If you are a mechanic or a restoration hobbyist, you likely need the DF357 because your van is stuck in third gear or leaking oil from the selector shaft. Here are the hard specs.

5-speed manual, front-wheel drive (Transverse layout). Torque Capacity: Designed for engines producing up to 200 Nm (148 lb-ft) of torque. Common Original Fitment:

The correct article for depends on the implied noun in French (the engine type), but the most standard and proper choice is:

After repairing the identified issue (e.g., replacing a sensor or an ABS ring), the fault memory must be cleared using a diagnostic scanner. A service reset procedure may also be required for newer models to restore full functionality. DF057 Renault Megane Diagnostic Guide | PDF - Scribd