SL55/63/65/R230 AMG: 2004 SL55 AMG "Electric Consumers Offline"
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Super Member
Joined: May 2010
Posts: 816
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2008 W204
2004 SL55 AMG "Electric Consumers Offline"
Is there a common consensus on what can cause this message/error? The car does this whenever I start it, then after driving/idling for about 20 minutes I get the "Electric Consumers Back Online" message and the top can finally go down, heated seats finally work etc.
I have replaced the battery and keep the car on a maintainer....yet even doing this the car has to run for a while before it allows all electric consumers to operate.
I have replaced the battery and keep the car on a maintainer....yet even doing this the car has to run for a while before it allows all electric consumers to operate.
MBWorld Fanatic!
Joined: Apr 2009
Posts: 1,038
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From: Saint Johns FL. USA
05 SL55, 10 C63, 12 SLK3, 20 S560, 08Bentley GT Speed, 16 Aston Martin Vanquish
You need to replace the rear battery. Your dealer parts department probably has one in stock. It is an easy swap.
Newbie
Joined: Nov 2019
Posts: 11
Likes: 0
2004 AMG SL55
Two new batteries
I just purchased car three weeks ago. I put two brand new batteries in. The consumer battery (trunk) is an AGM type which in my opinion are superior
I get consumers off line for about two minutes first start every day. I always plug tender in overnight.
I don’t know if this is normal.
I get consumers off line for about two minutes first start every day. I always plug tender in overnight.
I don’t know if this is normal.
Newbie
Joined: Jul 2017
Posts: 5
Likes: 0
2006 SL55
I had this issue earlier this year, same symptoms.
Turns out I needed to replace my alternator. Smelt like burnt plastic under the hood.
I was driving and I lost power to the SBC.. very scary! Lucky I was in traffic and exited quick!
You might be lucky and just replace the voltage piece.
Turns out I needed to replace my alternator. Smelt like burnt plastic under the hood.
I was driving and I lost power to the SBC.. very scary! Lucky I was in traffic and exited quick!
You might be lucky and just replace the voltage piece.
Banned
Joined: Jan 2006
Posts: 1,982
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From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
Measure the voltage on the rear battery cables just before you start the engine. If it is above twelve volts, then the vehicle power supply module is suspect. If it is below, then the voltage regulator on the alternator is suspect.
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Newbie
Joined: Oct 2019
Posts: 5
Likes: 1
From: Gilbert Arizona
2003 SL55 AMG
Where is the power supply module, i have the same issue and measured 12.45 V at the battery in the trunk, I took also measured the voltage while it was running at 14.3 V. seems like good voltage but i didnt know about the Power Supply Module.
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Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
The power supply module is located in the left side of the trunk. It is mounted on the inside of the wheel well in front of the battery. You can not access the module without removing part of the trunk lining.
I would use Star Diagnosis or other diagnostic device to see what voltage the module is reading on "circuit 30".
I would use Star Diagnosis or other diagnostic device to see what voltage the module is reading on "circuit 30".
