Turbo blows very loudly….

halöle… about 3 weeks ago I noticed that my turbo (car: s60 mj 05 d5 163ps 160 000km) quite loudly abbläst (kissed) once you notice that twice as much and you always pay attention to it… I actually didn’t notice any difference in performance and it is also normal that the turbo a bit whistles and hissssssssssssssssssssssssssssssssssssssssssings but as strong as this is now I can’t imagine that everything is normal… 3 days ago also came the error message “motor maintenance” but this one was gone after the engine started again and didn’t come anymore… now my questions: -is the turbo easily accessible so that you can look for torn down hoses?(I came in front of the turbo behind the engine block and so very unfavorable) but I didn’t explicitly look after it yet… -how would your remote diagnosis be? wish all still nice day/evening and thank me already