2010 BMW 128I CONVERTIBLE engine

5Reference
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The individual vehicle
When you ordered your BMW, you chose vari-
ous items of equipment. This Owner's Manual
describes the entire array of options and equip-
ment available with a specific BMW model.
Please bear in mind that the manual may con-
tain information on accessories and equipment
that you have not specified for your own vehicle.
Sections describing options and special equip-
ment are marked by asterisks
* to assist you in
identifying possible differences between the
descriptions in this manual and your own vehi-
cle's equipment.
If equipment in your BMW is not described in
this Owner's Manual, please refer to the accom-
panying Supplementary Owner's Manuals.
Editorial notice
BMW pursues a policy of continuous, ongoing
development that is conceived to ensure that
our vehicles continue to embody the highest
quality and safety standards combined with
advanced, state-of-the-art technology. For this
reason, it is possible in exceptional cases that
features described in this Owner's Manual
could differ from those on your vehicle.
For your own safety
Maintenance and repair
Advanced technology, e.g. the use of
modern materials and powerful electron-
ics, requires specially adapted maintenance
and repair methods. You should therefore have
the corresponding work on your vehicle per-
formed only by your BMW center or at a work-
shop that works according to BMW repair pro-
cedures with correspondingly trained
personnel. If this work is not carried out prop-
erly, there is a danger of subsequent damage
and related safety hazards.<
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 Original 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.
Original 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 accessories not
approved by BMW, 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 radio or sim-
ilar accessories, may cause extensive damage
to the vehicle, compromise its safety, interfere
with the vehicle's electrical system or affect the
validity of the BMW Limited Warranty. See your
BMW center for additional information.<
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.<
California Proposition 65 warning
California law requires us to issue the following
warning:
Engine exhaust and a wide variety of
automobile components and parts,

Notes
6 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.<
Service and warranty
We recommend that you read this publication
thoroughly.
Your BMW is covered by the following warran-
ties:
>New Vehicle Limited Warranty
>Rust Perforation Limited Warranty
>Federal Emissions System Defect Warranty
>Federal Emissions Performance Warranty
>California Emission Control System Limited
Warranty
Detailed information about these warranties is
listed in the Service and Warranty Information
Booklet for US models or in the Warranty and
Service Guide Booklet for Canadian models.
Your vehicle has been specifically adapted and
designed to meet the particular operating con-
ditions and homologation requirements in your
country and continental region in order to
deliver the full driving pleasure while the vehicle
is operated under those conditions. If you wish
to operate your vehicle in another country or
region, you may be required to adapt your vehi-
cle to meet different prevailing operating condi-
tions and homologation requirements. You
should also be aware of any applicable warranty
limitations or exclusions for such country or
region. In such case, please contact Customer
Relations for further information.

At a glance
11Reference
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Mobility
7
Fog lamps*89
8
Turn signals59
High beams, headlamp flasher88
High-beam assistant
*88
Roadside parking lamps
*88
Computer64
Settings and information about the
vehicle66
9Instrument cluster12
10
Windshield wipers60
Rain sensor
*60
11Switching the ignition on/off and
starting/stopping the engine55
12Ignition lock55
13Buttons on the steering wheel
Telephone
*:
Accepting and ending a call; dial-
ing
* the selected phone number;
redialing if no phone number is
selected
Volume
Activating/deactivating the voice
activation system
*
Changing the radio station
Interrupting a traffic bulletin
Selecting a music track
Scrolling through the redial list
Next entertainment source
Recirculated-air mode93
14
Steering wheel heating
*51
15Horn, entire surface
16Adjusting the steering wheel51
17
Cruise control
*61
18Releasing the hood198
19Opening the trunk lid31

Cockpit
12
Instrument cluster
1Speedometer
135i: with fuel gauge
2Indicator lamps for turn signals
3Indicator and warning lamps13
4Tachometer63
5Fuel gauge64
135i: engine oil temperature64
6Display for
>Clock63
>Outside temperature63
>Indicator and warning lamps71
7Display for
>Position of automatic transmission
*57
>Computer64
>Date of next scheduled service, and
remaining distance to be driven67
>Odometer and trip odometer63
>High-beam assistant
*88
>Checking the oil level199
>Settings and information66
8Resetting the trip odometer63

