To be able to use a keyless entry fob on a used, older model automobile. I bought my son a 2000 Mercury Cougar as his first car. We received only a single ignition/door lock key at purchase. We bought the clicker, received promptly, followed the included instructions, and now have a quick and secure method for unlocking and locking the car. Thanks guys, this would have been a pain in the neck without the internet, and of course, Amazon. Thanks Get more detail about Keyless Entry Remote Fob Clicker for 2000 Mercury Sable With Do-It-Yourself Programming.
