The Mégane II Owners' Club

Ya, planning to take it to the nearest Renault garage - but would like to have some idea of the what's involved

Was away for 3 days, car was unused, started it up & the heating/air con not working, there is a light on in heating display, but nothing happening. Brought it to my local garage (Non Renault) & said looks like a big job, will have to remove the front dash to investigate - Any ideas