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There's an 800 CCA battery that fits and is widely available. It matches closer to the OEM battery. I went with NAPA Premium Legend #9A94R. 3 yr warranty. $205 on sale. The cheapest I found was thru Walmart.
To anybody else shopping for a OBD-II scanner, the Autel MX900 will easy reset the battery registration. This is a mid grade scanner that can be more useful later than an entry level Foxwell mentioned that works for only one vehicle. I caught the MX900 on a black Friday deal at $450 and it will scan multiple makes and models which I need along with a lot more capability. If you intend to keep cars more than 5 years, I see this scanner as a big help for DIY'ers.
You're right, that is a better match with the OEM. Indeed the Interstate one has slightly less capacity than the OEM which is 800A, 80Ah, RC: 140 min. Interesting that both the online battery matcher and the one @ Costco came up with this battery. Good to know for next time.
Originally Posted by mikapen
Are the OE batteries AGM or VRLA (Valve Regulated Lead Acid)?
I thought they were VRLA.
If so, wouldn't the OE charging rates have insufficient for an AGM battery?
Or, shouldn't the CTEK be set for LA, not AGM?
EXCELLENT Posting and videos!! THANK YOU! I did the same thing that you did....bought my replacement at battery at Costco. BTW - I tried an online search at Costco.com, but ultimately had to have the local service advisor at Costco look it up in their book and confirm fitment options, which included both the H6 and H7. I see you opted for the H6 at 760 Amps, but I went with the H7 at 850 Amps, as they only had this one in stock. Same price at $169.99 + tax. The battery installation was not bad at all as the dimensions of the battery were the same. 3-year warranty as well. The dealer wanted $300 for only a 2-year warranty! Saved almost 50%! I love Costco!
I then called around to see if any of the parts stores (AA, AZ, OR) would lend me scanner tool to reset the battery. After trying their units, I went on Amazon and bought the
Thanks for your report! After realizing the H6 was not the exact same size/capacity as the OEM, I was slightly miffed. But we don't have real issues with sub-zero cold AM starts in this region of the country so I am not so concerned. Next time, in 5 years I'll do it "perfect."
One limitation of the Foxwell I've learned is that other pro scanners have the ability to enter more data if the battery is not exactly the same. I think most 3rd party battery replacements are pretty close, so probably not a major issue here.
EXCELLENT Posting and videos!! THANK YOU! I did the same thing that you did....bought my replacement at battery at Costco. BTW - I tried an online search at Costco.com, but ultimately had to have the local service advisor at Costco look it up in their book and confirm fitment options, which included both the H6 and H7. I see you opted for the H6 at 760 Amps, but I went with the H7 at 850 Amps, as they only had this one in stock. Same price at $169.99 + tax. The battery installation was not bad at all as the dimensions of the battery were the same. 3-year warranty as well. The dealer wanted $300 for only a 2-year warranty! Saved almost 50%! I love Costco!
I then called around to see if any of the parts stores (AA, AZ, OR) would lend me scanner tool to reset the battery. After trying their units, I went on Amazon and bought the
on Amazon. I am waiting for it to arrive (with Prime it comes in two days). Cant wait to use it!
Thanks again for your EXCELLENT and HELPFUL post!
Maybe Im wrong but why pay that much money for scanner?
If you can get an ild laptop from enay for 50$ and open port cable from ali express for 10$ install Xentry (download for free) and use real system the same as dealers are using to code and scan MB.
Xentry images usually comes with WIS and Parts catalogs.
I just wanted to change a battery and save a little money doing it. Becoming a home mechanic is not my goal (yet).
After 2 days of the warning message, my battery completely died. Luckily I heeded the warning and got all my replacement parts/equipment that day. The time and energy it would have taken to assemble and learn everything you mentioned would not have been timely.
But it's nice those low cost options are available in the future should we want. Now I know that Xentry is a thing, and it's free???
Maybe Im wrong but why pay that much money for scanner?
If you can get an ild laptop from enay for 50$ and open port cable from ali express for 10$ install Xentry (download for free) and use real system the same as dealers are using to code and scan MB.
Xentry images usually comes with WIS and Parts catalogs.
Please tell us where.
The last time I tried an ebay version I was ripped off. I didn't get the "secret code," even though they provided a (different) non-working "code" several times.
When it comes to software, I do look gift horse in the mouth.
Maybe Im wrong but why pay that much money for scanner?
