SL/R232: Ongoing Battery Issues
#101
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2022 SL55 AMG Roadster; 2024 Land Rover P400 Defender 110; 2020 Porsche Macan S; 2023 Audi Q5
#102
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The first day I got my SL55 I hooked a CTEK trickle charger to the terminals under the hood as described in the Owners’ Manual. An hour or so later I got the critical warning from the app. As the battery in my 992 (lithium ion) had gone completely dead hooking it up to a trickle charger (again, exactly as described in the manual) I went out and disconnected the SL from the charger. I brought it to the dealer and had them put terminals on the battery directly to charge with the MB branded charger. Not a single problem since then.
#103
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2023 Taycan GTS, 2022 AMG SL63 and 2024 Cayenne S
Yes, directly to the battery in the trunk. When I had my initial battery issues, the dealer agreed to give me the MB trickle charger for free and included the install to the battery; you can hook it up and the trunk will close just fine. I rarely use it now and havent had any more messages; remember, double click the lock button on remote and keep key away from car; dont use the Mercedes Me app to keep checking the battery; hopefully that will help. If not, they need to see if you car has a power draw from somewhere even after its locked.
#104
Junior Member
Yes, directly to the battery in the trunk. When I had my initial battery issues, the dealer agreed to give me the MB trickle charger for free and included the install to the battery; you can hook it up and the trunk will close just fine. I rarely use it now and havent had any more messages; remember, double click the lock button on remote and keep key away from car; dont use the Mercedes Me app to keep checking the battery; hopefully that will help. If not, they need to see if you car has a power draw from somewhere even after its locked.
#105
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2022 SL55 AMG Roadster; 2024 Land Rover P400 Defender 110; 2020 Porsche Macan S; 2023 Audi Q5
Directly to the battery. It will charge completely over a day or so. It is just the standard one. My dealer wasn’t so kind; I had to buy the charger and they charged me to attach the charging cable to the battery terminals.
#106
Junior Member
Got it, thanks. Not sure if our dealer will be as kind as other dealers in or charge me too ?!?!? The last time our SL63 was at the dealer, they had it seven weeks! Had an EQS loaner which I found to be an interesting vehicle, but it was not the SL63!
#108
Junior Member
Well Bummer. I came to see if anyone else ever had a battery critical issue, relating to my 22 SL 63 I purchased used with 450 miles on it. Guess I’m late to the party and didn’t’ due my DD 😜 I’ll start double locking but if I can’t get resolved I’ll end up getting rid of it quickly if I lose confidence in it. Before I got on this Forum I was investigating and noticed that the interior multi color led’s stay on unless I lock it. I couldn’t find any special delay timer for them in settings. I waited for 15 minutes, twice, with the fob 40 feet away or so, and led’s never went off (not referring to the map lights) if not locked, is that a thing? Part of the prob? Also notice my cooling fans stay on for 3 or 4 minutes after car turned off, even after a brief NON spirited drive. Otherwise enjoying the car. Just don’t want an “otherwise” in my car story ya know.
Thanks
Thanks
#109
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W463 G550 / C190 GTC //prev: W204 C63 507 / R170
You should always lock a modern car. Various systems will stay on unless locked. Any particular reason why you prefer to leave it unlocked? It should also automatically lock after a while, but that may need to be enabled in settings. I know my 2019 G Wagon (current gen) locks automatically, and I believe my 2019 AMG GTC also does.
Cooling fans running after you shut down is normal.
Cooling fans running after you shut down is normal.
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Sungkyo (06-26-2023)
#110
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'22 AMG SL55;'23 Porsche Cayenne S Coupe;'13 Porsche Boxster S
Most modern cars will automatically relock when you have a locked car that you unlock with the fob and don't physically open the door within about 45 seconds. None of my cars including the SL will automatically lock a car after I walk away from the car. I know that Teslas will automatically lock when you walk away from the car.
I do NOT lock any of my cars when they are in the garage in my home. There are many times that I need to retrieve or put something in the car when I don't have the key with me and I need the car to be unlocked. So far no battery issues with my SL. I do use battery tenders on some of my other cars (my Porsche which is on a trickle charger still has the original battery after 11 years).
I do NOT lock any of my cars when they are in the garage in my home. There are many times that I need to retrieve or put something in the car when I don't have the key with me and I need the car to be unlocked. So far no battery issues with my SL. I do use battery tenders on some of my other cars (my Porsche which is on a trickle charger still has the original battery after 11 years).
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Sungkyo (06-26-2023)
#111
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2022 AMG SL63
Well Bummer. I came to see if anyone else ever had a battery critical issue, relating to my 22 SL 63 I purchased used with 450 miles on it. Guess I’m late to the party and didn’t’ due my DD 😜 I’ll start double locking but if I can’t get resolved I’ll end up getting rid of it quickly if I lose confidence in it. Before I got on this Forum I was investigating and noticed that the interior multi color led’s stay on unless I lock it. I couldn’t find any special delay timer for them in settings. I waited for 15 minutes, twice, with the fob 40 feet away or so, and led’s never went off (not referring to the map lights) if not locked, is that a thing? Part of the prob? Also notice my cooling fans stay on for 3 or 4 minutes after car turned off, even after a brief NON spirited drive. Otherwise enjoying the car. Just don’t want an “otherwise” in my car story ya know.
Thanks
Thanks
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Sungkyo (06-26-2023)
#112
Senior Member
Double lock and keep the key away and you will be just fine. Additionally, when next at your dealer double check that you have the most up to date software.
other than that - drive and enjoy your marvelous new car!
other than that - drive and enjoy your marvelous new car!
