when set, a green light on the speedometer lights up - near the middle but offset to the right.
also, but intermittently, again near the middle but offset to the left, is an orange light with a picture of a car and a two headed arrow behind it.
can't find an explanation in the manual as to what this light indicates.....i did think it meant the radar was keeping a gap inbetween my FFRR and the vehicle in front.
but the orange light seems to come on and off as it pleases.

anyone know exactly what it means?

It shows when the car is actually sensing another vehicle in front and is actually physically slowing the vehicle, if the vehicle in front speeds up and goes out of range then this light goes out but the green one stays on to show the system is still in use. Agueroooooooooo. 93-20
I swear you will never see anything like this ever again....watch it..drink it in.

thx Pfazz
was playing with it yesterday
found the orange light comes on when it senses another vehicle in front in the same lane.......but i am guessing the system also senses other vehicles in front but not in the same lane?
the light was on was my vehicle was cruising, braking, and accelerating.

The orange light indicates it has detected another vehicle in front....can be super sensitive though and is a bit irritating if for example you are using ACC overtaking at 70mph a lorry doing say 50mph on the outside lane of a dual carriageway particularly if going round a long sweeping bend as it tends to pick up that lorry and puts the anchors on just at wrong time...the only way to get past is to overide the system by pressing the accelerator again, a small irritation in an otherwise useful feature IMO

^^^^^^^^^^^ Very much this! Agueroooooooooo. 93-20
I swear you will never see anything like this ever again....watch it..drink it in.