It began on 2 April at Circuit Paul Ricard and finished on 23 October at Hockenheim after 21 races at nine meetings.
Merhi's compatriot and teammate Daniel Juncadella scored four races victories and managed third in drivers' standing.
Best rookie of the season Nigel Melker took fourth place with four victories despite missing round Silverstone due to commitments in GP3 Series.
Motopark's drivers Jimmy Eriksson and Kimiya Sato finished on ninth and tenth positions respectively.
Competition numbers 30 and higher are single-race entrants and are ineligible to score championship points.