New-design soft-top in manual and power versions

Like its predecessor, the Z4 offers manual and power roadster soft tops, the latter optional on both models. The top is completely new in design and function; both versions include many attractions. (new features are indicated with an asterisk):

• One-hand release/lock*. A centrally placed one-hand grip releases the top from the windshield header or locks it in place.
• Top header becomes Integrated tonneau cover*. Thanks to a new "parallel" folding sequence, the top's forward section remains upright as the top folds and then serves as the integrated tonneau cover for the folded top. This makes folding or raising the top essentially a one-step process.
• Extra-easy operation*. Gas-filled struts reduce the effort required to lower and raise the top.
• Heated glass rear window*. Eliminates scratches and periodic replacement; improves rearward vision in inclement weather.
• Interior lining for excellent weather protection and reduced wind noise when the top is up.
• Aluminum and magnesium frame* for low weight and inertia.
• Variable stowage compartment*. As in 3 Series convertibles, a soft-top stowage compartment can be adjusted to increase trunk space by more than half a cubic foot when the top is up. Altogether larger than the Z3 trunk because of its greater depth and lack of a spare tire, the Z4's compartment will hold two golf bags or many other cargo combinations.

The fully automatic power top is another new Z4 feature

To lower the top, the user simply presses a button. The top unlatches from the header and folds down. Raising the top is also fully automatic; both occur lightning-fast (in ten seconds) and quietly. The power top includes all features of the standard one, plus a choice of colors: In addition to the standard black, the power top is available in Gray and Dark Beige according to body and interior colors.

Other new amenities

Throughout the Z4 cockpit, new features heighten the level of convenience and luxury, yet never diminish the new models' innate sportiness. Here are some of the key amenities:

Power side-window sealing system. Adopting a feature from 3 Series coupes and convertibles and the Z8, when a door is opened, its window (if closed) drops slightly. When the door is closed, it rises into the weather seal, for excellent sealing when the windows and top are up.

New wiper controls. The windshield wiper/washer system makes adjusting the intermittent interval more convenient than before. Speed-dependent interval adjustment is superimposed on the user's setting. For the first time in a BMW roadster, rain-sensing wipers are available.

Climate control, manual or automatic. The standard climate system is an evolution of the Z3's system, with improved controls and a new ventilation micro-filter. Automatic climate control is a new BMW roadster feature; for details see options and accessories.

Audio system, 2.5i standard. A brand-new, handsomely integrated audio system with single-disc CD player is standard. Its 10-channel amplifier feeds a 3-way front/2-way rear speaker system with a total of 10 speakers.

Premium audio system, 3.0i standard/2.5i optional. Another significant step forward, this system offers:

• Upgraded speakers throughout; the 160-mm bass speakers, made by Philips, incorporate Carver long-stroke technology, making its first appearance in a motor vehicle.
• Two subwoofers by Carver.
• A powerful Carver amplifier with 7-band Digital Sound Processing.