How do you jump start or use battery tender on the new GLS with 48V system?
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From: Central Coast, CA
2020 X7 xDrive40i, 2016 X3 sDrive28i
How do you jump start or use battery tender on the new GLS with 48V system?
I've got a GLS450 on order, During the excruciating wait, I was thinking about the 48V system in the car. I now work from home and drive less than 5k miles a year. Sometimes my car sits 5 or 6 weeks in the garage. Currently I use a battery tender on it to keep the battery topped up.
But the battery tenders on the market are all 12V.
WIth the 48V system, how do you keep the battery topped up? Or if the battery is dead, how do you jump start it from another car? (12v system).
Is there a 12VDC to 48VDC converter on board? That would have to be pretty beefy to be able to take the amps necessary from a 12V system to run the 48V ISG.
What does MB recommend to keep that 48V 0.9kwh lithium battery charged when vehicle is not going to be used for extended periods?
But the battery tenders on the market are all 12V.
WIth the 48V system, how do you keep the battery topped up? Or if the battery is dead, how do you jump start it from another car? (12v system).
Is there a 12VDC to 48VDC converter on board? That would have to be pretty beefy to be able to take the amps necessary from a 12V system to run the 48V ISG.
What does MB recommend to keep that 48V 0.9kwh lithium battery charged when vehicle is not going to be used for extended periods?
Thread Starter
MBWorld Fanatic!
Joined: Dec 2003
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From: Central Coast, CA
2020 X7 xDrive40i, 2016 X3 sDrive28i
Thread Starter
MBWorld Fanatic!
Joined: Dec 2003
Posts: 1,283
Likes: 126
From: Central Coast, CA
2020 X7 xDrive40i, 2016 X3 sDrive28i
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From: Michigan
Boxster
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From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
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From: Breckenridge, CO
Mercedes SLS & S Class
12v and/or 48v battery - GLS580
Page 613 of the Owners Manual indicates that there is both a 12 Volt and 48 Volt Battery in the Vehicle. The voltage at the jump-starting connection point is 12 volts. So you can jump start another vehicle with no issues.
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A gaggle of MB's
"Jump start another vehicle" - not me, let some one else call their own jump/tow service - those jump terminals are for Roadside or MB Tech's - they are not there to be a Good Samaritan
MBWorld Fanatic!
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From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
48V battery
it’s under the 2nd row seat, right side. However, I would not advise messing with it. The electronics in this vehicle could be sensitive to whatever you do. And, it doesn’t have a lot of capacity (0.9 Kw) unlike the batteries in a pure electric.
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From: McLean, VA
2011 Audi A4, 2014 E63S Wagon, 2020 GLS 580
If by right side you mean passenger side, I lifted my seat up and didn’t see it. Is it hidden under the floor? In any case, I agree. If the OP needs something to handle power outages, get a portable generator. Easier, safer, and more fuel efficient. The 48v Li/Ion battery doesn’t have much storage, so you’d have to keep the engine running to maintain recharge from the ISG.
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From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
48V LIon battery location
Last edited by GregW / Oregon; Feb 2, 2020 at 12:00 PM.
