[doughboy]

I have it too, it uses an additional longer range light sensor behind the mirror to see oncoming lights and put on high beam or dip accordingly. You use the high beam stalk to put it on and you get a little 'auto' symbol on the dash. You can disable it if you want.

It's ok for unlit dual carriageways etc, but for typical British country roads and minor A and B roads its a liability IMO.

I find it has some dangerous issues:

1. It is a bit slow to dip and often dazzles oncoming cars who then flash you or don't dip either. Only a fraction slow, but that's all it takes.

2. It is a bit slow to restore high beam and leaves you unable to see after a car has passed for half a second or so.

3. It won't allow high beam below 30mph as it 'assumes' you must be in a built up area, so when you slow for a tight bend in a country lane or A road the damn thing dips your lights just when you need them most!

4. It often mistakes reflective road signs ahead for oncoming cars and dips your lights again just when you need them.

It can never be as good as a human because it has to wait until it sees the oncoming lights, whereas you can see them way off, reflected on telephone wires or hedgerows / barriers etc.

Also when you pass a car going the other way you would put high beam on at the exact time you pass the car, not wait a half second or so first.