2006 BMW Z4 COUPE fuel

Reference
At a glance
Controls
Driving tips
Mobility
47
Reserve
Once the fuel level has fallen to the reserve
zone of approx. 2.1 US gallons/8 liters, indicator
lamp 1 lights up continuously.
Do not drive until the fuel tank is empty
and refill it well in advance. Otherwise the
engine may not operate properly and damage
could result.<
When you switch on the ignition, the indicator
lamp comes on briefly to indicate an operational
check.
Engine coolant temperature
gauge
Blue
The engine is still cold. Drive at moderate
engine and vehicle speeds.
Between the blue and red zones
Normal operating range. The needle may rise as
far as the edge of the red sector during normal
operation.
Red
When you switch on the ignition, warning
lamp1 comes on briefly to indicate an opera-
tional check.
Comes on while driving:
The engine has overheated. Stop and switch
the engine off immediately and allow it to cool
down.
For checking the coolant level, refer to page89.
Service interval display
The remaining driving distance in miles/km until
the next scheduled service is displayed briefly
immediately after you start the engine or switch
on the ignition.
The words OILSERVICE or INSPECTION indi-
cate the type of service due next. The computer
bases its calculations of the remaining driving
distance on the preceding driving style.
A flashing message and a minus sign in front of
the number mean that the service interval has
already been exceeded by the number of miles/
kilometers shown on the display. Please sched-
ule an appointment with your BMW Center or a
workshop that works according to BMW repair
procedures with correspondingly trained per-
sonnel.
The extent of service work required can
be read out from the remote control by
your BMW Service Advisor.<
Clock
If you wish to have a permanent time display,
you can have it appear in the car radio display,
refer to the Owner's Manual for Radio.
You can set the time and the time display in the
car radio as follows.

Everything under control
48
Setting the clock
1.Press button 2 for several seconds until the
hours are displayed and the colon flashes.
2.Press button1 repeatedly until the required
hour is set.
3.Press button2 to switch to the minutes dis-
play.
4.Press button1 repeatedly until the required
minutes are set.
5.Press button2 to confirm the time.
The set time of day is transferred to the car
radio display or appears in the instrument clus-
ter display.
Computer*
To view the information on the instrument clus-
ter display, press the onboard computer button
BC in the turn signal lever.
Each time you tap the onboard computer but-
ton, the following information is shown in the
specified order:
>Time
>Outside temperature
>Average fuel consumption
>Cruising range>Average speed
With the ignition key in position 1 or higher, the
respective last active setting is displayed.
If you wish, you can have all the following
information displayed in another unit of
measure.<
Setting the time format
You can have the clock displayed in 12h or 24h
mode:
While the time display is active, press the
onboard computer button BC in the turn signal
lever until the display changes.
Changing unit of measure: °F/°C
While the outside temperature display is active,
press the onboard computer button BC in the
turn signal lever until the display changes.
Average fuel consumption
The average fuel consumption is calculated for
the time for which the engine has been running.
To reset the average fuel consumption display:
Press the onboard computer button BC in the
turn signal lever for approx. 2 seconds.
Cruising range
The computer bases its calculations of the
cruising range on the preceding driving style
and on the amount of fuel remaining in the tank.
Be sure to refuel as soon as possible once
your cruising range falls below 30 miles/
50 km, otherwise engine functions are not
ensured and damage can occur.<
Average speed
The average speed is calculated for the time for
which the engine has been running.
To reset the average speed display:
Press the onboard computer button BC in the
turn signal lever for approx. 2 seconds.