At a glance
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Mobility
Indicator and warning lamps
The concept
Indicator and warning lamps can light up in a
variety of combinations and colors.
Several of the lamps are checked for proper
functioning and light up temporarily when the
engine is started or the ignition is switched on.
Text messages
Text messages at the upper edge of the Control
Display explain the meaning of the displayed
indicator and warning lamps.
Supplementary text messages
You can call up more information on the Control
Display, e.g. on the cause of a malfunction and
on how to respond, via Check Control, refer to
page71.In urgent cases, this information will be shown
as soon as the corresponding lamp comes on.
Indicator lamps without text messages
The following indicator lamps notify you that
certain functions are active:
High beams/headlamp flasher88
Fog lamps
*89
Lamp flashes:
DSC or DTC is regulating the propul-
sive forces in order to maintain driving
stability77
Canada: parking brake applied57
Parking brake applied57
Canada: engine malfunction with
adverse effect on emissions204
Engine malfunction with adverse
effect on emissions204

Controls
33Reference
At a glance
Driving tips
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Mobility
motion sensor even if the convertible top is
open. An alarm can be triggered unintentionally
by falling objects such as leaves, refer to Avoid-
ing unintentional alarms.
Avoiding unintentional alarms
The tilt alarm sensor and interior motion sensor
may be switched off at the same time. This pre-
vents unintentional alarms, e.g. in the following
situations:
>In duplex garages
>During transport on car-carrying trains,
boats/ships or on a trailer
>When animals are to remain in the vehicle
Switching off tilt alarm sensor and
interior motion sensor
Press the button on the remote control
again as soon as the vehicle is locked.
The indicator lamp lights up briefly and then
flashes continuously. The tilt alarm sensor and
the interior motion sensor are switched off until
the next time the vehicle is unlocked and subse-
quently locked again.
Comfort Access*
Comfort Access enables you to enter your vehi-
cle without needing to hold the remote control
in your hand. All you need to do is wear the
remote control close to your body, e.g. in your
jacket pocket. The vehicle detects the corre-
sponding remote control within the immediate
vicinity or in the passenger compartment.
Comfort Access supports the following func-
tions:
>Unlocking/locking the vehicle
>Unlocking the trunk lid separately
>Engine starting
>Convenient closing
Functional requirement
>The vehicle or the trunk lid can only be
locked when the vehicle detects that the remote control currently in use is outside of
the vehicle.
>The vehicle cannot be locked or unlocked
again until after approx. 2 seconds.
>The engine can only be started when the
vehicle detects that the remote control cur-
rently in use is inside the vehicle.
Comparison to the standard remote
control
In general, there is no difference between using
Comfort Access or pressing the buttons on the
remote control to carry out the functions men-
tioned above. You should therefore first famil-
iarize yourself with the instructions on opening
and closing starting on page26.
Special features regarding the use of Comfort
Access are described below.
If you notice a brief delay while opening or
closing windows, the glass roof or the
convertible top, the system is checking whether
a remote control is inside the vehicle. Please
repeat the opening or closing procedure, if nec-
essary.<
Unlocking
Grasp the handle on the driver's or front pas-
senger door completely, arrow 1. This corre-
sponds to pressing the button.
Locking
Touch the surface, arrow 2, with your finger for
approx. 1 second. This corresponds to pressing
the button.
To preserve the battery, please make
sure that the ignition and all electrical

