08-02-2013, 14:50 
		
	
	
		Craig Scarborough @ScarbsF1  1h  
Mercedes testing a Drag Reduction Device, note the duct under the rear and the roll hoop inlet is back pic.twitter.com/AFK7I03O via @Difd_11
	
	
	
	
Mercedes testing a Drag Reduction Device, note the duct under the rear and the roll hoop inlet is back pic.twitter.com/AFK7I03O via @Difd_11

