The 2018 FIA Formula One World Championship was the motor racing championship for Formula One cars and the 69th running of the Formula One World Championship. Formula One is recognised by the governing body of international motorsport, the Fédération Internationale de l'Automobile (FIA), as the highest class of competition for open-wheel racing cars. Drivers and teams competed in twenty-one Grands Prix for the World Drivers' and World Constructors' championship titles.

Mercedes-Benz, a German luxury automotive brand of the Mercedes-Benz Group, has been involved in Formula One as both team owner and engine manufacturer for various periods since 1954. The current Mercedes-AMG Petronas F1 Team is based in Brackley, England, and possesses a German licence. An announcement was made in December 2020 that Ineos planned to take a one third equal ownership stake alongside the Mercedes-Benz Group and Toto Wolff; this came into effect on 25 January 2022. Mercedes-branded teams are often referred to by the nickname, the "Silver Arrows".