battery BMW 740I 1998 User Guide

107n
RepairsIndexOverview Controls Car care Technology Data
Roller sun blind
*
Independent ventilation system
To actuate, press the button briefly after
ignition key position 1.Roller sun blinds for the rear side
windows
*
Use the strap to extract the blinds, then
suspend them in the attachment pro-
vided.380de624
This system uses the automatic climate
control system blower to ventilate the
passenger compartment and reduce in-
terior temperatures while the vehicle is
parked.
The independent ventilation system is
operated via the Multi-Information Dis-
play (MID) or the onboard computer.
Refer to the separate Owner's Manual.
You can preselect the activation time
for a 30-minute ventilation cycle, or you
can switch the system on and off manu-
ally with the ignition key at position 1.
Since the system uses a substantial
amount of electrical current, you should
refrain from activating it twice in suc-
cession without allowing the battery to
be recharged in normal operation be-
tween use.
When a preselected activation time is
set, the independent ventilation system
is operational at outside temperatures
above 607 (166), or by direct switch
activation. It cannot be switched on
when the vehicle is moving.
The air emerges via the vent outlets for
the upper body. Therefore, the vents
must be open for the system to operate.

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RepairsIndexOverview Controls Car care Technology Data
HoodTo unlock the hoodPull the lever located at the lower 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 be-
fore working in the engine compart-
ment.
Always disconnect the battery before
working on any electrical systems or
equipment. Comply with all applicable
instructions and warnings. Failure to
work in an informed, professional man-
ner 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 operations
performed by your authorized BMW
center.< 380de071
To openPull the release handle and open the
hood.380de635
To closePress down lightly on the hood at the
locations shown in the illustration (ar-
rows) or drop it from approx. 4 inches
(10 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.< 380de634

Overview
Controls and features
Operation, care
and maintenance
Owner service procedures
Technical data
Index Advanced technology
161n
RepairsIndexOverview Controls Car care Technology Data
Replacement procedures:
Onboard tool kit162
Windshield wiper blades162
Lamps and bulbs163
Remote control168
Changing tires170
Battery173
Fuses176
In case of electrical
malfunction:
Fuel filler door178
Sliding/Tilt sunroof178
Assistance, giving and
receiving:
Jump-starting179
Towing the vehicle180

163n
RepairsIndexOverview Controls Car care Technology Data
Lamps and bulbsThe lamps and bulbs make essential
contributions to the safety of your vehi-
cle. Observe the following instructions
during bulb replacement carefully. If
you are not familiar with any of the pro-
cedures, 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 in to the surface, thus reducing 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 left-hand side
of the engine compartment.Release the lamp cover.1 Low beam headlamps
Press the tabs together (arrows).
2 Highbeams/side lamps and parking
lamps
Insert the screwdriver (from the on-
board tool kit) and press in the direction
of the arrow.380de656

168n
Remote controlChanging batteryReplace the battery when the message
"REMOTE KEY BATTERY" appears in
the Check Control. The LED no longer
lights up when a button is pressed and
it is no longer possible to lock the car
using the remote key.
Install only a battery of the type that is
specified in the battery compartment
(CR 2016). Be sure the battery is in-
stalled in the correct position.
1 Use a screwdriver to lift the cover at
the recess (arrow)365de017
2 Loosen the two screws (arrows) and
remove the cover.
The battery type and its installation po-
sition are stamped into the base of the
battery compartment.
Return used batteries to a recy-
cling point or to your authorized
BMW center.< 365de018
New transmitterIf you place a new transmitter into ser-
vice (either a replacement or an addi-
tional transmitter), it must be initialized:
1 Enter the vehicle and close the
driver's door
2 Briefly (max. 5 seconds) turn the
ignition key to position 1 in the steer-
ing lock, then return it to position 0
3 Remove key; press and hold down
button 1 (see illustration). Maintain
pressure on button 1 while rapidly
pressing button 2 three times in suc-
cession within a period of 10 seconds380us014

