Mercedes caught the eye on the first day of in-season testing at Barcelona on Tuesday when they ran the W09 with two new rain lights on their car's rear wing.
Lewis Hamilton was at the wheel of the W09 when the team debuted the fresh look.
"This is just a trial light set-up for better visibility in the rain," Mercedes explained.
Hamilton completed the equivalent of two full race distances before handing over the W09 to team-mate Valtteri Bottas for the second and final day of running on Wednesday.
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Barcelona Test driver line-ups
|
Tuesday, May 15 |
Wednesday, May 16 |
| Mercedes |
Lewis Hamilton |
Valtteri Bottas |
| Ferrari |
Sebastian Vettel |
Antonio Giovinazzi |
| Red Bull |
Max Verstappen |
Jake Dennis |
| Renault |
Carlos Sainz |
Jack Aitken |
| McLaren |
Stoffel Vandoorne |
Lando Norris |
| McLaren Pirelli tyre test |
Lando Norris/Oliver Turvey |
Stoffel Vandoorne |
| Haas |
Romain Grosjean |
TBC |
| Force India |
Nicholas Latifi |
Nikita Mazepin |
| Force India Pirelli tyre test |
George Russell |
Nicholas Latifi |
| Toro Rosso |
Sean Gelael |
Pierre Gasly |
| Sauber |
Antonio Giovinazzi |
Charles Leclerc |
| Williams |
Oliver Rowland |
Robert Kubica |
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