area of the Swiss Federal Railways, SBB Cargo (SBB Re482), and 20 units for Swiss private railway BLS AG (BLS Re485). The Swiss locomotives differ from the German versions in details such as pantographs (2 more, with smaller contacts for running under Swiss catenary (not because of tunnels)) and Switzerland specific safety systems in addition to the German systems. TRAXX P140 AC In Luxembourg CFL operates 20 locomotives. TRAXX P160 AC The TRAXX P160 AC is the passenger version of this class, with a correspondingly higher top speed of 160 km/h. A lower unsprung mass was achieved by using hollow shaft final drives instead of the axle hung motor arrangement of the 140 km/h maximum speed versions. The bogies and drive unit are the same as used in the DBAG Class 146.0. In Germany, DB Regio acquired 32 units between 2003 and 2005, where they are designated DBAG Class 146.1. Additionally, (Landesnahverkehrsgesellschaft Niedersachsen mbH (LVNG), (Hannover) ) has 10 units which are leased to the railway company metronom (operating as ME146). TRAXX F140 AC2 The first AC member of the TRAXX 2 family, which featured carbodies with improved crashworthiness and water-cooled IGBT-based inverters, was the demonstrator loco 185 561, delivered in May 2004. It was produced ahead of the main tranche of TRAXX F140 AC2 locomotives for homologation of the class in Germany. Another demonstrator TRAXX F140 AC2, 185 568 was used for tests on the then new HSL-Zuid in 2006. Subsequently, it was used for tests of the ETCS system. Both demonstrator locomotives were eventually sold to private operators for normal use. The remaining 200 of the 400 Class 185 freight locomotives ordered for DB Cargo were to be of this type, and the new versions were given the subclass designation DBAG Class 185.2. Since this large order represented the main body of production at Bombardier's Kassel plant, any further private orders for the AC locomotives would be included into the F140AC2 production line - thus the original F140 AC type effectively ceased production when the production of DB Cargo's (by then renamed Railion) Class 185.2 began. The locomotives operated by SBB Cargo are designated Re482.2. TRAXX P160 AC2 Alongside the F140 AC2 locomotives, the passenger versions received the same improvements. DB Regio received 47 units between 2005 and 2006; as with the freight version the '.2' subclass was used to distinguish these new versions - the Deutsche Bahn