What's the story behind the metal ridge above the door on this 1963 Cadillac?

It is certainly a deliberate part of the mold, rather than being flash, but I would like the toy even more if this extra metal were absent.

http://i20.photobucket.com/albums/b228/PropMonster/ToyAuto_VariousBrands/Jada/JADACaddy63Blu001.jpg

It appears to be part of the interior that just sticks up a bit too far.