I think it would be difficult to get every point of the car inspected without some sort of cost. Most dealerships probably wouldn't be receptive to inspecting in detail parts that are not currently under any sort of complaint.
I would do as others suggested and look for every little minute detail and have them check out any issue you could find, minor or not.
Steering lock isn't going to be covered/replaced unless yours is failing... fuel sender won't be replaced/checked unless you have a reason to believe the level is off.
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