Oh, and I forgot... if you have not yet cleared the DDE errors, do so first. It's possible that if the DDE has a fault code for the aux fan, it will not activate it. Your error message reads "ERROR RELAY ADDITIONAL FAN" so it seems likley the DDE has a fault code for the Aux fan and therefore returns the listed error.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)