Toto Wolff conceded Mercedes must change their car design in order to return to the top of Formula One.
Mercedes endured a dismal 2022 season, with Lewis Hamilton suffering the first winless campaign of his F1 career.
Much of their struggles were put down to issues with the car, but Mercedes stuck with their unique "zero pod" design for the 2023 season, despite the success of Red Bull's "side pod" model.
Yet after a disappointing qualification session that saw George Russell place in sixth and Hamilton in seventh for Sunday's season-opening Bahrain Grand Prix, Wolff confirmed changes will have to be made.
He said: "I don't think this package is going to be competitive, eventually.
"We gave it our best go also over the [off-season] and now we just need to all regroup, sit down with the engineers who are totally not dogmatic about anything and decide what is the development direction we want to pursue in order to be competitive to win races.
"It's not only like last year that you're scoring podiums and eventually you get there.
"I'm sure we can win races this season but it's really the mid-and long-term that we need to look at which decisions you need to take."
Wolff believes Mercedes "gave it our best shot" but ultimately the team must accept their model has not worked.
"We hit our targets. That's why we gave it our best shot," he continued. "The moment comes and the stopwatch comes out and that showed us that it's simply not good enough.
"We haven't got enough downforce and we need to find solutions to fix that."
Two-time reigning world champion Max Verstappen claimed pole position in Saturday's qualification, with team-mate Sergio Perez completing a front-row lockout for Red Bull.
Ferrari duo Charles Leclerc and Carlos Sainz will start in third and fourth respectively, while Aston Martin's Fernando Alonso occupies fifth on the grid ahead of Russell and Hamilton.
Hamilton delighted to see McLaren back on top as Norris claims maiden F1 win
Lewis Hamilton was delighted to see his former team McLaren back on top as Lando Norris claimed his first Formula One victory at the Miami Grand Prix on Sunday.
Norris raced from fifth on the grid to beat Max Verstappen by seven seconds at the Miami International Autodrome, becoming just the second driver – after Ferrari's Carlos Sainz – to overcome the three-time world champion this year.
Norris' victory made him the 21st British driver to win an F1 race but the first since George Russell took the honours at the 2022 Sao Paulo Grand Prix, while Russell's Mercedes team-mate Hamilton has not recorded a victory since the 2021 Saudi Arabian Grand Prix.
Hamilton won the first of his seven drivers' championships with McLaren in 2008, and he is pleased to see his former team challenging the dominance of Red Bull.
"I'm really happy for Lando," Hamilton told Sky Sports after the race. "I just told him he needs to stay tonight, he's got to change his flight home – he just won a race!
"It's a special moment to win your first Grand Prix. I started at McLaren and I'm really happy to see them back at the top. It's been a long time."
McLaren are third in the constructors' championship standings with 124 points through six races of the season, 63 behind Ferrari in second and 60 clear of fourth-placed Mercedes.
A gap of over 18 seconds separated the two Silver Arrows on Sunday as Russell finished eighth, two places behind Hamilton, and he was at a loss to explain his lack of pace.
"I don't think it caught us off guard. I just had no pace at all. It was just a lot worse than expected," Russell said.
"My race pace has been pretty strong this year but compared to Lewis I was nowhere. We need to check and see what happened and go from there.
"We lost even more points but as I said yesterday, we know where we are as a team. We're a long way from where we want to be."
Verstappen says Norris is destined for more wins following Miami triumph
Max Verstappen believes Lando Norris' victory at the Miami Grand Prix will not be his last in Formula One, having been unable to match the McLaren star's pace in Florida.
Norris took his maiden F1 victory at the Miami International Autodrome, racing from fifth on the grid to finish seven seconds clear of three-time world champion Verstappen.
Verstappen started on pole but struggled to match Norris' pace on the hard tyres as he failed to win a race for just the second time this season.
The Red Bull driver has four victories in six outings in 2024, having retired at the Australian Grand Prix in March as Ferrari's Carlos Sainz took the spoils.
Speaking after Sunday's race, Verstappen said: "You win, you lose. We're all used to that in racing, right? Today was a bit tricky.
"I think already on the medium tyres it didn't feel fantastic, we were pulling away but not like it should be. Then once we made a pit stop I heard the lap times McLaren were doing and I was like, 'Well, that's pretty quick!'
"Once they also switched onto the hard tyre, they just had more pace, especially Lando – he was flying. It was incredibly difficult for us on that stint, but if a bad day is P2 I'll take it.
"I'm very happy for Lando, it's been a long time coming and it's not going to be his last one, so he definitely deserves it today."
Some have suggested McLaren may be the most likely team to challenge Red Bull's dominance this year, having arrived in Miami with a raft of upgrades to their MCL38 car.
Asked whether Sunday's race was a true representation of McLaren's pace, Verstappen said: "I hope not!
"They came with an upgrade, for sure it looks like it works so we have a bit of work to do from our side.
"I think it definitely wasn't our strongest weekend in terms of race pace, but we'll analyse it all and try to come back stronger."
Norris celebrates first-ever Formula 1 win in Miami Grand Prix
Lando Norris said it was “about time” after he claimed his maiden Formula 1 victory in the Miami Grand Prix on Sunday.
The 24-year-old started the race in fifth but took the chequered flag with a seven-second advantage over Max Verstappen, who had taken pole position.
Norris capitalised with a timely pit stop behind the safety car following a crash between Kevin Magnussen and Logan Sargeant, who was unable to finish the race.
Verstappen had led for the first 29 laps despite missing the chicane on lap 21 and hitting a bollard, but when the race restarted with 27 remaining, he struggled to keep pace with Norris, who was the quickest car on the track.
Charles Leclerc rounded out the podium, pipping his Ferrari team-mate Carlos Sainz to third, with Sergio Perez just beating Lewis Hamilton to a top-five finish.
After getting his first win in his 110th F1 race, Norris was quick to praise his team for their hard work in the process.
Speaking to Sky Sports, he said: "About time! What a race. It's been a long time coming. Finally, I've managed to do it.
"I'm so happy for my whole team. I finally delivered for them. Long day, tough race. Finally, on top, so I'm over the moon.
"Thanks to McLaren, everyone. I'll give a shout-out to my mum and dad, of course.
"I'm just proud. A lot of people doubted me along the way. I've made a lot of mistakes over my last five years in my short career, but today we put it altogether.
"This is all for the team. I stuck with McLaren because I could believe in them and do believe in them. Today we proved exactly that."
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