90 Quattro 20V L5-2309cc 2.3L DOHC (7A) (1990)
5. Read temperature from center when A/C compressor clutch disengages (D on graph)
6. Compare temperature with temperature curve you have chosen on graph.
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A/C compressor clutch must disengage at point indicated on graph for the temperature curve you have selected (your base measurement) + 5°C
(9°F) tolerance.