12686 Coach Position
- Train Name: Chennai Express
- Route: Mangalore Central to Chennai Central
- Operated By: Southern Railway zone
- 12686 Train Schedule: Varies, please check the latest schedule
- Classes: Sleeper Class (SL), Third AC (3A), Second AC (2A), and First AC (1A)
- Coach Position/Composition: Sleeper class, AC coaches, and First AC coach
- Facilities: Comfortable berths, air conditioning, catering services