SL/R230: Prevent battery from dying when leaving for three months
Thread Starter
Member
Joined: Sep 2008
Posts: 205
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From: Seattle, WA
2010 G55
Prevent battery from dying when leaving for three months
The title says it all. If I am not going to sell my car, I am going to leave it in my garage for three months. What are the options to keep my battery alive when I come?
I know I can buy the thing that will keep it charged, but I dont have electric outlet in the garage.
Is there a way to turn it off? and then turn it on? I did it on my BMW but asked the dealer to do it for me.
I know I can buy the thing that will keep it charged, but I dont have electric outlet in the garage.
Is there a way to turn it off? and then turn it on? I did it on my BMW but asked the dealer to do it for me.
Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
If I remember previous threads correctly, the starter battery disconnects from the system. The consumer battery in the trunk will be dead, so you'll need to open the car manually, the seats won't adjust, heater/stereo won't work at first, but the car should start. Within a half hour, the consumer battery should be back online. Drive around a couple of hours to make sure it's recharged.
Admittedly, three months is an awful long time. Anyone up north have a story on that after parking the car for the winter or something?
Admittedly, three months is an awful long time. Anyone up north have a story on that after parking the car for the winter or something?
Member
Joined: Jun 2005
Posts: 187
Likes: 3
From: Bay Area, CA
05 E55, 07 SL65, 06 S4
The title says it all. If I am not going to sell my car, I am going to leave it in my garage for three months. What are the options to keep my battery alive when I come?
I know I can buy the thing that will keep it charged, but I dont have electric outlet in the garage.
Is there a way to turn it off? and then turn it on? I did it on my BMW but asked the dealer to do it for me.
I know I can buy the thing that will keep it charged, but I dont have electric outlet in the garage.
Is there a way to turn it off? and then turn it on? I did it on my BMW but asked the dealer to do it for me.
Thread Starter
Member
Joined: Sep 2008
Posts: 205
Likes: 0
From: Seattle, WA
2010 G55
[QUOTE=mlandis;3522299]If I remember previous threads correctly, the starter battery disconnects from the system.
QUOTE]
Does that mean I dont need to disconnect it when I leave? It will do automatically when the car is not started.
Previously, I left my car for one month and the convienience options didnt work cause the rear battery was dead and yes it was recharged after I drove it for like 2 hours. Then It got dead again and got recharged after some driving as well. After that It was no problem.
QUOTE]
Does that mean I dont need to disconnect it when I leave? It will do automatically when the car is not started.
Previously, I left my car for one month and the convienience options didnt work cause the rear battery was dead and yes it was recharged after I drove it for like 2 hours. Then It got dead again and got recharged after some driving as well. After that It was no problem.
Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
Does that mean I dont need to disconnect it when I leave? It will do automatically when the car is not started.
Previously, I left my car for one month and the convienience options didnt work cause the rear battery was dead and yes it was recharged after I drove it for like 2 hours. Then It got dead again and got recharged after some driving as well. After that It was no problem.
Previously, I left my car for one month and the convienience options didnt work cause the rear battery was dead and yes it was recharged after I drove it for like 2 hours. Then It got dead again and got recharged after some driving as well. After that It was no problem.
Member
Joined: Jul 2006
Posts: 100
Likes: 1
From: East Coast (Up and Down)
13 S550, 10 S550, 08 GL550, 05 SL65, 97 SL600, 09 E63
OK. I have tons of experience with this one.. *lol* I'm always on the road and my cars in NY all seem to need a bit of help. Get a high quality battery trickle charger with a built in maintenance mode. (you can find them online for about $40-50). Hook up the battery and keep her plugged in. Problem solved.
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Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
OK. I have tons of experience with this one.. *lol* I'm always on the road and my cars in NY all seem to need a bit of help. Get a high quality battery trickle charger with a built in maintenance mode. (you can find them online for about $40-50). Hook up the battery and keep her plugged in. Problem solved.
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Member
Joined: Jul 2006
Posts: 100
Likes: 1
From: East Coast (Up and Down)
13 S550, 10 S550, 08 GL550, 05 SL65, 97 SL600, 09 E63
If you leave your car in the sun, there's a solar version that plugs into the cigarette lighter. That works well.
The link is:http://www.siliconsolar.com/automoti...-chargers.html
it's the battery maintainer. 5.5W
The link is:http://www.siliconsolar.com/automoti...-chargers.html
it's the battery maintainer. 5.5W
Member
Joined: Jul 2006
Posts: 100
Likes: 1
From: East Coast (Up and Down)
13 S550, 10 S550, 08 GL550, 05 SL65, 97 SL600, 09 E63
If you have an attached garage, running an AC power line into it is really a weekend job (about 3-4 hours), but if it's detached, just mount some solar panels somewhere and have it go to a 12V charging system (or a 12V battery, then to an inverter). Contact me if you need more details. (One of my businesses is a construction company) and I can draw up some simple instructions for you to follow if you decide to go down this road.
Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
I don't know why I'm up right now 
but while I am I remembered a pretty long thread all about this topic -- could be useful as well.
https://mbworld.org/forums/sl-class-...ry-tender.html
but while I am I remembered a pretty long thread all about this topic -- could be useful as well.https://mbworld.org/forums/sl-class-...ry-tender.html