If you can get an ild laptop from enay for 50$ and open port cable from ali express for 10$ install Xentry (download for free) and use real system the same as dealers are using to code and scan MB.
Xentry images usually comes with WIS and Parts catalogs.
Outside of my main profession, I enjoy going into shadetree mechanic mode. It's relaxing and rewarding. Saving money is not my main motive. I have performed work that would have been cheaper at the dealer but I'm money ahead the majority of the time including tool cost. I upgraded my basic scanner to an Autel MX900 in the process of this battery replacement. It will serve me for many other uses with my multiple vehicles including TWO GLC300. Since they are almost identical, anything I learn to service pays me back twice. I also have a reference point 20' away. The Foxwell scanner mentioned may serve the purpose of this thread but I encourage those contemplating a purchase to consider all of the choices including yours.
The last time I tried an ebay version I was ripped off. I didn't get the "secret code," even though they provided a (different) non-working "code" several times.
When it comes to software, I do look gift horse in the mouth.
this is the cable I bought, reads all blocks with drivers included (if you get this one, DO NOT install any other drivers but included, I would not recommend this cable for coding (like permanently disabling Stop/Start ) for coding better to use original cable which is about $160
if you have more questions or need some help, PM me.
Originally Posted by no_mulligan
Outside of my main profession, I enjoy going into shadetree mechanic mode. It's relaxing and rewarding. Saving money is not my main motive. I have performed work that would have been cheaper at the dealer but I'm money ahead the majority of the time including tool cost. I upgraded my basic scanner to an Autel MX900 in the process of this battery replacement. It will serve me for many other uses with my multiple vehicles including TWO GLC300. Since they are almost identical, anything I learn to service pays me back twice. I also have a reference point 20' away. The Foxwell scanner mentioned may serve the purpose of this thread but I encourage those contemplating a purchase to consider all of the choices including yours.
This is not about saving money, this is about proper diagnostics, Xentry software what dealers are using to diagnose, all other scanners are good (some are very good) and most likely easier to use. Personally I've used a few:
THINKCAR Thinkdiag Mini Full System
LAUNCH Creader Elite Benz All System Diagnostic Code Reader for Mercedes Benz OBD2 Scanner,Bi-Directional Scan Tool,ECU Coding,All Reset Function,ABS
iCarsoft MBII for Mercedes Benz/Sprinter/Smart Professional Diagnostic Tool Scanner, New Version
but after I found the way to install Xentry, I would not go back, and if you do work yourself Work Instructions (WIS) and Parts catalog (EPC)
100% agreed with you, it's personal chose.
P.S. I'm not a mechanic, I just like to work on my cars.
Check your local battery plus store or advance auto parts - they might be able to register new battery when you buy it from them. Just call them. 2 Advance auto parts stores I called had no idea what this is, but battery plus store guy told me - you know what, we just got a tool from our head office that supports Mercedes.
Also there are cheaper alternatives in 2024 now like 2024 LAUNCH X431 Elite for Mercedes-Benz ($120 after coupon) that do a better job than Foxwell allowing you not only register a battery but also change parameters.
I spent 2 days reading and learning about Xentry but it all seemed like a rabbit hole of other people getting paid for hacks - not going to do that. They all provide you with "free" downloads and images but they all want you to sell actual keys for activation. So in the end of the day I figured my time was not worth it and I would rather get Launch x431 or similar (look up mercedes battery registation on Amazon, quite a few choices these days around $120-150) if you cannot find a local store that does this for you.
Follow up: Battery replaced with an Optima yellow top. No issues. No programing needed. I didn't even use an alternative power supply to make sure I don't lose any memory settings. I just pulled and replaced the battery. Everything works fine and the memory settings all retained....
Thanks for letting us know the results. I assume your wife didn't get the "Stop Car and let engine run" error massage again! That happened to my wife today So I'm just going to replace the battery. Thanks
Check your local battery plus store or advance auto parts - they might be able to register new battery when you buy it from them. Just call them. 2 Advance auto parts stores I called had no idea what this is, but battery plus store guy told me - you know what, we just got a tool from our head office that supports Mercedes.
Also there are cheaper alternatives in 2024 now like 2024 LAUNCH X431 Elite for Mercedes-Benz ($120 after coupon) that do a better job than Foxwell allowing you not only register a battery but also change parameters.
