Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > ML, GL, G-Wagen, R-Class, Unimog, Sprinter

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 02-27-2018, 08:17 AM
Registered User
 
Join Date: Sep 2005
Posts: 175
ML350 battery drain puzzle

Have a 2004 ML350 with a battery drain issue I can't figure out.
Battery (1 year old) and alternator have been tested and are good. I had a current draw of 1 amp after being shut off for 30 minutes. I pulled all the fuses one by one and no change in current draw. I disconnected the seat modules and also no change in current. I disconnected the tele-aid box and the current draw goes from 1 amp to .46 and then to .03 amps within a 1 minute time frame. If I connect my ammeter probes again the current goes through the 1 amp to .03 amp cycle again. I have left the tele-aid box disconnected. Battery is still draining after 12 hours so that I can't start the car. As I understand it this model of ML350 does not have a SAM. I also checked the alternator to make sure there was no back flow of current due to a bad diode.
No lights are left on etc

Anybody have any ideas????
Reply With Quote
  #2  
Old 02-28-2018, 06:39 AM
optimusprime's Avatar
Trevor Hadlington
 
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,206
. The fuse for the radio needs pulling out ,just to see if its the radio .But dont do this if your radio is coded .And do you lock the car at night so it closes the computers down .You could take a fuse out every nigh to close items down , then it would show up eventualy the culprit .Lots of checks on youtube videos for voltage drain .
Reply With Quote
  #3  
Old 02-28-2018, 07:14 AM
optimusprime's Avatar
Trevor Hadlington
 
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,206
I come up with the same as you --no sam in 2004 ml350 2005 did have one in the rear ,. Go to youtube and put in the search box -- --- The Trainer #26 Using Volt Meter to find - Key off -Battery Drain .
Reply With Quote
  #4  
Old 02-28-2018, 08:54 AM
Registered User
 
Join Date: Sep 2005
Posts: 175
I don't lock my car at night. I live in an area where I don't lock the cars and sometimes keep the keys in them. So the computers will stay in the awake mode if the car is not locked? Has aftermarket radio in it and I have pulled the fuse to it with no change. I had the battery tested at Advanced auto and they said it was good but needed a charge. I then had Walmart take the battery out and run a test and they said it was bad and would not hold a charge so I bought a new battery yesterday. Will know if that was the issue by tomorrow.
Reply With Quote
  #5  
Old 03-01-2018, 04:40 AM
optimusprime's Avatar
Trevor Hadlington
 
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,206
You will get a drain if its not locked. .The car needs sleep mode
Reply With Quote
  #6  
Old 03-01-2018, 12:03 PM
ILUVMILS's Avatar
Senior Member
 
Join Date: Sep 2002
Posts: 2,589
Quote:
Originally Posted by optimusprime View Post
You will get a drain if its not locked. .The car needs sleep mode

No.............
Reply With Quote
  #7  
Old 03-01-2018, 06:51 PM
Registered User
 
Join Date: Feb 2007
Location: los angeles
Posts: 590
Check in fuse box near rear lower part there is a small fan used by aam to cool the module box , I think its powered by aam and not a fuse , unplug it, usually radio is common culprit also
Reply With Quote
  #8  
Old 03-02-2018, 04:58 AM
optimusprime's Avatar
Trevor Hadlington
 
Join Date: May 2014
Location: Worcestershire in England
Posts: 1,206
info

Quote:
Originally Posted by ILUVMILS View Post
No.............
Please give us your explanation then, not just NO .
Reply With Quote
  #9  
Old 03-02-2018, 09:45 AM
Registered User
 
Join Date: Sep 2005
Posts: 175
Could you clarify where the cooling fan is located? My fuse box is under the hood, drivers side and also one in the kick panel passenger side. Is the module box you are talking about by the fuse box?
Reply With Quote
  #10  
Old 03-02-2018, 09:51 AM
Diseasel300's Avatar
Registered User
 
Join Date: May 2016
Location: Texas Hill Country
Posts: 4,653
Quote:
Originally Posted by optimusprime View Post
Please give us your explanation then, not just NO .
No means "no". Leaving the car unlocked will NOT kill the battery. How about you give your source and prove him wrong? Most people leave their vehicles unlocked in the garage (and a lot of other people simply leave their vehicles unlocked!). Pretty sure we'd have heard about Mercedes issuing a recall by now for batteries being drained from doors unlocked... They'd certainly be the only manufacturer to have that problem.
__________________
'11 Honda Accord EX - "The Daily" 64K
'83 500SL Euro - "The Money Pit" 116K
'91 350SD - "The Diseasel Jr." 168K
'86 300SDL - "The Diseasel" 189K (Totaled 1/31/19)
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
Reply With Quote
  #11  
Old 03-02-2018, 12:04 PM
ILUVMILS's Avatar
Senior Member
 
Join Date: Sep 2002
Posts: 2,589
^^^^
Thank you. Dis300
Reply With Quote
  #12  
Old 03-05-2018, 10:16 AM
Registered User
 
Join Date: Sep 2005
Posts: 175
Turned out after a new battery the tele-aid module was the culprit. Pulling a steady 1 amp. Disconnected and the current draw is .03 amps. After disconnecting the module the SRS warning light is on now.
Reply With Quote
  #13  
Old 03-09-2018, 11:13 PM
Desert Panther's Avatar
Dieselicious
 
Join Date: Oct 2011
Location: Avra Valley, Arizona
Posts: 191
Question

Quote:
Originally Posted by 240diowa View Post
Turned out after a new battery the tele-aid module was the culprit. Pulling a steady 1 amp. Disconnected and the current draw is .03 amps. After disconnecting the module the SRS warning light is on now.

Curious if that means your SRS is now compromised or disabled somehow?
__________________
2007 Dodge Ram 3500 Cummins Turbo Diesel 4x4
2002 CLK 430 Cabrio - moneypit project car
1994 GMC S-15 pickup 4.3 5MT
1985 300 SD
1978 300 CD
1962 220-S Fintail - awaiting restoration
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 01:06 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page