Upon first sight, the P1 GTR steering wheel looks the same on all cars, but there are a number of key differences between the track only versions, and road legal versions.
The Track Only Version
On the track only P1 GTR, the removable steering wheel not only works as a way to turn the wheels, it's also used as a key to the car.
But what do all the buttons and switches do? Let's start with the two switche toggles in the middle. Both switches feature three options. The left hand switch controls the electronic stability control (ESP), while the right hand switch controls the handling controls. The holding down the top left button on the steering wheel labelled 'DRS' enables the drag reduction system, which tilts the rear wing to gain faster straight line speed. The top right button labelled 'IPAS' enables the instant power assist system when held down. The yellow button labelled 'PIT' enables a pit limiter of 30mph, while the green button labelled 'PIT' enables radio communication between the driver and the pit crew. The blue switch labelled 'RAIN' lights up the two powerful LED lights at the rear for use when there is heavy rain. Thre red button labelled 'NEUTRAL' put the car into neutral, rather than being in the centre console as it is in the regular P1. The button underneath the left switch toggle labelled 'LAUNCH' engages launch control, while the button to the right of it labelled 'BOOST' gives the car full engine and electric power. The green butoon labelled 'E-MODE' turns off the V8 engine to drive the car on full electric power, while the button next to it labelled 'CHARGE' quickly charges the electric motor. The button on the bottom right labelled 'START ENGINE STOP' turns on the ignition with one click, and turns on the engine with the second click.
The Road Legal Version
There are a number of minor changes on the steering wheel for the road converted P1 GTR. First of all, an 'ACTIVE' button is added above the ESP and handling switches. The yellow 'PIT' switch has been changed to 'HORN' to meet road regulations, and the 'RAIN' switch has been changed to an 'AUX' button. Other than that, the steering wheel has been relatively unchanged, with changes made by TE Systems for Lanzante.