The nobs for my heating have all of a sudden stopped lighting up. First of all i gave my dash a whack, and they came back on but now they just wont light up. Any ideas?
Sounds like a loose or corroded connection to me. Your best bet is to take the dash to bits (Haynes manual tells you how, have you got one?) and have a look at all the connections to the dash lighting. Take all the connectors off and see if they need cleaning - use Scotchbrite (i.e. those plastic pads for cleaning pans etc) to polish the contacts up and put a little WD40 on the contacts too
if its a mk1 and you just want to remover the middle bit of dash where heater controls are theres more than 2 screws, 1 is hidden behind the middle knob