You should call your credit card company again, and find out what insurance your card provides. Levels of coverage vary and some do not provide coverage outside your home country. In some cases, a credit card company will cover collision after a high deductible and many do have a maximum. Also, ask if there are any other benefits provided for a traveler.
What do I purchase when renting a car in Spain, everything. I do not want to spend my vacation time calling credit card companies and my insurance company to resolve an insurance issue. Meanwhile, the rental car company will place a debit on your credit card to cover any damages. Try reserving a room or renting another car after either reached your maximum credit limit, or the credit card company security unit places a hold on the card.
Also, I read the fine print on the coverage offered because they are all not the same. The following coverage is available to you at the rental car counter:
Collision Damage Waiver (CDW). Sometimes called a Loss Damage Waiver (LDW), this coverage relieves you of financial responsibility if your rental car is damaged or stolen. The CDW may be void, however, if you cause an accident by speeding, driving on unpaved roads or driving while intoxicated. In Spain, I discovered some companies do not cover broken glass and tires or any damage caused by theft or vandalism.
Liability Insurance. This provides excess liability coverage of up to $1 million for the time you rent a car. Rental companies are required by law to provide the minimum level of liability insurance. But not enough to cover damages in a big accident.
Personal Accident Insurance. This provides coverage to you and your passengers for medical/ambulance bills. You may want to consider this coverage if you do not have adequate medical insurance. Sure, Spain has socialized medical care, but the coverage may pay for your ambulance trip home.
Personal Effects Coverage. This provides coverage for the theft of personal items in your car. In Spain, not all companies cover all personal items, and there is a maximum.
Also, inspect the car before you drive off. If you notice any damage inform the attendant before you leave the lot.
The cost of this coverage varies among companies, and should make your shopping more interesting. I rented my last car from
http://www.rentacar-worldwide.com/ and I purchased full coverage.