Solved! Go to Solution.
Just add the parcels to the map, save the MXD and then run the code. The parcels should then be included.
Right, I didn't save the mxd before I ran the code.
Thanks.
mapping.ExportToJPEG(mxd, r"C:\temp\Map_" + str(x) + ".jpg", df, df_export_width=2209, df_export_height=1663, world_file=True)