So now that my oil leaks are all fixed I am moving onto my chirping noise coming from my a/c compressor/pulley area. It only makes noise when the a/c is on but I am guessing I should replace the belt, roller, tensioner and spring?

Anything I am missing or am I not addressing the problem here?

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1999 E300 TD 190,000
1996 Passat TDI 225,000-sold
1996 E300 120,000-sold
1998 Jetta TDI 186,000 -sold
1983 Chev Suburban C20 6.2-sold