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#113
Junior Member
[QUOTE=Surge;8804140]You should always lock a modern car. Various systems will stay on unless locked. Any particular reason why you prefer to leave it unlocked? It should also automatically lock after a while, but that may need to be enabled in settings. I know my 2019 G Wagon (current gen) locks automatically, and I believe my 2019 AMG GTC also does.
You may be correct, but to answer your question, its probably just habit. I park just outside my office and I can see what I drove. I have never locked vehicles inside the garages, since garage locked and alarmed. Several decades of never having an issue or a battery story, and living in the Midwest I guess. (of course I lock at every location other than residences or office) Of the other vehicles, only my wife's Tesla automatically locks. But its set to NOT do that at home. I have 3 cars that always stay on a CTEK Mus 4.3 tender since seldom driven. But I planned to drive this one around 5K or 6K miles a year. I travel and sucks that I would need to put on a tender every time. This last trip that prompted the critical message, was just 3 days long.
Thanks!
You may be correct, but to answer your question, its probably just habit. I park just outside my office and I can see what I drove. I have never locked vehicles inside the garages, since garage locked and alarmed. Several decades of never having an issue or a battery story, and living in the Midwest I guess. (of course I lock at every location other than residences or office) Of the other vehicles, only my wife's Tesla automatically locks. But its set to NOT do that at home. I have 3 cars that always stay on a CTEK Mus 4.3 tender since seldom driven. But I planned to drive this one around 5K or 6K miles a year. I travel and sucks that I would need to put on a tender every time. This last trip that prompted the critical message, was just 3 days long.
Thanks!
#116
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AMG SL 55
There is now an open recall for the battery issue and they give you a free MB trickle charger. Hardly a fix for real problem.
#117
I drive my SL about an hour a week and I have no issues. In the beginning I kept getting emails about the low battery, I did charge it with the provided charger for a few days (car is just sitting a lot in the garage) and no issues afterwards. Maybe the trickle charger improved the battery charge a little?
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#118
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#119
2022 AMG SL63
I've been having the same battery issues since I purchased the car. dealer solution--they gave me a trickle charger ..that does not help. I still get low battery warinings
and now the car wouldn't start...and it was driven 3 days prior over 400 miles..so the car was charging the battery
anyone know if MB has solved this problem?
I'm being told its a software update issue...
and now the car wouldn't start...and it was driven 3 days prior over 400 miles..so the car was charging the battery
anyone know if MB has solved this problem?
I'm being told its a software update issue...
#120
MBWorld Fanatic!
I've been having the same battery issues since I purchased the car. dealer solution--they gave me a trickle charger ..that does not help. I still get low battery warinings
and now the car wouldn't start...and it was driven 3 days prior over 400 miles..so the car was charging the battery
anyone know if MB has solved this problem?
I'm being told its a software update issue...
and now the car wouldn't start...and it was driven 3 days prior over 400 miles..so the car was charging the battery
anyone know if MB has solved this problem?
I'm being told its a software update issue...
#122
Member
It's pretty sad that after 2 years, MB hasn't a clue. My hope of buying a SL63Se is rapidly fading. I spoke to two MB employees about 3 weeks ago. I inquired if solutions were at hand......"we're working on the fixes"
Meanwhile the R232 buyers are unpaid beta testers. Others on this forum accuse buyers of "bashing" which hurts resale...........sure! Giving you a trickle charger to fix inherent flaws is insulting.
There's a reason why MB is 2nd from the bottom in reliability ratings.
Meanwhile the R232 buyers are unpaid beta testers. Others on this forum accuse buyers of "bashing" which hurts resale...........sure! Giving you a trickle charger to fix inherent flaws is insulting.
There's a reason why MB is 2nd from the bottom in reliability ratings.
#123
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W463 G550 / C190 GTC //prev: W204 C63 507 / R170
That's certainly not from a real/reputable source.
I've had 5 Mercedes in 10 years and all have been very close to perfect. Much better than my new (at the time) 2012 Lexus, for that matter.
Current 2019 G550 and AMG GTC have had one 1 minor issue each in 4.5 years of ownership.
I've had 5 Mercedes in 10 years and all have been very close to perfect. Much better than my new (at the time) 2012 Lexus, for that matter.
Current 2019 G550 and AMG GTC have had one 1 minor issue each in 4.5 years of ownership.
#124
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It's not from CNN or Faux "news" if that's what you mean.
SOURCE: https://www.consumerreports.org/cars...s-a7824554938/
SOURCE: https://www.consumerreports.org/cars...s-a7824554938/
#125
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W463 G550 / C190 GTC //prev: W204 C63 507 / R170
Ok, Consumer Reports is legit. But --you need to dig into the specific models and issues. With CR, if the glovebox rattles, they will mark that the same way as if the car doesn't start.
As mentioned, I had a completely different experience with 5 MBs (2x B250, 1x C63, 1x G550, 1x AMG GTC) - all purchased new, starting in 2012.
My 2012 Lexus was terrible - poorly engineered and with a major reliability issue.
My parents' Infiniti QX50 is absolute garbage - not at all like the EX(?) that was made in Japan.
As mentioned, I had a completely different experience with 5 MBs (2x B250, 1x C63, 1x G550, 1x AMG GTC) - all purchased new, starting in 2012.
My 2012 Lexus was terrible - poorly engineered and with a major reliability issue.
My parents' Infiniti QX50 is absolute garbage - not at all like the EX(?) that was made in Japan.