The 1983 Mercedes Cup, was a men's tennis tournament played on outdoor clay courts and held at the Tennis Club Weissenhof in Stuttgart, West Germany that was part of the 1983 Grand Prix circuit. It was the sixth edition of the tournament and was held from 11 July until 17 July 1983. First-seeded José Higueras won the singles title.
José Higueras defeated Heinz Günthardt, 6–1, 6–1, 7–6
Mike Bauer / 
Anand Amritraj defeated Pavel Složil / Tomáš Šmíd, 4–6, 6–3, 6–2