Noise that keeps going with batteries unhooked?
Thread Starter
Member
Joined: Mar 2011
Posts: 219
Likes: 26
2011 E350, 1998 ML320
Noise that keeps going with batteries unhooked?
I heard an odd noise this morning, when I investigated my 2003 E320 was completely unresponsive, and making a loud noise that sounds kind of like a hundred crickets on coke. I unhooked BOTH batteries, and to my surprise the sound continues unabated. Any thoughts? I have (hopefully) attached a sample of the noise.
Super Member
Joined: Apr 2007
Posts: 633
Likes: 48
From: USA
2006 E320 CDI
I heard an odd noise this morning, when I investigated my 2003 E320 was completely unresponsive, and making a loud noise that sounds kind of like a hundred crickets on coke. I unhooked BOTH batteries, and to my surprise the sound continues unabated. Any thoughts? I have (hopefully) attached a sample of the noise.
Thread Starter
Member
Joined: Mar 2011
Posts: 219
Likes: 26
2011 E350, 1998 ML320
So when I came back from work, I removed the two batteries and brought them into my shop to recharge, and test. Main (trunk) battery was down to 8.5 volts, front aux battery was holding up at 12.5. This has to happen of course when I am working 12 hour days, and about to fly out for a week away, so a slow motion diagnosis and repair it seems. I did notice the day before this occurred, my car kept grabbing my incoming phone calls when I was in the house, even though I hadn't driven it in over 24 hours. Apparently is was somehow kept "awake" and drained the battery. I also noticed that for the past week, once or twice it threw the "electrical consumers turned off" notice in the dash. It usually does this if it doesn't start right up for some reason, but since everything was working, and the car started right up, I ignored it. I fly out to Alaska for a week, when I return I will see if the now fully charged battery drops voltage at all sitting on the workbench.
Super Member
Joined: Apr 2007
Posts: 633
Likes: 48
From: USA
2006 E320 CDI
So when I came back from work, I removed the two batteries and brought them into my shop to recharge, and test. Main (trunk) battery was down to 8.5 volts, front aux battery was holding up at 12.5. This has to happen of course when I am working 12 hour days, and about to fly out for a week away, so a slow motion diagnosis and repair it seems. I did notice the day before this occurred, my car kept grabbing my incoming phone calls when I was in the house, even though I hadn't driven it in over 24 hours. Apparently is was somehow kept "awake" and drained the battery. I also noticed that for the past week, once or twice it threw the "electrical consumers turned off" notice in the dash. It usually does this if it doesn't start right up for some reason, but since everything was working, and the car started right up, I ignored it. I fly out to Alaska for a week, when I return I will see if the now fully charged battery drops voltage at all sitting on the workbench.
