Hi Melissa. There are manufacturer buybacks (in this case, Lincoln), Lemon Law buybacks, and BBB (Better Business Bureau) AutoLine Arbitration settlements. In some states, you are required to go through the BBB AutoLine Arbitration before a Lemon Law Buyback.
You do not mention how many times your vehicle has been back in for service, what was corrected, what was not, etc. etc.
Also, have you contacted Lincoln Concierge to file a formal report about these problems yet? If not, I would recommend doing so.
For Lemon Law buybacks, you would need to know the Lemon Laws of your particular state. Lemon Law buybacks normally require a minimum number of repair attempts for the same issue, and/or a minimum number of days out of service for repairs at the Dealership. There are often other stipulations, such as time limits from when the vehicle is new, types of problems that qualify, etc.
As an example, I have attached the Lemon Law Regulations brochure from my state (NJ) below.
Concerning manufacturer buybacks: That will all depend on the negotiations you have between you, the Dealership and Lincoln. There are no set rules. Obviously the vehicle owner must bring the vehicle in for service several times before any manufacturer will offer a vehicle buyback.
That is only a brief outline. More information as to what has been done with your vehicle so far may help us determine whether you are at the manufacturer buyback/Lemon Law stage yet or not.
Keep us updated and good luck.