Safety chains

Always connect the trailer’s safety chains to the frame or hook retainers of the vehicle hitch. To connect the trailer’s safety chains, cross the chains under the trailer tongue and allow slack for turning corners.
If you use a rental trailer, follow the instructions that the rental agency gives to you.
Do not attach safety chains to the bumper.
See also:
Front passenger sensing system
The front passenger sensing system is designed to meet the regulatory
requirements of Federal Motor Vehicle Safety Standard (FMVSS) 208
and is designed to disable (will not inflate) the front pass ...
Ford esp extended service plans (U.S. only)
More than 30 million Ford and Lincoln owners have discovered the
powerful protection of Ford ESP. It is the only extended service plan
backed by Ford Motor Company, and provides “peace of mind”
...
Disposal of airbags and airbag equipped vehicles(including pretensioners)
Contact your authorized dealer as soon as possible. Airbags MUST BE
disposed of by qualified personnel. ...
