I have a 2016 860i that was parked close to a river that flooded over night. The water came up the the top of the bed and stayed there about three hours. The water went down and a couple days later we were able to pull the gator on a trailer to take to the John Deere shop. They said they found rust in the oil and refused to work on it any further. It was never started while in the water. They said my machine was a total loss. What are my options ?