« Reply #2 on: 22 May 2011, 10:24 »
Although it's not MK6 GTI specific, here's a brilliant thread listing all manner of different settings and cables which is kept very up to date. It's obviously for mk2 Leons, but as the FL versions have a huge number of common parts with the mk6 Golf there is much to be learned in there. Go to the higher page numbers for the current recommended cables.
http://seatcupra.net/forums/showthread.php?t=259591

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‘25 8.5R, ‘23 8R, ‘20 8CS, ‘19 135iX, ‘19 TCR, ‘17 Ed40, ‘17 GTD, ‘15 7R, ‘13 GTI PP, ‘11 GTI, ‘09 GTI, ‘98 Ibiza Cupra, ‘05 GTI, ‘06 Polo GTI, ‘04 GT TDI, ‘05 Fabia vRS, ‘02 GTI T, ‘03 Ibiza TDI 130, ‘01 Leon 180, ‘89 mk2 16v, ‘99 Ibiza TDI, ‘96 VR6, ‘98 Ibiza TDI, ‘92 VR6, ‘88 mk2 8v, ‘92 Polo G40, ‘91 mk2 8v, ‘89 mk2 8v, 205 GTI 1.9, ‘83 mk1 GTI, ‘80 Scirocco GTI, plus some others I’ve forgotten