First mods order going in: Need your help picking ECU plz
Member
Joined: Mar 2007
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I heard JB4 does not work well on 19’s. And from my experience for some reason every seems to be different with JB4. Even on other platforms. Audi guys having issues with it. Renntech will be my choice in the spring.
Junior Member
Joined: Mar 2019
Posts: 17
Likes: 2
C43
AMR is a joke... sent my ECU to them 3 times and everytime my car was not even driveable.. ended up paying to put my ecu back to stock... complete waste of 3500$ and month with car down.. and they kept giving excuse after excuse as to why their tune wasn’t working and that it wasn’t their tune it was an electrical issue with my 2019 with less than 1000 miles... they told me to take the car to dealer.. once sealer confirmed no electrical issues.. AMR then stated my car wasn’t running with their tune because of a small plastic clip that was broken that the dealer later confirmed has nothing to do with the car or the way it runs just a piece of plastic... AMR and Matt are very unprofessional and blocked me on Instagram.... childish... all because I paid them $3500 to tune my car and they couldn’t even do tune it ...
Member
Joined: Jul 2018
Posts: 108
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From: Deep South, Taiwan
Tuned '18 C43 coupe & Stock '18 GLE43 coupe
AMR is a joke... sent my ECU to them 3 times and everytime my car was not even driveable.. ended up paying to put my ecu back to stock... complete waste of 3500$ and month with car down.. and they kept giving excuse after excuse as to why their tune wasn’t working and that it wasn’t their tune it was an electrical issue with my 2019 with less than 1000 miles... they told me to take the car to dealer.. once sealer confirmed no electrical issues.. AMR then stated my car wasn’t running with their tune because of a small plastic clip that was broken that the dealer later confirmed has nothing to do with the car or the way it runs just a piece of plastic... AMR and Matt are very unprofessional and blocked me on Instagram.... childish... all because I paid them $3500 to tune my car and they couldn’t even do tune it ...
People still sent their ECU in for flash now? They opened up your ECU?
Hope you got your money back....
Member
Joined: Jul 2018
Posts: 108
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From: Deep South, Taiwan
Tuned '18 C43 coupe & Stock '18 GLE43 coupe
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From: Omaha, NE
'16 AMG GTS, '21 AMG GLE53
Enjoy your car and good luck
Junior Member
Joined: Jul 2018
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2019 C43 AMG Coupe
I did a Renntech ECU+ tune to my 19' coupe a few months ago, and I can say that you definitely can feel a difference. I went with Renntech because I feel like they are the safest option when tuning.
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MBWorld Fanatic!
Joined: Nov 2016
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
I consider JB4 safe as well because of the simple fact that I can switch between the maps. Meaning, on a hot day, I go to Map 0 and run the car stock, with no additional stress on the engine. On a cold and dry night, I turn the map up, that too if I am feeling the need to go faster, cause the cold air can offset the cooling required for the higher boost levels. Most of time I just use Map 1 to get a mild bump in performance. And all this I have the luxury to do from my cellphone. So I would say the JB4 is just as safe. In a group of 50 to 60 guys in our JB4 whatsapp group, we have had no blown engines or turbo so far. And some of the guys there drives their car downright crazy.
Last edited by munis; Aug 21, 2019 at 06:34 PM.
Former Vendor of MBWorld
Joined: Dec 2005
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From: Simi Valley, California
2018 C63 Sedan
You are not wrong. They are the APR equivalent in the Mercedes tuning world. They do things properly with R&D backing up each car they tune. More than that I know for a fact the main guys are Renntech are very well connected with some AMG programmers and engineers. Do not think Renntech engineers do not know how to crank up the boost and make more power, they consciously choose not to cause they know better.
I consider JB4 safe as well because of the simple fact that I can switch between the maps. Meaning, on a hot day, I go to Map 0 and run the car stock, with no additional stress on the engine. On a cold and dry night, I turn the map up, that too if I am feeling the need to go faster, cause the cold air can offset the cooling required for the higher boost levels. Most of time I just use Map 1 to get a mild bump in performance. And all this I have the luxury to do from my cellphone. So I would say the JB4 is just as safe. In a group of 50 to 60 guys in our JB4 whatsapp group, we have had no blown engines or turbo so far. And someone the guys there drives their car downright crazy.
I consider JB4 safe as well because of the simple fact that I can switch between the maps. Meaning, on a hot day, I go to Map 0 and run the car stock, with no additional stress on the engine. On a cold and dry night, I turn the map up, that too if I am feeling the need to go faster, cause the cold air can offset the cooling required for the higher boost levels. Most of time I just use Map 1 to get a mild bump in performance. And all this I have the luxury to do from my cellphone. So I would say the JB4 is just as safe. In a group of 50 to 60 guys in our JB4 whatsapp group, we have had no blown engines or turbo so far. And someone the guys there drives their car downright crazy.
