Buying a car insurance from a dealer is the easiest way of buying Insurance, but sometimes expensive aswell.
Dealers claim to offer additional benefits other than the basic Comprehensive Cover.
Benefits like better Servicing, Assistance and Support which Insurers also provide. They act as Intermediary between Customer and Insruer.
I think you should compare quotes of different Insurers, through there Websites and precisely differentiate the coverages/benefits/Exclusions offered from Insurer and from Dealers.
