Erasing seat memory
 

As this X5 50i is my first BMW, I wasn't clear how the comfort access really worked and programmed both seat settings for my key fob. However, there is only one settings programmed on my wifes fob and whenever she approaches the car the seat automaticallymoves into position.

My question is, how can I erase the second settings from my fob memory, so that the seat changes positions automatically when I approach the vehicle?

The way it should work is your key gets 2 settings and her key gets 2 settings. The way you last left it is where the seat should go with your key. You do have to lock the car with her key and unlock with yours to have it switch.

I think that is an option box to check in the idrive settings.

Correct, under the Door Lock settings.