The contact owned a 2007 Mercedes-Benz GL450. The contact received a recall notification of the NHTSA Campaign Number: 22V315000 (Service Brake, Hydraulic). The vehicle was taken to the dealer where the contact was informed by the dealer that the vehicle had been inspected but the brake booster was not replaced. The contact then stated that approximately eight months later, while his wife was driving at an undisclosed speed, she depressed the brake pedal to stop the vehicle however, the vehicle failed to stop. As a result, the vehicle crashed into another vehicle. No warning lights were illuminated. No injuries were sustained. No medical attention was required. A police report was filed. The vehicle was towed to a tow lot and deemed a total loss by the insurance company. The dealer was not notified of the failure. The manufacturer was notified of the failure and the contact was provided a case number. The contact was informed that he would be in contact however, had not received a call back. The failure mileage was approximately 187,000.