The ARV is a valve on the side of the compressor. If your compressor housing has some vaccum lines running to it it has ARV. I would just disconnect it, or replace it with a non-ARV compressor housing though.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine