The phrase "Press the start button" is correct and usable in written English.
You can use it in a variety of contexts when referring to activating something with a start button. For example, in a instruction manual for a blender, you might include the sentence "Press the start button to begin blending."
Press the Start button and the V-8 quietly whirs to life.
You just put your foot on the brake and press the start button.
Once you have it dialed in, press the start button and a countdown timer will tell you when to get out of the sun with a piercing beep.
But as smartphone sales have exploded (they passed those of PCs three years ago), followed by tablets, the need to press the "Start" button has stopped.
In practice, however, some machine tools designated as automatic are actually semi-automatic, since they require an operator to load the workpiece into the machine, press the start button, and unload the part when the operation is completed.
Fortunately, the A6 is just like the A8 in another regard: once you hop inside and press the start button, the Audi demands high placement on any midluxury shopping list.
When you press the Start button on the included remote control (not to be confused with the Start button on the screen), the PC ducks into a phone booth and emerges moments later as Media Machine.
Those details extend inside: press the "start" button and the metallic vent covers pivot open while a rotary shift knob rises from the center console like the Armageddon button in a James Bond movie.
But all these nits disappear when you turn the key -- or, in the case of my test car, which had the Keyless Go option, press the "start" button atop the shifter.
Press the start button and watch the gauges illuminate.
Press the start button on the controller when you are ready.
