My DSG Xllence Lux started today with clock and all mpg settings back to zero.
Seat dealer said that they are aware of a developing issue which is limited to certain batches (mine new from factory Aug 2018)
They are seeking details of symptoms and vehicle activity around the relevant times.
My problems (maybe not related) started two days ago with the SatNav trying to divert me, because of overnight roadworks, but it was the middle of the day. Was it seeing a failing clock time?
Then when I went to reset the time, the menu advised me that I was not on GPS time setting but Manual time setting. This had also changed.
Not sure what else may have changed but Seat dealer said 'nothing to worry about' and could I please give them updates to help build up a database of faults symptoms and possible causes.
They also asked for my mileage (which just turned 6500 on fully functioning odometer). Maybe the problem is 'built in' to the software around a time or mileage?
If you have these issues, please make sure that you report this to your Seat dealer.