I have B7 S4 with the multicolored DIS (not the all red one) and I was looking for LED city light replacement bulbs for awhile and everyone I found required a separate resistor to be installed for the error code. I just installed the HPX 194 White LED bulb yesterday and they look great. The bulbs are very bright. They simply just pop in and do not throw an error code what so ever. Just figured I would post the link for anyone who was looking. Just make sure you select the CANBUS version which has the built in resistor. The link is below, enjoy.
http://www.highperformancebulbs.com/hpx194ledbuw.html
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