Starting Battery Replacement
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Newbie
Joined: May 2011
Posts: 12
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2002 E320 4Matic
Starting Battery Replacement
When i replace the starting battery on my 2011 E350, will the auxiliary battery keep the computer system supplied with power so I don't have to worry about losing codes, etc? Or should I put a back-up power supply onto the power leads while I swap out the battery?
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Joined: Jan 2009
Posts: 9,225
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From: V E G A S
1922 Ford Model T / no OBD
No. The aux battery is disconnected from the car when ignition is off.
But what you are worry about? I had my battery disconnected for storage on my 2014 model and don't recall need for any codes? I think only windows need resynchronization and clock might not reset from cellphone.
But what you are worry about? I had my battery disconnected for storage on my 2014 model and don't recall need for any codes? I think only windows need resynchronization and clock might not reset from cellphone.
Senior Member
Joined: Jul 2013
Posts: 308
Likes: 76
2024 E350
In 2016, Consumer Reports rated the Bosch batteries as one of the worst. Read this thread for more info on how to change your battery. I recently changed mine with a Duracell Platinum AGM from Sam's Club for $180.
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Joined: Mar 2014
Posts: 3,107
Likes: 394
From: West Central Florida
2011 E550 P2 4M Sedan
I would close all the glass so that you don't have to worry about retraining the auto open/close. After you reconnect power, only thing you should have to adjust is the time.
I would shop around for AGM batteries and look at coupons, rebates and discounted gift cards to auto parts store. Many folks have used store brand - just make sure it is the correct size and CCA and you should be fine.
I would shop around for AGM batteries and look at coupons, rebates and discounted gift cards to auto parts store. Many folks have used store brand - just make sure it is the correct size and CCA and you should be fine.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
In 2016, Consumer Reports rated the Bosch batteries as one of the worst. Read this thread for more info on how to change your battery. I recently changed mine with a Duracell Platinum AGM from Sam's Club for $180.
I bought the Bosch for W210 5 or 6 years ago. Had a coupon at the time, so it cost me about $90. The first battery start failing after couple of weeks and PepBoys gave me another one.
Eventually I sold W210, but kept the battery and presently it sits in our 320 Bluetec. We live in warm climate, so GP don't take lot of current, but presently I played with scanner for almost 1 hr, using battery power with engine off/ignition on and the car started just fine.
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MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
In 2016, Consumer Reports rated the Bosch batteries as one of the worst. Read this thread for more info on how to change your battery. I recently changed mine with a Duracell Platinum AGM from Sam's Club for $180.
I bought the Bosch for W210 5 or 6 years ago. Had a coupon at the time, so it cost me about $90. The first battery start failing after couple of weeks and PepBoys gave me another one.
Eventually I sold W210, but kept the battery and presently it sits in our 320 Bluetec. We live in warm climate, so GP don't take lot of current, but presently I played with scanner for almost 1 hr, using battery power with engine off/ignition on and the car started just fine.
Previously I bought Kirkland (COstco) battery with 100 months warranty and it gave ghost at 50th month.
Costco gave me 1/2 price back .
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