The current Smart forfour can tow up to 1,000 kg braked. Figures below are the strongest variant in each generation — lighter trims and engines tow less.
Unbraked (no trailer brakes): 750 kg.
| Years | Braked | Unbraked |
|---|---|---|
| 2014–2020 | 1,400 | 750 |
| 2020–2022 | 1,000 | 750 |
Towing capacity is the manufacturer-rated maximum for the model's strongest variant in each generation, not an average across trims — a base engine will tow less than the figure shown. Cars with an implausible source-data towing figure relative to their own kerb weight are excluded rather than shown with a guessed correction.