Rosberg to test new Mercedes W04 before Hamilton 17 January, 2013 Nico Rosberg, not team newcomer Lewis Hamilton, will give Mercedes’ 2013 single seater – designated the W04 – its track debut at Jerez early next month. The German squad announced on Thursday that the new car will be launched at Jerez on February 4th. On that same day – the day before official winter test action begins at Jerez – Rosberg will give the car its ‘shakedown’ debut, Germany’s Auto Motor und Sport reports. The short 100 kilometre test will take place with demonstration Pirelli tyres, the report added. (GMM) Subbed by AJN.