February 5, 2013

Martin Whitmarsh jokes with Sergio Perez in the paddock

© Sutton Images

February 5, 2013

Martin Whitmarsh deep in thought on the first day of testing

© Sutton Images

February 5, 2013

Jenson Button leaves the pit lane in the MP4-28

© Getty Images

February 5, 2013

Jenson Button aims for an apex in the MP4-28

© Sutton Images

February 5, 2013

Jenson Button and Sam Michael watch on after the MP4-28 had stopped out on track

© Sutton Images

February 5, 2013

Sergio Perez watches on from the McLaren pit wall

© Sutton Images

February 5, 2013

Jenson Button helps McLaren cover the MP4-27 after stopping on track

© Sutton Images

February 5, 2013

Jenson Button is wheeled back in to the McLaren garage

© Sutton Images