Some credit cards may entitle their holders to a degree of cover for damage to, or loss of, the rental vehicle, although this is usually restricted to cover for the Damage Liability Fee.  Please, be aware of the following:
Even if you have credit card coverage, you must pay up to the Damage Liability Fee if the vehicle is damaged in an accident or there is third party loss or the vehicle is stolen, and you can only claim from your credit card insurer after payment to Europcar of the Excess/Damage Liability Fee.
The extent of coverage provided by credit cards varies and is usually subject to special conditions and certain restrictions, in particular concerning the maximum length of rental and the type of vehicle which can be covered and the type of damage covered.
Europcar strongly advise you to contact your Credit Card organisation before rental and provide details/proof of your coverage before arriving at the Europcar rental location to collect your vehicle.