If it's already factory fitted.I would suggest whom ever installed your RNS510 did not connect the AUX.You will need to look in the back of the unit to see if it has been connected or not.report back once you have done this. Then we will be able to better trouble shoot.I do remember the RNS510 is the same as the RCD510 in which you need to go into the radio's options and enable AUX.If the option does not appear.you will have to log into the RNS510 with VCDS and enable AUX.
Either someone replaced the armrest with a second hand one which has the AUX jack fitted. but didn't wire it in. Or the armrest had a cd changer in which someone has removed (along with the wiring harness) and left the AUX jack orphaned?
if you want to wire it in easiest way buy plug for aux jack, buy plug for 510 quadlock, buy some repair wires solder them together, put in car all done.
well if you want all the part numbers and rough prices let me know and i'll post up
The plug on the back of the aux connector is 8k0 793 754 approx 1.25the small repair wires for this socket would be 000 979 009 E x3 as you'll need 6 ends (there the same on aux and quadlock connector) approx 2.98 eachmultimedia in socket for quadlock 3B7 035 447 A approx 5.50pin 1 on aux connector to pin 7 on quadlockpin 2..................................pin 2..................pin 3..................................pin 1..................this will give you aux in (turn it on first in the settings or media menu of the 510)
Or goto TPS for a little cheaper, but you'll still need to add some wire between these parts and preferably solder them together, plus if you remove the 510 you might even have one of the plugs already in the quadlock, if you have a CD player for instance
