When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The dealer replaced the electrohyrdraulic controller unit. Fingers crossed that this actually fixed the problem. I'm still waiting on the car because they are also replacing the exterior window trim.
2019 SL450, 2019 E450 Luxury Trim Wagon, 2024 BMW I7 xDrive60
Originally Posted by 1787
The dealer replaced the electrohyrdraulic controller unit. Fingers crossed that this actually fixed the problem. I'm still waiting on the car because they are also replacing the exterior window trim.
When I had this problem, they replaced the JOHNSON ROD. Unfortunately, it didn’t help, but it sounded like they were doing something.
The dealer replaced the electrohyrdraulic controller unit. Fingers crossed that this actually fixed the problem. I'm still waiting on the car because they are also replacing the exterior window trim.
Hmmm, is it inside the transmission, what is the part number? How long was the job, if it is inside the tranny, I guess they did ATFas well?
Do you mind posting the work order, don't worry about it if you don't want to.
The dealer replaced the electrohyrdraulic controller unit. Fingers crossed that this actually fixed the problem. I'm still waiting on the car because they are also replacing the exterior window trim.
let us know how it goes. I hope it works. While am not trying to scare you, personally I feel that this might not fix the inherent issue that most of owners are facing. To me, only the active force adaptation can fix (tech driving the car, computer connected, another tech in the passenger seat force-adapting all the shift points). This is already documented within the Mbenz service bulletins. Changing electrohyrdraulic controller unit may fix it for the first few days or 1-3 weeks for the first couple 100 miles, just like what a cheap coding/software reset would do. However, if the controller unit was truly damaged, that might fix it so let's see. Also, there is a chance that they have done force adaptation as a part of installing the new controller unit. In all case, keep the community here updated please, and good luck.
Hmmm, is it inside the transmission, what is the part number? How long was the job, if it is inside the tranny, I guess they did ATFas well?
Do you mind posting the work order, don't worry about it if you don't want to.
I forgot to scan the printout they gave me, but here is the description from the online portal of what they did. I will check the work order when I get home to see if there is any additional information on part # or description. They had the car for almost 2 weeks, which I imagine was mostly waiting on the part. So far, I do notice an improvement. I can still feel the 3-2 downshift being overly harsh, but not as frequently and not as severe as it was before. They are claiming that the transmission needs 300 miles to adapt to driving style, so fingers crossed, but I am skeptical and share the concern of S_W222.
Cause
Faulty electrohyrdraulic controller unit
Correction
Remove oil pan from automatic transmission, remove & replace electrohyrdraulic controller unit, install in reverse order. performed initial start up of electrohyrdraulic controller unit.fw Customer will need to drive 300 miles for valve body to adapt to driving style .
I forgot to scan the printout they gave me, but here is the description from the online portal of what they did. I will check the work order when I get home to see if there is any additional information on part # or description. They had the car for almost 2 weeks, which I imagine was mostly waiting on the part. So far, I do notice an improvement. I can still feel the 3-2 downshift being overly harsh, but not as frequently and not as severe as it was before. They are claiming that the transmission needs 300 miles to adapt to driving style, so fingers crossed, but I am skeptical and share the concern of S_W222.
Cause
Faulty electrohyrdraulic controller unit
Correction
Remove oil pan from automatic transmission, remove & replace electrohyrdraulic controller unit, install in reverse order. performed initial start up of electrohyrdraulic controller unit.fw Customer will need to drive 300 miles for valve body to adapt to driving style .
Thanks! Did they did the ATF as a result of the work?
Thanks! Did they did the ATF as a result of the work?
If you mean, did they change the transmission fluid, I would imagine so, since they had to remove the oil pan. But maybe I'm not understanding your question.
If you mean, did they change the transmission fluid, I would imagine so, since they had to remove the oil pan. But maybe I'm not understanding your question.
Yes, that is it. I was curious and found it weird it wasn't documented they did that but they couldn't have reused the fluid anyways.
Wonder why it can’t be changed back? If you can override the number why can’t you override it again?
Originally Posted by MBNUT1
You all might think this strange I find this kind of response somewhat comforting in that there is complete and forthright discussion of the problem and communication with the transmission engineering staff. It makes sense that they can't just roll out a software upgrade due to emissions certification requirements.
Additionally it echos what my indy has told me when I inquired regarding having the transmission shift quality improved via road test adaptations.
Wonder why it can’t be changed back? If you can override the number why can’t you override it again?
