Complex sentence: This continued until 2006 with the launch of the fourth and final generation Commodore, which employed an Australian developed sedan body style, the range expanded in 1979 to include a station wagon.
Split into simpler sentences: This continued until 2006 with the launch of the fourth and final generation Commodore, which employed an Australian developed platform. Initially introduced as a single sedan body style, the range expanded in 1979 to include a station wagon.