Mercedes, along with customer teams Racing Point and Williams, will run a new phase power unit at this weekend’s Formula 1 Belgian Grand Prix.
It is the second substantial update for Mercedes this season, after bringing its previous specification to the Canadian Grand Prix in June.
Mercedes boss Toto Wolff revealed earlier in the week that staff at its Brixworth factory had been working through the summer break in order to find gains, and they have been brought to Spa-Francorchamps.
“Works teams and customers planned to run a new phase PU, barring any unexpected surprises between now and practice,” confirmed a Mercedes spokesperson.
“Testing at the factory has shown improved performance and reliability.”
Mercedes, along with Williams, are within their allocation of components for 2019 but Racing Point’s Lance Stroll is poised for a grid drop; he was left out-of-sequence in the wake of the failure he suffered during practice in Canada.
Mercedes is the second manufacturer to bring an engine update to this weekend’s Belgian Grand Prix, with Honda fitting Spec 4 to Alexander Albon’s Red Bull and Daniil Kvyat’s Toro Rosso.
It means both drivers will take on a grid penalty.
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