The BVG Class A3 is a type of Kleinprofil train that was built after World War II.

After the first delivery in 1957, the transport companies worked together with Waggon Union on the construction of small-profile trains similar to the D-type series.

After the construction of the Berlin Wall, A3-60 trains were only allowed to run on Line B I (Schlesches Tor - Ruhleben).

Originally, the A3 and A3L twin-wagons bore all-round mouldings below the edges of the windows, all of which were removed in the late 1970s.

The aluminium car body had shown a series of wear and tear, so the upgrade would not have paid off.

Although currently (as of February 2016) only two preseries trains of this new IK series are delivered, which is expected to remain so until 2017, the first A3L71 cars had to be phased out in 2010 and 2015, since - similar to a few years ago for the A3L67 - the aluminium cars are now in such a bad condition that they could be refurbished at a great expense.

In 1982 the design was slightly modified, but remained compatible with the existing trains and could be used interchangeably with them.

As a result, the need for newer vehicles was once again created, and the BVG was already examining the first trains of the GI / 1 series due to technical defects.

They were based on the A3L82 but were painted grey on the inside, unlike the earlier trains, which had wooden panelling.

The rest were parked in Grunewald and Friedrichsfelde and served only as spare parts donors.