I have read there is a dash dimmer, for adjusting the brightness of the speedo etc. I have a 2007 UK spec Tspirit but for the life of me I can't find it. Was it included on the UK spec model? If so where is it?
Down and to the left of the steering wheel for the US version. Might be opposite for you. Only has an effect when the headlights are on. Image borrowed from this thread: EV button like switch | PriusChat
No it's totally different for the UK T-Spirit, and yes, it is in the manual. It should be the right most button under the MDF, and it has two jobs. It has a symbol on it that I think is supposed to look like a speedometer. Job one is dimming the dash and MDF -- quick presses. This only works when the headlights are on. Job two is toggling the speedo display between km/h and mph for use in Eire and Europe -- press and hold for about 2 secs. hope this helps.
I wish there were separate dimmer controls for the head unit. I know the brightness can be set in the menus, but a separate knob would actually be convenient.