You should see how I rape all of my cars all in the name of testing and development
I blew my 335i N54 motor pushing 850+whp at 44psi... I found that limit LOL!
-Payam
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Joined: Mar 2007
Posts: 166
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I’m just waiting till the spring. 1st oil change. I will probably have around 1300-1500 miles. I’m gonna do Renntech. JB4 not for me. I’m just a set it and forget guy. I’m not going to be disconnecting sensors when I have an issue and need to remove. I will just unload the tune and take my chances. If they wanna get you. They gonna get you. My dealer is really cool and I don’t believe I’m going to have an issue regardless.
Member
Joined: Jan 2009
Posts: 201
Likes: 71
Mercedes and BMW
AMR is a joke... sent my ECU to them 3 times and everytime my car was not even driveable.. ended up paying to put my ecu back to stock... complete waste of 3500$ and month with car down.. and they kept giving excuse after excuse as to why their tune wasn’t working and that it wasn’t their tune it was an electrical issue with my 2019 with less than 1000 miles... they told me to take the car to dealer.. once sealer confirmed no electrical issues.. AMR then stated my car wasn’t running with their tune because of a small plastic clip that was broken that the dealer later confirmed has nothing to do with the car or the way it runs just a piece of plastic... AMR and Matt are very unprofessional and blocked me on Instagram.... childish... all because I paid them $3500 to tune my car and they couldn’t even do tune it ...
I am out in Cali and have sent my ecu to them half dozen times and Matt goes out of his way to ensure great customer service and experience. Not once I experienced any unpleasantness or ecu related issues. I am sorry you didn’t get the tune you wanted but there are times the removal process could affect the ecu. The two harnesses that goes into the ecu, when you unplugged them, could it possibly be bent when you reinstalled the harness when you got the ecu back? I have seen harnesses go back into electrical components and cause something to happen, but you did indicate the dealer couldn’t find an issue. Good luck and hopefully you get your tuned.
Member
Joined: Jul 2018
Posts: 108
Likes: 40
From: Deep South, Taiwan
Tuned '18 C43 coupe & Stock '18 GLE43 coupe
Wow.. i guess these folks don't like to talk about it... or signed an NDA... 
Nice! Wonder what kind of Dragy times a Renntech tune can do. I understand is a "safer" tune back by MB, but some actual performance times would be interesting...
Anyone look at the Brabus tune?
Anyone look at the Brabus tune?
Junior Member
Joined: Mar 2019
Posts: 17
Likes: 2
C43
I am trying to understand what you said, by chance did you before removing the ecu and allowing the car to sleep? What is the plastic clip you are referring too? How did this get brought into the conversation with you and AMR? I am sure AMR would have flashed your ecu back to stock without a fee or was it flashed somewhere else?
I am out in Cali and have sent my ecu to them half dozen times and Matt goes out of his way to ensure great customer service and experience. Not once I experienced any unpleasantness or ecu related issues. I am sorry you didn’t get the tune you wanted but there are times the removal process could affect the ecu. The two harnesses that goes into the ecu, when you unplugged them, could it possibly be bent when you reinstalled the harness when you got the ecu back? I have seen harnesses go back into electrical components and cause something to happen, but you did indicate the dealer couldn’t find an issue. Good luck and hopefully you get your tuned.
I am out in Cali and have sent my ecu to them half dozen times and Matt goes out of his way to ensure great customer service and experience. Not once I experienced any unpleasantness or ecu related issues. I am sorry you didn’t get the tune you wanted but there are times the removal process could affect the ecu. The two harnesses that goes into the ecu, when you unplugged them, could it possibly be bent when you reinstalled the harness when you got the ecu back? I have seen harnesses go back into electrical components and cause something to happen, but you did indicate the dealer couldn’t find an issue. Good luck and hopefully you get your tuned.
Im assuming you don’t have a 2019... as I said I have friends with 17-18 that have no problems.. as for you saying it’s my fault for removal... I replaced no electrical/ plastic clips... car is now HD tuned and runs fine... they have something to hide they wana block me and have my post removed...
Member
Joined: Jan 2009
Posts: 201
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Mercedes and BMW
Im assuming you don’t have a 2019... as I said I have friends with 17-18 that have no problems.. as for you saying it’s my fault for removal... I replaced no electrical/ plastic clips... car is now HD tuned and runs fine... they have something to hide they wana block me and have my post removed...
