I did this 9 months ago so if this has already been covered in another thread then sorry.
also sorry if the detail is lacking but when i went looking online i couldn't find much info about what exactly needed changing in the car so i hope this helps someone.
What you will need
Forscan with a...
Your old keys will still work after this. so you only really need to buy 1 new key and keep the rest spare.
I wont go over how to use Forscan but its pretty straight forward. you can find some guides online that go over how to programme modules/modify AS-BUILT data with it.
What you will need...