Mercedes tried out a new steering innovation at pre-season testing in Barcelona on Thursday, insisting the device fell within Formula 1's stringent technical rules.
On-board camera footage showed world champion Lewis Hamilton moving the steering wheel towards him as he enters a straight, changing the angle of the front wheels, before pushing the steering wheel away from him at the next corner.
F1 cars traditionally are set up with the front wheels slightly angled to help cornering.
Mercedes' technical director James Allison said the so-called dual axis steering system was above board.
Allison commented after the morning session on the second day of testing: "We've spoken to them (F1's governing body the FIA). The rules are clear about what's permitted on steering systems. We're pretty confident that it matches those requirements."
According to the Mercedes tech guru, the innovation "introduces an extra dimension for steering which we hope will be useful", but he avoided elaborating on its potential benefits.
For the record
Hamilton, aiming at equalling Michael Schumacher's record of seven world titles this year, was enthusiastic.
He said: "For me it's really encouraging to see that my team is continuing to innovate and stay ahead of the game, and I think that's down to the great minds in the team and so hopefully that'll work to our benefit. I've only tried it this morning and we're trying to get on top of it, understand it, but safety wise no problem today and the FIA are OK with the project."
On the second of three days testing at the Circuit de Catalunya, Kimi Raikkonen posted the quickest time of 1min 17.091sec in his Alfa Romeo.
Sergio Perez (1:17.347) came next in the time sheet ahead of the Renault of Daniel Ricciardo (1:17.749).
Hamilton was only ninth fastest on the day, but he still held the quickest time so far after his 1:16.976 on Wednesday.
Testing times are impossible to place in any meaningful context with car set ups and fuel loads and tyres all playing an important part in the car's speed.