FL2 terrain response has 4 settings. The different settings allow the FL2 to optimise the traction control. Fer eggsample certain conditions require less wheel spin, so it responds quicker to wheel spin to counter this by pulse braking the spinning wheel quicker than it normally would, etc.
From the FL2 owner manual:
General Program driving mode
This program is compatible with all on and off-road conditions. If not already active, it should be selected before driving on surfaces which are similar to a hard road surface. Dry cobbles, tarmac, dry wooden planks, etc., all fall into this category.
This program should be selected once the need for a special program has passed. Once the special program has been deselected, all of the vehicle's systems will return to their normal settings, except Hill Descent Control (HDC). HDC will remain active, if it was selected
manually.
Grass Gravel Snow
This program should be used where a firm surface is covered with loose or slippery material.
Note: For deep gravel, it is recommended that the Sand program is selected.
Note: If the vehicle is unable to gain traction in deep snow, switching Dynamic Stability Control (DSC) off may help. DSC should be switched on again, as soon as the difficulty is overcome.
Mud Ruts
This program should be used for crossing terrain that is muddy, rutted, soft, or uneven. Hill Descent Control (HDC) is automatically selected with this program.
Sand
This program should be used for terrain which is predominantly soft, dry sand or deep gravel.
Note: If the vehicle is unable to gain traction in extremely soft, dry sand, switching DSC off may help. DSC should be switched on again as soon as the difficulty is overcome. If the sand to be crossed is damp/wet, and sufficiently deep enough to cause the wheels to sink into the surface, the Mud-Ruts program should be used.
Freelander 2 terrain response:
I think it's against the law to be able to switch oft DSC on cars. I think when it's said to be switched oft, because yer pressed the oft button, what it actually does is desensitise it instead.