Did the dealer tell you the name of the mystery button?
Some.modells have a white emergency button in the doorframe front footpannels behind the pannel.
As I just found out with my luck of this thing mine dosnt.
I try to achieve get this door of the superlock mode.
Any way overriding it.
Not relying on the becm which cleary send the fault in the first place.
As I been told and seen in many problem posts one door in superlock can cause the eka not working.
Yes there is the way spening money out to get the becm sorted until it occurs again and cost money again
By finding the fault and a way to override and may even dusconnevt once is working the superlock mechanism on al doors - it gives at least the freedom of knowing this problem.is not coming back.
I don't.mind doing that as it is free and saves future paying out for it. And by now I know how to get every panel on the car in 5 minutes or less of and disconnect any cables.