WARNING
Never unlock the tow ball arm with the trailer attached.
Remove the tow ball arm. Insert the plug into its seat (1).
Maintenance
WARNING
Remove the tow ball arm and protect the seat with the plug before steam cleaning your vehicle.
Keep the system clean. Periodically lubricate bearings, sliding surfaces, and locking balls with resin-free grease or oil and the lock with graphite.
In case of loss, replacement keys are available from the manufacturer by stating the number on the lock cylinder.