Manettino dials are a part of some modern Ferrari cars (from Ferrari F430 in 2004). These adjustment dials are mounted on the steering wheel, usually just underneath the center of the wheel. The Manettino (Italian: little lever) is inspired by the controls found on F1 steering wheels, but have a more polished appearance.
The dial allows for the quick and simple adjustment of the electronics governing suspension settings, traction control, electronic differential, and change speed of electronic gearbox.
A similar control system was employed on the Ferrari Enzo, but used individual buttons for different settings rather than a single rotary switch.