I had my Aircon compressor changed due to a Ford recall, for some reason they fitted so many with Mondeo compressors & they made an awful sound, Lucky really I had my ST booked in to get the Vbelt tensioner replaced as that is what the dealer thought it was the recall notice came through before they did it.

Anyhoo the Aircon is not quite as good as I think it should be, apparantly the unit is on a clutch system whereby when you boot it the Aircon cuts out so you don't loose power from the engine, damn thing just cuts out & in whenever, Dealer can't or wont fix it.