Mercedes’ hidden qualifying trick: audio cue helps drivers maximize electric power. How Mercedes uses an acoustic signal to optimize power unit performance.

Mercedes has introduced an innovative battery management system that helps Andrea Kimi Antonelli and George Russell optimize electric power deployment during qualifying laps. The strategy, which relies on a simple audio signal delivered directly to the drivers, has emerged as one of the team’s most intriguing technical solutions at the British Grand Prix.

Drivers lift off the throttle to gain performance

During Friday’s running at Silverstone, it became clear that Andrea Kimi Antonelli and George Russell were suddenly lifting off the throttle just before crossing the start-finish line on their qualifying laps. At first glance, the maneuver looked unusual and even counterintuitive, but it was actually part of Mercedes’ bold—yet fully legal—approach to managing the electric power unit.

By briefly lifting off the accelerator at exactly the right moment, both drivers were able to keep maximum electrical power available for longer, avoiding the mandatory 50 kW-per-second power reduction required by the regulations.

The advantage became even more apparent during Saturday’s qualifying session. On the lap that secured pole position, Andrea Kimi Antonelli benefited from an additional burst of electric power, allowing him to carry 11 km/h more speed than Charles Leclerc on the exit of Silverstone’s final chicane.

Mercedes engine trick: audio assistance from the pit wall

Activating this battery deployment strategy must still be initiated by the driver, ensuring that it complies with the FIA regulations requiring a “negative driver request” before the system can respond.

However, according to The Race, Mercedes has developed a clever support system in which Andrea Kimi Antonelli and George Russell receive an audio signal through their earpieces whenever the battery reaches a pre-defined charge level above 0%.

As soon as they hear the tone, the drivers immediately lift off the throttle for an instant. The concept is similar to the shift lights that indicate the ideal moment to change gear, but instead it guides the driver on precisely when to trigger the battery management sequence.

The procedure was first validated in Mercedes’ simulator before being introduced on track at Silverstone, where it reportedly delivered highly encouraging results.