Will this fit my factory mirror housing without any adapters?

Yes, this mounts directly into the OEM mirror frame. The mounting points align with factory specifications — no adapters or brackets required.

Do I need to remove the entire mirror assembly from the door to swap the glass?

Most Town Car owners can access the glass from inside the mirror housing without pulling the whole assembly. Check your specific car's access points before starting — some clips or fasteners may vary slightly by year.

What should I do before installation to make sure it seats properly?

Clean the mirror housing and mounting surfaces of any dirt or debris. Inspect the factory clips and frame for damage — if anything is bent or broken, the glass won't sit flush. Test-fit the lens before committing to final installation.