Mercedes employed a rapid‑reaction pit stop to claim Kimi Antonelli’s win at the Spanish Grand Prix, a manoeuvre that rested on a pre‑planned code system created by trackside engineering director Andrew Shovlin.
Mercedes Prepares Drivers for Safety‑Car Windows
At the season‑opening race in Spain, the team reviewed every possible crash scenario on Sunday morning, noting how a sudden VSC could shift the ideal pit entry timing for a driver. The goal, according to Shovlin, was for “every single stage of the race you know what you’re doing” if a VSC or safety car is called.
When Lance Stroll’s Aston Martin stopped on the running line, traffic slowed to yellow‑flag speed. Antonelli was in the lane at turns 18‑20, a position that placed him just outside the typical safety‑car window. The race engineer, Peter Bonnington, sent a series of concise instructions that, according to Shovlin, operated under a set of secret codes updated constantly “every single week.”
Secret Codes and Real‑Time Decisions
Bonnington’s first message read: “Yellow, yellow, 19‑20,” followed by “So, a big lift.” He then told the driver: “You are in safety‑car window.” With the VSC activated only 35 seconds after the initial yellow flag, the limit for a pit entry without penalty surged, so Antonelli slowed deliberately to avoid a late‑arrival penalty.
The coded instructions — whose exact wording remains undisclosed — allowed the driver to gauge whether to enter the pits before or after the VSC became active. By slowing in the yellow zone and delaying throttle use when the green flag reappeared, Antonelli positioned himself to hit the pit entry precisely as the virtual safety car was deployed.
A Swift Pit Stop That Won the Race
Mercedes had double‑stacked tyres for Antonelli and teammate George Russell, ready to change within the 15 seconds that elapsed from the VSC call to Antonelli’s arrival at the pit box. The crew executed the stop in the time frame delineated by the pre‑session plan, avoiding penalties and delivering a championship‑level response.
The combination of pre‑race preparation, real‑time coded communication, and a coordinated pit crew resulted in a flawless pit stop that proved decisive for Kimi Antonelli’s victory at the Spanish Grand Prix.

