Originally Posted by aus
From what I understand, early cars had it, but it went away with the cloth visors and seatback nets.
I think early non-M cars have it.
My 2008 M3 has the cloth visors (not sure about the seatback net, never sat back there), but had no hole for the lighter. Pretty much every other M3 I've seen that's 2010 and up has the hole but no socket there.
mdosu: I will try to take a pic and post it later.