Complex sentence: The Aston Martin Cygnet is a 2 +2 marketed by Aston Martin since 2011 as a rebadged variant of the Toyota iQ, which was created to enable Aston Martin to comply with the European Union-imposed fleet average emissions regulations taking effect in 2012.
Split into simpler sentences: The Aston Martin Cygnet is a 2 +2 marketed by Aston Martin beginning with model year 2011 as a rebadged variant of the Toyota iQ. The Cygnet enables Aston Martin to comply with the European Union-imposed fleet average emissions regulations taking effect in 2012.