EAS manual will only show up on the dash when in access mode (from memory if you leave it locked in access mode when shutting down, it will show it when powering up again so you can use it to crawl around parking garages).
The other time you'll see it is if the vehicle is actually running on coil springs and has had the EAS ECU bypassed so it doesn't keep bleeping and throwing up faults.
As Grrrrr mentions - myself and a fellow mate/P38 owner have managed to make an RF filter which does a similar job to the expensive LR 3rd gen/green dot receiver, but at a fraction of the price. More information can be found on my website:
www.p38webshop.co.uk Though they are out of stock at the moment as we have sold all of the last batch and trying to find some time to assemble and test some more!