2005 BMW 645CI CONVERTIBLE engine oil

Notes
6
For your own safety
Maintenance and repair
Advanced technology, e. g. the use of
modern materials and high-performance
electronics, requires specially adapted mainte-
nance and repair methods. Therefore, have cor-
responding work on your BMW carried out only
by a BMW center or a workshop that works
according to BMW repair procedures with cor-
respondingly trained personnel. If work is car-
ried out improperly there is a danger of conse-
quential damage and the related safety risks.<
California Proposition 65 Warning
California law requires us to issue the following
warning:
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the interior fur-
nishings in a vehicle, contain or emit chemicals
known to the State of California to cause cancer
and birth defects and reproductive harm. In
addition, certain fluids contained in vehicles and
certain products of component wear contain or
emit chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
Battery posts, terminals and related accesso-
ries contain lead and lead compounds. Wash
your hands after handling.
Used engine oil contains chemicals that have
caused cancer in laboratory animals. Always
protect your skin by washing thoroughly with
soap and water.<
Parts and accessories
For your own safety, use genuine parts
and accessories approved by BMW.
When you purchase accessories tested and
approved by BMW and Genuine BMW Parts,
you simultaneously acquire the assurance that
they have been thoroughly tested by BMW to
ensure optimum performance when installed
on your vehicle.
BMW warrants these parts to be free from
defects in material and workmanship.
BMW will not accept any liability for damage
resulting from installation of parts and accesso-
ries not approved by BMW.
BMW cannot test every product made by other
manufacturers to verify if it can be used on a
BMW safely and without risk to either the vehi-
cle, its operation, or its occupants.
Genuine BMW Parts, BMW Accessories and
other products approved by BMW, together
with professional advice on using these items,
are available from all BMW centers.
Installation and operation of non-BMW
approved accessories such as alarms, radios,
amplifiers, radar detectors, wheels, suspension
components, brake dust shields, telephones,
including operation of any mobile phone from
within the vehicle without using an externally
mounted antenna, or transceiver equipment, for
instance, CBs, walkie-talkies, ham radios or
similar accessories, may cause extensive dam-
age to the vehicle, compromise its safety, inter-
fere with the vehicle's electrical system or affect
the validity of the BMW Limited Warranty. Refer
to your BMW center for additional informa-
tion.<
Maintenance, replacement, or repair of
the emission control devices and sys-
tems may be performed by any automotive
repair establishment or individual using any cer-
tified automotive part.<

Cockpit
12
Instrument cluster
1Indicator lamps for turn signals13
2Speedometer
3Indicator and warning lamps13
4Display for active cruise control
*64
5Tachometer69
and Engine oil thermometer70
6Display for
>Time/date69
>Outside temperature69
>Indicator and warning lamps71
>Speed for cruise control62
>Desired speed for active cruise
control
*647Display for
>Odometer and trip odometer69
>Computer74
>Date and remaining distance to be
driven for service requirement70
>Automatic transmission
with Steptronic
*58
>SMG Sequential manual
transmission
*57
>Dynamic Driving Control59
> Check Control message present71
8Fuel gage70
9Resetting the trip odometer to zero69

Everything under control
70
Engine oil thermometer
The engine oil temperature is between approx.
1607/706 and approx. 3407/1706 during
normal operation.
If the engine oil temperature is too high, a mes-
sage appears on the Control Display.
Fuel gage
Fuel tank capacity: approx. 18.5 US gallons/
70 liters, including the reserve capacity of
approx. 2.1 gallons/8 liters. You can find infor-
mation on refueling on page166.
If the tilt of the vehicle varies for a longer period,
when you are driving in mountainous areas, for
example, the indicator may fluctuate slightly.
After the reserve quantity has been reached, a
message appears for a short time on the Con-
trol Display; the remaining range is shown in the
computer. Below a range of approx. 30 miles/
50 km, the message remains on the Control
Display.
Refuel as soon as possible once your
cruising range falls below 30 miles/
50 km, as otherwise engine functions are not
ensured and damage can occur.<
Service requirements
The remaining distance to be driven and the
date for the next maintenance are briefly indi-
cated with the ignition key in position 2.
Your BMW Service Advisor will determine
your vehicle's current service require-
ments by reading out the data stored in the
master key.<
Additional information
You can view additional information on service
and maintenance procedures on the Control
Display.
Control Center, for principle details, refer to
page16.
1.Open the menu.
2.Select "Service" and press the controller.
3.Select "Service requirements" and press
the controller.
4.Select "Status" and press the controller.
The display shows a list of selected service and
maintenance procedures, as well as legally
mandated official inspections.

