VCDS or decent diagnostic that can see what is going on. This can also test the compressor and tell you the output. There is a label file on here specifically for that.
Are the suspension lights lit up on the dash?
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2008 (facelift) S8 with B&O, ACC, glass sunroof, reversing camera, front and rear heated seats, ceramic brakes, homelink, electric side and rear blinds, ski load through, heated fan washer jets, remote boot closing, de-flapped manifold, fridge, umbrella holder
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