I too was looking at insurance quotes for two cars,
Car 1. W220, Mercedes S-350,petrol, good spec, 04 plate, £6000, quote £624
Car 2. L322, Range Rover 4.4,petrol, [Vogue, I think] 06 plate, £13000, quote £398.
It baffles me how a car half the price of the RR is £200 more to insure is it...