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2 batteries?

     
Old Dec 14, 2019 | 08:19 PM
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2017 E300
2 batteries?
Have my 17 E300. Leaving for the winter and want to buy a charging tender. Is there a rear battery or just the engine compartment battery that I would hook the tender to? Many thanks
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Old Dec 14, 2019 | 09:15 PM
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'19 E63S sedan
Originally Posted by spencer05
Have my 17 E300. Leaving for the winter and want to buy a charging tender. Is there a rear battery or just the engine compartment battery that I would hook the tender to? Many thanks
No rear battery. Just one starter battery with the connector for the tender and an auxiliary super-capacitor bank under the passenger footwell. Get a tender with a dedicated AGM mode. I have this one and it works great.
https://www.amazon.com/gp/product/B00CD44RQO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B00CD44RQO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
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Old Dec 15, 2019 | 02:15 AM
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https://www.ebay.com/itm/0009822921-...8AAOSwm79ciXc2

Check if you have a 12v connector in your trunk
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Old Dec 15, 2019 | 06:03 PM
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Originally Posted by wally AMG
https://www.ebay.com/itm/0009822921-...8AAOSwm79ciXc2

Check if you have a 12v connector in your trunk
1. That's an old version of the CTEK I posted. Not as many features (like phases in the charge) and a lot more money.
2. I think that 12V connectors are disabled when the car is off. The jumpstart connector under the hood is the best bet for a battery tender.
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