
lamps, bulb
replacement 167
Luggage compartment lid, emergency release 37
M
Maintenance74,149
Malfunction displays 75
N
New transmitter, radio re-
mote control 168
O
Oil level check 143
Oil specifications 144
Onboard tool kit 162
P
Power steering,
adding fluid 148
Pressure, tires 26
R
Radio remote control,
battery change 168
Radio remote control, new transmitter 168
Rear lamp assembly 166
Removing condensation, windows 102