Im assuming you don’t have a 2019... as I said I have friends with 17-18 that have no problems.. as for you saying it’s my fault for removal... I replaced no electrical/ plastic clips... car is now HD tuned and runs fine... they have something to hide they wana block me and have my post removed...
We need a tune that was designed for 2019 - not adapted from the previous. Something is different about the turbos or some supplemental equipment that affect how the turbos work.
When that happens - i'll be willing to try it out.
When that happens - i'll be willing to try it out.
Member
Joined: Aug 2019
Posts: 89
Likes: 12
C43
Yes. Drive the car stock for a few thousand km and enjoy it as it is for a while. At no point did I ever feel that a stock C43 is slow. If you get bored after a while only then get the tune. Renntech is a great choice.
Also if you are driving only a few miles everyday, you car is not even getting enough time to warm up to working temperature which will allow you to push it. Go to AMG menu and wait for the temperature numbers to turn white from blue before you start pushing the car.
I have no idea why you are opposed to JB4, but in your requirement, it is the perfect tune for you. Cause you keep it in Map 0 (stock) for daily driving and if you are going for extended drives, only then switch to higher maps. It is still one of the fastest tune for this car when you want to be fast, and when you want to be stock you can be stock. All this you can do in seconds from the mobile app. But either way Renntech is a fantastic tune too.
Also if you are driving only a few miles everyday, you car is not even getting enough time to warm up to working temperature which will allow you to push it. Go to AMG menu and wait for the temperature numbers to turn white from blue before you start pushing the car.
I have no idea why you are opposed to JB4, but in your requirement, it is the perfect tune for you. Cause you keep it in Map 0 (stock) for daily driving and if you are going for extended drives, only then switch to higher maps. It is still one of the fastest tune for this car when you want to be fast, and when you want to be stock you can be stock. All this you can do in seconds from the mobile app. But either way Renntech is a fantastic tune too.
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Joined: Nov 2016
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
It is not jibberish exactly. It shows the same numbers are the car would have done stock. Nothing changes.
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
Yes, I dont have a 2019....I did not say its your fault as I asked you questions tactfully about how it was removed and the plastic part so I am trying to connect the dots in the hopes in helping you. At no time I wrote a response to point the finger at you. I am happy to see that your car is running fine.
Last edited by munis; Aug 22, 2019 at 09:49 AM.
Senior Member
Joined: Jan 2018
Posts: 296
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From: SF BAY AREA
C400
Your last sentence is correct. Renntech knows what they are doing. Their tunes for Mercedes is the most tried and tested from their own R&D. Other tuners just builds their map on canned tuned from Europe which usually made by a guy a working in sweatpants there. If you do not like piggyback and need to have a full ECU tune, go with DME or Renntech. The number of blown C43s tuned by the other tuners are scary to say the least. Till now it is only JB4, DME, Weistec and Renntech tunes that did not break these cars to date.
Just curious, who has met this guy in Europe in sweatpants? I hear this a lot about all tuners getting canned tunes and making them their own. Is there any evidence on this, where did this arise from?
Most of us here are car enthusiast and not tuners, so do we really know what goes into getting a reputable, safe strong tune?
Not starting a war, but a conversation.
Alex
Member
Joined: Aug 2018
Posts: 212
Likes: 64
From: the Right coast
'19 C43
Just curious, who has met this guy in Europe in sweatpants? I hear this a lot about all tuners getting canned tunes and making them their own. Is there any evidence on this, where did this arise from?
Most of us here are car enthusiast and not tuners, so do we really know what goes into getting a reputable, safe strong tune?
Not starting a war, but a conversation.
Alex
Most of us here are car enthusiast and not tuners, so do we really know what goes into getting a reputable, safe strong tune?
Not starting a war, but a conversation.
Alex
This is the reason you usually see similar problems pop up across multiple tuners for the same platform (i. e. The torque limit codes that all the flash tuners had early on with the C43).
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From: Toronto, ON
2021 Mercedes C63s AMG Coupe
The part about canned tunes is absolutely correct. For European cars (and other makes too), there are three main tune developers that virtually everyone gets their "base" tunes from. These are essentially tune warehouses that sell files. Some tuners take these files and tweak them through in-house testing, others just roll with the canned tunes they bought and slap their name on it. Much of the real r&d and ecu cracking is done by these "warehouses. "
This is the reason you usually see similar problems pop up across multiple tuners for the same platform (i. e. The torque limit codes that all the flash tuners had early on with the C43).
This is the reason you usually see similar problems pop up across multiple tuners for the same platform (i. e. The torque limit codes that all the flash tuners had early on with the C43).
