I think there is alot more to the Sync system than just the in-dash unit and so I think it is unlikely that it could be plugged right in. The sync requires a mic for voice activation and steering wheel controls to activate the system, neither of which the FEH has. I'm guessing it would require a substantial amount of work to retrofit it into a model for which it was not intended.

-Tim

2006 Mercury Mariner Hybrid AWD
Black with Pebble interior
Premium Package with Nav & Moonroof



Current ODO: 22,530
Typical Drive: 20 min crosstown in heavy traffic (3.5mi there and back twice a day)

Last three tanks: 26.09mpg
Best Tank: 31.7 mpg calc. (35.0 mpg Nav)
Best Trip: 37.1 mpg for 153.8 miles

457 Gallons of gas saved
That's 9,150 lbs less CO2