Help with circuit design, radio receiver/car entry

Hello I is new here, need alittle help with programming Atmel micro controllers, or Audiuno to pre start my cars engine to warm it.

I am trying to make the right program/ switch to receive 3 presses from my cars keyless entry lock, and then activate a relay sequence. And other settings accessible by remote press combinations. But my programming ability is not this good yet.

So basically designing a switch receiver which can tap into my cars existing door lock receiver in the car, and...

Help with circuit design, radio receiver/car entry