Did Mercedes Just Unleash F1’s 2026 Secret Weapon?

Mercedes’ first public run with the W17 at Silverstone was always going to be heavy on optics and light on hard answers. A filming day in January, on a cold, wet track, tells you almost nothing about lap time and plenty about whether the basics work. Still, there were a couple of tells worth clocking — not least from George Russell, who sounded quietly energised by what’s going on at Brixworth.

The team rolled the covers off its 2026 car via renders on Thursday, then put it on track at Silverstone for the first mileage ahead of next week’s private running in Spain. With filming-day limits capping Mercedes at 200 kilometres, Russell and Kimi Antonelli split the work and logged 67 laps between them.

Mercedes’ head of trackside engineering Andrew Shovlin described it as a “sensible first day of running”, the kind of line you get when the priority is to get to the end of the day without the laptop screens turning red. The aim, he said, was simply to make sure everything “operates safely and reliably”, with both drivers getting their first feel of the new-generation machinery.

There was, however, a bit more colour from Russell than you usually get on a day like this. In a short clip shared by the team, he made a point of talking about the new engine as much as the new car.

“It’s mega to see the new car, new engine on track,” Russell said. “It sounds amazing. It really sounds different to what I was expecting.

“It’s a really special day, getting to drive it for the first time, because this engine and power unit has been years in the works… and then finally getting the chance to drive today is always a really nice time of year.

“So yeah, great to be out. Great to see it on the track, and can’t wait to drive it full gas.”

That’s not the language of someone simply ticking off a marketing obligation. It’s also an interesting emphasis given the noise already building around the 2026 power unit landscape. Paddock talk has been pointing in Mercedes’ direction for a while, and Russell is now being tipped by plenty of observers as a genuine title favourite if the team has, as rumoured, landed this rules reset strongly.

Antonelli, for his part, played the moment in a more straightforward key — grateful, upbeat, and very aware it’s still early days. But even that matters. This is only his second “first day” in a new Formula 1 car, and Mercedes clearly wants him bedding in quickly as the calendar marches toward a season that will reward teams who hit the ground running.

“First day in the new car, super big day for the team, for everyone involved in the project,” Antonelli said. “And I have to say it was a good day. I’m super happy.

“A massive thanks to all the people back in Brackley and Brixworth… this [is] just the beginning and really looking forward to the next few tests… and then, of course, to the start of the season.”

It’s also hard to ignore the subplot hanging over all of this: the reports that Mercedes — alongside Red Bull Ford — may have found a grey area in the new engine regulations around compression ratios. The figure is set at 16:1, but is measured at ambient temperatures, and not rechecked during competition. The suggestion is that there’s a way to effectively increase the ratio when the engine is running, which would bring more power and better efficiency. The figure being whispered around is up to four tenths of a second per lap — a number that would be seismic if it proved real-world repeatable.

Mercedes, naturally, isn’t going to bite on that in public, and a damp filming day won’t validate it anyway. But Russell’s decision to single out the engine, and to do it with that kind of enthusiasm, will only add oxygen to the debate. Drivers don’t usually volunteer “it sounds different to what I was expecting” unless there’s something genuinely new to feel — or hear — back there.

If Thursday was about making sure the W17 basically behaves, the next steps are where the meaningful work starts. Mercedes will be back on track in Barcelona for the behind-closed-doors outing, with teams limited to a maximum of three days’ running across the five-day window from January 26–30. After that come the two Bahrain tests on February 11–13 and February 18–20, before the 2026 season begins with the Australian Grand Prix on March 8.

For now, Mercedes will take what it can get: clean mileage, two drivers smiling, and a lead driver who sounds like he’s itching to turn the dial from “filming day” to “full gas”.