Wire harness issue
 

Question here and need some help, have a Q7 and yday the car came to a complete stop in the middle of an intersection on a major road. Had the car towed to my local audi dealer and after plugging the computer in, was told the wire harness got wrapped around the drive train. The tech told me a rock must have hit it but find that real hard to believe and harder to believe a wire harness could get wrapped around a drive train and shred it. The dealer wants a ridiculous amount of money to fix, any advice will be calling Audi North America as well on Tuesday. Thanks in advance for any help..:)