| Date | Wednesday 22 February 2012 |
| Track | Circuit de Catalunya |
| Driver | Nico Rosberg |
| No of Laps | 82 laps |
| Best Lap Time | 1:24.555 |
| Kms Covered | 382 kms |
| Track Length | 4.655 km |
| F1 W03 Mileage | 1164 km |
| Weather | Cool & sunny |
Nico Rosberg was at the wheel of the MERCEDES AMG PETRONAS F1 W03 car at the Circuit de Catalunya in Barcelona today.
- A productive morning session allowed the team to make good progress through the planned technical programme
- A transmission oil leak was found early in the afternoon which could not be resolved in time to complete any productive running
- Nico completed 82 laps today, adding a further 382 km to take the F1 W03’s total mileage to 1164 km
Michael will be back in the car tomorrow before Nico finishes the test programme on Friday.
Nico Rosberg “It was good to get into proper testing today. Early in the morning, it was a bit too cold on the track to collect some decent information, however later we were able to get into our planned work. In the afternoon session, unfortunately we had a transmission oil leak which meant that I wasn’t able to complete any further running. That doesn’t affect my positive feelings about our test programme, and things like that can happen in the early stages of running a new car. Now I am looking forward to driving again on Friday.”
TIMES
| Pos | Driver | Car | Time | Laps |
| 1. | Nico Hulkenberg | Force India | 1:22.608 | 112 |
| 2. | Sergio Perez | Sauber | 1:22.648 | 85 |
| 3. | Sebastian Vettel | Red Bull | 1:22.891 | 104 |
| 4. | Fernando Alonso | Ferrari | 1:23.180 | 87 |
| 5. | Daniel Ricciardo | Toro Rosso | 1:23.639 | 49 |
| 6. | Lewis Hamilton | McLaren | 1:23.806 | 121 |
| 7. | Nico Rosberg | MERCEDES AMG PETRONAS | 1:24.555 | 82 |
| 8. | Valtteri Bottas | Williams | 1:25.738 | 117 |
| 9. | Vitaly Petrov | Caterham | 1:26.605 | 69 |
| 10. | Charles Pic | Marussia | 1:27.343 | 109 |
