Toyota Prius Owner's Manual page 492

5-1. Essential information
Situations needs to contact dealers before towing
The following may indicate a problem with your hybrid transmission.
Contact any authorized Toyota dealer or repairer, or another duly
qualified and equipped professional or a commercial towing service
before towing.
 The "CHECK HYBRID SYSTEM" warning message appears on
the multi-information display and the vehicle does not move.
 The vehicle makes an abnormal sound.
Towing with a sling-type truck
Towing with a wheel-lift type truck
From the front
492
PRIUS_OM_OM47A19E_(EE)
Do not tow with a sling-type truck
to prevent body damage.
Release the parking brake.