I have the same problem on my 09 Sport with cloth power seats.
I have done 2 TSB's
1. Wrapping electrical tape on spring ends.
2. Wrapping inside the seat with some foam silencer material.
The squeak sounds worse now, it sounds like an old spring mattress! If anyone has any other ideas...
Hey CXRabbit, did your installer hook up the VSS (speed pulse sensor) to your Kenwood NAV? If so is it possible you could tell me where this sensor wire is located? Thanks!