2008 BMW 750I Page 75

Under the hood
208
Engine compartment
1Wiper fluid filler neck66
2Engine oil filler neck, refer to Adding engine
oil3Body ground, negative terminal220
4Coolant expansion tank210
5Jump starting terminal220
Engine oil
The engine oil consumption depends on driving
style and driving conditions.
Checking oil level
Your vehicle is equipped with an electronic oil
level control.
To obtain the most accurate possible oil level
reading, the measurement should be taken
when the engine is at operating temperature,
i.e. following an uninterrupted drive of at least
6 miles/10 km. You can display the oil level
while driving or when stopped on a level surface
with the engine running.
The current oil level can be viewed on the Con-
trol Display.
iDrive, for principle details, refer to page16.1.Press the button to open the start
menu.
2.Move the controller toward "Car Data".
3.Select and press the controller.
The oil level is displayed.
Turn the controller to exit the list.

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211Reference
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Maintenance
BMW Maintenance System
The BMW Maintenance System serves to
retain the operating and road safety of your
BMW. The service schedule also includes oper-
ations related to the vehicle's comfort and con-
venience features, such as replacement of the
filters for the inside air. The aim is to optimize
maintenance procedures with a view to reduc-
ing the cost of running the vehicle.
Should the day come when you decide to sell
your BMW, you will find that a complete dealer
service history is an asset of inestimable value.
CBS Condition Based Service
Sensors and special algorithms take the differ-
ent driving conditions of your BMW into
account. As a result, Condition Based Service
determines the current and future maintenance
requirements. By letting you define a service
and maintenance regimen that reflects your
own individual requirements, the system forms
the basis for trouble-free driving.
On the Control Display, you can have the
remaining times and distances for selected
maintenance procedures and any legally man-
dated deadlines displayed, refer to page78:
>Engine oil
>Brakes, separate for front and rear
>Microfilter
>Brake fluid
>Spark plugs>Vehicle check
>Legally prescribed inspections depending
on national regulations
Service data in the remote control
Your vehicle continuously stores service-
requirement information in the remote control
while you are driving. After accessing the data
stored in the vehicle key, your BMW Service
Advisor can suggest precisely the right array of
service procedures for your own individual vehi-
cle. This is why it is important when you take
your vehicle in for service to give the BMW Ser-
vice Advisor the last remote control you used
for driving.
Storage periods with the battery discon-
nected are not taken into account by the
CBS maintenance system. If this occurs, have a
BMW center update the time-dependent main-
tenance procedures, such as checking brake
fluid and if necessary engine oil and the micro/
activated charcoal filter.<
Service and Warranty Information
Booklet for US models and
Warranty and Service Guide Booklet
for Canadian models
Please consult your Service and Warranty Infor-
mation Booklet for US models and Warranty
and Service Guide Booklet for Canadian models
for additional information on service require-
ments.
BMW recommends that you have service
and repair operations performed at your
BMW center.
Take the time to ensure that these service pro-
cedures are confirmed by entries in your vehi-
cle's Service and Warranty Information Booklet
for US models and Warranty and Service Guide
Booklet for Canadian models. These entries
verify that your vehicle has received the speci-
fied regular maintenance.<

Mobility
213Reference
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Replacing components
Onboard tool kit
The onboard toolkit is located in the luggage
compartment lid.
Loosen the wingnut to open.
The adapter for the spare key can be stored
beneath the open-ended wrenches.
Windshield wiper blades
To replace the blades, start by folding the wip-
ers out and away from the windshield, refer to
page66.
Lamps and bulbs
Lamps and lights contribute significantly to
road safety. Therefore, comply fully with the fol-
lowing instructions during bulb replacement.
BMW recommends that you entrust corre-
sponding procedures to your BMW center if
you are unfamiliar with them or they are not
described here.
Never touch the glass of new bulbs with
your bare fingers, as even minute traces
of contamination will burn into the bulb's sur-
face and reduce its service life. Use a clean
cloth, napkin, etc., or hold the bulb by its metal
socket.<
You can obtain a selection of replacement bulbs
at your BMW center.When working on the lighting system, you
should always switch off the lights
affected to prevent short circuits.
To avoid possible injury or equipment damage
when replacing bulbs, follow any instructions
provided by the bulb manufacturer.<
When maintaining the headlamps, please follow
the instructions in the separate Caring for your
vehicle brochure.
Light-emitting diodes LEDs
Light-emitting diodes installed behind translu-
cent lenses serve as the light source for many of
the controls and displays in your vehicle. These
light-emitting diodes, which operate using a
concept similar to that applied in conventional
lasers, are officially designated as Class 1 light-
emitting diodes.
Do not remove the covers, and never
stare into the unfiltered light for several
hours, as irritation of the retina could result.<
Xenon lamp*
The service life of these bulbs is very long and
the probability of a failure is very low, provided
that they are not switched on and off an unusual
number of times. In the unlikely event that one
of these lamps should fail, you can respond by
switching on your fog lamps and proceeding
carefully, where allowed by law.
Only have work on the xenon lighting sys-
tem including bulb changes carried out by
a BMW center or a repair shop that works in
accordance with BMW guidelines and uses
appropriately trained personnel. Due to the high
voltage involved, there is a danger to life and
limb when work is carried out improperly.<
For checking and adjusting headlamp
aim, please contact your BMW center.<

