hey, im currently doing an electrical 'overhaul' on my vp berlina, im replacing elec window motors, electrical ariel, etc and one thing i want to fix is the central locking, it only opens/locks the drivers door, and when i try to lock up iw wont lock untill all the other doors are locked? can someone tell me weather this would be a module somewhere, or should i replace all the electric door lockers inside the doors? any help would be great cheers