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2013 E-350 auxiliary battery location in engine compartment

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Old Aug 14, 2022 | 08:47 PM
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Question 2013 E-350 auxiliary battery location in engine compartment

Hello everyone, I’m trying to locate my auxiliary battery in the suggested places, I think it’s in the engine compartment but not positive if what I’m looking at is it. I took two pictures to post on here and if anyone can verify that it is the auxiliary battery I would appreciate it very much.

Please help identify this part and confirm if it’s the auxiliary battery.

Please identify this part and identify if it’s the auxiliary battery
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Old Aug 14, 2022 | 10:35 PM
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Originally Posted by skidaddyoo
Hello everyone, I’m trying to locate my auxiliary battery in the suggested places, I think it’s in the engine compartment but not positive if what I’m looking at is it. I took two pictures to post on here and if anyone can verify that it is the auxiliary battery I would appreciate it very much.

Please help identify this part and confirm if it’s the auxiliary battery.

Please identify this part and identify if it’s the auxiliary battery
this part is not a battery. It is a load center that dispatches power to other fuse distributions and heavy duty electric consumers.

Read the section about charging battery in the owners manual. It will help you understand the use of the RED PLASTIC protecting slider on top of what's called PreFuse box.

Beware that many exposed parts of the preFuse are always live from the battery (+).


Last edited by CaliBenzDriver; Aug 14, 2022 at 11:46 PM.
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Old Aug 15, 2022 | 08:40 AM
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Thank you very much for the quick reply! My auxiliary is not located in the wheel well area in the trunk either. I don’t trust myself taking apart the dash to find it there, so I guess it’s off to the repair shop I go and spend $$$ for the repair. I really enjoy my E class, it’s the best road trip car I have ever owned.
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Old Aug 15, 2022 | 08:54 AM
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It should be in the dash. There's a driver's side end panel (revealed by opening the door) that gets removed, then the battery is low in there.
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Old Aug 15, 2022 | 08:56 AM
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Originally Posted by skidaddyoo
Thank you very much for the quick reply! My auxiliary is not located in the wheel well area in the trunk either. I don’t trust myself taking apart the dash to find it there, so I guess it’s off to the repair shop I go and spend $$$ for the repair. I really enjoy my E class, it’s the best road trip car I have ever owned.
2013 E350 the auxiliary battery is in the drivers side dash, behind the triangular panel, it looks like a home security system battery.

Check videos for how-to's it's pretty easy once you see were the panel clips are.

Last edited by pierrejoliat; Aug 15, 2022 at 08:58 AM.
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Old Aug 15, 2022 | 09:24 AM
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Thank you! I will check out some you tube videos on it.
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Old Aug 15, 2022 | 09:34 AM
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