Wolff vows Mercedes 'digging deep' to solve repeat power unit failures

Mercedes team principal Toto Wolff has promised his team is "really digging deep" to stamp out a worrying pattern of power unit failures that resurfaced at the Spanish Grand Prix, robbing Kimi Antonelli of a near-certain podium finish with just five laps to run.

Why it matters:

Reliability is becoming a pressing concern for Mercedes and its customer teams at a crucial stage of the season. With Antonelli, George Russell, and McLaren's Lando Norris all suffering sudden battery-related retirements in recent rounds, these recurring electrical failures risk derailing championship bids and eroding trust in the power unit as the summer stretch approaches.

The details:

• Antonelli was running second in Barcelona after a skillful overtake on his teammate when his car lost all power exiting Turn 5. Wolff noted the failure appeared battery-related but insisted the underlying causes have varied across incidents, including separate engine issues that sidelined both McLarens in China and a gearbox problem for Norris in Canada.
• The teenage championship leader said he received no warning from the cockpit before the car simply switched off. He attempted a full system reboot in hopes of returning to the race, but the failure proved terminal.
• Despite losing a significant haul of points, Antonelli remains atop the drivers' standings, though his buffer has shrunk from 41 points to just 25 after Lewis Hamilton secured his maiden victory for Ferrari.

What's next:

Mercedes' High Performance Powertrains division is under the gun to isolate and fix the gremlin before it inflicts more damage across the works and customer entries. With the championship margin narrowing, Antonelli cannot afford another reliability setback if he hopes to defend his lead against a resurgent Ferrari and the chasing pack.