Do you know which version of the ipod connector you have in the armrest? There are two an older version that has an ipod adapter recessed inside, and MDI type which has a proprietary plug and an ipod cable attachment?
If its the older type then I guess you could simply extend it with a female to male ipod cable, but im not sure if its ipad compatible, and it doesnt allow full integration only allows you to play playlists which are saved in the first 5 slots.
The MDI will allow full ipod integration and could also be extended using a female to male ipod cable, hope that helps.
Old style adaptor
MDI