SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: SL550 2007 battery drain current fuse 71

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Old 07-17-2015, 05:20 PM
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SL550 2007
SL550 2007 battery drain current fuse 71

Hi, I have Mercedes SL550 2007 and I have a problem with the leaking rear battery., I change the battery but I have always 1.86 amp on my multimeter, if I remove the fuse 71, that's drop to .16amp. Do you have a idie what is wrong or if is it normal? The battery was low evrery day when I start the car, I have a trouble " confort convinience disable" for 5 minutes and after it was ok. Thank you and sorry for my english, I'm french people.
Old 07-17-2015, 08:37 PM
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Look at the front battery. The rear battery has a DC/DC converter to top up the front, so if the front battery is low it will drain the rear battery trying to keep it alive.
Old 07-18-2015, 10:06 AM
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The front battery was new one

Thanks for your answer, but the front battery was a new one too, and I'm trying to disconnect it, same problem.
Old 07-19-2015, 06:12 AM
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The fuse 71 (f71) is for the PSE (the central locking pump) in the boot (trunk).
Do you you have some other symptoms?
I see you have started another thread.
Old 07-19-2015, 10:01 AM
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No other symptoms, but I create another problem when I remove all fuse for determine the problem; after I reconnect the battery, I have a red message on dash "raise rool-over bar" I don't no why, I try to disconnect the battery for 30 minutes, but I have always this message (if the roll-over bar was down) , and the roll-over bar work good on manuel mode. but that's another problem and that's problem was not very important for me.
Old 07-23-2015, 06:27 AM
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I found my problem, I have water leak on the trunk and the centrale locking pump have a water in

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