Latest speculation: This might be the Mercedes-Benz Sport Cruiser, an R-Class successor? 
- Based on the LWB C-Class (in China designated with L) which has the internal code V205
- Probably a 5 seater, with no optional third row
- might offer optional second row bucket seating to accomodate 3 adults w/o shoulders rubbing
- Start of production as early as 2015, about 6 months after the R-Class production ends
- The above render needs work, especially in the area of grille and headlight integration.