You should always attach chains between your vehicle and your trailer. Cross the safety chains under the tongue of the trailer so that the tongue will not drop to the road if it becomes separated from the hitch.
Instructions about safety chains may be provided by the hitch manufacturer or by the trailer manufacturer. Follow the manufacturer
Impact sensing door unlock system
In the event of air bag deployment resulting from a vehicle impact, all doors
will automatically unlock. ...
Components and Components Location
Component Location
1. Head lamp leveling actuator (Built-in Head lamp)2. Head lamp leveling unit (Rear right only)
...