1985 Mercedes Cup
| 1985 Mercedes Cup | |
|---|---|
| Date | 9–15 September |
| Edition | 8th |
| Draw | 32S / 16D |
| Prize money | $100,000 |
| Surface | Clay / outdoor |
| Location | Stuttgart, West Germany |
| Venue | Tennis Club Weissenhof |
| Champions | |
| Singles | |
 Ivan Lendl [1] | |
| Doubles | |
| Ivan Lendl / Tomáš Šmíd [2] | |
The 1985 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 1985 Grand Prix circuit. It was the eighth edition of the tournament and was held from 9 September until 15 September 1985. First-seeded Ivan Lendl won the singles title.
Finals
Singles
Ivan Lendl defeated 
Brad Gilbert, 6–4, 6–0
- It was Lendl's 7th singles title of the year and the 49th of his career.
Doubles
Ivan Lendl / Tomáš Šmíd defeated Andy Kohlberg / 
João Soares, 3–6, 6–4, 6–2