Mobility
This section helps you maintain your car's
mobility by supplying important information
on vital topics including fuels and lubricants,
wheels and tires, service, maintenance and
breakdown assistance.
Mobility

Refueling
78
Refueling
Always switch off the engine before refu-
eling. Otherwise the tank cannot be
refilled. The Service Engine Soon warning lamp
will come on.<
Take all precautionary measures and
observe all applicable regulations when
handling fuel. Do not carry any spare fuel con-
tainers in your vehicle. They can develop a leak
and cause an explosion or cause a fire in the
event of an accident.<
Gas cap
Opening
1.Open the fuel filler door, arrow 1.
2.Turn the gas cap counterclockwise.
3.Place the gas cap in the bracket attached to
the fuel filler door, arrow 2.
Closing
Fit the gas cap and turn it clockwise until you
clearly hear a click.
Do not jam the strap between the gas cap
and the vehicle.<
Warning lamp
* lights up.
The gas cap is not properly closed or is
missing. Check if the gas cap is prop-
erly closed.
Manually releasing the fuel filler door
In the event of a malfunction, you can release
the fuel filler door manually:1.Remove the cover for the right-hand rear
lamps in the cargo bay by turning the lock,
see arrow.
2.Pull the cargo bay trim panel slightly toward
the interior. The green button with the fuel
pump symbol becomes visible.
3.Undo the adhesive strip and pull off.
4.Pull the button. The fuel filler door is
released.
Pull on the button slowly and care-
fully; otherwise it could be torn off.<
Observe the following when refueling
When handling fuels, comply with all of
the applicable safety precautions posted
at the service station.<
When refueling, insert the filler nozzle com-
pletely into the filler pipe. Avoid lifting the filler
nozzle while filling the tank, as it could other-
wise lead to:
>Premature pump shutoff
>A reduced efficiency of the fuel-vapor
recovery system.

Reference
At a glance
Controls
Driving tips
Mobility
79
The fuel tank is full when the filler nozzle shuts
off the first time.
Fuel tank capacity
Approx. 14.5 US gallons/55 liters, including the
reserve capacity of approx. 2.1 US gallons/
8liters.
Do not drive until the fuel tank is empty.
Otherwise, the engine may not operate
properly and damage could result.<
Fuel specifications
Do not fill the tank with leaded fuel, as this
would cause permanent damage to the
catalytic converter.<
Required fuel
Super Premium Gasoline/AKI 91
This gasoline is highly recommended. How-
ever, you may also use gasoline with less AKI.
The minimum AKI Rating is 87.
If you use gasoline with this minimum AKI Rat-
ing, the engine may produce knocking sounds
when starting at high outside temperatures.
This has no effect on the engine life.
Use high-quality brands
Field experience has indicated significant dif-
ferences in fuel quality: volatility, composition,
additives, etc., among gasolines offered for sale
in the United States and Canada. Fuels contain-
ing up to and including 10 % ethanol or other
oxygenates with up to 2.8 % oxygen by weight,
that is, 15 % MTBE or 3 % methanol plus an
equivalent amount of co-solvent, will not void
the applicable warranties with respect to
defects in materials or workmanship.
The use of poor-quality fuels may result in
drivability, starting and stalling problems
especially under certain environmental condi-
tions such as high ambient temperature and
high altitude.
Should you encounter driveability problems
which you suspect could be related to the fuel you are using, we recommend that you respond
by switching to a recognized high-quality brand
such as gasoline that is advertised as Top Tier
Detergent Gasoline.
Failure to comply with these recommendations
may also result in unscheduled maintenance.<

