At the 2015 United States Grand Prix, the MR03B featured a further revised livery – adding the stars and the stripes from the flag of the United States  – and a new sponsor Coupons.com, which was introduced with Rossi on his third race for the team. Rossi replaced Merhi for five out of the last seven races of the season, competing in the races that did not clash with his main campaign, in the GP2 Series.