The same car is shown pulling up twice outside Charles Prentiss' house in shots separated by dialog inside between Charles and Martin, a black Seat with the registration AF03 AOM.
In the close-up of the first comment to be posted to the website Prentiss McCabe created for the fictional Marqueiro Hennell Disease it clearly shows that it was to originally be called something else as the initials WSD are seen. Jamie however reads it as MH Disease.