Bimmer is so much easier in this respect - the option is already there, you just need to code it. JDM versions have decoded DRLs but Euro and US have them coded and all you need to do is just to change a few parameters to activate the DRLs, can even pick how bright you want them or whether you want to have the rear lights on too. Can also choose what lights you want to act as DRL: low beams, spots, squid rings or a combination. Pretty cool and no we're not talking the latest models, I've successfully coded a 2007 E93.