engine BMW 640I CONVERTIBLE 2012 Workshop Manual

This indicates that there is excessive
misfiring in the engine.
Reduce the vehicle speed and have
the system checked immediately;
otherwise, serious engine misfiring
within a brief period can seriously
damage emission control compo‐
nents,
in particular the catalytic con‐
verter.
Fuel cap The indicator lamp lights up.
If the fuel cap is not properly tightened,
the

OBD system may conclude that fuel
vapor is escaping. If the cap is then tightened,
the display should go out in a short time.
Data memory
Your vehicle records data relating to vehicle op‐
eration, faults and user settings. These data are
stored in the remote control and can be read out
with suitable devices, particularly when the ve‐
hicle is serviced. The data obtained in this way
provide valuable information for service proc‐
esses and repair or for optimizing and develop‐
ing vehicle functions further.
In addition, if you signed a service contract for
Assist, certain vehicle data can be sent directly
from the vehicle to facilitate the desired serv‐
ices. Seite 242
242 Online Edition for Part no. 01 40 2 606 521 - 03 11 490Maintenance

Do not touch the bulbs
Do not touch the glass of new bulbs with
your bare hands, as even minute amounts of
contamination will burn into the bulb's surface
and reduce its service life.
Use
a clean tissue, cloth or something similar, or
hold the bulb by its base.◀
Light-emitting diodes (LEDs)
Light-emitting diodes installed behind a cover
serve as the light source for controls, display el‐
ements and other equipment.
These light-emitting diodes, which are related
to conventional lasers, are officially designated
as Class 1 light-emitting diodes.
Do not remove the covers
Do not remove the covers, and never stare
into the unfiltered light for several hours; other‐
wise, irritation of the retina could result.◀
Headlamp glass
Condensation can form on the inside of the ex‐
ternal lamps in cool or humid weather. When the
light is switched on, the condensation evapo‐
rates after a short time. The headlamp glasses
do not need to be changed.
If there is a large amount of moisture, e.g., water
droplets form in the lamp, have it checked by
your service center.
Front lamps, bulb replacement
Xenon headlamps
Because of the long life of these bulbs, the like‐
lihood of failure is very low. Switching the lamps
on and off frequently shortens their life.
If a bulb fails, switch on the front fog lamps* and
continue the trip with great care. Comply with
local regulations.
Do not perform work/bulb replacement on
xenon headlamps
Have any work on the xenon lighting system, in‐
cluding bulb replacement, performed only by a
service center. Due to the high voltage present in the system,
there
is the danger of fatal injuries if work is car‐
ried out improperly.◀
For checking and adjusting headlamp aim,
please contact your BMW center.
LEDs or light modules
The following lamps are equipped with LED
technology or are designed as light modules:
▷ Parking lamps and roadside parking lamps
▷ Turn signal lamps
▷ Front fog lamps*
▷ Daytime running lights*
Contact your service center in the event of a
malfunction.
Follow the general instructions on lamps and
bulbs, refer to page 243.
Corner-illuminating lamps

*
Follow the general instructions on lamps and
bulbs, refer to page 243.
The illustration shows the left side of the engine
compartment.
55-watt bulb, H3
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Replacing components

Vehicle battery
Maintenance
The battery is maintenance-free, i.e., the elec‐
trolyte will last for the life of the battery.
Your
service center will be glad to advise you on
questions regarding the battery.
Battery replacement
Use approved vehicle batteries only.
Only use vehicle batteries that have been
approved for your vehicle by the manufacturer;
otherwise, the vehicle could be damaged and
systems or functions may not be fully availa‐
ble.◀
After a battery replacement, have the battery
registered on the vehicle by your service center
to ensure that all comfort functions are fully
available.
Charging the battery
In the vehicle, only charge the battery via the
terminals, refer to page 250, in the engine com‐
partment with the engine off.
Power failure
After a temporary power loss, some equipment
needs to be reinitialized.
Individual settings need to be reprogrammed:
▷ Seat, mirror, and steering wheel memory:
store the positions again.
▷ Time: update.
▷ Date: update.
▷ Radio station: save again.
▷ Navigation system: wait for the operability of
the navigation.
Disposing of old batteries Have old batteries disposed of by your
service center or bring them to a recy‐
cling center.
Maintain the battery in an upright position for
transport and storage. Secure the battery so
that it does not tip over during transport. Fuses
Notes
Replacing fuses
Never attempt to repair a blown fuse and
do
not replace a defective fuse with a substitute
of another color or amperage rating; this could
lead to a circuit overload, ultimately resulting in
a fire in the vehicle.◀
Plastic tweezers and information on the fuse
types and locations are stored in the fuse box in
the cargo area.
In the glove compartment Push the handle to the side, arrow 1, and open
the lid, arrow 2.
In the cargo area
Open the cover on the right side trim.
Information on the fuse types and locations is
found on a separate sheet. Seite 247
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Reference
Mobility Communication Entertainment Navigation Driving tips Controls At a glance

