Nial,
If you are up on the Sunny Coast you can borrow my laptop and BMW scanner 1.4 or try Carly app on my phone with bluetooth adaptor. My doors have always opened with one press and I don't have folding mirrors so no first hand coding experience with either of those options.

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Neil

2016 X5 3.0D
2009 X3 3.0D
2005 X5 3.0 Diesel Sport (sold)
2007 320i (sold)