The car has been periodically refreshed so it stayed up to date technically, receiving a new transmission and revised engine software. (mercedesblog.com)
Typically that would be combined with updated [performance] engine software, so that could also be a factor. (humblemechanic.com)
Buyers can use the SteelSeries Engine software for personalizing the audio settings when desired, and of course the headset can be used with just a single audio source if desired. (slashgear.com)