Opening and closing
34 consumers are switched off before locking the
vehicle.<
Coupe: Convenient closing
For Convenient closing, keep your finger on the
surface, arrow 2.
Convertible: window and convertible
top operation
With the ignition at radio readiness or beyond,
you can open and close the windows and the
convertible top when a remote control is
located inside the vehicle.
Unlocking the trunk lid separately
Press the button on the outside of the trunk lid.
This corresponds to pressing the button.
If the vehicle detects that a remote con-
trol has been accidentally left inside the
locked vehicle after the trunk lid is closed, the
lid will reopen. The hazard warning flashers
flash and a signal
* sounds.<
Switching on radio readiness
Radio readiness is switched on by pressing the
start/stop button, refer to page55.
Do not depress the brake or the clutch;
otherwise, the engine will start immedi-
ately.<
Starting the engine
You can start the engine or switch on the igni-
tion when a remote control is inside the vehicle.
It is not necessary to insert a remote control into
the ignition lock, refer to page55.
Switching off the engine in cars with
automatic transmission
The engine can only be switched off when the
selector lever is in position P, refer to page56.
To switch the engine off when the selector lever
is in position N, the remote control must be in
the ignition lock.
Malfunctions
Comfort Access may malfunction due to local
radio waves. If this happens, open and close the
vehicle via the buttons on the remote control or
using the integrated key. To start the engine
afterward, insert the remote control into the
ignition lock.
Warning lamps
The warning lamp in the instrument
cluster lights up when you attempt to
start the engine: the engine cannot
be started. The remote control is not inside the
vehicle or is malfunctioning. Take the remote
control with you inside the vehicle or have it
checked. If necessary, insert another remote
control into the ignition lock.
The warning lamp in the instrument
cluster lights up while the engine is
running: the remote control is no
longer inside the vehicle. After the engine is
switched off, the engine can only be restarted
within approx. 10 seconds.
The indicator lamp in the instrument
cluster comes on and a message
appears on the Control Display:
replace the battery in the remote control.
Replacing the battery
The remote control for Comfort Access con-
tains a battery that will need to be replaced from
time to time.
1.Take the integrated key out of the remote
control, refer to page26.
2.Remove the cover.
3.Insert the new battery with the plus side fac-
ing up.

Opening and closing
38 into the opening provided. Move the glass
roof in the desired direction.
6.Reattach the lamp cover and reinstall the
control unit.
Convertible: top
The fully automatic top combines reliable
weather protection with simple and easy-to-
use operation.
The following tips will enhance your driving
pleasure in your Convertible:
>It is advisable that you close the convertible
top when you park the vehicle. Not only
does the closed top protect the vehicle inte-
rior against unanticipated weather damage,
it also offers a certain amount of theft pro-
tection. However, even when the top is
closed, valuables should only be stored in
the locked cargo area.
>Do not attach roof-mounted luggage sys-
tems to the convertible top.
>If the top is opened while it is wet, e.g. after
driving in the rain, water may drip into the
cargo area. If necessary, remove items from
the cargo area beforehand to avoid water
stains or soiling.
At temperatures below +147/–106, do
not move the convertible top as this could
result in damage.
Do not keep the convertible top in the convert-
ible top box for longer than one day if it is wet;
otherwise, the moisture may cause damage.
Do not place objects on the convertible top, as
otherwise they may fall off when you operate
the convertible top and cause damage or injury.
Never move the convertible top when the roll-over protection system is in the activated posi-
tion.
Always fully complete a convertible top move-
ment. Driving with the convertible top incom-
pletely opened or closed can result in damage
or injury.
Do not reach into the mechanism during the
opening or closing procedure. Keep children
away from the opening/closing path of the con-
vertible top.
For safety reasons, only move the convertible
top when the vehicle is stationary, if possible.<
The convertible top swings upward when
opening and closing. When operating the
convertible top in a garage, under a bridge, etc.,
ensure that there are at least 6 ft 7 in/2 m of
headroom; otherwise, the vehicle may be dam-
aged.<
Before opening and closing
>Comply with the safety precautions
described above.
>Ensure that the cargo area partition is
folded down and engaged on both sides,
refer to page102; otherwise, it will not be
possible to open the convertible top.
>Ensure that the cargo does not press
against the cargo area partition from below.
>Ensure that the trunk lid is closed.
Opening and closing
Convertible top operation with Comfort Access,
refer also to page28.
As of radio readiness, refer to page55:
If possible, conserve the battery by only
operating the convertible top when the
engine is running.
Before closing the convertible top, remove all
foreign objects from the windshield frame as