# Driver Assists (assistRules.json) (/docs/assetto-corsa-competizione/assists)



`assistRules.json` sets the **maximum** driver aids allowed on your server. Players can use less assistance than the cap, but never more — so this is how you set the difficulty/realism level of your grid.

```json
{
    "stabilityControlLevelMax": 0,
    "disableAutosteer": 1,
    "disableAutoLights": 0,
    "disableAutoWiper": 0,
    "disableAutoEngineStart": 0,
    "disableAutoPitLimiter": 0,
    "disableAutoGear": 0,
    "disableAutoClutch": 0,
    "disableIdealLine": 0
}
```

Key fields [#key-fields]

| Field                                                              | Meaning                                                   |
| ------------------------------------------------------------------ | --------------------------------------------------------- |
| `stabilityControlLevelMax`                                         | Max stability control %, `0` = none allowed (sim-grade)   |
| `disableAutosteer`                                                 | `1` = ban auto-steer (recommended for any serious server) |
| `disableAutoGear`                                                  | `1` = force manual shifting                               |
| `disableAutoClutch`                                                | `1` = force manual clutch                                 |
| `disableIdealLine`                                                 | `1` = hide the racing-line helper                         |
| `disableAutoLights` / `disableAutoWiper` / `disableAutoPitLimiter` | Force manual control of these                             |

Recommended presets [#recommended-presets]

**Casual / open public server** — leave most aids allowed (`stabilityControlLevelMax: 100`, `disableAutosteer: 0`) so newer drivers can join comfortably.

**Sim / league server** — lock it down: `stabilityControlLevelMax: 0`, `disableAutosteer: 1`, force manual gear/clutch. This gives everyone the same realistic baseline.

<Callout type="info">
  Note: ABS and TC are part of the GT3/GT4 cars themselves and are always available as in-car electronics — `assistRules.json` governs the *extra* driving aids layered on top, like stability control and auto-steer.
</Callout>

Set assists with the [ACC Config Generator](https://xgamingserver.com/tools/assetto-corsa/acc-config).