Drivers Lewis Hamilton and Valtteri Bottas It was in contrast to main rival Ferrari, which had a low-key week at Barcelona that was not helped when Sebastian Vettel suffered an engine problem on the final morning of the test.
But while Mercedes appeared to run without drama, Motorsport.com has learned that the electrical problems that stopped Bottas on the second day of testing were more terminal than original indicated. In fact, the power unit itself was broken and had to be replaced.
“[There's] lots going on in Brixworth, lots of improvements across the whole power unit, on the ERS side, on the internal combustion engine side," said Cowell.“As ever, [we're] fighting a few little issues as we pull everything together.
“So lots of work going into building the right spec, getting it long-runned, and then providing power units to the teams so that they can fire up their cars.”
Williams rookie Nicholas Latifi also lost track time on Friday when his Mercedes power unit required changing.
Looking at the distance covered per manufacturer, Honda had an impressive start to testing…
Laps per power unit
| Mercedes |
| Ferrari |
| Honda |
| Renault |
F1 teams are limited to using three engines for the entire season, which means each power unit has to cover thousands of kilometres.
Last year, Motorsport.com revealed just how far a typical Mercedes component had covered as Hamilton rounded off the season at the Abu Dhabi Grand Prix.
Internal Combustion Engine