1998 Mercedes-Benz ML320 brakes problems

My car rolled over on klondike highway in yukon, canada. It happened when driven on down slope loose gravel. The road condition was not good on that highway. When the car travel from the paved road condition to loose gravel, it slipped in the beginning then lost control and rollover. I could not stop the car by stepping hard on the brake. My wife got a broken shoulder when it rolled over. I got some cut and scratches on my right hand. The car was upside down finally.

While applying brakes at 25 MPH the brake pedal went to the floor and the vehicle continued on through an intersection controlled by a stop sign. Consumer was able to coast the vehicle through the intersection without an accident and bring the vehicle to a stop. Vehicle was towed to a repair shop and to a dealer, who informed consumer that the brake line leading to the rear needed to be replaced due to corrosion.