We have a number of video on this issue. If anyone is having issues with their hybrid, please "contact the YOUCANIC" team (Google it). We can help you troubleshoot the problem FREE of charge as long as you can send us the codes. We need the codes from these four modules (Engine ECU, DC/DC converter, BMS, Power Electronic Module). Once we have the codes, we can tell you if you have a bad power electronic module, hybrid battery or both. If your vehicle is at the dealership, ask them for the list of codes and send them to us. If you want to ship the car to Baltimore, we can repair it at a fraction of the dealer cost. We love these cars and believe that is a sin to pay over $10k to keep these cars running.
The S400 is a living nightmare, period!!! The so-called "hybrid" fails, with the Power Control Module, and the High Voltage Generator; the car will simply not start and leave you stranded, or worse! And the cost of replacement is $12,000! And no you can't simply purchase a used unit, because they all suffer from the same burn-out failure, and no one can work on these cars; even the main dealer only had one technician. I had two units replaced under warranty; each with the same issues. It is a serious design fault that Mercedes tried to ignore, and brush under the carpet, even though there were warnings sent to the dealership. Replacement units are ordered from German on an "exchange" policy, so normally no one gets to see what failed including the technician, as the unit is sealed. As luck would have it, my dealer forgot to return the failed unit and left it in the boot; so after asking if they wanted it back, which they declined, I decided to dismantle it, to see what the cause was. The Power Control Module has three separate phases which receive voltage from three generators attached to the fly-wheel. One of the phases had been subjected to so much power it had caught fire and melted the coil wire in half! Oh, and let's not forget the Power Control Module, is a sealed air-tight unit, and the S400 had a 60amp generator, so imagine how many amps had to be sent through the wire to catch fire and melt it! My car even after the two replacement units, would start once, and then it may or may not start again, and don't forget it has a stop/start system that "can't" be turned off, so every time you go below 7mph the shuts down, and could leave you stranded with no power. So dangerous was this; imagine trying to turn across oncoming traffic and finding your engine isn't restarting, that my insurance company determined the car dangerous to the point they totaled a 4 yrs old S-class and paid me out! I love the S-class, so I purchased a reliable S63 with no safety issues. So if you are tempted by an S400, please don't the cars can be lethal!
Thank you for the feedback. We talk to S400 owners all the time, and this is a very common experience unfortunately. We have had S400 Hybrids shipped from California to our shop in Baltimore to be fixed because the dealer was too expensive. Shipping that car from cost to coast and back was $3500. It still made more sense to ship it for the owner. There are a few points that we would like to emphasize: - At dealerships the power electronic module is around $11k while hybrid battery replacement around $15k. - Having seen so many S400, we believe that this vehicle does have a design flow. In fact, it has a several design flow with the hybrid system. Disabling the automatic start/stop function can help the hybrid system last a lot longer. It can be done. - We have fixed S400 that dealerships misdiagnosed. The problem was completely different than what the dealer had said. We have those documented too. Most dealerships don't work on S400 on regular basis. Some of them don't even know how to place the S400 in neutral when the car doesn't start. Yes, you can. - The power electronic module overheats and fails inside due to location and also to the way it operates. We open those units up and rebuild them with upgraded parts. - Lastly, most mechanics don't want to touch an S400. We have had several shipped to Baltimore from all over the country. Enjoy your S63 AMG!
