Complex sentence: Alternatively, only four Metro Rail cars (fleet numbers 103,105,107 and 116) still retain the old color scheme, but it is expected that those four cars will eventually be painted in the newer livery during their mid-life overhaul being performed.
Split into simpler sentences: Alternatively, only four Metro Rail cars (fleet numbers 103,105,107 and 116) still retain the old color scheme. It is expected that those five cars will be painted in the newer livery during their mid-life overhaul being performed.