Having visited the Hella website re. aircon. systems, the fact that the majority of new cars now sold in the UK have aircon. as standard is presented as an opportunity to the trade, due to service requirements and the high frequency of failures (note that this is directly from the suppliers to Ford, VW, Seat, etc.)!! However, it goes on to emphasize the importance of annual servicing. This should involve: 1) Visual inspection of all components. 2) De-gassing the system and measuring the amount of charge removed. 3) Subjecting the system to a deep vacuum to check for leaks and remove any moisture. 4) Re-gassing the system, appying UV dye and putting in the correct fill of oil to lubricate the compressor. 5) Replacing the filter / drier every 2 years. 6) Disinfection of the evaporator. 7) Replacement of the pollen filter. I guess that 1) and 7) should be DIYable, and 6) probably does not affect system reliability. If this is done, the system reliability should improve considerably. It appears that manufacturers are offering aircon. as standard on more and more of their models, but are not putting any preventative maintenance schedules in place, presumably to avoid having uncompetitive servicing costs (after all, when negociating a fleet deal, warranty costs are probably ignored!) So, I intend to have my system serviced annually (probably in the spring), if I can find a local aircon. specialist who doesn't charge the earth - does anyone know of one in the Stoke-on-Trent area? A commercial vehicle specialist would probably be better, as they tend to have far, far more knowledge and experience. From what I've read, it appears that aircon. systems give trouble whatever the make of car (although I suppose the Japanese are probably better than most), and that much of the expense is due to poor or non-existent maintenance and the usual woefully poor knowledge and workmanship by the average main agents.