Full Protection is included with this booking.

This means that:

If purchased prior to pick-up of the car, Rentalcars.com's Full Protection product will refund the customer:

charges for damage to the rental car's exterior or mechanical components, including: bodywork, roof, undercarriage, windscreen, windows, mirrors, locks, wheels, tyres, hubcaps, engine, clutch, battery.
'immobilisation' charges (for loss of earnings while the car is being repaired and cannot be rented out)
essential taxi or towing charges resulting from a breakdown or accident
charges directly related to locking themselves out of the rental car or losing its key(s)
any amount the car hire company charges as a result of claiming on the car's Theft Protection policy
car hire company administration fees related to any of these points.