Replacing components
216 >Wheel chock
Located next to the spare wheel, or behind
the trim panel on the left side of the luggage
compartment on vehicles equipped with a
trailer coupling.
Remove the floor mat and the cover above
the spare tire.
Unscrew the wingnut and remove the wheel
chock.
>Vehicle jack
Located in the luggage compartment
behind the right-hand side panel.
Grasp the handle in the upper panel and fold
it down.
Loosen the wingnut and remove the jack.
After use, screw the jack all the way back
down and snap the handle back into place.
Spare tire
1.Loosen the wing nut 1.
2.Remove the washer 2 from the side.
3.Completely unscrew the threaded rod 3.
4.Remove the spare tire.
Preparing for a wheel change
1.Read carefully and comply with the safety
precautions on page215.
2.Secure the vehicle to prevent it from rolling:
Place the wheel chock against the rear sur-
face of the front tire on the side opposite the
side being raised. If the vehicle is parked on
a downward slope, place the wheel chock
securely in front of the tire. On a steep
grade, take additional precautions to secure
the vehicle against rolling.
3.Loosen the lug bolts a half turn.
Lifting vehicle
1.Position the jack at the jacking point closest
to the wheel so that the entire jack base
makes contact vertically under the jacking
point.
The vehicle jack is designed for
changing wheels only. Do not attempt
to raise another vehicle model with it or to
raise any load of any kind. To do so could
cause accidents and personal injury.<

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2.Guide the jack head into the rectangular
recess of the jacking point when cranking
up the jack, refer to section of illustration.
3.Jack the vehicle up until the wheel you are
changing is raised from the ground.
Mounting a wheel
1.Unscrew the lug bolts and remove the
wheel.
2.Remove accumulations of mud or dirt from
the mounting surfaces of the wheel and
hub. Clean the lug bolts.
3.Position the new wheel or spare tire on the
hub and screw in at least two bolts diago-
nally.
When you mount wheels other than Genu-
ine BMW light-alloy wheels, different lug
bolts may also be required.
4.Screw in the remaining lug bolts. Tighten all
the bolts securely in a diagonal pattern.
5.Lower the vehicle and remove the jack from
beneath the vehicle.
After mounting
1.Tighten the lug bolts in a diagonal pattern.
To ensure safety, always have the
lug bolts checked with a calibrated
torque wrench as soon as possible to
ensure that they are tightened to the speci-
fied torque. The tightening torque is
100lbft/140Nm.<
2.Reverse the removal sequence when stor-
ing the wheel and tools in the vehicle.3.Check and correct the tire inflation pressure
at the earliest opportunity.
Use valve stem seal caps to protect
valve stems from dirt and contamina-
tion. Dirt in valve stems is a frequent source
of gradual air loss.<
4.Reinitialize the Flat Tire Monitor, refer to
page90, or reset the Tire Pressure Monitor,
refer to page92.
5.Replace the damaged tire as soon as possi-
ble and have the new wheel/tire balanced.
Driving with spare tire
On certain wheel-tire combinations, the
size of the spare tire differs from that of
the rest of the tires. The spare tire is fully capa-
ble of running in all load and speed ranges.
However, to recreate the original conditions,
the tire should be replaced as soon as possi-
ble.<
Vehicle battery
Maintenance
The battery is 100 % maintenance-free, i.e., the
electrolyte will last for the life of the battery
when the vehicle is operated in a temperate cli-
mate. Your BMW center will be happy to advise
you on all questions concerning the battery.
Charging battery
Charge the battery in the vehicle only via the
terminals in the engine compartment and with
the engine off. Connections, refer to Jump
starting on page220.

Replacing components
218
Battery switch
Before storing the vehicle for an extended
period of several weeks or more, slide the bat-
tery switch located behind the trim panel on the
right side of the luggage compartment to OFF.
This reduces the current flow from the battery
for the period during which the vehicle remains
parked. A message appears on the Info Display.
Please take note of the supplementary informa-
tion provided on the Control Display.
Disposal
Have old batteries disposed of following
replacement at your BMW center or bring
them to a collection point. Maintain the battery
in an upright position for transport and storage.
Always secure the battery to prevent it from tip-
ping over during transport.<
Power failure
After a temporary interruption in electrical
power, the functioning of some equipment may
be limited and must be reinitialized. Individual
settings are also lost and must be updated
again:
>Seat, mirror, and steering wheel memory
The positions must be stored again, refer to
page46.
>Time and date
These must be reset, refer to page84.
>Radio
Stations must be stored again, refer to
page158.
>Navigation system
You must wait until it becomes operational
again, refer to Inserting navigation CDs/
DVDs on page130.
Fuses
Never attempt to repair a blown fuse, and
do not replace a defective fuse with a sub-
stitute of another color or amperage rating, as
this could lead to a circuit overload, ultimately
resulting in a fire in the vehicle.<
Spare fuses and plastic tweezers are stored in
the fuse box in the luggage compartment.
In glove compartment
Press the tab on the cover to the front, then fold
down the cover.
Additional information about fuse allocations is
provided on the fuse card in the compartment.
In the luggage compartment
Pull the handle to fold down the trim on the right
wall.
Additional information about fuse allocations is
provided on the side panel.

