Complex sentence: Under the guidance of chief designer Claus Luthe, BMW based much of the design on the E32 7 Series, and following Spada's departure from BMW in 1983, J Mays finalized the design for production in mid- 1985.
Split into simpler sentences: Under the guidance of chief designer Claus Luthe, BMW based much of the design on the E32 7 Series. Following Spada's departure from BMW in 1983, J Mays finalized the design for production in mid- 1985.