2005 05 Mercury Montego Keyless Entry Remote - 4 Button w/ Trunk Release Remote Programming: Most remotes take 3-5 minutes to program This device comes with FREE programming instructions and will be included with your purchase. The instructions are quick, easy to follow and take just minutes to complete. They're written so first-timers can do it themselves without the time, hassle, and expense of committing to a dealership service appointment. 8S4Z15K601A 8S-4Z-15K-601A