Sorry man I am not really into retrofitting, but rather unleashing hidden features in my car. And coding turns out to be something that can do wonders in this regard.
So far what I have done is:
1. Enable Day Time Running Lights - and found out the AEs are brighter in DRL mode vs. with the low beam!
2. Digital speedometer
And I have the info now to try the following over the weekend
1. DVD Video in motion (and when idle too for that matter, as HK BMWs has this totally disabled from factory)
2. Enable iDrive to display DRL feature so I can switch DRL on/off whenever I want
3. Increase AE brightness for both DRL and low beam modes