They take CR2032 batteries and yes that is how you open the case , takes a bit of force to prize it apart!. Since you post I just tried to use my spare key , which has not been used since the day I took delivery in September and been kept a long way from the car in a Farraday box. It is dead ! I hav...

Everything software wise is more difficult that it should be with this car!
Mine does stay to the correct colour , so I would guess that you are not logged into your account in the car ? , anything else not saving ?

App is a disgrace. Mine currently shows zero charge ,range 115 miles , and everything open / unlocked !!! Not fit for purpose...

I can set the timing on my actual charger , which is is smart charger that links to the app , but the app is not fit for purpose !. The charger gets incorrect info from the car and always shows as zero per cent charge ! The app when charging starts always shows "will be fully charged in less th...

I have not had the update yet , and this looks like another reason to avoid it !! , but my app shows an error of charging system incompatible. Please check charging system. It has only ever been plugged into my home charger so nothing has changed. This model / marque really does seem to be a disaste...

I think it was probably more of a software rebuild to remove whatever bug was causing the problem rather than any official update..

About a month after I took delivery , took them that long to figure out the problem I had from day one. Would therefore have been late October / early November.
The app is showing a new software update is due now , but don't feel inclined to risk it...

Have you logged on in the vehicle ? , It took several visits to the dealer and a software update before I was able to do this , but after that things started working. But welcome to a vehicle with software issues that the dealers say "we cannot defend anymore" , I am sure you will find mor...

Sort of working seems to be the best it gets unfortunately !
Maybe one day Audi will drag itself into the 21st century...

App now shows software update as due. As the last one was withdrawn as it caused problems with the locks I am not going to be in a hurry to book mine in. Also had a problem with the speed limit indicator on the heads up display going off ( always wrong anyway so no great problem ) and displaying a w...