Rt6 Software 2.21 15 [ 99% EXTENDED ]

This most likely refers to (also known as eMyWay ), a navigation and infotainment system developed by Continental for Peugeot, Citroën, DS, and other PSA/Stellantis vehicles (roughly 2009–2015).

Let me know how I can help further.

It looks like you’re referencing a specific software version string: . rt6 software 2.21 15