@@YOUCANIC I'm curious how can you disable the stop-start, which kicks in at below 7mph? Looking at the wiring schematics, the signal the stop and start the engine is part of the ME-SFI [ME] control unit using the electric motor. The automatic start can only be triggered if an automatic engine stop has been triggered, the protection switch of the high-voltage battery is closed; there are no faults in the high-voltage on-board electrical system via the ME-SFI, and the high-voltage interlock is open. Additionally, if the car is fitted with Distronic Plus even more issues exist. If the radar sensor control unit (SGR) with adaptive cruising control, withdraws approval from the automatic engine stop, this triggers an automatic engine start and Disctronic Plus can accelerate the vehicle . If approval is withdrawn by the ACC [KLA]control unit, the fully integrated transmission control (VGS) control unit or the energy management system, the braking torque must be high enough, over a specified deceleration torque to trigger an automatic engine start. Furthermore, the entire system is being calculated by the ME-SFI [ME] control unit in order to calculate and check for plausibility, of the fuel injection and ignition coils function, depending if the start is a torque-led start or a speed-led start. In other words, 31 separate control modules or components are connected to the ME-SFI module which controls the Automatic engine start. Also, the Power Electronics Module doesn't just fail due to overheating, or location, if that were the case all replacement parts would fail, regardless of their quality, making replacement of the unit futile; but rather due to excessive amperage being generated by the Electric Motor switching between individual operation modes, i.e. motor mode/alternator mode. Basically, the motor has three busbars; these three phases are regulated depending on the operation mode of the rotor position. If one of these phases fails, or the temperature threshold is exceeded, and controlled protection of the system is not limited, excessive power can be generated and overheating of the Power Electronics Module occurs, resulting in the eventual complete destruction of the affected phased regulator within the Power Electronics Module. Mercedes does not want you to know the true facts, being that it was part of their flagship S-class model and their blanket refusal to acknowledge the true reason behind the nightmare, not to mention the cost to many unsuspecting customers, who are still buying this piece of junk!
Hi, I have a 2011 S400 and had the battery replaced. However, the ac is not working properly and wondering if this is the cause for battery not charging properly?
thanks for information....may I ask you something.....I am interested to buy that hybrid Mercedes....in relation to the lifetime of the battery....better to buy a used car with less or more driven kilometers?...thanks and be good
sir i have a w222 MB..it was park for a long time.... engine non start and no cranking... the contractor does not change value it is alway open even in ignition on... is trhere a way to repair this contractor??? need to replace the hybrid battery??? THANKS IN ADVANCE
I'm curious, what are the connections to the vehicle is it only the HV main wires as the BMS is all internal, or does the BMS talk to the vehicle? If there are additional connections other than the 2 HV wires, how many are there and do you know what they do?
Hey man i got a question can the refrigerent ac line connector on the battery can be removed easily without damaging anything inside the battery Reason im asking is i got a battery with that connector being upside down somehow and now i cant pmug my ac line directly into it without switching the connector upsidedown ? Thank you
Thanks for reaching out! Removing the refrigerant AC line connector from the battery without causing damage can be a tricky task, especially if it’s upside down. For detailed guidance, you might find our factory repair manuals at www.youcanic.com useful. Youcanic is here to empower and support car owners like you in handling such challenges confidently. If you need further assistance, feel free to ask on our website. We’re all about making your car ownership experience easier and more cost-efficient!
First of all you guys are amazing. Second can I ship you my battery to have it diagnosed. Please let me know what options I have and thank you for your time vested into these inherent problems. Very cutting edge
It seems you might be asking about a specific procedure that wasn't clearly shown in the video. We suggest visiting our website, YOUCANIC, for detailed guides and personal assistance. Additionally, our Full System Scanner might help as it's designed to aid in diagnosing car issues. Check it out here: www.youcanic.com/scanner. If you need further help, feel free to ask questions on our platform: www.youcanic.com. We're dedicated to making car repairs easy to understand and offering support is part of our mission. You'll find a wealth of information and assistance at YOUCANIC.
Hi can I send you a vidéo of the three phase reading in amp from scanner. When in start mode the reading of u phase stay at 0 but phase v and w goes to 50 amp aprox.
Yes, it is possible to replace your s400h 2016 battery with a bigger one. However, you need to assure the new battery will fit in the compartment properly and it won’t interfere with other components of your vehicle. For more information and clarity on this matter, feel free to ask questions or seek advice on YOUCANIC; a platform dedicated to helping car owners like you. To further assist you in diagnosing car issues, YOUCANIC provides a Full System Scanner that serves as a personal mechanic at your fingertips. Check it out here: www.youcanic.com/scanner. Be confident in your repairs and let YOUCANIC be your trustworthy automotive guide.
