Don't think my 55' plate 1.9 tdi has any rear speakers,or they are not working though on the doorcards the honeycomb for 1 per door is there,
not sure if its because i don't have leccy windows could be the reason perhaps?
when in MENU on the Headunit it has balance but only for L/R and bass / treble but nothing for FRONT/BACK so makes me think there is none rather then they are simply broken.
thought would ask on here before chasing it down with VW with no ammunition.
cheers