Assist Response Center may still be able to
hear you.
Initiating an Emergency Request
automatically
Under certain conditions, an Emergency Re‐
quest is automatically initiated immediately after
a severe accident. Automatic Collision Notifica‐
tion is not affected by pressing the SOS button.
Warning triangle* The warning triangle is located under a cover on
the left side of the cargo area.
Press against the lower edge of the cover and
remove the cover.
First aid kit*
The first aid kit is located in the insert in the rear
seat backrest.
1.
Pull the release and remove the insert from
the front. 2.
Remove the first aid kit. When replacing the insert, place both pins into
the rail at the bottom and press the insert back
in place. Ensure that the rear seat backrest up‐
holstery is not damaged.
Some of the articles have a limited service life.
Check the expiration dates of the contents reg‐
ularly and replace any items promptly.
Roadside Assistance
Service availability
Roadside Assistance can be reached around the
clock in many countries. You can obtain assis‐
tance there in the event of a vehicle breakdown.
Roadside Assistance
The Roadside Assistance, refer to page
219
phone number can be viewed on the iDrive or a
connection to Roadside Assistance* can be es‐
tablished directly.
Jump starting
Notes
If the battery is discharged, an engine can be
started using the battery of another vehicle and
two jumper cables. Only use jumper cables with
fully insulated clamp handles.
To prevent personal injury or damage to both
vehicles, adhere strictly to the following proce‐
dure.
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Reference
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Do not touch live parts
To avoid the risk of potentially fatal injury,
always avoid all contact with electrical compo‐
nents while the engine is running.◀
Preparation
1. Check whether the battery of the other ve‐
hicle
has a voltage of 12 volts. This informa‐
tion can be found on the battery.
2. Switch off the engine of the assisting vehi‐
cle.
3. Switch off any electronic systems/power
consumers in both vehicles.
Bodywork contact between vehicles
Make sure that there is no contact be‐
tween the bodywork of the two vehicles; other‐
wise, there is the danger of short circuits.◀
Starting aid terminals
Connecting order
Connect the jumper cables in the correct
order; otherwise, there is the danger of injury
from sparking.◀ The so-called starting aid terminal in the engine
compartment acts as the battery's positive ter‐
minal. The body ground or a special nut acts as the
negative terminal.
Connecting the cables
1.
Pull off the cap of the BMW starting aid ter‐
minal.
2. Attach one terminal clamp of the positive
jumper cable to the positive terminal of the
battery,

or to the corresponding starting aid
terminal of the vehicle providing assistance.
3. Attach the other end of the cable to the pos‐
itive terminal of the battery, or to the corre‐
sponding

starting aid terminal of the vehicle
to be started.
4. Attach one terminal clamp of the negative
jumper

cable to the negative terminal of the
battery, or to the corresponding engine or
body ground of the vehicle providing assis‐
tance.
5. Attach the other end of the cable to the neg‐
ative

terminal of the battery, or to the corre‐
sponding engine or body ground of the ve‐
hicle to be started.
Starting the engine
Never use spray fluids to start the engine.
1. Start the engine of the assisting vehicle and
let

it run for several minutes at an increased
idle speed.
If the vehicle being started has a diesel en‐
gine: let the engine of the assisting vehicle
run for approx. 10 minutes.
2. Start the engine of the vehicle being started
in the usual way.
If

the first starting attempt is not successful,
wait a few minutes before making another
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Breakdown assistance

attempt in order to allow the discharged bat‐
tery to recharge.
3. Let both engines run for several minutes.
4. Disconnect the jumper cables in the reverse
order.
Check the battery and recharge if necessary.
Tow-starting and towing
Manual transmission
Observe before towing your vehicle
The parking brake is blocked
The parking brake cannot be released
manually.
When the parking brake is blocked, do not tow
with the front axle lifted or the vehicle can be
damaged.
Contact your service center.◀
Gearshift lever in neutral position.
Towing
Follow the towing instructions
Follow all towing instructions; otherwise,
vehicle damage or accidents may occur.◀
▷ Make sure that the ignition is switched on;
otherwise, the low beams, tail lamps, turn
signals, and windshield wipers may be un‐
available.
▷ Do not tow the vehicle with the rear axle
tilted, as the front wheels could turn.
▷ When the engine is stopped, there is no
power assist. Consequently, more force
needs
to be applied when braking and steer‐
ing.
▷ Larger steering wheel movements are re‐
quired. Tow truck
Have your vehicle transported with a tow truck
with a so-called lift bar or on a flat bed.
Do not lift the vehicle
Do not lift the vehicle by the tow fitting or
body