Hi, i have the 2014 E300 Hybrid 2.1diesel, ESTATE and its saying (auxiliary battery malfunction), i dont know which is the auxiliary battery , a large normal battery in the boot, or the one you have just shown us under the bonnet, and i thought my battery pack was under the rear seats and much larger pack than the front pack you just shown us. thanks for reading. Colin
Auxiliary battery is the tiny battery under the dashboard. Car will run and drive fine with this warning. Search on Google Mercedes Auxiliary Warning by youcanic. We have a couple of articles and videos on this
At the dealership power electronic module replacement costs around $10k. Hybrid battery replacement costs $15k. Those repairs can be done for less than $5k if you find a good indipended shop. The problem is that it is hard to find a shop that will touch these cars. We can help as well if you are willing to ship a car to Baltimore. We have had S400 shipped to Baltimore from as far as the west coast.
Yes but it is very labor intensive job and complex to remove the whole hybrid system and basically convert it to a S350 gasoline. Also requires coding as well of multiple ecus.
Thanks for your comment! At Youcanic, we're committed to helping car owners like you save money and feel more confident in handling car maintenance. We provide helpful guides, free resources, and even our Youcanic scanner. Check us out at www.youcanic.com. If you need more specific details, we also offer factory repair manuals. Please don't hesitate to reach out on our site if you need any assistance at all. Our mission is to empower you and making your car ownership journey easier. We're here to support you!
I own this car and this is the problem I just have with it, well my mechanic is telling me this. Could you tell me how he can know that BMS has to be replace??? He just disconnect the battery from the car and said it's broken and has to be replace for the new one. Prices are crazy. Please help.
Hi Lukas, Yes fixing this problem can be very expensive but don't rush. We are here to help you save a lot of money. When the battery goes bad it sets a few diagnostic trouble codes (DTCs) in the battery management system (BMS). We have a number of articles to help you understand this issue. You can search them on Google by adding YOUCANIC to your search term. Also we can guide you on how to save money on the parts if you need help. Just send us an email and we are happy to help. Just search "Contact YOUCANIC" on Google and send us an email. Also let us know where you are located.
It depends what has failed. There are a few things that can go wrong. Some issues can be fixed while others are a bit more complicated. Second had units are around $10k for the w222.
E300 Hybrid 2013 Insulation fault in high-voltage on-board electrical system. this is the fault code I have. the car doesnt start unless I deleted to errors. battery charges normally when driving. Any recomandations on what it could be? Thanks
@@aldonachrzastek2215 yes, the problem was the main computer on the car, that was creating the problem. I found a very good eletricion who resolved the problem
Can you please provide us with some more details? Send us the faul codes from these three modules ECU, Sg-em, sg-bms. Email them at support @ youcanic. com and we can help you figure out what is wrong.
![[[OFFICIAL MV]] เอิ้นขวัญให้อ้าย- อ๊ะอาย สกุณาพร | ค่ายเพลงเป็นหนึ่ง](http://i.ytimg.com/vi/83x6L3X3qh0/mqdefault.jpg)
We have a number of video on this issue. If anyone is having issues with their hybrid, please "contact the YOUCANIC" team (Google it). We can help you troubleshoot the problem FREE of charge as long as you can send us the codes. We need the codes from these four modules (Engine ECU, DC/DC converter, BMS, Power Electronic Module). Once we have the codes, we can tell you if you have a bad power electronic module, hybrid battery or both. If your vehicle is at the dealership, ask them for the list of codes and send them to us. If you want to ship the car to Baltimore, we can repair it at a fraction of the dealer cost. We love these cars and believe that is a sin to pay over $10k to keep these cars running.
Would you be able to source one, fix it and send to Australia?
@@drum1755 will have to look into this but for now let's continue with our conversation on YOUCANIC >Support
After I get the codes, can I email them to you?
