The sDrive35is has a neat trick called Overboost that allows the turbocharged engine to temporarily increase its boost pressure under full throttle, bumping up the peak torque to 369 pound-feet for a short burst of acceleration.
All of the controls -- the shifter, the steering-wheel buttons, the HVAC buttons -- are easy to reach, wrapping around the driver's seat. The iDrive controller is placed a bit far back and it's awkward to reach, but you won't want to go fiddling with it when corner carving anyway.
The center console is home to the odd BMW shifter, the iDrive controller, and the Drive Experience Selector. There's also an awkward cupholder that intrudes into the passenger's leg room, but that can be quickly removed with a tug.
Instrumentation is a simple bi-gauge setup: speedo on the left, tach on the right. Between them is a small monochromatic LCD trip computer. Although the Z4 features BMW's EfficientDynamics regenerative braking, the roadster does not feature a brake-regen gauge.
Dual-zone, automatic climate control on a two-seat roadster seems like overkill, but the Z4 has it. The Z4 also has a dedicated button on the steering wheel to change the recirculation mode. Why? We don't know.
Destinations found online include a small Google Maps preview of their locations. However, navigation is still handled by the onboard iDrive system, not the Google Maps navigation you'll find on your smartphone.
Available audio sources include Bluetooth for hands-free calling and audio streaming, a 3.5mm analog auxiliary input, CD/DVD playback, satellite radio, and AM/FM radio with HD Radio decoding. There's also a bit of hard-drive space dedicated to ripping music from audio CDs.