| Materfer CMM 400-2 | |
|---|---|
 A CMM 400-2 on Tren del Valle | |
| Manufacturer | Materfer |
| Built at | Córdoba Province, Argentina |
| Formation | 1-4 cars per trainset |
| Capacity | 70 per car (seated) |
| Operators | Trenes Argentinos |
| Lines served | Mitre Line, Tren del Valle, Urquiza Railway, Belgrano Railway, Roca Railway |
| Specifications | |
| Car body construction | Stainless steel |
| Doors | 1 per side |
| Prime mover(s) | Scania (400 hp) |
| Transmission | Hydrodynamic |
| Power supply | Allison (500 hp) |
| Bogies | Materfer |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in), 1,676 mm (5 ft 6 in), 1,000 mm (3 ft 3+3⁄8 in) |
The CMM 400-2 is a diesel multiple unit produced by Materfer in Córdoba Province, Argentina. The units are produced in Argentina's three primary track gauges and the standard gauge variants were the first to be produced for General Urquiza Railway services in Entre Ríos Province.