Simplify the following text for a Grade 6 native English-speaking person.
Original: The Audi 100 and Audi 200 are mid-sized automobiles manufactured for model years 1968-1994 by Audi , a division of the Volkswagen Group . The C3 model of the Audi 100 was sold in the United States as the Audi 5000 until 1988 .
Simplified: The Audi 100 is a automobile from Audi , introduced in 1968 .