I have had my car serviced today in Maidenhead, by Mark Shead. Mark works for himself under the name of M A Developments, but he is extremely well priced and knows more about cars than you can imagine. I sure that will be endorsed by anyone else who has met him.
So he has the MUT-II then? or does he get a Mitsubishi dealer to change and bleed the AYC fluid?
I'm not trying to knock his skills but you need the MUT-II diagnostic tool to bleed the air fully out of the AYC system when changing the fluid. Get him to do the service and if he hasn't the tool then get Mitsubishi to change the AYC fluid afterwards.