Hey folks, went to do this today, unfortunately stopped by 2 issues;
1) I didn't have anything to cut the back of the stereo hole area with - might have to invest in a dremel! What has everyone else used?
2) My MDI Unit did not fit in the glovebox!
...For those who wonder about the 'SAFE' pin, if you use a VW MDI (iPod adaptor) you will not need to fit an extra wire to the SAFE port, as the MDI provides this.
Also, for those who want an MDI for the Leon, DO NOT buy the FULL kit (the massive dock thing 5N0 035 341E) you only need the small DVD sized adaptor box which is 5N0 035 342D (and the relevant looms of course!)
Once I get the tools for 1) and correct adaptor for 2) I will refit again!
...I did test the RNS and it was excellent
although had to take it back out for now