Engine Start/Stop button (also called push-button start or keyless ignition button)
These are the circular metal buttons shown in the image. They are the ignition controls used in most modern cars and SUVs that have keyless entry / push-button start systems.
How they work
Press once (with the brake pedal pressed and the key fob inside the vehicle) → engine starts.
Press again while the engine is running → engine stops.
The raised or engraved text typically reads:
ENGINE
START
STOP
(or a close variation).
They are usually illuminated (often with a green or amber ring) when the vehicle is ready to start, and they sit on the dashboard or center console.