I remember an airliner crash, but I do not know what plane it was. It was either the test flight, or among the first flights, of a new generation russian airliner, advertised as having advanced safety features, some sort of better EGPWS, however, the system was either turned off or malfunctioned, and the plane crashed. Do you know which plane and flight this was?
It sounds like you may be referring to the crash of the Sukhoi Superjet 100 during a promotional flight in Indonesia on May 9, 2012. The Sukhoi Superjet 100 was a new Russian regional airliner that had been recently introduced, and was being promoted to potential customers in Indonesia at the time of the crash.

During the flight, the crew reportedly requested permission to descend to a lower altitude due to weather conditions, but crashed into a mountain instead. There were no survivors among the 45 passengers and crew on board.

An investigation into the crash found that the aircraft's terrain awareness and warning system (TAWS) was functioning properly, but the crew had disabled the system's "glideslope" function, which may have contributed to the crew's lack of awareness of their proximity to the mountain.

It's worth noting that while the Superjet 100 was indeed marketed as having advanced safety features, including its TAWS system, the investigation into the crash identified several other factors that contributed to the accident, including crew error and inadequate training.