2005 Mercury Sable Keyless Entry Keypad Not Functioning

its not an easy job 1.Remove the front door trim panel 2.Position the watershield aside. 3.Disconnect the exterior door handle actuating rod from the door latch. ? Open the clip. 4. disconnect the electrical connector on keyless entry keypad 5.Remove the bolts and exterior door handle. 6.remove keyless pad 3 nuts 7. remove and replace keyless pad

Thanks for the help,
One more thing, Where can I find replacement keypads?

dealer or used auto part place
I don’t think its available through the aftermarket

Could you give a rough estimate on how much it would cost, with parts and labor, for a dealer/mechanic to replace the keypad?

Thanks again

Its about 1.5hr to 2 hr of labor
but as parts goes need VIN #
(((my book does not show the price it say call for price )))
you can call your local dealer for price and availability