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City lights vs Daytime running lights. Difference? (archive)

[ Follow Ups ] [ 5-series (E39) Message Board ] [ Msg. Board FAQ ]

Posted by David Zeckhausen on February 04, 2001 at 21:02:47:

My 2000 540i is set up so the highbeams run at a reduced output when the headlights are off. It's called Daytime Running Lights (DRLs). Can someone explain the functional difference between these and the "City Lights" that a few folks have installed? I realize that city lights use an additional bulb. But I don't understand the functional difference between them. In both cases, the high beam unit glows at reduced output when the headlights are not on. Right?

Dave Z.


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