170n
Changing tires
Safety measures in the event of a
flat tire or wheel change:
Stop the vehicle as far as possible from
passing traffic. Park on a firm, flat, sur-
face.
Switch on the hazard flashers.
Turn the steering wheel to the straight-
ahead position, remove the key and en-
gage the steering lock. Make sure that
the selector lever is in Park, and engage
the parking brake.
All passengers should be outside the
car and well away from your immediate
working area (for instance, behind a
guardrail).
If a warning triangle or portable hazard
warning lamp is available, set it up on
the roadside at an appropriate distance
from the rear of the vehicle.
Comply with all safety guidelines and
regulations.
Change the wheel only on a level, firm
surface which is not slippery. Avoid
jacking the car on a soft or slippery sup-
port surface (snow, ice, loose gravel,
etc.), since it could slide sideways.
Position the jack on a firm support sur-
face.
Do not place wooden blocks or similar
objects under the jack. If this is done,
the jack might not be able to reach its
full support capacity because of the
limited height. Do not lie under the vehi-
cle or start the engine when the vehicle
is supported by the jack - risk of fatal
injury.<
What you will needIn order to avoid rattling noises later,
note the position of the tools when you
remove them and return them to their
original position when you are through
using them.
>Car jack
Fold the right-hand trim panel of the
luggage compartment down using
the handle at the top.
Loosen the wing nut (arrow 1).
When you have completed work,
screw the jack all the way back down.
Fold the handle back and insert it in
its holder.
>Wedge (wheel chock)
Next to the battery, under the jack.
Remove the jack and loosen the wing
nut (arrow 2).380de639

173n
RepairsIndexOverview Controls Car care Technology Data
BatteryInstallation location, BMW 740i/LThe battery is located behind the right-
side trim panel in the luggage compart-
ment.
Grasp the handle in the upper panel
and fold it down.380de671
Installation location, BMW 750iLTwo batteries are installed in the BMW
750iL. They are located in the luggage
compartment behind the right side trim
panel.
To check the charge condition or
for removal or installation, please
consult your BMW center.< 380de654
SymbolsYou will find the following symbols on
your car battery. To avoid injury, please
observe the corresponding precautions
whenever you work with or near the
battery.
Please read the following infor-
mation before working with the
battery.
Wear eye protection. Do not al-
low particles containing battery
acid or lead to come into con-
tact with your eyes, your skin, or your
clothing.
Battery acid is extremely corro-
sive. Wear eye protection and
protective gloves. Do not tip the
battery. Battery acid can leak from the
ventilation openings.
Be sure that children keep well
away from batteries and battery
acid.
Never allow sparks or open
flame, and do not smoke in the
vicinity of the battery.
Avoid sparks from electrical cables or
electrical equipment. Turn the key to po-
sition 0 in the steering lock when the
battery is disconnected or connected.

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

176n
FusesIf an electrical accessory should fail,
switch it off and check the fuse.In the engine compartment1 Open the hood. Press the cover fas-
teners (arrows) forward and open the
cover
2 Use the plastic tweezers (located on
the inside of the cover) to remove the
fuse for the accessory or equipment
that has stopped working from its
socket
3 If the fuse is burned through (the
metal strip is melted and separated),
replace it with a new fuse of the same
ampere rating (color code).380de085
A list of the fuses, their respective am-
pere ratings and the equipment in their
circuits is provided next to the fuse box.
When you close the fuse box, be sure
that the cover is seated securely.
Additional fuses are provided in the
luggage compartment (refer to next
column).
The fuse for continuous positive current
is located in a separate fuse box above
the battery. If this fuse is defective, refer
the problem to your BMW center for re-
pair.Do not attempt to repair a burned
fuse or replace it with a fuse hav-
ing a different color or amperage rating.
To do this could cause a fire in the vehi-
cle resulting from a circuit overload.<
If the fuse fails repeatedly, refer the
problem to your BMW center for repair.