Land Rover Defender 2.4TDI 2011

Peter,
It’s a ripper! The difference is amazing hopefully I will also notice some fuel savings along the way.
One question on the handset when I was doing the install it asked if I wanted to install the Bluefin , or Extras , I obviously installed the Bluefin , what are the extras and should I install them ?
Thanks again I am very impressed.
Thanks for your help along the way.
Cheers
Rick