You have a right to expect a repair that results in the vehicle appearing undamaged. It is up to them how they need to do it. The taillight should be properly installed without rattle or leak.
Whether you can see damage at 100 feet or 1 foot doesn't matter.
They can match paint very well.
As far as the Xpel goes, I don't think coverage for 1 panel will be that expensive. If they cannot install it to the same standard used for the original then they must have it done.
You entrusted your car to them undamaged. They must return it to you in the same condition. They have insurance, they can repair your car so it looks as good as it did when you took it in. It is reasonable they should provide you with a car to use until yours is returned, whether a loaner or a rental. You are not expected to take your car from there with any visible evidence of damage. If they replace a body panel, the result should be indistinguishable from the rest of the car. The gaps should be even, panels and parts should align properly, the paint should match.
If their repair causes diminished value, such as with appearance on a Carfax report, then they are liable for that amount as well. Basically you should not suffer financial loss for their failure to properly care for your car.
You have a very nice, very expensive car. That should not change because you had it serviced.
Whether you can see damage at 100 feet or 1 foot doesn't matter.
They can match paint very well.
As far as the Xpel goes, I don't think coverage for 1 panel will be that expensive. If they cannot install it to the same standard used for the original then they must have it done.
You entrusted your car to them undamaged. They must return it to you in the same condition. They have insurance, they can repair your car so it looks as good as it did when you took it in. It is reasonable they should provide you with a car to use until yours is returned, whether a loaner or a rental. You are not expected to take your car from there with any visible evidence of damage. If they replace a body panel, the result should be indistinguishable from the rest of the car. The gaps should be even, panels and parts should align properly, the paint should match.
If their repair causes diminished value, such as with appearance on a Carfax report, then they are liable for that amount as well. Basically you should not suffer financial loss for their failure to properly care for your car.
You have a very nice, very expensive car. That should not change because you had it serviced.