To find it, you should:
* Check the center console: This is the most likely location. Look around the radio, possibly in a small compartment or on the face of the radio itself.
* Consult your owner's manual: The manual specifically for your 2006 Escape model year will show the exact location if equipped.
* Look in the glove box: Less likely, but some models might have it hidden here.
If you can't find it, it's possible your vehicle doesn't have an auxiliary input jack at all. Some models from that year relied solely on CD players or the optional six-disc in-dash changer.
