Decided to change the silver plastic trim on my auto shifter for the M Performance carbon fibre version.
I was looking for a DIY guide, but couldn't find on on here, so am posting this for future reference.
In the box
First thing you need to do is to pry off the cover to reveal the torx screw. It's only stuck on with tape.
Next is to remove the torx screw.
And the cover will just slip off.
The 'unlock' button also just slips off and is needs to be reused on the CF trim.
Attach the CF trim in place with the new 'P' button and 'unlock' and secure with the torx screw.
Once done and happy stick the 'M' cover in place.
There is a slight difference with the 'P' button as on the CF trim it is a lot more recessed and doesn't protrude as much as on the original trim.