I have a 98 s500 and recently i noticed a buzzing sound. It seems like it is coming from the console over head that has lighting and sunroof controls(sort of a vent looking thing).

Its not constant. No real consistency as far as i can tell. Sometimes stays on after key has been removed from ignition for up to 5 minutes.

Anybody encounter this issue? Just bought this car maybe 6 months ago and only noticed it in the past few weeks.