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Old May 11, 2021 | 10:41 PM
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2014 S550 AMG, 2017 XT5
Originally Posted by Jud Chapin
All due respect, but I'm not sure why you think I need to be more careful with my question. It's pretty explicit and has nothing to do with charging the starter battery, only testing it. FYI, I have 2 CTEK MXS 5.0's, 1 for each car.
Late night post and the other Poster mentioned $175- Battery... No MB battery is $175-, only possibly the AUX.
None of these work for the testing / monitoring as a solution....

Amazon Amazon
Amazon.com: CTEK (56-564) Comfort Indicator Pigtail: Automotive Amazon.com: CTEK (56-564) Comfort Indicator Pigtail: Automotive
Last edited by Nice Ride; May 11, 2021 at 10:45 PM.
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Old May 11, 2021 | 10:49 PM
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Originally Posted by Jud Chapin
Wow, great find! Just ordered one. Great Price also. I like that it has the rubber cap also.
Amazon.com: CTEK (56-380) Comfort Indicator Panel M8 for Top Post Batteries: Automotive Amazon.com: CTEK (56-380) Comfort Indicator Panel M8 for Top Post Batteries: Automotive
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Old May 11, 2021 | 11:01 PM
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Originally Posted by Nice Ride
Late night post and the other Poster mentioned $175- Battery... No MB battery is $175-, only possibly the AUX.
None of these work for the testing / monitoring as a solution....

https://www.amazon.com/CTEK-40-149-C...686113&sr=8-17
Amazon.com: CTEK (56-564) Comfort Indicator Pigtail: Automotive
The $175 was the charge for testing only. I recently bought an OEM aux bat for $125 otc out the door. This was about 25% off.
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Old May 12, 2021 | 12:03 AM
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'11 E350, '11 E550, '98 M3, '95 E320
Originally Posted by Jud Chapin
Yup

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Old May 12, 2021 | 12:04 AM
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'11 E350, '11 E550, '98 M3, '95 E320
No reason main battery needs to come from MB, besides aux... Champion, Deka, Interstate, etc...
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Old May 12, 2021 | 01:57 PM
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Originally Posted by Jud Chapin
The $175 was the charge for testing only. I recently bought an OEM aux bat for $125 otc out the door. This was about 25% off.
That's a good price for a OEM Battery. Easy to do if you have the time and don't mind DIY. My AUX lasted 5 years. On average, Battery lifespan is 3 to 5 years. Extreme Cold and Hot climates will effect lifespan as well as upkeep. As they say millage will vary...
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Old May 12, 2021 | 02:02 PM
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Originally Posted by bmwpowere36m3
No reason main battery needs to come from MB, besides aux... Champion, Deka, Interstate, etc...
You are correct, however many people feel better knowing its an original part. Even though its not Mercedes who manufactured the battery. My OCD wont let me live with a different sticker / markings on a battery, but that's another story... Getting essentially a same spec battery non branded by MB can save $$.
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Old May 12, 2021 | 02:05 PM
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Originally Posted by Jud Chapin
Thanks so very much for your time on this. It's really appreciated. The lithium jump sounds like the answer. Can you recommend one?
Remember to Check the Jump Pack annually to make sure its charged. Better to be over prepared sometimes than under...
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Old May 12, 2021 | 02:10 PM
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Originally Posted by Nice Ride
That's a good price for a OEM Battery. Easy to do if you have the time and don't mind DIY. My AUX lasted 5 years. On average, Battery lifespan is 3 to 5 years. Extreme Cold and Hot climates will effect lifespan as well as upkeep. As they say millage will vary...
MB dealers in S. Fl. are quick to discount parts as business is slow for them due to Covid. There are 6 MB dealers fairly near me and if you tell them the other guy is selling a part cheaper, they'll usually match or do better.
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Old May 12, 2021 | 02:11 PM
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2014 S550 AMG, 2017 XT5
Originally Posted by Jud Chapin
The $175 was the charge for testing only. I recently bought an OEM aux bat for $125 otc out the door. This was about 25% off.
When I went in for service for water in Headlights yet again, I asked them to test the battery since it was over 7 years old, they said the same thing $175- to test. I decided not to test, however, it was part of the Service anyway they should have mentioned that. Part of bringing in the car for any service, they will usually test and look at Tires/Bat/Wipers/Brakes to charge for more services if they are needed. Its a shame that they were willing to take money for something that was part of the standard service.
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Old Oct 2, 2021 | 08:10 AM
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Originally Posted by Nice Ride
I don't know of any reason why not. The cables run directly to the trunk battery. You can check Sitting Voltage and Running Voltage with a meter..
I checked my '16 S coupe's main battery at the charging posts with 2 different digital battery testers. Both showed bad battery. Rechecked with analog battery load tester and it showed good. Guess that's why MB gets $200 or so to do a battery test as the lining in the trunk has to be removed to get to the battery. You'd think MB could provide an easier way to test a battery.
Last edited by Jud Chapin; Oct 2, 2021 at 12:48 PM.
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