 The chassis was longer, with a 114-in (2.9-m) wheelbase.The "ignition key" for these cars was actually used to operate a bolt lock which, on one end, unlocked the steering column (a feature destined to return, mandated, decades later), and on the other end unblocked the ignition switch, allowing it to be operated.Starting the car was then accomplished by pressing a pushbutton on the dashboard, another feature destined to return with the advent of "smart keys".