A lot has been said and written about the altitude at which the races are held in Mexico. Because of the thin air the engines have to endure much more and every team has its own way of dealing with that. You can clearly see that the different teams drive with different rear ends.
It's very important to ensure the engine is properly cooled due to the extra load (compared to 'normal' Grands Prix). Red Bull Racing 's cooling configuration at the Autodromo Hermanos Rodriquez Circuit seems to be quite different to that of the Mercedes-powered cars. Which formation is right? We'll find out on Saturday and Sunday.