Holden Commodore Speed Alert Easter Egg - Holden Commodore Speed Alert

Many Holden Commodore's (Australian Automobile) mode since the 90's come with an electronic "speed alert" unit. It goes beep and flases a high brightness LED if you exceed the preselected speed. I'ts designed to let you know when you're speeding.

If you press and hold the up and down buttons just before starting the vehicle (let them go after the engine is running), the usual pre-set speed point on the LCD display is replaced by a real-time digital speedomiter readout. You can compre the digital readout with the analogue speedo in realtime.