Today, on an almost empty motorway, I used cruise control for the first time. It went ok, but…. After a time an amber light came on the dash. Then occasionally the speed dropped, before returning. The light was steady, then intermittent. I got worried, and turned the Cruise off. I have watched a utube tutorial, but it talked about hitting a steering wheel button that I haven’t got. Is it working ok ? 2013 SDV8 4.4 SE Luxor.
1960 Series 2 88 inch diesel.
1955 Series 1 86 inch petrol.

The amber light is meant to come on when you are behind and within (a button adjustable) range of a vehicle in front. If this light came on when you definitely had nothing in front of you then it may indicate a fault. Otherwise worth having another try to get used to how it works. 2016 SDV8 AB

Doesn’t the light show it’s in “follow mode”. Think my L322 has a light… must be similar…

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

You have adaptive cruise control by the sound of it. The amber light comes on when a vehicle in front of you comes in range of the radar from your car, it will then begin to adjust the speed of your car to match the one its following keeping a pre-set distance, which you can change with the steering wheel control toggle. It will stay at the set distance until you move to another lane or override with the accelerator or brake. It takes a bit of getting use to to be honest, and always be ready to override it just in case it decides not to see the car in front, which it does occasionally do causing a trouser moment, but overall its very good.

I’ve never had a problem with mine not seeing a car in front but little things like motorbikes can fool it

Only does it rarely, usually when the car in front swaps in traffic, but works fine 99% of the time, maybe needs calibrating.

On mine, if I want to temporarily disable the adaptive CC I hold down the button that reduces the gap for about 3 or so seconds. The orange display then changes to white with 'off'.

I find ACC useful sometimes, but for example when I'm towing at 60mph in lane 1, my car will lock on to a slower vehicle in front and if I'm not watching my speedo I end up not making as much progress as I want! 2017 SDV8 Autobiography