SL55/63/65/R230 AMG: Consumer Battery Drain Overnight
Thread Starter
Junior Member
Joined: Jan 2021
Posts: 17
Likes: 1
SL 500 Kleemann S/C
Consumer Battery Drain Overnight
Hello , I have constant drain of the consumer battery overnight, we tried to diagnose it but when the car is turned off it shows no drain. We assume something is turning on and off at random times and draining it. We started disconnecting different modules ( first on the list was PSE pump) but it didn't help.
Can anyone with some experience with this problem point me in some direction at what else to look at?
P.S : I had this car for 5 years now and and this problem is recent ( maybe 1-2 months old)
Can anyone with some experience with this problem point me in some direction at what else to look at?
P.S : I had this car for 5 years now and and this problem is recent ( maybe 1-2 months old)
Senior Member
Joined: May 2019
Posts: 280
Likes: 37
From: Lincolnshire, IL
2005 SL55 AMG
Hello , I have constant drain of the consumer battery overnight, we tried to diagnose it but when the car is turned off it shows no drain. We assume something is turning on and off at random times and draining it. We started disconnecting different modules ( first on the list was PSE pump) but it didn't help.
Can anyone with some experience with this problem point me in some direction at what else to look at?
P.S : I had this car for 5 years now and and this problem is recent ( maybe 1-2 months old)
Can anyone with some experience with this problem point me in some direction at what else to look at?
P.S : I had this car for 5 years now and and this problem is recent ( maybe 1-2 months old)
Member
Joined: Aug 2015
Posts: 76
Likes: 18
From: Central Florida
06' SL65, 96' S500 & 09' S550
I agree with @Poppyboy. The R230 is not the car you take to the airport to leave in the upper deck for a few weeks. I keep a battery maintainer on the consumer (trunk) battery full time. Sometimes there are two maintainers on my SL65 when I'm also plugged in to the starter (under hood) battery. Normally these two battery circuits degrade in isolation. The consumer battery is the one to keep in good health as it runs most everything except the starter motor itself. This SL likes to taste electricity, that's just the way it is and you can see that when the Comand screen fires up with the logo when you do just about anything with the door or boot.
Thread Starter
Junior Member
Joined: Jan 2021
Posts: 17
Likes: 1
SL 500 Kleemann S/C
Battery is brand new I charged it to full again after it drained and overnight it was empty again, before this problem occurred I never had any battery problems maybe it would be drained if i didn't drive it more than 2 weeks.
Senior Member
Joined: May 2019
Posts: 280
Likes: 37
From: Lincolnshire, IL
2005 SL55 AMG
Last edited by poppyboy; Feb 9, 2021 at 08:12 AM.
Thread Starter
Junior Member
Joined: Jan 2021
Posts: 17
Likes: 1
SL 500 Kleemann S/C
Yes, I did few more test when I unplugged the PSE pump it drained again but just to 70% so there is some sort of leak in the PSE pump for sure, but there is a leak somewhere else too.
