New member from houston
Thread Starter
Newbie
Joined: Jul 2017
Posts: 4
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02 s430
New member from houston
I have a w220 s430 that my voltage keeps dropping .. ive replace 3 altenators and 2 baterries in 2 months. Ive checked the x4 box and no blown fuses in front or back in the trunk any one onow what may be the problem
thanks in advance
thanks in advance
Super Member
Joined: Apr 2016
Posts: 889
Likes: 148
From: Southern Illinois
, 2023 BMW X4, 1991 190E
Cant help, but welcome to the club. Hopefully, someone can assist you.
MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,473
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
"I have a w220 s430 that my voltage keeps dropping..."
No immediate answer, but perhaps a few questions will lead someone to a viable suggestion.
Do you mean that the system voltage will intermittently drop to a lower voltage reading, and then go back to a proper reading?
Or, do you mean that the system voltage was originally 14.4 vdc, then it was 13.6, then 12.9, etc.?
How and where are you measuring the voltage?
What is the voltage?
Does the voltage vary with differing conditions? How?
Are there any other symptoms, such as flickering lights, fan speed dropping, slow starter speed, etc., etc.?
Has any work been done to the car recently?
No immediate answer, but perhaps a few questions will lead someone to a viable suggestion.
Do you mean that the system voltage will intermittently drop to a lower voltage reading, and then go back to a proper reading?
Or, do you mean that the system voltage was originally 14.4 vdc, then it was 13.6, then 12.9, etc.?
How and where are you measuring the voltage?
What is the voltage?
Does the voltage vary with differing conditions? How?
Are there any other symptoms, such as flickering lights, fan speed dropping, slow starter speed, etc., etc.?
Has any work been done to the car recently?
MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
Houston got some huge rain didn't it ? These cars get damaged in the rain
Your car probably has water damage under the carpet which is destructing your electrical system
see here
https://mbworld.org/forums/s-class-w220/265605-2nd-s-flooded-week-s-owners-keep-your-drains-clean.html
Your car probably has water damage under the carpet which is destructing your electrical system
see here
https://mbworld.org/forums/s-class-w220/265605-2nd-s-flooded-week-s-owners-keep-your-drains-clean.html
Thread Starter
Newbie
Joined: Jul 2017
Posts: 4
Likes: 0
02 s430
The car started at 14.2 v then it will decrease to 13.8 ,13.4 , 12.7 all the way to 9 volts . This will happen with time not in 1 one day im cheching the voltage in the ac panel were you have to hold the rest button and go to number 24 ... something is killing my batteries idk what is it all my sams seem fine i have the i carsoft scanner and nothing shows
plz help
plz help
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MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
The navigation system and alarm siren box are two common causes of drain
have you removed the nav disc and pulled fuses ?
You can get a "remote battery disconnect " on Amazon for $49 to stop battery drain with the click of a keyfob remote until you pinpoint the issue
have you removed the nav disc and pulled fuses ?
You can get a "remote battery disconnect " on Amazon for $49 to stop battery drain with the click of a keyfob remote until you pinpoint the issue
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