Very faint buzzing / humming from driver side dash area - Benzworld.org - Mercedes-Benz Discussion Forum

MLCrusin · 11-13-2009, 04:08 PM

Hi Everyone,
Ive had the car a few days and all of a sudden this morning my whole passenger door functions were not working, (windows, seats, heated seats). When I inspected the fuse box (but Not thinking that it was at all related), I replaced what I discovered to be fuse #39 to be missing from front passenger fuse box. Long story short replacing this fuse has now made the passenger side functions work. Coincidence? It's weird because I didn't think #39 had anything to do with these functions. NOW however that I have replaced the fuse, there is a very faint BUT ANNOYING buzzing noise coming from the driver side dash area. THIS WAS NOT THERE when fuse #39 was still MIA. It goes away once the night security illumination/instrument cluster shuts off though. I checked with the dealership and the recall campaign has been performed on the instrument cluster. I'm wondering if perhaps all this time when fuse #39 was missing and another fuse was carrying the load, that it finally today gave up causing the passenger malfunction, and that maybe that mysterious other fuse is now feeling a voltage imbalance since now the fuses are complete? Any help is appreciated. Because of the economy, this is my first used car in years, and I'm really hoping for a pain free experience, and I'm trying to do all that i can myself, and am extremely thankful for any assistance any of you can provide.

Thanks!

lyoooha · 11-14-2009, 08:08 AM

Is it coming from the instrument cluster?
If it goes away after instruments shut off, than probably so.
Try turning brightness up see if it goes away, mayb low voltag3?

MLCrusin · 11-14-2009, 11:27 AM

Hi! thank you for the reply. I believe it was coming from the instrument cluster area. Great idea, I'll try and adjust the brightness to see if it helps!

**Skylaw** · 11-14-2009, 12:04 PM

It could also be from the problem discussed at post #2, http://www.benzworld.org/forums/w220...ound-dash.html.

One of the aspirator motors is in the overhead console, near your cell phone microphone; the other is in the right hand (passenger) A/C control panel.

MLCrusin · 11-14-2009, 12:19 PM

Thank you for the suggestion Skylaw, i'll definitely be looking into this as well!