Liability for car accidents is decided in court unless someone admits fault. I'm so confused about this whole issue. If the self-driving system is found to be at fault then that is by definition a design flaw since self driving cars are required to drive in accordance with the law (at least in California).As @Ofarlig points out, if a company like Mercedes is willing to cover the liability just like a standard new car warranty, then everything is seamless and smooth. There's no need to go to court to prove that the elevator's software caused the accident.
It takes time to go to court to prove there's a design flaw from automobile manufacturers. It took 6 years in court before GM would settle Ignition Switch Class Action.
Tesla's way of not covering liability is not consumer-friendly. I understand that a driver can be blamed right now with Tesla's automation system but Tesla needs to communicate its confidence in its own technology by covering liability when there's no driver in a Robotaxi.