Complex sentence: The Volkswagen Corrado is a 2 door, 4 passenger compact sports car developed by Volkswagen and built by Karmann in Osnabrück, Germany on Volkswagen's A3 platform, which it shared with the then-current Golf/GTI and Jetta.
Split into simpler sentences: The Volkswagen Corrado is a 2-door, 4-passenger compact sports car developed by Volkswagen and built by Karmann in Osnabrück, Germany. It used Volkswagen's A3 platform, which it shared with the then-current Golf/GTI and Jetta.