check ebay seller KUFATEC... he might be on ebay.de... i am not sure if he has harness, but i think i bought one from him about 8 years ago... you do need a harness to go from TV module to nav computer, and that harness was the hardest piece to buy...

mine was a little too tight, so I cut it and spliced in about 2 extra feet of cable - now it is routed without being stretched...

if you decide to extend the length of your harness, you must make sure you properly shield the signal cables... but first, find the harness...