It's not so directly said here but DME won't allow compressor activation if there is active code for aux fan which is monitored and PWM cotrolled.
https://www.pss-autosoft.net/diagram...-001645001.htm
https://www.pss-autosoft.net/diagram...SO-6450002.htm
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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey
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