I spent 2 days reading and learning about Xentry but it all seemed like a rabbit hole of other people getting paid for hacks - not going to do that. They all provide you with "free" downloads and images but they all want you to sell actual keys for activation. So in the end of the day I figured my time was not worth it and I would rather get Launch x431 or similar (look up mercedes battery registation on Amazon, quite a few choices these days around $120-150) if you cannot find a local store that does this for you.
Yes I also heard Launch can reset the values in the SAM like Xentry. It also allows certain variant coding, it is a nice little powerhouse that fits in the glovebox unlike Xentry.
I have a 2018 Mercedes GLC 302. And I just have my starter replaced. Are we placed my battery with autozon 2nd best battery all good no codeing call dealer ship not this make need no codeing just replace battery you all good
About to replace an OEM battery on my 2018 GLC. I'm getting the "park vehicle, leave engine running" notification. Starter battery lasted almost 8 years, although start/stop has never really worked during this time. I may replace with an 850CCA battery, instead of the OEM Mercedes 800CCA. All other specs are identical to OEM. I understand it's easy to reset with a Foxwell device, but because the cold cranking amps have changed, would I not have to change/code the parameters as well during the reset, which a Foxwell NT530 cannot do? If this is true, I assume I will leave it up to my independent mechanic, since I'm not paying dealer prices for a battery install. Or are there other scanners that can code parameters sub $200?
Also, does anyone recommend through experience, replacing the auxiliary battery/control module at the same time?
About to replace an OEM battery on my 2018 GLC. I'm getting the "park vehicle, leave engine running" notification. Starter battery lasted almost 8 years, although start/stop has never really worked during this time. I may replace with an 850CCA battery, instead of the OEM Mercedes 800CCA. All other specs are identical to OEM. I understand it's easy to reset with a Foxwell device, but because the cold cranking amps have changed, would I not have to change/code the parameters as well during the reset, which a Foxwell NT530 cannot do? If this is true, I assume I will leave it up to my independent mechanic, since I'm not paying dealer prices for a battery install. Or are there other scanners that can code parameters sub $200?
Also, does anyone recommend through experience, replacing the auxiliary battery/control module at the same time?
As I recall, the Foxwell was the only relatively affordable OBD device I knew about back then. But then soon afterwards, someone described a newer device that was ~the same price and was able to modify the amp data. Let me see if I can find that.
EDIT: In this thread someone talked about the Autel MX900, which is spendier at ~$400, but includes all makes instead of just one. Maybe there's another OBD device I was thinking of.
EDIT2: It could be the launch cReader
Thanks. Yes, I meant modifying the amp data (if needed). Or is maybe sticking to the exact specs of OEM (800 amps) and doing a simple reset a better strategy? As the dealer or independent may not bother or think of editing the data..
Someone on this thread mentioned the 2024 LAUNCH X431 being $120, but it shows that it's around $450-$500
Last edited by engineering; Feb 4, 2025 at 05:47 PM.
This Launch product was mentioned earlier, is $129 after coupon, and on the page it states it can change battery type/amp, etc. It uses the same x431 chip, purportedly.
If I go from an 800CCA OEM battery to an 850CCA, can I do a simple reset of the charge throughput at the front SAM or do I also need to modify the amp data as well? The Mercedes literature I've read only says "confirm battery change in front SAM"
As I recall, the Foxwell was the only relatively affordable OBD device I knew about back then. But then soon afterwards, someone described a newer device that was ~the same price and was able to modify the amp data. Let me see if I can find that.
EDIT: In this thread someone talked about the Autel MX900, which is spendier at ~$400, but includes all makes instead of just one. Maybe there's another OBD device I was thinking of.
EDIT2: It could be the launch cReader https://www.amazon.com/LAUNCH-Merced...WVNBB6?ie=UTF8
I also bought the Foxwell device but one thing that annoys me is that each time I want to export a report I have to enter the same wifi ssid and password and my email address again. It seems not to remember these settings. Would the 2025 Launch Creader have the ability to remember these settings you reckon?
I also bought the Foxwell device but one thing that annoys me is that each time I want to export a report I have to enter the same wifi ssid and password and my email address again. It seems not to remember these settings. Would the 2025 Launch Creader have the ability to remember these settings you reckon?
the front SAM (signal acquisition module) has a counter that changes the charging scheme over time. You reset it to 0 when replacing the battery , and it should make the battery last longer.
the replacement is easy - unbolt just like a normal battery from any other car and place the new one in. Plug the foxwell in and the reset option for a new battery is under the body control modules section.
literally just did it on my wife’s 2019 glc last week with an H7 interstate battery from Costco.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
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