Coulthard's McLaren team-mate Kimi Raikkonen, who started from the back of the grid following an engine failure in qualifying, scored his first point of the season.
Pastor Maldonado qualified 17th for Williams but joins Barrichello at the back after he received a 10-place grid penalty for taking a ninth new engine - one more than the eight allocated to each driver for the season.
The Green Book, produced by the American Council for an Energy-Efficient Economy (ACEEE), says that in evaluating plug-in hybrids, it considers both the emissions from the gas engine and from the power plants that feed the grid.