Alan C
Active Member
There is a recessed rectangle on the the rear of the fob where a label is fixed denoting the key number.
If the sticker hasn't fallen off. I don't know of any other way to tell the fobs apart except from superlocking the car then seeing which memery position the seat returns to, mem 1 or mem 2 to the respective fey fob. Keys 1 and 2 would have been supplied from new, keys 3 and 4 won't set a seat position. I think the diagnostics will show which key has been used last?