2004 Mercury Sable Andrea M. Butler

Both can be had at the dealer.You may need to take in the VIN# and registration to get the code for the keyless entry.The remotes will have to be programmed to the car. They can give you a "permanent factory code" for the key pad.The you can program your own code-
1-enter permanent factory code
2-press the 1/2 button within 5 seconds to enter programming mode
3-within 5 seconds enter new code, doors will lock,unlock to verify code, this erases previous codes

the remotes will also need to be programmed.
1-insert key, turn ignition off-to- on eight times in succession, ending with key in on position doors will lock,unlock to verify in programming mode
2- Press any button on new remote, doors will lock, unlock to verify
3-Do the previous step with the second remote, doors will lock unlock to verify.
4- turn ignition off.doors will again lock,unlock to verify