The German Zetro truck series was developed and manufactured by German firm Mercedes Benz’s and comes in the 4×4 version designated 1833 and the 6×6 version designated 2733.

The Zetros was unveiled at the 2008 Eurosatory defence industry tradeshow and the Bulgarian Army have been operating the 1833 since 2009.

The truck is designed to be compatible with the Hercules C-130 transport and also fits into a standard German railway carriage.