Controls
83Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
To control
The indicator lamp flashes:
DSC or DTC controls the drive forces
and brake forces.
The indicator lamp comes on:
DSC and DTC are deactivated together via the
button DTC.
The indicator lamp comes on: DTC is
activated via the DTC button.
Malfunction in the driving-stability
control systems
The brake system warning lamp lights
up in red, appearing together with the
indicator lamps for ABS and DSC. A
message appears on the Control Dis-
play. The driving-stability control sys-
tems have failed. Conventional braking
efficiency remains available without
limitations.
While you may continue, you should remember
to proceed cautiously and drive defensively
while avoiding full brake applications.
Have the system checked as soon as possible.
Display of the previously described
malfunction on Canadian models.
The DSC indicator lamp lights up. A
message appears on the Control Dis-
play. A malfunction has occurred in
DSC and DTC.
The stability maintenance functions are no
longer available. The vehicle remains opera-
tional.
Have the system checked as soon as possible.
The warning lamp for the brake system
lights up in yellow. A message appears
on the Control Display. DBC has failed.
Have the system checked as soon as possible.Display of the previously described
malfunction on Canadian models.
Active roll stabilization*
The concept
Active roll stabilization minimizes body roll and
optimizes vehicle stability during cornering and
evasive maneuvers.
Dynamic stabilizers at the front and rear axles
form the basis for active roll stabilization. Sus-
pension compliance adapts to suit driving con-
ditions, varying from performance-oriented
during cornering to smooth and comfort-ori-
ented when the vehicle is proceeding in a
straight line. During vehicle operation, the sys-
tem continuously runs through closed-loop
control cycles lasting only fractions of a second.
The system assumes operational status each
time you start the engine.
Malfunction
The warning lamp lights up and a mes-
sage appears on the Control Display.
There is a malfunction in the system.
Have the system checked as soon as possible.
If there is a malfunction in the system,
please remember to adapt your speed
accordingly, especially in curves.
The suspension will be noticeably softer and
the vehicle will display a greater tendency to tilt
during cornering and in crosswinds.
If a message stating that you should stop
appears on the Control Display, stop and switch
off the engine as soon as possible. In this case
the oil level in the reservoir may have dropped
below the minimum, possibly owing to a leak in
the hydraulic system. Do not continue driving.
Contact your BMW center.<

Mobility
175Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Engine compartment
1Filler neck for engine oil, refer to Topping off
engine oil
2Brake fluid reservoir, located beneath the
microfilter cover, refer to page177
3Dipstick for engine oil, refer to Checking oil
level
4Starting-aid terminal, refer to page186
5Washer fluid reservoir of the headlamp and
windshield cleaning systems, refer to
page61
6Expansion tank for coolant, refer to
page176
Engine oil
The engine oil consumption is dependent on
driving style and driving conditions.
Checking oil level
1.Park the vehicle on a level surface with the
engine warm, i.e. after an uninterrupted
drive of at least 6 miles/10 km.
2.Switch off the engine.3.After approx. 5 minutes, pull the dipstick3
out and wipe it off with a clean lint-free
cloth, paper towel, or similar material.
4.Carefully push the dipstick all the way into
the guide tube and pull it out again.
The oil should extend to between the two
marks on the dipstick.
The oil quantity between the centers of the two
marks on the dipstick, refer to arrows, is approx.
1.6 US quarts/1.5 liters.
Do not fill beyond the upper mark on the
dipstick. Excess oil can damage the
engine.<

