I am near of ordering a MY2015 HSE and it has the ACC option which is a deal breaker for me.
But LR does not have much information on the system. Is it the most simple ACC kind or does it have some extra features such as que control or emergency breaking? My Jeep have possibility to break if in cruise control, otherwise it warns when it feels I need to break.
How is the system feedback in the instrument?

 

It will notify you, and will apply the brakes, however it will not bring the vehicle to a full stop, and it is not designed for collision impact reduction, as the system in the L405 and L494 are.

See attached, and your dealer should have been able to provide you with this information.

 

The deal here in Sweden have not yet sold any 2015 so they have not gotten all the material yet.

Does the system warn for breaking when not on cruise? My Jeep does this but it does not break but still its a nice extra feature.
How is the feedback in the instrument?

 

I have not used it on a '15 LR4, as they're not released yet, but if it is the same integration as the earlier L320 system, there are two systems that are used. The actual ACC system, and a Forward Alert system.

The Forward Alert has a separate switch to turn on/off, and is automatically switched off when ACC is active, but will give a message that driver intervention is required, no braking is preformed by Forward Alert. Forward Alert is designed to revert to the on/off state of the previous drive cycle, so leave it on, and it should always be turned on, unless ACC is active.

The warning is decent, but not overly intrusive, so if neither paying attention to the vehicle, or the road, it may not help.

Again, this is based on the L320 system, not sure if the new L319 will have the same integration of Forward Alert, and the ability to turn the system on/off.

 

Dont know if they changed the brochure or if did not read carefully but it says it includes a forward alert system so I would guess it works like you mentioned. Not a total automatic braking but still better than nothing at all.