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Giving and receiving assistance
Emergency call*
Conditions for an emergency call:
>Full preparation package mobile phone.
This equipment package makes it possible
to initiate an emergency call even if no
mobile phone is paired with the vehicle.
>BMW Assist is activated. BMW Assist acti-
vation, refer to page193.
>Radio ready state or ignition must be
switched on.
>The BMW Assist system is logged on to a
mobile phone network.
>The emergency call system is operable.
Once your service contract for BMW Assist
expires, the BMW Assist system can be deacti-
vated by a BMW center without you having to
visit a workshop. Once the BMW Assist system
has been deactivated, emergency calls are not
possible. The BMW Assist system can be reac-
tivated by a BMW center after a new contract
has been signed.
Initiating an emergency call
1.To open the protective cover:
Briefly press the protective cover.
2.Press the emergency call button for at least
2seconds.
The LED in the button lights up. As soon as the
voice connection to the BMW Assist response
center has been established, the LED flashes.Once the BMW Assist Response Center has
received your emergency call, the BMW Assist
Response Center contacts you and takes fur-
ther steps to help you.
If circumstances permit, remain in the vehicle
until the voice connection has been estab-
lished. You will then be able to provide a
detailed description of the situation.
If the current location of your vehicle can be
determined, it will be transmitted to the
BMW Assist Response Center.
If the LED is flashing but you cannot hear the
BMW Assist Response Center over the hands-
free system, then the hands-free system may
be malfunctioning. You may, however, still be
audible to the BMW Assist Response Center.
Under certain conditions, an emergency call is
initiated automatically immediately after a
severe accident. An automatic emergency call
is not affected by the emergency call button
being pressed.
For technical reasons, the emergency call
cannot be guaranteed under unfavorable
conditions.<
In order to transmit the vehicle location, a
navigation CD/DVD must be inserted and
the system must be currently receiving a GPS
signal.
If the navigation system is inoperative, the cur-
rent position of the vehicle is not transmitted.<
Roadside Assistance*
The BMW Group's Roadside Assistance ser-
vice is there to assist you around the clock in
the event of a breakdown, including on week-
ends and public holidays.
The phone numbers of the Roadside Assis-
tance Center in your home country can be
found in the Contact brochure.

Giving and receiving assistance
220 Select "BMW Assist" if you have applied for this
information service, refer to Roadside Assis-
tance on page190.
Warning triangle*
The warning triangle is conveniently stored in
the onboard tool kit mounted on the inside of
the luggage compartment lid.
First-aid kit*
The first-aid kit is also located in the container
of the onboard tool kit.
Some of the articles contained in the first-aid kit
have a limited service life. Check the expiration
dates of the contents regularly and replace the
contents concerned in a timely fashion as
needed.
Jump starting
When your battery is discharged, you can use
two jumper cables to start your vehicle with
power from the battery in a second vehicle. You
can also use the same method to help start
another vehicle. Use only jumper cables with
fully-insulated terminal clamps.
To avoid the risk of potentially fatal injury,
always avoid all contact with electrical
components while the engine is running. Care-
fully adhere to the following sequence, both to
prevent damage to one or both vehicles, and to
guard against possible personal injury.<
Preparing
1.Check whether the battery of the other
vehicle has a voltage of 12 Volts and
approximately the same capacitance in Ah.
This information is listed on the battery.
2.Switch off the engine of the assisting vehi-
cle.
3.Switch off any electrical systems and com-
ponents in both vehicles.
Make sure that there is no contact
between the bodywork of the two vehi-
cles; otherwise, there is a danger of short cir-
cuits.<
Connecting jumper cables
To avoid personal injury from sparks, fol-
low this sequence when connecting jum-
per cables.<
In your BMW, the so-called jump starting termi-
nal in the engine compartment functions as the
positive battery terminal. The symbol + is
embossed on the cover.
1.Remove the cover of the BMW jump start-
ing terminal, refer to arrow1.
2.Attach one terminal clamp of the plus/+
jumper cable to the positive terminal of the
battery or a jump starting terminal of the
vehicle providing assistance.
3.Attach the second positive/+ clamp of the
jumper cable to the positive battery terminal
or to a jump starting terminal on the vehicle
to be started.
4.Attach one negative/– clamp of the jumper
cable to the negative battery terminal or to
an engine or body ground of the assisting
vehicle.