There is nothing like the first fire-up of an F1 car, and shortly ahead of Christmas, Mercedes has done exactly that with its W14.
Engineers and technicians gathered at the headquarters of Mercedes' power-unit facility, High Performance Powertrains in Brixworth, to listen to the system get put through its initial paces.
Mercedes has released a short video clip you can watch here, and of course, listen to the sweet sound of the W14 PU.