  Numerical simulations of galaxy mergers are a powerful tool to study these
fundamental events in the hierarchical built-up of galaxies. Recent progress
have been made owing to improved modeling, increased resolution and large
statistical samples. We present here the highest-resolution models of mergers
performed so far. The formation of a variety of substructures ranging from
kinematically decoupled cores to globular-like clusters is directly resolved.
In a resolution study, we show that the large-scale structure of
elliptical-like merger remnants can be affected by the resolution, and a too
modest resolution may affect the numerical predictions on the properties of
major merger remnants: understanding precisely which kind of event or
succession of events has formed the various types of elliptical galaxies
remains an open challenge.