That was here somewhere in this long thread, probably as a screenshot, or at least I recall referring to it. I don't think he meant that it (can not) be reverted back ever, but he is saying the car itself won't adapt back naturally as it learns your shifting style to these values and will stay closer to the higher range of adaptation. Anyway I don't think that statement is a concern now. Just ask your dealer to follow the instructions given in this thread repeatedly, and things should be fine as it worked for several of us including me being the OP. Make sure to go to your dealer... No transmission reset or any of that sense proposed by some folks. You need your dealer, a tech with a PC in the passenger side running the adaptation while the car is being driven, and another tech driving the car for a good 30 min trip to find room to go through all gears that need to be re-adapted.
As the original OP of this thread, I'm glad to see that it has helped many of you work with your dealers to reference the correct MBenz bulletins and service notes I shared when I got mine fixed. However, it's unfortunate that the recent few posts have been hijacked by a particular guy promoting his services here instead of sticking to his own thread with single digit user replies. Disclaimer just for clarity: I have NOT used this individual to resolve the issue I originally reported in this thread, nor would I recommend him anyway for a thing like that. The point I want to clarify, he is excessively promoting his long promoting pictures here but he has no connection at all to my experience fixing this issue and other users who posted here over the years with good results as well on this issue under this thread. To avoid any confusion, let me be clear: the issue discussed in my post was resolved by my dealer, not through any third-party service or remote access coders. My personal opinion also is that I would never entrust a critical function like transmission shift point adjustments to someone claiming to do it remotely or overseas or whatever, especially when such work requires live (while driving) forced shift adaptation service. I have done remote coding for my cars for certain features, but things like transmission issues were ALL done through my dealer. Just sharing my story for the records.
Additional note for those with similar issues: If you've been experiencing this problem for some time (especially before your warranty expired), you "can" request that your dealer perform the service as a goodwill gesture. This is exactly what I did as I already reported years ago. Despite being out of warranty at that time, I received the service free of charge because I told them the problem had been ongoing for years, but I had only recently discovered the relevant bulletins.
To summarize and avoid further confusion as tracking original post/repair notes got lost over the years and many pages or posts here: #1) I've reattached a screenshot of the relevant service bulletins for you to present to your dealer, so you can easily find it. This is bulletins (LI27.60-P-071237 APR20 – 222, 217 for the 5 to 4 coasting downshift - shift quality concern) which contains clear instructions for MBenz technicians to address the issue. I’ve also included a PDF of the complete document. Hope it continues to help many of you. #2) VERY IMPORTANT: make sure to ask for "Force Adaptation" as a part of the process. Doing the software updates only as in the screenshot is not enough. See previous original posts on this thread for more on that, or simply also ask for the adaptation to be done while car is being driven. A few of us reported here that #1 and #2 was the ultimate solution (otherwise just reset or re-learning shift points via software re-set will only fix the issue for a few 100s of miles.. you need the adaptation values procedure to be performed by the tech)
Last, I just responded to a couple of you who reached out to me privately and shared my personal after-service notes as some requested (sent), but really the MBenz bulletins + asking for adaptation should be all you need to get the job done anyway. I don't mind sharing my service notes here, which I still have, if that helps anyone.
As the original OP of this thread, I'm glad to see that it has helped many of you work with your dealers to reference the correct MBenz bulletins and service notes I shared when I got mine fixed. However, it's unfortunate that the recent few posts have been hijacked by a particular guy promoting his services here instead of sticking to his own thread with single digit user replies. Disclaimer just for clarity: I have NOT used this individual to resolve the issue I originally reported in this thread, nor would I recommend him anyway for a thing like that. The point I want to clarify, he is excessively promoting his long promoting pictures here but he has no connection at all to my experience fixing this issue and other users who posted here over the years with good results as well on this issue under this thread. To avoid any confusion, let me be clear: the issue discussed in my post was resolved by my dealer, not through any third-party service or remote access coders. My personal opinion also is that I would never entrust a critical function like transmission shift point adjustments to someone claiming to do it remotely or overseas or whatever, especially when such work requires live (while driving) forced shift adaptation service. I have done remote coding for my cars for certain features, but things like transmission issues were ALL done through my dealer. Just sharing my story for the records.
Additional note for those with similar issues: If you've been experiencing this problem for some time (especially before your warranty expired), you "can" request that your dealer perform the service as a goodwill gesture. This is exactly what I did as I already reported years ago. Despite being out of warranty at that time, I received the service free of charge because I told them the problem had been ongoing for years, but I had only recently discovered the relevant bulletins.
