if you have central locking with your key then upgrading is simple and cheap.
f you dont then its not that expensive to buy a central locking kit, with keyless entry and the difference is so:
1st i mentioned is adding an aerial and a box with a few wires,
2nd is fitting the locking kit in the door and attaching it to the door pins if you have them and it all comes in one.
youre probably confused by all that because i am. take it or leave it if it helps, sorry if it doesnt
