The cladding is formed from aluminum sheet faces the vehicle and the roof is made of fiberglass.

The manufacturer collaborated with the bus maker company SOR, giving them special tiles for interior and exterior of the vehicle.

Engine with automatic transmission are placed vertically in the so-called "Chimney" in the right rear corner of the bus.

Fuel tank with diesel version of the C 12 D has a volume of 250 L. Model C 12 was created by modifying the structure of the previous type TEDOM Kronos 123 in late 2006 and 2007.

At the Brno AUTOTEC 2008 the model C 12 with a slightly modified front and rear face was introduced .