Does anyone know what this bloody thing does?

the thingie with the unknown buttonsWhen we bought our great petrol-guzzling poo-mobile the former owners were kind enough to not include the manual (we actually bought it from a garage, so we can’t exactly go round to their house and beat them about the head with a herring until they fork it over), so we haven’t got a sodding clue what most of the buttons in the damn car do, particularly the ones in the thingie above the rear view mirror.

Now I know Trace has one of these things and maybe some of the rest of you do too. So, I’m appealing to your better natures and community spirit – it’s a long shot, I know – PLEASE: tell me what the buttons do!