If so, then what's the email address?
The S400 is a living nightmare, period!!! The so-called "hybrid" fails, with the Power Control Module, and the High Voltage Generator; the car will simply not start and leave you stranded, or worse! And the cost of replacement is $12,000! And no you can't simply purchase a used unit, because they all suffer from the same burn-out failure, and no one can work on these cars; even the main dealer only had one technician. I had two units replaced under warranty; each with the same issues. It is a serious design fault that Mercedes tried to ignore, and brush under the carpet, even though there were warnings sent to the dealership. Replacement units are ordered from German on an "exchange" policy, so normally no one gets to see what failed including the technician, as the unit is sealed. As luck would have it, my dealer forgot to return the failed unit and left it in the boot; so after asking if they wanted it back, which they declined, I decided to dismantle it, to see what the cause was. The Power Control Module has three separate phases which receive voltage from three generators attached to the fly-wheel. One of the phases had been subjected to so much power it had caught fire and melted the coil wire in half! Oh, and let's not forget the Power Control Module, is a sealed air-tight unit, and the S400 had a 60amp generator, so imagine how many amps had to be sent through the wire to catch fire and melt it! My car even after the two replacement units, would start once, and then it may or may not start again, and don't forget it has a stop/start system that "can't" be turned off, so every time you go below 7mph the shuts down, and could leave you stranded with no power. So dangerous was this; imagine trying to turn across oncoming traffic and finding your engine isn't restarting, that my insurance company determined the car dangerous to the point they totaled a 4 yrs old S-class and paid me out! I love the S-class, so I purchased a reliable S63 with no safety issues. So if you are tempted by an S400, please don't the cars can be lethal!
Thank you for the feedback. We talk to S400 owners all the time, and this is a very common experience unfortunately. We have had S400 Hybrids shipped from California to our shop in Baltimore to be fixed because the dealer was too expensive. Shipping that car from cost to coast and back was $3500. It still made more sense to ship it for the owner. There are a few points that we would like to emphasize:
- At dealerships the power electronic module is around $11k while hybrid battery replacement around $15k.
- Having seen so many S400, we believe that this vehicle does have a design flow. In fact, it has a several design flow with the hybrid system. Disabling the automatic start/stop function can help the hybrid system last a lot longer. It can be done.
- We have fixed S400 that dealerships misdiagnosed. The problem was completely different than what the dealer had said. We have those documented too. Most dealerships don't work on S400 on regular basis. Some of them don't even know how to place the S400 in neutral when the car doesn't start. Yes, you can.
- The power electronic module overheats and fails inside due to location and also to the way it operates. We open those units up and rebuild them with upgraded parts.
- Lastly, most mechanics don't want to touch an S400. We have had several shipped to Baltimore from all over the country.
Enjoy your S63 AMG!
@@YOUCANIC I'm curious how can you disable the stop-start, which kicks in at below 7mph? Looking at the wiring schematics, the signal the stop and start the engine is part of the ME-SFI [ME] control unit using the electric motor. The automatic start can only be triggered if an automatic engine stop has been triggered, the protection switch of the high-voltage battery is closed; there are no faults in the high-voltage on-board electrical system via the ME-SFI, and the high-voltage interlock is open. Additionally, if the car is fitted with Distronic Plus even more issues exist. If the radar sensor control unit (SGR) with adaptive cruising control, withdraws approval from the automatic engine stop, this triggers an automatic engine start and Disctronic Plus can accelerate the vehicle . If approval is withdrawn by the ACC [KLA]control unit, the fully integrated transmission control (VGS) control unit or the energy management system, the braking torque must be high enough, over a specified deceleration torque to trigger an automatic engine start. Furthermore, the entire system is being calculated by the ME-SFI [ME] control unit in order to calculate and check for plausibility, of the fuel injection and ignition coils function, depending if the start is a torque-led start or a speed-led start. In other words, 31 separate control modules or components are connected to the ME-SFI module which controls the Automatic engine start. Also, the Power Electronics Module doesn't just fail due to overheating, or location, if that were the case all replacement parts would fail, regardless of their quality, making replacement of the unit futile; but rather due to excessive amperage being generated by the Electric Motor switching between individual operation modes, i.e. motor mode/alternator mode. Basically, the motor has three busbars; these three phases are regulated depending on the operation mode of the rotor position. If one of these phases fails, or the temperature threshold is exceeded, and controlled protection of the system is not limited, excessive power can be generated and overheating of the Power Electronics Module occurs, resulting in the eventual complete destruction of the affected phased regulator within the Power Electronics Module. Mercedes does not want you to know the true facts, being that it was part of their flagship S-class model and their blanket refusal to acknowledge the true reason behind the nightmare, not to mention the cost to many unsuspecting customers, who are still buying this piece of junk!
