1998 BMW 740I heater

50n
MirrorsExterior mirrors1 Switch for 4-way adjustment
2 Left/right selection switch.
You can also adjust the mirrors manu-
ally by pressing against the outer edges
of their lenses.
To store the mirror angles: Refer to
"Seat, mirror and steering wheel
memory" on page 51.380us029
The mirror on the passenger's
side features a lens with a more
convex surface than the mirror installed
on the driver's side. When estimating
the distance between yourself and
other traffic, bear in mind that the ob-
jects reflected in the mirror are closer
than they appear. This means that esti-
mations of the distance to following
traffic should not be regarded as pre-
cise.<
You can make the settings of your
vehicle in such a manner that,
when you unlock the car with your per-
sonalized remote control, your own per-
sonalized mirror adjustment is initi-
ated.<
Electric heatersDepending on the outside temperature,
both mirrors are automatically defrosted
when the ignition key is in position 2.
Inside rearview mirror with
automatic dimming featureThis mirror automatically responds to
light (ambient light and headlamp glare)
by dimming through an infinitely vari-
able range.
The mirror automatically reverts to its
clear, undimmed setting whenever you
move the selector lever to Reverse.
To ensure that the mirror continues to
operate properly, keep the two photo-
cells clean and unobstructed. One pho-
tocell is integrated in the mirror glass,
the other somewhat offset on the back
of the mirror.
For an explanation of the electro-chro-
mic technology used in this mirror, refer
to page 188.380us031

103n
RepairsIndexOverview Controls Car care Technology Data
Automatic climate controlAutomatic recirculated-air control
(AUC)
You can respond to unpleasant
external odors by temporarily
stopping the flow of outside air. The
system then recirculates the air cur-
rently within the vehicle. Press the but-
ton repeatedly to run through the fol-
lowing control sequence:
>Indicator lamps off: Fresh air flows
into the vehicle
>Left-hand indicator lamp on – AUC
mode: The system detects pollutants
in the outside air and responds by
deactivating the outside air flow when
required. The system then recircu-
lates the air currently within the vehi-
cle
>Right-hand indicator lamp on: The
flow of external air into the vehicle is
permanently blocked. The system
then recirculates the air currently
within the vehicle.
If you have a multi-function steering
wheel with the AUC button (refer to
page 23), you can also switch between
"OFF" and AUC from there.
If the windows fog over in the re-
circulated-air mode, switch this
mode off and increase the air supply as
required.<
Rear window defroster
When the rear window defroster
is activated, the indicator lamp
comes on. The rear window defroster
switches off automatically.
Temperature
You can make individual
temperature settings on the
driver's side and the front passenger
side. Your settings will be shown in the
display 7. The displayed temperatures
are reference values for the interior
temperature. We recommend 707
(226) as a comfortable setting,
whether the air conditioner is operating
or not. When you start the vehicle, the
system ensures that the selected tem-
perature is achieved as quickly as pos-
sible. It then maintains this tempera-
ture, regardless of the season.
You can set uncontrolled heater
output at up to 907 (326). Full
cooling output is available from the air
conditioner down to 607 (166).<

Air supply
In the "AUTO" program, the
air flow is controlled auto-
matically. AUTO will appear in the dis-
play, refer to the overview on page 100.
Use "+" and "–" to vary the air flow.
When your setting is displayed by bars,
the automatic air flow is switched off.
Automatic air distribution maintains its
setting. You can reactivate the auto-
matic air flow by pressing the "AUTO"
button.
When you press "– " during operation at
minimum blower speed all displays are
canceled: The fan, heating and air con-
ditioner are switched off. The outside
air supply is closed. By pressing any
button of the automatic climate control
(except the "REST" button 9), you can
switch the system back on.

106n
Seat heating
*
Steering wheel heating
*
The seat cushion and backrest can be
heated with ignition key in position 2.
You can call up different heating modes
by repeatedly pressing the keys.
The highest heating mode is on when
the three indicator lamps are lit; one
lamp is lit for lowest heating. Tempera-
ture regulation in each mode is with a
thermostat.
You can also switch the higher heating
modes off directly:
Press the key and hold it slightly longer.380de618
Rear seat heating
*
The switches are located at the rear of
the center console, beneath the air
vents.
To activate and cancel the steering
wheel heater, press button (arrow) with
the ignition key in position 2.
The lamp within the button lights up
when the steering wheel heater is in op-
eration.
If you have a multi-function steering
wheel without steering wheel heating,
the button for the recirculated-air mode
is in this location (refer to page 23).
380de200

197n
RepairsIndexOverview Controls Car care Technology Data
Capacities
Notes
Fuel tank
Reserve gal. (liters)
gal. (liters)approx. 22.5 (approx. 85) – BMW 740i/L
approx. 25.1 (approx. 95) – BMW 750iL
approx. 2.6 (approx. 10.0) – BMW 740i/L
approx. 3.2 (approx. 12.0) – BMW 750iLFuel specification: Refer to
page 25
Windshield washer
incl. headlamp-washing systemquarts (liters)
quarts (liters)approx. 4.7 (approx. 4.5)
approx. 6.5 (approx. 6.0)For details: Refer to page 128
Cooling system including
heater circuitquarts (liters) 13.2 (12.5) – BMW 740i/L
13.7 (13.0) – BMW 750iLFor details: Refer to page 130
Engine oil and filter change quarts (liters) 7.9 (7.5) – BMW 740i/L
8.5 (8.0) – BMW 750iLApproved HD oil for gasoline
engines. Specifications: Refer
to page 144
Automatic transmission – – Lifetime fluid, no fluid change
required
Differential quarts (liters) 1.7 (1.6) Approved hypoid gear oil
(specifications are available
from any BMW center)