Where they state a 'software update', unless they were actually updating the CCM firmware or byte controller with supporting ECU components, I'm still not sure it would be something that VCDS couldn't do?
I believe it is a firmware update for the CCM, as the dealer has to hook the car upto the VAS then update from Germany, simple coding changes the dealer wouldn't have to connect through to Germany do this.
The MK6 'look' has been achieved by a geezer in the US on his MK4 .:R32 believe it or not, but, the significant difference was that he bought a BMW headlight controller (of some sort) and connected it to his high beam bulbs, then ran them at around 50% brightness giving that effect.
I too have been thinking about doing the DRL using a type of load reduction relay, but struggling to find suitable wiring diagrams for the relay.(Not BMW). Also theres the issue of the lamp monitoring, if that would keep throwing up a bulb out message.
I don't know much about the MK6 bulb setup - is the DRL bulb the same as the high beam bulb (which I believe is some sort of H15 bulb)?
The H15 bulb in the Golf MK6 is a dual filament 15W/55W. So the DRL uses the 15W and the High beam uses the 55W.
http://www.autobulbsdirect.co.uk/H15-Replacement-Halogen-Bulb.html