Model: The cars are completely new tooling for the InterRegio car family. They have multiple color interior details. All the cars have factory-installed LED interior lighting. Each car has a built-in buffer capacitor to bridge short-term spots without current. The cars feature operating, current-conducting close couplers. The interior lighting works in conjunction with the marker light car from the set 43901 set. A fixed defined car order is stipulated to do this. There are red transparent marker light inserts at the ends of the cars. The underbodies are specific to the car types and include many separately applied details. The buffer height adheres to the NEM. The cars have type MD 366/367 trucks with and without separately applied generators. The vents on the car bodies are separately applied. There are imprinted car route signs on the cars. The cars are individually packaged in a master package.

The minimum radius for operation is 360 mm / 14-3/16". Length over the buffers approximately 84.6 cm / 33-5/16".

Prototype: Three different design German Federal Railroad (DB) InterRegio passenger cars. One type Aim 260.5 passenger car, 1st class, one type Bimz 264.2, passenger car, 2nd class, and one type ARkimbz 262.2 "Bistro Café" half dining car. Light gray / distant blue basic paint scheme with pastel blue striping. Train route: IR 2670 from Konstanz to Kassel. Car sequence numbers 49, 50, and 51. The cars look as they did in 1993.

Additional add-on InterRegio cars can be found in the Märklin H0 assortment under item numbers 43901 and 43902. An electric locomotive to go with these cars can be found in the Märklin H0 assortment under item number 39152.

This model can be found in a DC version in the Trix H0 assortment under item number 23200.