battery charger

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battery charger

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Mercedes Forum >> Mercedes Benz Models >> Mercedes SL Class >> battery charger

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battery charger - 1/26/2008 9:49:13 AM

ab4jy

Posts: 26
Joined: 12/27/2007
Status: offline

does anyone have recomendations for the use of a trickle
or float charger on SL..the owners manual discourages it.
i dont drive mine much in winter and the trunk battery
gets low enough for the battery off line alert to come on.

help..
glen

Post #: 1

RE: battery charger - 1/27/2008 1:19:41 AM

brookings

Posts: 152
Joined: 6/1/2007
Status: offline

I just pull the ground wire on the battery when I let her set for more than a few days. With those cars pulling power all the time the batteries today don't stand up to getting drained and charged all the time. So far I've had no problems at all by pulling the ground. The battery is always ready to go when I want to take her for a spin. I use a trickle charger, but I disconnect the cables.

< Message edited by brookings -- 1/29/2008 11:43:54 PM >

(in reply to ab4jy)

Post #: 2

RE: battery charger - 1/29/2008 11:43:12 AM

ab4jy

Posts: 26
Joined: 12/27/2007
Status: offline

thanks..
if you pull the ground, dont you loose some of the programming of the accesories?
im talking about the trunk battery...

tnx
glen

(in reply to brookings)

Post #: 3

RE: battery charger - 1/29/2008 12:54:23 PM

uberwgn

Posts: 140
Joined: 6/21/2005
From: New England
Status: offline

Glen, take a look at Yuasa's smart charger. It's either 1.25A or 1.5A. Maintenance float charge drops to 10mA :)

_____________________________

1999 E300D
2002 S210

(in reply to ab4jy)

Post #: 4

RE: battery charger - 1/29/2008 11:56:22 PM

brookings

Posts: 152
Joined: 6/1/2007
Status: offline

you have to reset your clock, push memory for your seats, mirrors and steering wheel, no biggie if they are still in the same position as before. reset your radio. Small sacrifice to save your battery. Is there a battery somewhere other than the trunk that I'm not aware of?

(in reply to ab4jy)

Post #: 5

RE: battery charger - 1/30/2008 6:09:21 AM

ab4jy

Posts: 26
Joined: 12/27/2007
Status: offline

thanks all...
im using a low current vector/black and decker charger that float charges at 12.7-3.2 volts..and when balanced it is only putting 10- to 50 ma to maintiain memory devices.
and so far ive only used it on the appliance battery in the trunk....and yes the 2003 sl 500 has a start batttery up front and a 70 ah unit in the trunk that runs only the ""appliances"
...interesting to note...the mercedes battery seems to be made by johnson controls.

tnx

glen

(in reply to brookings)

Post #: 6

RE: battery charger - 1/30/2008 11:54:54 PM

brookings

Posts: 152
Joined: 6/1/2007
Status: offline

well that's something I didn't know about the 230 having a second battery. seems like a good feature over my old 129 with the one battery for all functions. BTW those 230s are really gorgeous.

(in reply to ab4jy)

Post #: 7

RE: battery charger - 1/31/2008 7:35:02 AM

ab4jy

Posts: 26
Joined: 12/27/2007
Status: offline

sorry...i may have confused some....its a 2003 SL500.
that has the 2 batteries.
glen

(in reply to brookings)

Post #: 8