Most of us depend on auto insurance to pay for repairs resulting from a collision.

But not the super-rich. Auto insurance for the wealthy is all about liability coverage -- and lots of it. Chances are, they won't even put in a claim for an accident for fear their rates may increase.

Courtemanche says uninsured/underinsured coverage is particularly important now, on their auto policies and as an endorsement on their umbrella policies.

"In an economic downturn, more people at the very low end of the economic spectrum drop their insurance because they can't afford it anymore," he says. "If you're a big earner and you're in a car accident and, besides your medical bills, your disability insurance has limits and you can't work for a long period if ever, that could become really, really important coverage for you."

Beyond a certain point, the sheer value of the car requires specialized coverage -- and diligence.

"You see guys with cars that you think are worth $30,000 or $40,000 and they're worth $300,000 and $400,000," says Clement. "You never know who's going to have the midlife crisis and buy a Bugatti."