Complex sentence: At the 2013 Detroit Auto Show, Volkswagen revealed the Volkswagen Crossblue Concept SUV, which Volkswagen plans to have it replace the slow selling Routan by 2015.
Split into simpler sentences: At the 2013 Detroit Auto Show, Volkswagen revealed the Volkswagen Crossblue Concept SUV. Which Volkswagen plans to have it replace the slow selling Routan by 2015.