Jun 10, 2015, 12:55 PM
Last edit by: IB Advertising
See related guides and technical advice from our community experts:
Browse all: Electrical Guides
- Mercedes-Benz C-Class AMG: Why Does My Battery Keep Dying?
Guide to diagnose trouble and recommended solutions
Browse all: Electrical Guides
Battery Keeps Draining
Thread Starter
Newbie
Joined: Dec 2010
Posts: 13
Likes: 0
02 C230 Kompressor
Battery Keeps Draining
Hoping someone can help me here. My battery keeps losing it's charge. I have pulled radio fuse and let sit, door locks and let sit, etc. I have a bad electrical draw and cannot locate it to save my life. The MB shop could not find it either. Any suggestions as to what I might do? Thanks for all the help in advance!!!
MBWorld Fanatic!
Joined: Feb 2009
Posts: 5,537
Likes: 8
2006 C350 Sport 6MT
https://mbworld.org/forums/c-class-w...ml#post3068555
Senior Member
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Hoping someone can help me here. My battery keeps losing it's charge. I have pulled radio fuse and let sit, door locks and let sit, etc. I have a bad electrical draw and cannot locate it to save my life. The MB shop could not find it either. Any suggestions as to what I might do? Thanks for all the help in advance!!!
The the seat module wire have pulled/disconnected for a while now but it does not make a difference. I don't know if it still drains while disconnected.
Earlier today I pulled the power seat and cigar lighter fuse and see what happens...Pulling each fuse to find the drain will be my next move.
Trending Topics
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
I am pretty sure the 204 computer can show amps drawn.
If the 203 has the same it may help when pulling fuses to isolate the problem.
If the 203 has the same it may help when pulling fuses to isolate the problem.
MB World Stories
The Best of Mercedes & AMG
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
Banned
Joined: Aug 2010
Posts: 1,073
Likes: 1
From: North San diego
C320 2002
Newbie
Joined: Nov 2010
Posts: 8
Likes: 0
2003 c230 kompressor
hey dunno if you fixed your problem or not. But here is a way how I pin point the problem. Disconnect the ground from the battery. Get a multimeter, adjust it to amperage, and connect in series to the battery. You should get a reading of less than 0.1 amps, usually around 0.07a.
There is a delay, so wait about 20 to 30 sec for everything to settle down, and get the reading. Start by pulling fuses one at time and see where that leads to...no pun intended lol
hope that helps
Mike
There is a delay, so wait about 20 to 30 sec for everything to settle down, and get the reading. Start by pulling fuses one at time and see where that leads to...no pun intended lol
hope that helps
Mike
Senior Member
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
hey dunno if you fixed your problem or not. But here is a way how I pin point the problem. Disconnect the ground from the battery. Get a multimeter, adjust it to amperage, and connect in series to the battery. You should get a reading of less than 0.1 amps, usually around 0.07a.
There is a delay, so wait about 20 to 30 sec for everything to settle down, and get the reading. Start by pulling fuses one at time and see where that leads to...no pun intended lol
hope that helps
Mike
There is a delay, so wait about 20 to 30 sec for everything to settle down, and get the reading. Start by pulling fuses one at time and see where that leads to...no pun intended lol
hope that helps
Mike
Thanks for the tip Mike I'll do my "checks" this weekend.
As far as my troubles:
1st Took out fuse #s 27 & 38 Seat Adjustment Driver & Passenger/ #47 cigar lighter(Glove light)...Did not work. Not it.
2nd Fuse 3 & 9 Dome lights, # 64 Radio (aftermarket w/amp & subs)... I'll find out tomorrow a.m. if it works.
Battery: Autocraft Titanium 02/2009
Voltage: 12.31 sitting/OFF, 14.19 running @ idle, 13.92 running idle w/ all "creature comforts" turned on.
Senior Member
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
How old is the battery ? . It could be an internal battery fault
You could always c/o to another battery to see whether you have the same symptoms.
Also disconnecting the Neg terminal after use & reconnecting after a day or two to see whether the battery has discharged.
You could always c/o to another battery to see whether you have the same symptoms.
Also disconnecting the Neg terminal after use & reconnecting after a day or two to see whether the battery has discharged.
Senior Member
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Bought the batt in 2009.
Thanks.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
I would take it back to where you bought it & ask them to check it for problems.
It may still be under warranty .
Good luck & let us know how you go.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Hoping someone can help me here. My battery keeps losing it's charge. I have pulled radio fuse and let sit, door locks and let sit, etc. I have a bad electrical draw and cannot locate it to save my life. The MB shop could not find it either. Any suggestions as to what I might do? Thanks for all the help in advance!!!
briansbrowns,
Any luck in solving your problem?
MBWorld Fanatic!
Joined: Mar 2004
Posts: 1,175
Likes: 24
From: Boston, MA
'14 ML350, '13 C220 CDI, '07 C280, '98 ML320
Load testing can be done at auto parts stores for free.
Or,you can buy your own load tester for $20 at HarborFreight store.
http://www.harborfreight.com/catalog...ry+load+tester
Or,you can buy your own load tester for $20 at HarborFreight store.
http://www.harborfreight.com/catalog...ry+load+tester
Senior Member
Joined: Sep 2006
Posts: 296
Likes: 0
From: FLORIDA
2003 C240
Thanks Glyn & Pcy.
Went to Advanced Auto to get the batt checked. Dead Cell they say.
Free replacement. In 10 days the warranty expires... Got lucky.
No warranty on the new one though.
Replaced it with: Autocraft Gold Part# 49H8
Cranking Amp @ 32 Degrees F 950
Cold Cranking Amp @ 0 deg. F 760
Reserved Capacity 160
Hope it's just the batt. and nothing else...guess i'll find out later.
Went to Advanced Auto to get the batt checked. Dead Cell they say.
Free replacement. In 10 days the warranty expires... Got lucky.
No warranty on the new one though.
Replaced it with: Autocraft Gold Part# 49H8
Cranking Amp @ 32 Degrees F 950
Cold Cranking Amp @ 0 deg. F 760
Reserved Capacity 160
Hope it's just the batt. and nothing else...guess i'll find out later.
Newbie
Joined: Oct 2010
Posts: 6
Likes: 1
From: Nottingham (England)
W203 Saloon 320 CDI
Last August i had the same problem the battery went dead overnight and just before i was going on holiday' I had the battery checked out and was told it was u/s.
I went out and purchased a new one at a cost of £105 and everything as been all right until a few days ago, i noticed if i left the car parked up for 2 days the battery had become flat again, So i have done a few tests but after 2 days it is flat again.
This morning i decided to go to my local MB garage and said can you put yout star diagnostics on it and find the problem?
After 3 hours i received the answer it is my offside rear window motor and now the bad news to fit a new one and all the time with labour i have just had the bill for £495.00 and am well and truly pi**ed off.
I went out and purchased a new one at a cost of £105 and everything as been all right until a few days ago, i noticed if i left the car parked up for 2 days the battery had become flat again, So i have done a few tests but after 2 days it is flat again.
This morning i decided to go to my local MB garage and said can you put yout star diagnostics on it and find the problem?
After 3 hours i received the answer it is my offside rear window motor and now the bad news to fit a new one and all the time with labour i have just had the bill for £495.00 and am well and truly pi**ed off.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 191
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
A rear window motor - that is extremely unusual. The window motors seldom give trouble. The only common problem on early cars was the plastic bush that goes through the side window glass!!!
