Mercury Sable Oil Change

2002 Mercury Sable 47616 Miles Hello, I Was Driving My Car Yesterday And The Engine Light Came On And Hasn't Gone Off Since.........

Replacement Of Acc Hose,evap,manif.tube Assy,freon Flush Oil Change Including Labor.charge Was 726.08.is This A Reasonable Charge? ($380)...

Should I Add Pag Oil 46 After I Vacuum Down And Just Before R134a Goes In? I Know That My Ac Compressor Is A Factory Air Fs10. I Think The...