snow chains BMW 328I CONVERTIBLE 2009 E93 Owner's Manual

Technology for driving comfort and safety
84 reduced driving stability. It is therefore neces-
sary to drive with appropriate caution.
You may find it useful to briefly activate DTC
under the following special circumstances:
>When driving uphill on snow-covered roads,
in slush or on unplowed, snow-covered
roads
>When rocking a stuck vehicle free or start-
ing off in deep snow or on loose ground
>When driving with snow chains
Activating DTC
Press the button; the indicator lamps for DTC in
the instrument cluster come on.
For better control
If the indicator lamp flashes:
DTC controls the drive forces and
brake forces.
If the indicator lamps are on:
DTC has been activated.
Deactivating DTC
Press the button again; the DTC indicator
lamps in the instrument cluster go out.
xDrive*
xDrive is your BMW's four-wheel-drive system.
The combined efforts of xDrive and DSC help to
further optimize traction and driving dynamics.
The xDrive four-wheel-drive system distributes
driving power variably to the front and rear axles
depending on the driving situation and road
conditions.
Hill Descent Control HDC*
HDC is a downhill driving assistant that controls
your speed on steep downhill gradients and
makes it even easier to control your BMW's
handling under these conditions. The vehicle
then moves slightly faster than double walking
speed without the driver needing to intervene.
HDC can be activated as long as you are driving
under approx. 20 mph or 35 km/h. When driving
downhill at a speed of under approx. 20 mph or
35 km/h, the vehicle's speed is automatically
reduced to slightly more than double walking
speed and maintained.
Increasing or decreasing speed
By accelerating or braking you can change this
speed within a range from approx. 3 to 15 mph,
approx. 5 to 25 km/h.
You can specify a target speed within the same
range using the cruise control
* lever on the
steering column.
1To increase speed
2To decrease speed
Activating HDC
Press the button; the LED lights up.
When the vehicle is being braked automatically,
the LED flashes.

Controls
85Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
Deactivating HDC
Press the button again; the LED goes out.
HDC is automatically deactivated at speeds
greater than approx. 35 mph/60 km/h.
Using HDC
In cars with manual transmission:
Use HDC in lower gears and in reverse gear.
With automatic transmission:
You can use HDC in any drive position.
Displays in the instrument cluster*
1Display for target speed
2HDC display
Malfunction
The HDC display disappears during HDC oper-
ation, or does not appear:
HDC is temporarily unavailable due to exces-
sive brake temperature, or DSC has failed.
Drive-off assistant
The drive-off assistant enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the parking brake for this.
1.Hold the car in place by depressing the
brake.
2.Release the brake and drive off without
delay.
The drive-off assistant holds the car in
place for approx. 2 seconds after the
brake is released. Drive off without delay after
releasing the brake. Otherwise, the drive-off
assistant will no longer hold the car in place after approx. 2 seconds and the car will start to
roll backwards.<
Flat Tire Monitor FTM*
The concept
The Flat Tire Monitor detects pressure loss in a
tire by comparing the rotating speeds of the
individual tires while moving.
In the event of pressure loss, the rolling circum-
ference changes and, thus, the rotating speed
of the affected wheel. This change is detected
and is reported as a flat tire.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.
The system must be reinitialized each
time a tire inflation pressure has been cor-
rected or a wheel or tire has been changed.<
System limitations
The Flat Tire Monitor is unable to warn
the driver of sudden, severe tire damage
caused by external factors, nor can it identify
the gradual loss of pressure that will inevitably
occur in all four tires over a lengthy period of
time.<
In the following situations, the system could be
delayed or malfunction:
>System has not been initialized
>Driving on snowy or slippery road surface
>Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration
>Snow chains are attached
Initializing the system
The initialization is completed during driv-
ing, which can be interrupted at any time.
When driving resumes, the initialization is con-
tinued automatically.
Do not initialize the system while snow chains
are attached.<

Mobility
205Reference
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
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.
Special characteristics of winter tires
BMW recommends winter tires for winter roads
or at temperatures below +45°F/+7°C.
Although all-season M+S tires provide better
winter traction than summer tires, they gener-
ally fail to provide the same levels of cold-
weather performance as 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
Always store wheels and tires in a cool, dry
place with as little exposure to light as possible.
Always protect tires against all contact with oil,
grease and fuels. Do not exceed the maximum
tire inflation pressure indicated on the sidewall
of the tire.
Swapping wheels between axles
BMW advises against swapping wheels
between the front and rear axles, even if all tires
have the same size, as this could impair driving
characteristics. If the tires are of mixed sizes,
swapping wheels between the axles is not per-
missible.
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.
Snow chains must be mounted in pairs and on
the rear wheels only. Observe the manufac-
turer's instructions when mounting snow
chains. Do not exceed a speed of 30 mph or
50 km/h.
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
page83.<

Reference 247
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Eyes
– for tow-starting and towing
away227
– for tying down loads120
F
Failure messages, refer to
Check Control77
Failure of an electrical
consumer223
False alarm
– avoiding unintentional
alarm33
– switching off an alarm33
Fastening safety belts, refer to
Safety belts48
Fastest route for
navigation135
Fast forward
– CD changer154
– CD player154
Filter
– refer to Microfilter/activated-
charcoal filter for automatic
climate control100
First aid pouch225
Fixture for remote control,
refer to Ignition lock55
Flash when locking/
unlocking29
Flat tire
– Run-Flat Tires204
– Tire Pressure Monitor
TPM86
Flat Tire Monitor FTM85
– indicating a flat tire86
– indicator/warning lamp86
– initializing the system85
– malfunction86
– snow chains85,205
– system limits85
Flat tires, refer to Tire
condition203
Fluid reservoir, refer to
Washer fluid reservoir61
FM, waveband147
Fog lamps95
– indicator lamp13,95Folding up the floor panel111
Footbrake, refer to Braking
safely118
Footwell lamps, refer to
Interior lamps96
For your own safety5
Four-wheel drive, refer to
xDrive84
Free memory capacity, music
collection161
Front airbags90
FTM, refer to Flat Tire
Monitor85
Fuel193
– average consumption71
– gauge70
– high-quality brands193
– quality193
– specifications193
– tank contents, refer to
Capacities235
Fuel clock, refer to Fuel
gauge70
Fuel display, refer to Fuel
gauge70
Fuel filler door192
– releasing in the event of
electrical malfunction192
Fuses223
G
Garage door opener, refer to
Integrated universal remote
control102
Gasoline
– refer to Average
consumption71
Gasoline, refer to Required
fuel193
Gasoline display, refer to Fuel
gauge70
Gear indicator, automatic
transmission with
Steptronic57
Gearshift lever
– automatic transmission with
Steptronic58
– manual transmission57Gearshifts
– automatic transmission with
Steptronic58
– manual transmission57
General driving notes117
Glass roof, electric37
– closing after electrical
malfunction38
– convenient operation28,30
– initializing37
– opening, closing37
– operation with convenient
access34
– pinch protection system37
– power failure37
– raising37
– remote control28
Glove compartment105
GPS navigation, refer to
Navigation system124
Grills97
Gross vehicle weight, refer to
Weights235
H
Handbrake, refer to Parking
brake56
Hands-free system14
Hazard warning flashers14
HDC Hill Descent Control84
HD radio, refer to High
Definition Radio148
Head airbags90
Headlamp control,
automatic93
Headlamp flasher59
– indicator lamp11,13
Head restraints44
– rear, removing46
– sitting safely42
Heated
– mirrors50
– rear window100
– seats47