Under the hood
176
Topping off engine oil
Wait until the level has dropped to just above
the lower dipstick mark before adding oil. When
it falls to this level, a message also appears on
the Control Display.
Refill the oil within the next 125 miles/
200 km, otherwise engine damage could
result.<
Store oil, grease etc., well out of the reach
of children; always observe all warning
labels on the containers.<
Oil change
Have oil changes carried out only by a BMW
center.
Specified engine oils
The quality of the engine oil selected has critical
significance for the operation and service life of
an engine. BMW continuously approves spe-
cific oils after confirming their suitability for use
in its vehicles with extensive testing.
Use only approved BMW High Performance
Synthetic Oil.
If you are unable to obtain BMW High Perfor-
mance Synthetic Oil, you can add small
amounts of another synthetic oil between oil
changes. Use only oils with the API SH specifi-
cation or higher.
Ask your BMW center for details concern-
ing the specific BMW High Performance
Synthetic Oil or synthetic oils which have been
approved.<
You can also call BMW of North America at
1-800-831-1117 or visit this website:
www.bmwusa.com to obtain this information.BMW engines are designed to operate
without additives, and their use could
even lead to damage in some cases.<
Viscosity ratings
Viscosity is the oil flow rating as defined in SAE
classes.
The selection of the correct SAE class depends
on the climatic conditions in the area where you
typically drive your BMW.
Approved oils are in SAE classes 5W-40
and 5W-30.<
These oils may be used for driving in all ambient
temperatures.
Coolant
Do not open the cooling system when the
engine is hot. Escaping coolant can cause
burns.<
Coolant consists of water and coolant additive.
Not all commercially available additives are suit-
able for your BMW. Ask your BMW center for
suitable additives.
Only use suitable additives, as otherwise
engine damage may result. The additives
present a health hazard.<
Always observe all applicable environ-
mental laws and regulations when dis-
posing of used coolant additives.<
Checking coolant level
1.The engine must be at ambient tempera-
ture.

Maintenance
178
Maintenance
The BMW Maintenance
System
The BMW maintenance system supports the
preservation of the traffic and operating safety
of your BMW. The service schedule also
includes operations related to the vehicle's
comfort and convenience features, such as
replacement of the filters for the inside air. The
ultimate objective is to ensure economical
maintenance by providing the ideal service for
your 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. Condition Based Service uses this to
determine the current and future service
requirements. By letting you define a service
and maintenance regimen that reflects your
own individual requirements, the system builds
the basis for trouble-free driving.
You can set the Control Display to show
remaining times or distances of selected main-
tenance intervals and legally mandated dead-
lines, refer to page70:
>Engine oil
>Brakes, front and rear separately
>Microfilter/activated-charcoal filter
>Brake fluid>Spark plugs
>Vehicle check
>Legally required tests depending on local
regulations
Your vehicle stores this information continu-
ously in the master key while the vehicle is
being driven. After accessing the data stored in
the master key, your BMW Service Advisor can
suggest precisely the right array of service pro-
cedures for your own individual vehicle. You
should therefore give your BMW Service Advi-
sor the key you last used to drive when you take
your vehicle in for service.
Make sure the date in the Control Center
is always set correctly, refer to page78,
as otherwise the effectiveness of CBS Condi-
tion Based Service is not ensured.<
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 regarding service
requirements.
Have service and repair operations per-
formed 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, and may also be
required when submitting warranty claims.<

Reference 195
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Capacities
Notes
Fuel tank
Reservegal/liters
gal/litersapprox. 18.5/70
approx. 2.1/8Fuel specification: page167
Window and headlamp washer
system quarts/liters approx. 5.3/5For details: page61
Engine oil and filter change quarts/liters 8.5/8 BMW High Performance
Synthetic Oil
Oil grades: page176