07' or 08' - X5 4.8 Brake & or Hydraulic Failure

[Bimmerext]

Today I had a BIG red warning light come on in the NAV Screen in my 'New' 07' X5 4.8 right after I started the car and drove it a block or so. It stated something to the effect....'You need to stop the vehicle immediately, there has been a malfuction with the braking or hydraulic system, there is a risk driving the vehicle...."
I pulled the car over, shut it off, and about 1/2 hr later started it up again. All the system were reporting no problems. I drove the car very slowly to my house a few blocks away, and will have it towed to the dealer for service tomorrow.
Anyone else experience or hear of anything similiar?

Thanks in advance.