PTU service documentation is the most important non-recall item on an AWD Edge. On the recall side this generation carries brake-hose (20V-469, 25V-544), shift-bushing (22V-413) and — on 2.0L cars — torque-converter (18V-390) campaigns.
Run VIN at nhtsa.gov/recalls and ask specifically for PTU service receipt.
Est. cost: Walk away from AWD without documented PTU service
Source: NHTSA + Ford maintenance