Mercedes: These things happen and it's all part of testing 6 February, 2013 Lewis Hamilton Mercedes W04 Lewis Hamilton’s first day of testing for Mercedes AMG Petronas was brought to an early conclusion today by a technical problem on the F1 W04. Lewis completed 15 laps this morning before suffering a loss of rear brake pressure The front brakes enabled him to slow the car however he could not avoid hitting the barrier The problem was traced to the hydraulic brake line connecting to the right-rear calliper The team did not go out for the remainder of the day as work continued to complete the required repairs Lewis Hamilton: We had a good start but then unfortunately we had a failure which brought our day to an early end. These things happen and it’s all part of testing. Of course, it’s better that we get these small issues out of the way sooner rather than later, and the guys are working really hard to overcome them. From the few short laps that I completed this morning, my general feeling was very positive. I got a good understanding of where the base of the car is and, whilst we need to do work in certain areas, it was good to have some laps to get a feel for what those areas are. I’ve told the guys that we just need to keep pushing and I know that we all will be doing that. Nico Rosberg will be back at the wheel of the F1 W04 tomorrow for the third day of the test. Content on GrandPrix247.com by: staff & contributors, Reuters syndication, GMM service, Getty Images, Formula 1 teams, sponsors & organisations.