[Blacktan]

Holla guys ,
I own an f20 mpack 116i with PDC front & rear and auto pilot with brake assistance .
I used to work auto pilot with brake assistance to my father's e65 745i with car auto brakes when the front car brakes also and keeping distance from the front car as requested (10m , 20m etc)

Now i can't find how brake assistance in f20 activates ?
Anyone knows ?
Or it is just brake assistance for marketing tricks ?

Thanks !