If a restaurant sign fell onto my vehicle, how to receive compensation from restaurant?

Question Details: I parked in a restaurant lot and then went inside to eat. I then heard something tumbling down roof of the restaurant followed by a loud crash. I went outside and discovered that a large section of the restaurant's metal sign fell onto my vehicle. This has caused significant damage and my insurance is pretty confident that my vehicle will be totalled. I have my own insurance coverage on the vehicle. What will the restaurant be responsible for? The owner has claimed his insurance company will call me. There was a police report filed. My car is an older vehicle so the total loss amount will be no where enough to purchase another used car. Shouldn't the restaurant be responsible for compensation beyond the price of the total loss evaluation? I by no means have the funds to go out and just purchase a car. It wasn't something I planned on. This vehicle has been well taken care of, significant money put into its up keep so it would last several more years. Does not seem right that the restaurant doesn't owe me some kind of compensation. Is the only way for me to try to receive damages is to sue the restaurant owner?

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