Full FIS Menu accessibility

[Simeonv]

The car is a 05 plate MK5 BKD with retrofitted highline clocks and updated CAN Gateway so I can use the RNS 510. I've red numerous themes about accessing the FIS menu through the wiper stalk (no MFSW) but didn't get to the bottom of it. Everywhere it's stated that by holding for a couple of seconds the up/down buttons on the stalk enters the menu but it does nothing on my end, just changing the shown data (elapsed time since start, consumption etc).
Is there anything else that I'm missing, maybe something related to coding.

[Simeonv]

I found how, it turned out that I need a 30 byte CECM so I fitted the following one : 3C0 937 049 AJ .
But to enable this function it requires a Security access. Found  the code for the 09 Centr. Electric channel which should be 31347 , but to no avail. Once entered VCDS returns invalid key.

Is the code wrong for this module, or I'm missing something.
Thanks