Mercedes has become the latest team to have trouble with its MGU-K at the start of the final pre-season test.

Following Honda's well-documented problems with an MGU-K seal during the second test, Mercedes had its running halted at lunchtime on Thursday due to an MGU-K failure. With 48 laps on the board in the morning session, Mercedes failed to add to that total as Lewis Hamilton's running was cut short.

Nico Rosberg is due to be in the car on Friday, with Hamilton again driving on Saturday. Mercedes also hit reliability issues at the start of the second test, with Hamilton withdrawing due to illness before Pascal Wehrlein's running was limited due to technical issues.

Hamilton had set an impressive time on the medium tyre early in the day, but was knocked off the top of the timing screens by Felipe Massa as the Williams became the first car to dip under the 1m24s mark at the Circuit de Catalunya courtesy of a soft tyre run.

McLaren earlier brought an end to its running on day one after just seven laps due to a hydraulic leak.

Click here for live coverage of testing from Barcelona

Driver line-ups for the final test

Click here for the gallery from day one of the final test

Keep up to date with all the F1 news via Facebook and Twitter

Andrew Lewin

Andrew first became a fan of Formula 1 during the time when Michael Schumacher and Damon Hill were stepping into the limelight after the era of Alain Prost, Nigel Mansell and Aryton Senna. He's been addicted ever since, and has been writing about the sport now for nearly a quarter of a century for a number of online news sites. He's also written professionally about GP2 (now Formula 2), GP3, IndyCar, World Rally Championship, MotoGP and NASCAR. In his other professional life, Andrew is a freelance writer, social media consultant, web developer/programmer, and digital specialist in the fields of accessibility, usability, IA, online communities and public sector procurement. He worked for many years in magazine production at Bauer Media, and for over a decade he was part of the digital media team at the UK government's communications department. Born and raised in Essex, Andrew currently lives and works in south-west London.

Recent Posts

Hamilton lifts lid on Ferrari success: ‘We’re allies rather than foes’

Twelve months ago, many questions surrounded whether Lewis Hamilton’s blockbuster move to Ferrari had gone…

5 hours ago

Alonso warns Aston Martin fans: ‘No upgrade will ever be enough’

Fernando Alonso has delivered a definitive reality check to Aston Martin fans, warning that the…

6 hours ago

Alpine on Colapinto’s future: ‘If he’s good enough, he’ll stay’

Franco Colapinto has made encouraging strides in Alpine colours during the 2026 Formula 1 season,…

8 hours ago

Pedro Rodriguez: A small stature but a massive talent

The world of motorsport was pulled out of an early summer slumber on this day…

9 hours ago

History unleashed: Norris debuts McLaren MCL-HY at Goodwood

McLaren’s future Le Mans contender – the MCL-HY Hypercar – enjoyed its very first public…

10 hours ago

Wolff: Mercedes must ‘look at ourselves’ as Ferrari threat surges

Mercedes may still sit at the head of the 2026 Formula 1 championship, but the…

11 hours ago