WATCH: What actually happens AFTER an F1 seat fitting?

Pre-season in Formula 1 is a busy time for teams and drivers as they prepare for the new campaign and pour all their hopes into their new machine.

One crucial aspect of that is doing the seat fit for the driver to ensure they are comfortable and relaxed in the new car - but most importantly, safe and well-protected.

Seat fits themselves are well-known, but do you know what actually happens AFTER the driver has been moulded and the team get to work?

If not, no fear, Mercedes - and a familiar face - are to explain all...