I wonder how it would work
I wonder how it would work out if you got scammed and found out after all the repairs and new parts were done, and then called your credit card company and refuse the charges with the argument they deceived you with bogus repairs and have the proof to show it. I have not done that with a garage before, but I did do that to FedEx one time when they decided some overseas shipping was miscalculated by a manager and went ahead and charged me an exorbitant amount that I did not agree to and did not bother letting me know of the charges---a good lesson why you have to check your statements every billing cycle. The credit card company did drop the charges and I never heard back from FedEx.