The VDO dials on the new GDIs and the Plus 8 have a white light that may well be LED.
The under dash dimmer seems, as ever, to have about three settings:
Off
Bright
Something in between...
On my BMW there is a similar control, but it produces a gradual change from dim to bright.
On my MacBook there are buttons that change the brightness of the screen (F1& F2)in a similar way and a separate set of buttons (F5 & F6) that alter the brightness of the lights in the keys...
How hard can it be?