battery draining slowly - Mercedes-Benz Forum

Go Back   Mercedes-Benz Forum > Mercedes-Benz Coupe/Convertible Forums > W215 CL Class
New User? Register - Forgot Password is the premier Mercedes-Benz Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 03-17-2010, 12:05 AM   #1 (permalink)
BenzWorld Junior Member
Date registered: May 2007
Posts: 19
Question battery draining slowly

I have a 2002 CL 500 that has a parasitic load someplace in the system. With everything off the amp meter reads 0.5 amp. I've removed most fuses one by one and the current does not change.When some fuses are removed the current shoots way up to 3 to4 amps and settles own after 15 to 20 minutes back to 0.5 amp. What to do ? Help. I am not a very good mechanic but willing to listen. Thank you. Ray
raycoo is offline   Reply With Quote
Sponsored Links
Old 03-17-2010, 12:10 PM   #2 (permalink)
BenzWorld Member
mcfischer's Avatar
Date registered: Aug 2009
Vehicle: 2004 CL500
Location: WNY, USA
Posts: 351
I've read the battery can be drained by leaving the navigation DVD in while not using the car for extended periods. I've never had a problem, this is just what I heard. U mite wanna ck it.
2004 CL500
mcfischer is offline   Reply With Quote
Old 03-18-2010, 05:09 AM   #3 (permalink)
BenzWorld Member
manymercsmike's Avatar
Date registered: Aug 2006
Vehicle: CL500, CL500, 190E 2.6, 420 SEC, 350 SL
Location: Glasgow, Scotland, UK
Posts: 176
I wonder if that's whats happened to my '02 CL500.
We've had a hard winter in Scotland and it didn't get driven too much, at one stage it was left for nearly two weeks as a result of too much snow. I had to jump start it using my wife's car, as the battery barely had enough to turn the starter.

Since then, it's been fine, but now it seems it's totally dead. I drove it less than 3 days ago, then when going out to it yesterday, I can't even operate the central locking. The turn signals flashed once, faintly, then quit. I used the mechanical key to get in, put the fob in the ignition to cancel the alarm, and tried to start it. Nothing.

Do you think my battery's just decided to fail, or is there something more sinister going on e.g. something left on completely draining it? I always check it and the lights weren't on, nor the COMAND.

I'm going to get a new battery and start from there, although I'm concerned that the same thing may happen. What do you think?
2002 (C215) CL500 (Batmobile), Obsidian Black, 60k miles
2000 (S210) E320 Wagon, Alexandrite Green, 140k miles
1990 (C126) 420 SEC (Bruce), Astral Silver, 112k miles
1978 (R107) 350 SL (Boabby), Signal Red w/ silver hardtop, 115k miles

2004 (W209) CLK270 CDI, 32k miles
2000 (W210) E240, 70k miles
1997 (C140) CL500, 134k miles
1991 (W201) 190E 2.6 Sportline, 133k miles
manymercsmike is offline   Reply With Quote
Old 03-19-2010, 07:03 AM   #4 (permalink)
BenzWorld Junior Member
Date registered: Feb 2009
Vehicle: 2000 Mercedes-Benz CL 500
Location: Norway
Posts: 46
The problems you are experiencing seems familiar. I'm guessing your battery is fubar!

I had the same problems on my '00 CL500 not so long ago. Battery started to get worse and worse. It led up the the point where it completely drained itself over night.

I got a new battery and haven't had a problem so far.. (knock on wood).

Oh btw.. I'm in Norway and the winters here aren't very forgiving either
2000 Mercedes-Benz CL500
1986 Mercedes-Benz 190E 2.3-16 - Sold

Last edited by W215; 03-19-2010 at 09:50 AM.
W215 is offline   Reply With Quote
Old 03-19-2010, 10:23 AM   #5 (permalink)
BenzWorld Senior Member
bltserv's Avatar
Date registered: Feb 2004
Vehicle: Sold my 2005 SL55, 2000 CL500
Location: Irvine, CA.
Posts: 575
I have had my 2000 CL500 for 6 years now. It seems to use a battery every 2 years.
There is some kind of drain that occurs only on occassion. And when the Battery is newer.
It doesnt seem to be an issue. When I leave it for more than a weekend I put it on a trickle charger. Just seems to be the nature of the beast. But there is some phantom power drain in one of the control modules that happens once in awhile and does not help the Battery Life.
bltserv is offline   Reply With Quote
Old 03-22-2010, 04:45 PM   #6 (permalink)
BenzWorld Junior Member
Date registered: May 2007
Posts: 19
Question battery draining slowly

I've tried the fuse business with no results. What is an SDS?
raycoo is offline   Reply With Quote
Old 03-23-2010, 04:19 PM   #7 (permalink)
BenzWorld Junior Member
topofminehill's Avatar
Date registered: Jan 2010
Vehicle: 2006 CL-55 AMG (1 of 182 made for USA) and 2010 GLk350 AWD Barolo Red
Location: Northern New Jersey
Posts: 43
Has anyone had their cars plugged into a reader?
06 cl55 AMG
topofminehill is offline   Reply With Quote

  Mercedes-Benz Forum > Mercedes-Benz Coupe/Convertible Forums > W215 CL Class


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Topic Author Forum Replies Last Post
Battery keep draining! help! max_speed97 W220 S-Class 21 07-30-2014 08:44 AM
Battery Draining cal45fan W163 M-Class 6 10-08-2008 10:51 PM
Need help with a draining battery hookedup4door W123 E,CE,D,CD,TD,TE Class 5 04-20-2007 01:36 PM
Battery draining itself white500se W116 S, SE, SEL, SD Class 10 09-04-2006 09:44 PM
Something Draining the Battery? JonnyML500 W163 M-Class 11 11-13-2002 06:33 PM

All times are GMT -7. The time now is 06:42 AM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.1

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.