2010 BMW Z4 ROADSTER SDRIVE35I lumbar support

Controls
43Reference
At a glance
Driving tips
Communications
Navigation
Entertainment
Mobility
4Backrest
Lumbar support*
You can also adjust the contour of the backrest
to obtain additional support in the lumbar
region.
The upper hips and spinal column receive sup-
plementary support to help you maintain a
relaxed, upright sitting position.
>Increase or decrease curvature: press the
switch at the front or rear, respectively.
>Shift curvature up or down: press the switch
at the top or bottom, respectively.
Backrest width*
You can change the width of the backrest to suit
your individual preferences by adjusting the lat-
eral-support pads.Press the front or rear end of the switch.
Backrest width decreases or increases accord-
ingly.
Heated seats*
Press once for each temperature level.
Three LEDs indicate the highest temperature.
To switch off:
Press button longer.
If you continue driving within approx. the next
15 minutes, the seat heating is automatically
activated at the previously set temperature.
The temperature is lowered or the heating is
switched off entirely to save on battery power.
The LEDs stay lit.
Seat and mirror memory*
You can store and call up two different combi-
nations of driver's-seat and exterior-mirror
positions.
Settings for the backrest width and lumbar sup-
port are not stored in memory.

Reference 237
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Automatic high beams and
low beams, refer to High-
beam assistant90
Automatic recirculated-air
control AUC98
Automatic Service
Request188
Automatic transmission with
Steptronic53
– interlock53,54
– overriding selector lever
lock55
– shiftlock, refer to Changing
selector lever position54
– sport program54
– towing220
– tow-starting220
AUTO program for automatic
climate control97
AUX-IN port104,163
Available services188
Average fuel consumption66
– setting the units68
Average speed66
Avoid highways in
navigation130
Avoiding unintentional
alarms34
Axle loads, refer to
Weights228
B
Backrest contour, refer to
Lumbar support43
Backrests, refer to Seat
adjustment42
Backrest width adjustment43
Backup lamps
– replacing bulb214
Backup lamps, refer to Tail
lamps214
Band-aids, refer to First-aid
pouch219
Bar, refer to Towing
methods221Base plate for telephone or
mobile phone
– refer to Snap-in adapter180
– refer to Snap-in adapter in
the center armrest storage
compartment104
Bass, tone setting140
Battery216
– charging216
– disposal36,216
– jump-starting219
– remote control28
– temporary power failure216
Battery for mobile phone181
Battery renewal
– remote control36
– remote control for vehicle36
Being towed221
Belts, refer to Safety belts44
Belt tensioner, refer to Safety
belts44
Beverage holders, refer to
Cupholders105
Blower, refer to Air flow
rate94,97
Bluetooth, activating/
deactivating173
Bluetooth, refer to separate
Owner's Manual
BMW
– car shampoo211
BMW Assist,
activating186,188
BMW Assist184
BMW Homepage4
BMW Maintenance
System206
BMW Search186
BMW webpage4
Bottle holders, refer to
Cupholders105
Brake
– parking brake52
Brake Assist, refer to Dynamic
Brake Control DBC78Brake fluid, refer to Service
requirements69
Brake Force Display85
Brake lamps
– Brake Force Display85
– replacing bulb214
Brake pads112
– breaking in112
Brake rotors114
– brakes112
– breaking in112
Brakes
– ABS78
– BMW Maintenance
System206
– breaking in112
– service requirements69
Brakes, refer to Braking
safely114
Brake system112
– BMW Maintenance
System206
– breaking in112
– disc brakes114
Breakdown services, refer to
Roadside Assistance218
Breaking in the clutch112
Breaking in the differential,
refer to Engine and
differential112
Break-in period112
Brightness of Control
Display76
Bulb changing, refer to Lamps
and bulbs212
Button for starting the engine,
refer to Start/stop button50
Buttons on the steering
wheel11
C
California Proposition 65
warning6

Reference 243
At a glance
Controls
Driving tips
Communications
Navigation
Entertainment
Mobility
Keyless opening and closing,
refer to Comfort Access34
Key Memory, refer to Personal
Profile28
Kickdown54
– automatic transmission with
Steptronic54
Knock control193
L
Lamps
– automatic headlamp
control88
– parking lamps/low beams88
Lamps and bulbs, replacing
bulbs212
Language, changing on
Control Display75
Lap-and-shoulder belt, refer
to Safety belts44
Lashing eyes, refer to
Securing cargo116
Last destinations124
Launch Control58
Leather care210
LED Light-emitting
diodes212
Length, refer to
Dimensions227
License plate lamp, replacing
bulb215
Light
– high-beam assistant90
– refer to High-beam
assistant90
Light-alloy wheels210
Light-emitting diodes
LED212
Lighter
– connecting electrical
appliances106
Lighting
– instruments91
– lamps and bulbs212
– vehicle, refer to Lamps88Light switch88
Limit, refer to Speed limit74
Load securing equipment,
refer to Securing cargo116
Lockable lug bolts, refer to
Lug bolt lock215
Lock buttons, doors, refer to
Locking32
Locking
– adjusting confirmation
signal31
– from inside32
– from outside30
– without remote control, refer
to Comfort Access34
Locking and unlocking doors
– confirmation signals31
– from inside32
– from outside29
Low beam control, refer to
High-beam assistant90
Low-beam headlamps88
– automatic88
Lower back support, refer to
Lumbar support43
Lug bolt lock215
Luggage compartment lid32
– Comfort Access
35
– emergency release33
– opening from inside32
– opening from outside33
– remote control30
Lumbar support43
M
M+S tires, refer to Winter
tires200
Maintenance, refer to Service
Booklet
Maintenance system206
Malfunction
– automatic transmission with
Steptronic55
– tires81Malfunction warnings, refer to
Check Control73
Managing music161
Manual air distribution94
Manual car wash209
Manual mode, automatic
transmission with
Steptronic54
Manual operation
– door lock31
– driver's door31
– fuel filler flap192
– transmission lock58
– transmission lock, automatic
transmission55
Manual transmission53
Map display132
Map for navigation
– changing scale133
– entering destination126
Master key, refer to Remote
control with integrated
key28
Maximum cooling97
Maximum speed
– with winter tires200
M dual clutch transmission
with Drivelogic
– Launch Control58
– manually releasing
transmission lock58
– neutral56
– reverse gear56
Measurements, refer to
Dimensions227
Memory, refer to Seat and
mirror memory43
MENU button16
Menus, refer to iDrive16
Messages176
Messages from the concierge
service177