To summarize and avoid further confusion as tracking original post/repair notes got lost over the years and many pages or posts here: #1) I've reattached a screenshot of the relevant service bulletins for you to present to your dealer, so you can easily find it. This is bulletins (LI27.60-P-071237 APR20 – 222, 217 for the 5 to 4 coasting downshift - shift quality concern) which contains clear instructions for MBenz technicians to address the issue. I’ve also included a PDF of the complete document. Hope it continues to help many of you. #2) VERY IMPORTANT: make sure to ask for "Force Adaptation" as a part of the process. Doing the software updates only as in the screenshot is not enough. See previous original posts on this thread for more on that, or simply also ask for the adaptation to be done while car is being driven. A few of us reported here that #1 and #2 was the ultimate solution (otherwise just reset or re-learning shift points via software re-set will only fix the issue for a few 100s of miles.. you need the adaptation values procedure to be performed by the tech)
Last, I just responded to a couple of you who reached out to me privately and shared my personal after-service notes as some requested (sent), but really the MBenz bulletins + asking for adaptation should be all you need to get the job done anyway. I don't mind sharing my service notes here, which I still have, if that helps anyone.
As promised, am adding to my previous post a screenshot of my service record at that time. You can see the notes in my service records about the car being already out of warranty, but Mbenz still did the repair 100% free (I simply states that the car had this rough down-shifting from the beginning even before warranty expired.. which was true.) In other words, I stated that I only learned about the service bulletin recently(at that time) and after warranty has expired, despite that the issue existed before then.
As promised, am adding to my previous post a screenshot of my service record at that time. You can see the notes in my service records about the car being already out of warranty, but Mbenz still did the repair 100% free (I simply states that the car had this rough down-shifting from the beginning even before warranty expired.. which was true.) In other words, I stated that I only learned about the service bulletin recently(at that time) and after warranty has expired, despite that the issue existed before then.
Had my 2020 S560 back to the dealership after they finally agreed to do the forced adaptation. They did everything EXCEPT the forced adaptation. Said that is not something they do on the 9-speed. Again said MB knows about this and already has a software fix -- but are waiting on the US government to approve it. SURE. So now we've gone from saying there isn't a problem, all in spec ... to it's a hardware problem, no it's a software problem ... to it's now in the US government's lap. jesus.
Had my 2020 S560 back to the dealership after they finally agreed to do the forced adaptation. They did everything EXCEPT the forced adaptation. Said that is not something they do on the 9-speed. Again said MB knows about this and already has a software fix -- but are waiting on the US government to approve it. SURE. So now we've gone from saying there isn't a problem, all in spec ... to it's a hardware problem, no it's a software problem ... to it's now in the US government's lap. jesus.
Ugh, try a different dealership if the current one isn't understanding or helpful for that matter.
2019 SL450, 2019 E450 Luxury Trim Wagon, 2024 BMW I7 xDrive60
Originally Posted by epnfrn
Had my 2020 S560 back to the dealership after they finally agreed to do the forced adaptation. They did everything EXCEPT the forced adaptation. Said that is not something they do on the 9-speed. Again said MB knows about this and already has a software fix -- but are waiting on the US government to approve it. SURE. So now we've gone from saying there isn't a problem, all in spec ... to it's a hardware problem, no it's a software problem ... to it's now in the US government's lap. jesus.
I went through this TWICE! First, I ordered a 2020 S560 to replace my 2018 S560. The car was great for about 10K miles as I recall, but then it developed a very harsh 3-2 downshift. After two or three visits to the dealer, they said that MBUSA had authorized them to replace the transmission and torque converter. So, I took the car in and they "said" they did the swap, but I really have my doubts, as the 3-2 downshift was as bad--if not worse--than before they "replaced" everything. MBUSA bought the car back.
About two years later, after a bout with a 2022 S580, I needed a car and there was a CPO S560 on my local dealer's lot with 8800 miles on it. It was a very late production car and still had about 18 months of the original factory warranty. I bought the car. After about another 8K miles, IT developed a harsh 3-2 downshift. MBUSA bought THAT car back.
As far as I was able to ascertain, the dealers are NOT allowed to fool with the way the transmission shifts, without risking the EPA certification that MB has for the cars. Anyway, I am now in a new BMW I7 electric and it is SO nice to have no gears shifting--not to mention not having to put gas in the car and the absolutely silent propulsion.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