Very informative and well explained. Thank you very much indeed.
Glad we could help.
can you show how to programing used hybrid battery?
Hi, I have a 2011 S400 and had the battery replaced. However, the ac is not working properly and wondering if this is the cause for battery not charging properly?
thanks for information....may I ask you something.....I am interested to buy that hybrid Mercedes....in relation to the lifetime of the battery....better to buy a used car with less or more driven kilometers?...thanks and be good
sir i have a w222 MB..it was park for a long time.... engine non start and no cranking... the contractor does not change value it is alway open even in ignition on... is trhere a way to repair this contractor??? need to replace the hybrid battery??? THANKS IN ADVANCE
I'm curious, what are the connections to the vehicle is it only the HV main wires as the BMS is all internal, or does the BMS talk to the vehicle? If there are additional connections other than the 2 HV wires, how many are there and do you know what they do?
Hey man i got a question can the refrigerent ac line connector on the battery can be removed easily without damaging anything inside the battery
Reason im asking is i got a battery with that connector being upside down somehow and now i cant pmug my ac line directly into it without switching the connector upsidedown ?
Thank you
Thanks for reaching out! Removing the refrigerant AC line connector from the battery without causing damage can be a tricky task, especially if it’s upside down. For detailed guidance, you might find our factory repair manuals at www.youcanic.com useful.
Youcanic is here to empower and support car owners like you in handling such challenges confidently. If you need further assistance, feel free to ask on our website. We’re all about making your car ownership experience easier and more cost-efficient!
What about w222 post 2014 models? S400 hybrid 2015 and onwards?
First of all you guys are amazing. Second can I ship you my battery to have it diagnosed. Please let me know what options I have and thank you for your time vested into these inherent problems. Very cutting edge
How did you manage to open the sealed case? Did you just grind through all of the factory weld?
It seems you might be asking about a specific procedure that wasn't clearly shown in the video. We suggest visiting our website, YOUCANIC, for detailed guides and personal assistance. Additionally, our Full System Scanner might help as it's designed to aid in diagnosing car issues. Check it out here: www.youcanic.com/scanner.
If you need further help, feel free to ask questions on our platform: www.youcanic.com. We're dedicated to making car repairs easy to understand and offering support is part of our mission. You'll find a wealth of information and assistance at YOUCANIC.
Hi can I send you a vidéo of the three phase reading in amp from scanner.
When in start mode the reading of u phase stay at 0 but phase v and w goes to 50 amp aprox.
Hi, for s400h 2016, is it possible to replace the battery with a bigger one?
Yes, it is possible to replace your s400h 2016 battery with a bigger one. However, you need to assure the new battery will fit in the compartment properly and it won’t interfere with other components of your vehicle. For more information and clarity on this matter, feel free to ask questions or seek advice on YOUCANIC; a platform dedicated to helping car owners like you.
To further assist you in diagnosing car issues, YOUCANIC provides a Full System Scanner that serves as a personal mechanic at your fingertips. Check it out here: www.youcanic.com/scanner. Be confident in your repairs and let YOUCANIC be your trustworthy automotive guide.
