The DBAG Class 605, commonly known as the ICE TD is a high-speed diesel multiple unit (DMU) train, formerly in service with Deutsche Bahn and DSB.

It was retired from active passenger service in 2017 after years of operational issues with one trainset being kept and repurposed as a technology testbed.

Following the successful inauguration of the Intercity-Express system in 1991 and the order to develop the ICE 2, in 1994 DB started plans to upgrade long-distance services using conventional lines, with comfort level raised near the ICE standard and higher speeds, with tilting electric multiple units to replace locomotive-pulled InterCity (IC) and InterRegio (IR) trains.

This development resulted in the ICE T. Later, Deutsche Bahn also saw the need for a similar new train on its non-electrified routes, and started the ICT-VT project, with "VT" standing for Verbrennungstriebwagen (internal combustion motor car).

The trains share a general styling concept, most prominently a lounge section in the front cars with a view forward at the tracks, being separated only by a glass wall from the driver's compartment.

Technically, the trains share a lot of components and technical layout, as well as the concept of distributed traction: in contrast to the ICE 1 and ICE 2 designs, the new units were planned not with powerheads, but with peripheral underfloor motors, in order to reduce axle load (quite important for tilting trains) and increase tractive effort.

[3] A characteristic element of the Siemens system visible on the outside is the crescent-shaped top of the outer carbody supports (above the bogie center).

After pilot runs, the trains entered regular service on the new ICE line 17 between Dresden and Nuremberg from 10 June 2001.

After four years of storage, the trains were re-activated for a short while, in anticipation of extra traffic during the 2006 FIFA World Cup being held in Germany.