Complex sentence: The E-class are three-section, four-bogie articulated trams built by Bombardier Transportation's Dandenong factory, with the propulsion systems and bogies coming from Bombardier's Mannheim and Siegen factories in Germany.
Split into simpler sentences: The E-class are three-section, four-bogie articulated trams built at Bombardier Transportation's Dandenong factory. The propulsion systems and bogies were imported from Bombardier's Mannheim and Siegen factories in Germany.