sounds like an electrical issue. I've been having sporadic issues. luckily nothing to do with headlights.. but one day i got in my car at lunch and all my hazards were blinking.. last night i tried to use my remote to open my doors.. and nothing. used key, then tried again.. and it worked. Nothing too bad for me to bring to the dealer - but good luck with yours.

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2005 LeMans Blue e53 4.8is
MODs
///LeMans Blue RBs///Intravee II///Sirius///ACS Spoiler///AiB v3///HID Fogs///LED Tails///
///215 20" Ferric Gray///MTEC Pedals///DVD Headrests///SMG M Wheel///AFE CAI Stage 2