| Date: | 6–13 June |
| Edition: | 39th |
| Category: | ATP World Tour 250 series |
| Draw: | 28S / 16D |
| Prize Money: | €606,520 |
| Surface: | Grass |
| Location: | Stuttgart, Germany |
| Venue: | Tennis Club Weissenhof |
| Champs: |  Dominic Thiem[1] |
| Champd: |  Marcus Daniell / Artem Sitak[2] |
The 2016 MercedesCup was a men's tennis tournament played on grass courts. It was the 39th edition of the MercedesCup, and part of the ATP World Tour 250 series of the 2016 ATP World Tour. It was held at the Tennis Club Weissenhof in Stuttgart, Germany, from 6 June until 13 June 2016. Third-seeded Dominic Thiem won the singles title.
See main article: 2016 MercedesCup – Singles.
Dominic Thiem defeated Philipp Kohlschreiber, 6–7(2–7), 6–4, 6–4See main article: 2016 MercedesCup – Doubles.
Marcus Daniell / Artem Sitak defeated Oliver Marach / 
Fabrice Martin, 6–7(4–7), 6–4, [10–8]| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Roger Federer | 3 | 1 | ||
| Marin Čilić | 10 | 2 | ||
| Austria | Dominic Thiem | 15 | 3 | |
| France | Gilles Simon | 18 | 4 | |
 Spain | Feliciano López | 23 | 5 | |
 Serbia | Viktor Troicki | 24 | 6 | |
| Philipp Kohlschreiber | 26 | 7 | ||
| France | Lucas Pouille | 31 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Evgeny Donskoy →replaced by Mikhail Youzhny Benoît Paire →replaced by 
Sam Groth| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Bob Bryan | Mike Bryan | 15 | 1 | |||
 Romania | Florin Mergea | Romania | Horia Tecău | 17 | 2 | |
| Australia | John Peers |  Brazil | Bruno Soares | 22 | 3 | |
 Poland | Łukasz Kubot | Austria | Alexander Peya | 44 | 4 |
The following pairs received wildcards into the doubles main draw:
