So my cars are 2022 GLA AMG 45. I kept getting the notice on my app that my battery is low. I checked it and it was at 60%. We load tested it and found the health was at 55% and it says replace battery. I'm under warranty I called the dealership they want me to wait two weeks and give me a loan a car they can't just put a battery in they have to do diagnostics and they want me to leave it overnight. ridiculous I have to wait 2 weeks to get a battery. I searched all the auto places in my area and nobody comes up with the battery for this car it's kind of rare in the United States. In my opinion anyway . results from AutoZone advance Auto Parts pep boys Napa nothing. I think I found one that'll work. But I'm not positive. Cuz I'm considering just buying a battery and doing it myself. You guys have any opinion on this matter I would appreciate the input. Below is a link of the battery I think it will work . But I'm not positive

https://www.autozone.com/batteries-starting-and-charging/battery/p/duralast-platinum-agm-battery-bci-group-size-94r-850-cca-h7-agm/319458_0_0

 

Are you shopping for a replacement battery by the battery specification, or relying on the auto stores' shop by car database? What does the spec label on the battery say?

 

it's a German battery 80 ah, cca 800

 

There should be some other markings -- can you post a photo?

 

I would have to remove the battery to get more information there are other things on top of that battery with connections so it's not that simple. Trying to send a screenshot says 90% complete won't finish to 100%, so I can't send the screenshot

 

Are you able to measure its dimensions with a tape or ruler?

 

Long story there's nothing wrong with the battery there's something wrong with the person who was testing it. Me and my friend who knows more than I do. We were testing the battery using the positive lead and then connecting the negative lead to the car engine. Testing that way the battery test it tells me battery health zero replace battery. I was doing it wrong and so was my mechanical friend. I have to remove the cover from the battery and connect it right to the positive and negative lead. Now the battery says Health 100% charge 97% because I had it on the charger. The problem with me is I work 4 miles from work I don't run the car enough. And the cars connected to the internet and other things is always drawing the battery. If I get the warning on the APP and the battery gets too low I'll just put it on the charger I do too many short trips I'm not giving the battery enough time to charge. So long story short lessons learned. I even went to Mercedes and because there were no error codes they wouldn't do anything for me. Then I went home and I figured all this out. So I was worried about nothing. So I am relieved no need to worry anymore
I appreciate you trying to help me.

 

Glad you figured it out. After I bought a battery tester (a Topdon BT300P), I discovered battery testing needs to be done with the tester's clamps connected directly to the battery posts. Charging can be done using the engine compartment terminals, but these terminals give inaccurate results for battery testing.

 

Yeah I'm glad I figured it out learn something new everyday