Will this bolt straight to my existing mirror assembly?

Yes. This mounts at the factory attachment points on the left mirror housing—no drilling or adapter plates needed. Test-fit before final tightening to confirm alignment.

Do I need any adhesive or fasteners to install this?

Fasteners for the mirror housing are not included with the glass lens. Use your existing hardware from the old mirror assembly, or source replacements from your vehicle's service manual if they're damaged.

Can I use this on a heated mirror housing?

This is a non-heated unit. If your Town Car has heated mirrors, the electrical connectors and heating element won't function with this glass. Verify your mirror type before ordering.