the dash light is really easy , below the see through panel there is 2 allen key nuts just undo them then it will slide out towards you but be aware there is about 5 connectors on the back and some are not the longest so be carefull . it will help if you lower your steering wheel to allow the pod to slide towards you easier its really just 2 allen keys and it locates on 2 pegs at the rear of binocle .
The heater control light is a bit more involved. From memory....you have to remove the ashtray and look for the screws there, then look for the heater panel screws. The bottom of the panel should pull away from the dash to unclip the top part.
Putting it back together is a pig, be careful to get it right or you'll break something like I did!!!
Hope someone can be more specific 'cos its a while since I did this.