All the specialists can do the ayc fluid change for you its not expensive, not sure about doing it DIY though, there is a tool you need to reset it.

Buy an Rs model and then you dont have to worry about AYC, they drive better without it and its one less thing to go wrong (and the AYC pump will need replaced at some stage I have had to change them before on MR models at less than 50k miles even with fsh).

2nd hand pumps are about £400 and easy to fit but think you might need a special tool to reset the system.