*UPDATE*

I just had a look at PAC's instructions - which say to cut the SW/RT/GE (or SW/GR/GE - white/grey/yellow) in half!! And they say to do this in the steering column, as per what bhennrich said above.

DON'T cut the SW/RT/GE wire in half anywhere else - stuff will stop working...

It's odd the connect the steering wheel controls in the manner that PAC suggest - most units tap into the data bus and extract the appropriate control data from the data stream. I guess the PAC unit needs complete access to the controls, so it might be best to track down the SW/RT/GE (or SW/GR/GE) wire in the steering column as they suggest.

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