Stadler and Austrian Federal Railways (ÖBB) presented a new KISS double-deck train at InnoTrans 2026, the trade fair held in Berlin.

The presentation confirms the continuation of a supplier relationship that has made the KISS one of ÖBB's principal double-deck electric multiple-unit families on regional and commuter routes. Stadler has delivered KISS units to operators across Europe, and ÖBB remains among the type's largest customers.

The announcement comes as an operator and supplier claim; details on fleet numbers, delivery dates, deployment routes and vehicle specifications had not been published alongside the unveiling. Austrian regional services around Vienna and the surrounding provinces have relied on double-deck stock to lift peak capacity without lengthening platforms, a constraint that shapes ÖBB's rolling-stock planning.

InnoTrans, staged every two years in Berlin, serves as the industry's principal venue for fleet launches, and the 2026 edition again hosted rolling-stock introductions from the major European builders.

ÖBB and Stadler can be expected to release technical data, order volumes and entry-into-service dates for the new KISS variant as the presentation moves from the show floor to contract documentation and fleet plans.