Tried the xds settings with my r but when I bring up the control module for it my Vagcom/vcds tells me n/a any idea why?
A little late for you (over a year after!) but since the thread isn't quite dead yet, thought I'd give some info. This should also help others that have it showing up as "N/A" but have a compatible brake controller and have come across this thread.
XDS
can be enabled provided you have an MK60 or MK70 ABS controller. It will say the adaptation channel is N/A if it is disabled in the controller altogether. This doesn't mean it's not available just means it hasn't been enabled. I enabled it successfully on my A3 2.0T Quattro doing the following.
What you do is go to long coding, Byte 17, Bit 3 (or wherever the Long Coding Helper shows you it is for your car/module). You have to check the box for that bit to enable PR-UG3/UG4 and then save the coding. On my car it told me the module was not initialised or whatever but then you can either use the "1234/123/etc." values by clicking "Yes" or by using the values in the module (clicking "No") and then you should get a "Coding Accepted!" message.
There's a video on YouTube in German (I think) that shows you how it's done here:
https://www.youtube.com/watch?v=TmdTq6g-s9w
In a different language and on a Scirocco but you should be able to follow the basic idea.
On my car, for some reason, any time you change a module's coding it locks you out of it until you cycle the ignition so you may need to do that as well. After that, once you go into adaptation in the controller again you'll see XDS comes up normally and is no longer "N/A". From there you can make sure it's enabled and change it to strong/weak/etc. as desired. Once enabled I'm pretty sure it only works on the front end, FYI.
So if you see N/A in the adaptation menu you're not out of luck provided you have a brake controller that supports XDS; you just have to enable it in long coding first.
