This message recently came up on my 2001 E39 M5, and I was bewildered for the day why it came on, as I checked my side lights several times, and they were both working.
The other day I noticed the both rings around my front driver side lights both do not illuminate, so I gather that is what "check side lights" means.
My question is, do I just need to replace the rings, or do I need to replace the whole headlight piece.
Also, where would be the best place to replace these stock rings?
Thanks!