The contact owns a 2014 Mercedes-Benz CLA250. The contact stated while driving 30 MPH, the contact briefly lost control of the vehicle, prompting the contact to pull over to the shoulder of the roadway. After a visual inspection, the contact observed excessive rust underneath the rear subframe. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to Extended Warranty’Rear Subframe Damage Code: 35441 47. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 100,000.