Reference
At a glance
Controls
Driving tips
Mobility
85
approved wheels and tires are used, BMW can-
not evaluate their suitability, and therefore can-
not be held liable for driving safety.<
You can inquire about the correct wheel/tire
combination at your BMW Center.
The correct combination of wheels and tires is
also necessary to ensure reliable operation of
various vehicle systems such as ABS and DSC.
To maintain good handling and vehicle
response, only use tires of a single brand and
tread configuration. After a tire has been dam-
aged, for instance, mount the original wheel and
tire combination again as soon as possible.
Recommended tire brands
Certain makes of tire are recommended by
BMW for each tire size. They are marked with a
clearly visible BMW designation on the sidewall
of the tire.
When properly used, these tires meet the high-
est standards in terms of safety and handling
characteristics.
Run-Flat Tires
When mounting new tires or changing over
from summer to winter tires and vice versa,
mount Run-Flat Tires for your own safety. In the
event of a flat, moreover, no spare wheel is
available. Your BMW Center will be glad to pro-
vide you with more information.
For safety reasons, BMW recommends
that damaged Run-Flat Tires be replaced
rather than repaired.<
Special characteristics of winter tires
BMW recommends the use of winter tires for
operation under winter road conditions. While all-season tires with M+S designation provide
better winter traction than summer tires, they
generally do not achieve the full performance of
winter tires.
Pay attention to speed
Always comply with the speed limit for the
winter tires mounted on your car; failure
to do so could result in tire damage and acci-
dents.<
If the car is capable of speeds higher than that
permitted for the winter tires, a label stating the
maximum permitted speed for the mounted
tires must be displayed in your field of view.
Specialist tire dealers and your BMW Center
can supply these labels.
Storage
Store tires in a cool, dry place, protecting them
against light whenever possible. Protect the
tires from contact with oil, grease and fuel. Do
not exceed the maximum tire inflation pressure
indicated on the sidewall of the tire.
Snow chains*
Only certain fine-link snow chains have been
tested by BMW, classified as safe for use and
recommended. Consult your BMW Center for
more information. Attach snow chains in pairs
and only to the rear wheels.
Observe the manufacturer's instructions when
mounting snow chains. Do not exceed a speed
of 30 mph/50 km/h when using snow chains.
You are not permitted to mount snow chains to
tires of the following sizes:
>255/40 R 17
>255/35 R 18
Do not initialize the Flat Tire Monitor if
snow chains are mounted, otherwise the
instrument might issue an incorrect reading.
When driving with snow chains, you may find it
helpful to activate DTC temporarily, refer to
page50.<

Reference
At a glance
Controls
Driving tips
Mobility
87
Important parts in the engine compartment
1Washer fluid reservoir for headlamp clean-
ing system and window washer system,
refer to page44
2Filler neck for engine oil, refer to Adding
engine oil3Jump-starting connection, refer to page99
4Reservoir for brake fluid, refer to page90
5Body ground, negative terminal, refer to
page100
6Expansion tank for coolant, refer to page89
Engine oil
Oil consumption is directly influenced by your
driving style and vehicle operating conditions.
Warning lamp
Engine oil pressure
The warning lamp lights up in red:
The engine oil pressure is too low.
Stop the vehicle immediately and
switch off the engine. Check the engine oil level
and top up if necessary. If the oil level is correct,
please contact your nearest BMW Center or a
workshop that works according to BMW repair
procedures with correspondingly trained per-
sonnel.Do not continue driving, otherwise the
engine could sustain serious damage
from inadequate lubrication.<
Engine oil level
The warning lamp lights up in yellow
while you are driving. In addition, a sig-
nal sounds and "+1.0" appears in the
instrument cluster, refer to page88.
The oil level is at the absolute minimum; refill as
soon as possible. Do not drive more than
125 miles/200 km before refilling.
The warning lamp comes on in yellow
after the engine is switched off. A signal
also sounds.
Add engine oil at the earliest opportunity, e.g.
when you stop to refuel.

Maintenance
92
Exhaust emission values
The warning lamp lights up: the
exhaust emission values have wors-
ened. Have the car checked as soon as
possible.
The lamps flash under certain conditions. This
indicates excessive misfiring of the engine. If
this happens, you should reduce your speed
and visit your nearest BMW Center as soon as
possible. Severe engine misfiring can quickly
lead to serious damage of emissions-related
components, especially the catalytic converter.
Canadian models display this warning
lamp.
If the gas cap is not properly tightened,
the OBD system will assume that fuel
vapor is escaping. An indicator will then light up.
If the cap is then tightened, the indicator will go
out within a few days.<
Event Data Recorders
Your vehicle may be equipped with one or sev-
eral measuring or diagnostic modules or a
device for recording or sending certain vehicle
data or information. In addition, if you have
signed a subscription contract for BMW Assist,
certain vehicle data may be transmitted or
recorded in order to facilitate the corresponding
services.
Care
Important information on the care and mainte-
nance of your BMW is contained in the Caring
for your vehicle brochure.