@YOUCANIC thank you!
Hi, i have the 2014 E300 Hybrid 2.1diesel, ESTATE and its saying (auxiliary battery malfunction), i dont know which is the auxiliary battery , a large normal battery in the boot, or the one you have just shown us under the bonnet, and i thought my battery pack was under the rear seats and much larger pack than the front pack you just shown us. thanks for reading. Colin
Auxiliary battery is the tiny battery under the dashboard. Car will run and drive fine with this warning. Search on Google Mercedes Auxiliary Warning by youcanic. We have a couple of articles and videos on this
How much can I expect the cost of repair ? Tons of e300 hybrid are going cheap compares to non hybrid. If the price is ok, thinking of buying one
At the dealership power electronic module replacement costs around $10k. Hybrid battery replacement costs $15k. Those repairs can be done for less than $5k if you find a good indipended shop. The problem is that it is hard to find a shop that will touch these cars. We can help as well if you are willing to ship a car to Baltimore. We have had S400 shipped to Baltimore from as far as the west coast.
Any way of totally removing the hybrid system from the car and turn it into a regular gas or diesel powered conventional car?
Yes but it is very labor intensive job and complex to remove the whole hybrid system and basically convert it to a S350 gasoline. Also requires coding as well of multiple ecus.
Hi, I got s400 hybrid can i drive it even if the hybrid bateria doesn't work? I mean only with petrol.
no you cannot, your car dosnt have a starter, the hybrid motor starts the engine, if your hybrid battery goes bad car wont start
Super gemacht
bonjour ou pourrais acheter SVP MERCI
Thanks for your comment! At Youcanic, we're committed to helping car owners like you save money and feel more confident in handling car maintenance. We provide helpful guides, free resources, and even our Youcanic scanner. Check us out at www.youcanic.com.
If you need more specific details, we also offer factory repair manuals. Please don't hesitate to reach out on our site if you need any assistance at all. Our mission is to empower you and making your car ownership journey easier. We're here to support you!
I own this car and this is the problem I just have with it, well my mechanic is telling me this. Could you tell me how he can know that BMS has to be replace??? He just disconnect the battery from the car and said it's broken and has to be replace for the new one. Prices are crazy. Please help.
Hi Lukas, Yes fixing this problem can be very expensive but don't rush. We are here to help you save a lot of money.
When the battery goes bad it sets a few diagnostic trouble codes (DTCs) in the battery management system (BMS). We have a number of articles to help you understand this issue. You can search them on Google by adding YOUCANIC to your search term.
Also we can guide you on how to save money on the parts if you need help. Just send us an email and we are happy to help. Just search "Contact YOUCANIC" on Google and send us an email. Also let us know where you are located.
Can you replace the 30amp internal fuse in the high voltage battery?
It's not designed to be replaced. If that fuse blew you got bigger problems going on.
Yes I've already replaced the DC/DC converter... which that fuse feeds
Hi
Have been able to repair w222 mercedes s400h battery?
It depends what has failed. There are a few things that can go wrong. Some issues can be fixed while others are a bit more complicated. Second had units are around $10k for the w222.
E300 Hybrid 2013
Insulation fault in high-voltage on-board electrical system. this is the fault code I have. the car doesnt start unless I deleted to errors. battery charges normally when driving. Any recomandations on what it could be? Thanks
how many miles does your car have
@@HamzaGuzel690 120k
Hi, did u find the solution? I have the exact same problem.
@@aldonachrzastek2215 yes, the problem was the main computer on the car, that was creating the problem.
I found a very good eletricion who resolved the problem
@@aldonachrzastek2215 i paid 2000 euro for the problem to be solved
Help
Can you please provide us with some more details? Send us the faul codes from these three modules ECU, Sg-em, sg-bms. Email them at support @ youcanic. com and we can help you figure out what is wrong.
Replacement Mercedes-Benz S400 Hybrid Parts:
shop.youcanic.com/search?q=s400+hybrid