Last year when I bought my C63 I was suprised to find it was cheaper to insure than my e350 convertable it replaced. Aviva were the cheapest by a mile and quoted me around £450. This year this has risen to £1050! A little look around and I can get cover for £335 from Churchill. And this is with a lower excess as well. How can 2 main insurance brokers differ so greatly. I just dont get it. I've managed to get the wifes new ml insured £350 this year. £200 less than last year. Baffled.