Lewis Hamilton, Nico Rosberg and Niki Lauda signed 2014 F1 t-shirt, their signatures in white marker pen alongside a Mercedes-Benz F1 World Constructo

Lewis Hamilton, Nico Rosberg and Niki Lauda signed 2014 F1 t-shirt, their signatures in white marker pen alongside a Mercedes-Benz F1 World Constructors Champions WO5 Hybrid design, a silver three-pointed star emblem within victory laurels on the back, the black t-shirt by Puma, size XL Lewis Hamilton won a second World title in 2014, while Mercedes finally took its first F1 Constructers Championship with its WO5 car using the new 1.6-litre V6 turbocharged engine, the PU106A Hybrid.