BMW Battery Tender, Will It Work in My BS?
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Super Member
Joined: Oct 2007
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From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
BMW Battery Tender, Will It Work in My BS?
My BS spends a lot of time in my garage. With the upcoming change in seasons it will spend a lot more. I searched the archives to determine if my BMW battery tender will work in my car. I know it won't work in my SL but thought it might in my BS. Does it also have dual batteries (start-up and electronics)? It's the cigarette lighter plug-in type. Anybody know? Thanks
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From: Cave Creek, AZ and Newport Beach
'22 G 63 AMG, '21 GLE 53 AMG, '20 NSX
My BS spends a lot of time in my garage. With the upcoming change in seasons it will spend a lot more. I searched the archives to determine if my BMW battery tender will work in my car. I know it won't work in my SL but thought it might in my BS. Does it also have dual batteries (start-up and electronics)? It's the cigarette lighter plug-in type. Anybody know? Thanks
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CLK 63 AMG Black
Mine did not. I wound up with a dead battery, so I bought the Benz charger. You do need to be careful, as it once seemed to drain the battery, which I thought might be due to not fully pressing the charger into the receptacle.
Thread Starter
Super Member
Joined: Oct 2007
Posts: 917
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From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
Thread Starter
Super Member
Joined: Oct 2007
Posts: 917
Likes: 1
From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
Ordered my Battery Tender
I just ordered my battery tender from MB. It's $142.00 in their accessory book. It charges the battery through the cigarette lighter. Strange that my OEM BMW charger won't work. Oh well, it will work on my wife's X3 so not all is lost! Thanks to all who responded to my question for the feedback and info. This board is GREAT!
MBWorld Fanatic!
Joined: Aug 2002
Posts: 1,309
Likes: 86
From: Cave Creek, AZ and Newport Beach
'22 G 63 AMG, '21 GLE 53 AMG, '20 NSX
I just ordered my battery tender from MB. It's $142.00 in their accessory book. It charges the battery through the cigarette lighter. Strange that my OEM BMW charger won't work. Oh well, it will work on my wife's X3 so not all is lost! Thanks to all who responded to my question for the feedback and info. This board is GREAT!
Thread Starter
Super Member
Joined: Oct 2007
Posts: 917
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From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
I don't know, I haven't seen it yet. I called the MB "parts guy" I've gotten to know and he said it would work in my BS. According to him it plugs into the cigarette lighter. He's shipping it to me. I'll answer your question when I receive it in a couple of days.
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Thread Starter
Super Member
Joined: Oct 2007
Posts: 917
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From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
MB Battery Trickle Charger Works GREAT!
It doesn't plug into the cigarette lighter but, it does connect to the separate connector in the left tail light area (see page 324 of your owners manual). The only thing I had to do was unsnap the female connector plug and then connect my charger to it. It works fine and I'm happy knowing I'll keep my battery charged for extended periods. The MB part number is B 6 7 54 2029. It costs $142.00 and I had it dropped shipped to my home.
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Senior Member
Joined: Sep 2007
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CLK 63 AMG Black
It's odd that my MB charger came with a cigarette lighter plug in, but today it totally discharged my battery. I'm wondering if you push it in all the way, could it partially activate the lighter component? I've never had a tender kill the battery, on any other car, but this one has done it twice. The first time it happened to me, I attributed it to the BMW charger. But, this was with the Benz charger supplied by my dealer. Riddle me that. AS
Thread Starter
Super Member
Joined: Oct 2007
Posts: 917
Likes: 1
From: Manassas, VA
10 Cayenne GTS, 07 Porsche 911 Turbo
It's odd that my MB charger came with a cigarette lighter plug in, but today it totally discharged my battery. I'm wondering if you push it in all the way, could it partially activate the lighter component? I've never had a tender kill the battery, on any other car, but this one has done it twice. The first time it happened to me, I attributed it to the BMW charger. But, this was with the Benz charger supplied by my dealer. Riddle me that. AS
