mine is an 04,never touched or topped aircon,still works fine,i do run it in winter every month just to keep things tickerty boo
Well, mine was completely empty of gas when they looked at it. Now they didn't know if it was either a leak or had never been filled, but it seems that if for example your systems needs 450 grams of gas to fill, but 200 to run, during manufacture they will only put in the bare minimum to make it run, meaning that it doesn't need much to leak before your compressor will not run.
When I asked about an extended pressure test they suggest I keep using it and if the gas leaks out they will investigate and fix under warranty....
I think its Kwik Fit who will regas your aircon & if it don't stay cold they will refund you. You can also buy diy regas kit from Halfords. I would have thought though that if gas has leaked out then aircon will need more than just a regas to keep working. The gas does not leak out over a period of time as a matter of course.