and chassis parts; otherwise, damage may
result.◀
Automatic transmission*: transporting
your vehicle
Note
Your vehicle is not permitted to be towed.
Therefore, contact a service center in the event
of a breakdown.
Do not have the vehicle towed
Have your vehicle transported on a loading
platform only; otherwise, damage may occur.◀
Tow truck Do not lift the vehicle
Do not lift the vehicle by the tow fitting or
body

and chassis parts; otherwise, damage may
result.◀
Use the tow fitting screwed in at the front for
maneuvering the vehicle only. Seite 251
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Reference
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Towing other vehicles
General information
Light towing vehicle
Your vehicle must not be lighter than the
vehicle being towed; otherwise, it will not be
possible to control vehicle response.◀
Attaching the tow bar/tow rope correctly
Attach the tow bar or tow rope to the tow
fitting; connecting it to other vehicle parts may
cause damage.◀
▷ Switch on the hazard warning system, de‐
pending on local regulations.
▷ If the electrical system has failed, clearly
identify the vehicle being towed by placing
a sign or a warning triangle in the rear win‐
dow.
Tow bar
The tow fittings used should be on the same
side on both vehicles.
Should it prove impossible to avoid mounting
the tow bar at an offset angle, please observe
the following:
▷ Maneuvering capability is limited during cor‐
nering.
▷ The tow bar will generate lateral forces if it
is secured with an offset.
Tow rope
When starting to tow the vehicle, make sure that
the tow rope is taut.
To avoid jerking and the associated stresses on
the vehicle components when towing, always
use nylon ropes or nylon straps.
Attaching the tow rope correctly
Only secure the tow rope on the tow fit‐
ting; otherwise, damage can occur when it is se‐
cured on other parts of the vehicle.◀ Tow fitting
The screw-in tow fitting should always be car‐
ried in the vehicle. It can be screwed in at the
front or rear of the BMW. It is contained in the
tool kit under the cargo floor cover.
Tow fitting, information on use
▷Use only the tow fitting provided with
the vehicle and screw it all the way in.
▷ Use the tow fitting for towing on paved roads
only.
▷ Avoid lateral loading of the tow fitting, e.g.,
do not lift the vehicle by the tow fitting.
Otherwise, damage to the tow fitting and the ve‐
hicle can occur.◀
Screw thread Push out the cover by pressing on the top edge.
Tow-starting
Automatic transmission

*
Do not tow-start the vehicle.
Due to the automatic transmission, the engine
cannot be started by tow-starting.
Have the cause of the starting difficulties rem‐
edied. Seite 252
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Breakdown assistance

Manual transmission
If
possible, do not tow-start the vehicle but start
the engine by jump-starting, refer to page 249.
If the vehicle is equipped with a catalytic con‐
verter, only tow-start while the engine is cold.
1. Switch on the hazard warning system and
comply with local regulations.
2. Ignition, refer to page 65, on.
3. Engage third gear.
4. Have the vehicle tow-started with the clutch
pressed

and slowly release the clutch. After
the engine starts, immediately press on the
clutch again.
5. Stop at a suitable location, remove the tow
bar or rope, and switch off the hazard warn‐
ing system.
6. Have the vehicle checked.
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Care
Car washes
Notes
Steam jets or high-pressure washers
When using steam jets or high-pressure
washers, hold them a sufficient distance away
and use a maximum temperature of 140 ℉/
60 ℃.
Holding them too close or using excessively
high
pressures or temperatures can cause dam‐
age or preliminary damage that may then lead to
long-term damage.
Follow the operating instructions for the high-
pressure washer.◀
Cleaning sensors/cameras with high-
pressure washers
When using high-pressure washers, do not
spray the exterior sensors and cameras, e.g.,
Park Distance Control*, for extended periods of
time and only from a distance of at least 12 in/
30 cm.◀
Wash your vehicle frequently, particularly in win‐
ter.
Intense soiling and road salt can damage the ve‐
hicle.
Washing in automatic car washes
Your vehicle can be washed in automatic car
washes right from the start.
Give preference to cloth car washes or those
that use soft brushes in order to avoid paint
damage.
Notes
Note the following:
▷ Make sure that the wheels and tires are not
damaged by the transport mechanisms.
▷ Fold in the exterior mirrors; otherwise, they
may

