Mercedes ran a new nose featuring an S-duct at the final day of the first week of pre-season testing.
The W07 Hybrid was launched on Monday with last year's nose and front wing and completed the first three days at the Circuit de Catalunya with that configuration. New slatted barge boards and a raked leading edge of the floor were added on Tuesday -- referred to by the team as "Floor W" -- before the new nose emerged on Thursday.
The design features an S-duct, as seen on other cars in recent years, with a slot under the nose feeding air to the top of the car and an exit just after the driver's number. Mercedes first experimented with an S-duct at the Brazilian Grand Prix last year, but it did not race.
Mercedes' new nose makes its first appearance. You should be able to see the slots for the new S-duct #F1 pic.twitter.com/nYN3HvaLUQ
— Laurence Edmondson (@EdmondsonESPNF1) February 25, 2016
The new design also features a slightly raised nose and much smaller mounting points for the front wing. Changes to the front wing itself have also been made.