This is probably a daft question, but can anyone tell me if the red & blue bars surrounding each of the temperature selection rotary controls on my MY10 TDV8HSE should be illuminated when the instrument lights are on? I could swear they used to be, but they're not now. All the other instrument and switch lights seem OK.

Thanks in anticipation. 14.5MY SDV6 HSE Dynamic Indus silver/lunar/ebony 20" wheels, InControl, full-size spare, electric tow bar, adaptive xenons, adaptive cruise control, auto main beam assist. Gone: TDV8 HSE; Zermatt silver/ebony, 19" off road alloys, active diff, particle filter, tow pack (it was fun) BMW 730D SE (great car, sadly missed). Ford Focus RS mk2, Ultimate green, lux pack 2, bluetooth. The start of my mid-life crisis.
IN THE GARAGE: BMW i8 - the mid-life crisis continues and it's great fun.