be damaged, depending on the width of
the vehicle. ▷
Deactivate the rain sensor, refer to page 70,
to avoid unintentional wiper activation.
▷ Do not treat the convertible top with wax.
Ensure that a cycle without wax or a special
cycle for convertibles is available.
▷ In some cases, an unintentional alarm can be
triggered

by the interior motion sensor of the
alarm system*. Follow the instructions on
avoiding an unintentional alarm, refer to
page 43.
Guide rails in car washes
Avoid car washes with guide rails higher
than 4 in/10 cm; otherwise, the vehicle body
could be damaged.

◀
Before driving into a car wash
The vehicle is able to roll when the following
steps are taken:
Manual transmission:
1. Shift to neutral.
2. Release the parking brake, refer to page 67.
3. Switch the engine off.
4. Switch on the ignition.
Automatic transmission*:
1. Depress the brake pedal.
2. Engage transmission position N.
3. Release the parking brake, refer to page 67,
or deactivate Automatic Hold, refer to
page 67.
4. Switch the engine off.
Transmission
position P with the igni‐
tion off
When the ignition is switched off, position P
is engaged automatically. When in an auto‐
matic car wash, for example, ensure that the
ignition is not switched off accidentally.◀ The vehicle cannot be locked from the outside
when in transmission position N. Seite 254
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Care

Everything from A to Z
Index
A
ABS, Antilock Brake Sys‐
tem 101
Activated-charcoal filter 126
Active Blind Spot Detec‐ tion 98
Active seat, front 55
Active seat ventilation, front 55
Active Steering, integral 102
Adaptive brake lights, refer to Brake force display 100
Adaptive drive 102
Adaptive light control 85
Additional telephone 196
Additives, oil 239
Adjustments, seats/head re‐ straints 53
Airbags 88
Airbags, indicator/warning light 89
Air circulation, refer to Recir‐ culated-air mode 125
Air distribution, manual 123
Air drying, refer to Cooling function 125
Air pressure, tires 229
Air vents, refer to Ventila‐ tion 126
Air volume, automatic climate control 124
Alarm system 42
Alarm, unintentional 43
All around the center con‐ sole 17
All
around the interior rearview
mirror 18
All around the steering wheel 12
ALL program, automatic cli‐ mate control 125 All-season tires, refer to Win‐
ter tires 233
Alternating-code hand-held transmitter 129
Alternative oil types 239
AM/FM station 166
Announcement, navigation, refer to Spoken instruc‐
tions 155
Antifreeze, washer fluid 71
Antilock Brake System, ABS 101
Anti-slip control, refer to DSC 101
Appointments 212
Approved engine oils 239
Apps 222
Armrest, refer to Center arm‐ rest 132
Arrival time 78
Ashtray 129
Assist 218
Assistance, Roadside Assis‐ tance 249
Assistance when driving off 101
Audio playback 173
Audio playback, Blue‐ tooth 188
AUTO intensity 124
Automatic car wash 254
Automatic Curb Monitor 59
Automatic deactivation, front passenger airbags 89
Automatic headlamp con‐ trol 85
Automatic Hold 67
Automatic locking 39
Automatic recirculated-air control 125
Automatic Soft Closing, doors 40 Automatic transmission with
Steptronic 72
AUTO program, automatic cli‐ mate control 124
AUTO program, intensity 124
AUX-IN port 184
Average fuel consumption 77
Average speed 77
Axle loads, weights 261
B
Backrest curvature, refer to Lumbar support 54
Backrest, seats 53
Backrest, width 54
Backup camera 110
Backup lamps, bulb replace‐ ment 245
Balance 164
Band-Aids, refer to First aid kit 249
Bar for tow-starting/tow‐ ing 252
Bass 164
Battery replacement, vehicle battery 247
Battery replacement, vehicle remote control 32
Battery, vehicle 247
Before entering the car wash 254
Belts, safety belts 56
Beverage holder, cu‐ pholder 133
Bluetooth audio 188
BMW Apps 222
BMW Apps, video play‐ back 187
BMW Assist 218
BMW EfficientDynamics, refer to Saving fuel 141
BMW homepage 6
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Everything from A to Z