I'm pricing a car rental in Italy during the summer of 2016. Some of the attractive rates (with the large companies like Avis and Hertz) include CDW with a $5,000 or so deductible. Of course, they are anxious to sell additional insurance for complete coverage, for $25 or more dollars a DAY. The reservation interface makes it very clear that the partial CDW CANNOT be declined.
I presume that this would invalidate my credit card's offer of primary collision coverage during the rental. Does anyone have any experience or web citations on this subject? Thank you.