2000 ML320. Intermittently, upon starting the car, there has been a strange buzz/beep that does not sound like a buzzer or beeper should sound (I know, sounds dumb). Anyway, it did it the other day for about a minute straight and the SRS light never went off. I wish I could identify the sound better, but it just doesn't sound like something that should be making noise at all. It's kind of a sickly buzz/beep.

Anyone had experience with this?

I've got it slated for an appointment on the 5th. I have also had to report a door lock actuator making noise, rear door glass popping in its track when rolled up, and driver door glass rattling in frame when half way down.