Air conditioning disinfection, where and cost?

Hello, with our V70 Mj01, it smells very unpleasant when you turn on the climate. now I think that I have the climate disinfected and you should then look immediately after the cold mitel. Where have you made good experiences with it so far, should I have this done at the friend and what does it cost there? I happened to be at the Bosch service today and they want to have 80,00 € plus material. Is there actually a benchmark how many times you should do this? mfg vovlomm18