Mercedes tested a version of its passive DRS during opening practice for the German Grand Prix.
With teams particularly eager to get it ready for some of the tracks coming up on the calendar, especially Spa-Francorchamps, Mercedes has followed the example of Lotus and brought it in to action. The device was fitted to the rear of Nico Rosberg's car during the opening part of FP1 at the Nurburgring, before being removed.
Mercedes had initially planned to experiment with its passive DRS during the forthcoming young driver test at Silverstone, but its ban from that event has meant it has had to reshuffle its development plans. Lotus raced it passive DRS for the first time at the British Grand Prix, and the team is continuing its work with it at this weekend's Nurburgring race.
The passive DRS provides a straight-line speed boost through stalling the rear wing, and can be a valuable tool in the race when battling against cars that are unable to activate their overtaking device.