Reversing HP Tuners ECU update on MED17.7.3 '15 CLS63 AMG

[OkEvolution]

Has anyone found a successful way to reverse the HPT program update or restore the original ECU program? I have a Eurocharged Stg. 2 tune and was wanting a good datalogger to use when I was having a misfire-like issue under any boost,, sometimes it ran hard then just felt like 2 cylinders cutting out most of the time.

It was too late when I flash the OE tune and never had the issue again and realized it may have been a load/boost/TQ cut and EC could send me another file. But that's no longer an option. My local dealership won't touch reflash the ECU, EC is unable to help, and any ECU clone and repair shop has no idea needs to be done.

I'm really considering dropping a grand for an ECU set removed from 1 vehicle with the door/trunk lock modules, ignition, keys and everything ready to swap and if that's all I that's needed, I'll have to go for it and then clone that on a spare I bought. I wish I knew what a mess it was and clone one before hand.

Has anyone found an easier way to accomplish this? Ill try to post pics of what the MyGenius shows when trying to load the EC tune.

[Joshinator99]

If memory serves, if the dealer (or anyone) flashes in an OEM tune after an aftermarket tune is already installed, you have to ship the ECM off to be unlocked again. I have an OE Tuning Stage 1 in my ML63 AMG, and can use HPT to datalog.

You can try reaching out to eightysixtuned or 63 Motorsports for help as I believe they use HPT for their tuning. Although they’re M156 specialists so maybe not lol.

If that’s a dead end maybe try OE Tuning and see if they can help. Can probably repurpose your My Genius since that’s what OET uses anyway.

[chevota]

I assume your Eurocharge was loaded via MyGenius? Then you loaded the HP Patch and now MyGenius won't work?

If I remember correctly, after applying the HP Patch, MyGenius will allow me to load the original back on but it will not allow a tune stored in MyGenius to be used again. It's been a couple years but I'm pretty sure that was the deal?

I don't know why the dealer or anyone else won't load the stock tune back on. My dealer offered it to me once for an hour. I'm pretty sure the oem tune can be loaded remotely as well. I'd assume that wipes HP Patch but I'm not certain. I don't know wth the patch does or where it's hiding.

[Joshinator99]

I assume your Eurocharge was loaded via MyGenius? Then you loaded the HP Patch and now MyGenius won't work?

If I remember correctly, after applying the HP Patch, MyGenius will allow me to load the original back on but it will not allow a tune stored in MyGenius to be used again. It's been a couple years but I'm pretty sure that was the deal?

I don't know why the dealer or anyone else won't load the stock tune back on. My dealer offered it to me once for an hour. I'm pretty sure the oem tune can be loaded remotely as well. I'd assume that wipes HP Patch but I'm not certain. I don't know wth the patch does or where it's hiding.

No…I didn’t say that at all lol…

[chevota]

I asked because I couldnt really understand what you were saying

[outlaw_50]

Its not clear what yo are asking to do

[Kendalld13]

I had this exact thing happen. The patch changes your serial number on the ecu to all zeros and your MyGenius is looking for that serial number which is why it won?t connect. The only thing I have found after looking for several months is to have a virgin ecu and have it flashed.

[Joshinator99]

I had this exact thing happen. The patch changes your serial number on the ecu to all zeros and your MyGenius is looking for that serial number which is why it won?t connect. The only thing I have found after looking for several months is to have a virgin ecu and have it flashed.

So this happened when you tried to use HPT to SCAN your already-tuned ECU? Or were you trying to EDIT your already-tuned ECU? Just trying to understand.

[OkEvolution]

Sorry, I was trying to find a way to reverse the update that HP Tuners put on the ECU. The update will not allow me to write the EC tune to the ECU with MyGenuis. It's been nearly a year of asking various places if they can do a hard reset on the ECU or completely restore it to factory settings.

I'm currently sending an email to ECU Pro for some help. Since my local dealer won't mess with reflashed/tuned ECUs, I thought about asking if they had some update for the COMAND system since I've been having repetitive issues requiring soft resets every time I start the car and see if they will reset the ECU if I mention some power loss or lag type of problem.

[Joshinator99]

So this happened when you tried to use HPT to SCAN your already-tuned ECU? Or were you trying to EDIT your already-tuned ECU? Just trying to understand.

Sorry, I was trying to find a way to reverse the update that HP Tuners put on the ECU. The update will not allow me to write the EC tune to the ECU with MyGenuis. It's been nearly a year of asking various places if they can do a hard reset on the ECU or completely restore it to factory settings.

I'm currently sending an email to ECU Pro for some help. Since my local dealer won't mess with reflashed/tuned ECUs, I thought about asking if they had some update for the COMAND system since I've been having repetitive issues requiring soft resets every time I start the car and see if they will reset the ECU if I mention some power loss or lag type of problem.

OK, can you please answer my original question? We’re you using HPT to just SCAN/DATA LOG your MyGenius-tuned ECU? Or did you use HPT to WRITE your MyGenius-tuned ECU? It’s a significant difference so want to make sure I’m on the same page.

[chevota]

It's fun trying to get answers outta this place huh? While I can't give you a 100% sure answer, I'll give you what I can:
HP claims it'll read data via the Scanner without the patch, which I believe I read on the main website when I bought it. It's just reading the same crap any other device is reading so I don't see why not.
The Patch is to allow HP to read/write the tune. Why it needs that I don't know, but it does.

I'm somewhat certain I've used the Scanner without the patch for two reasons: One is I've loaded the oem file (patch free version) back on a few times to see how it runs, and I use HP Scanner every time I drive it. So while I don't have a specific memory of not re-appying the patch, I'm pretty certain I didn't just to use the Scanner. I do recall trying to load a tune and getting blocked because there wasn't a patch, which caught me off guard for a moment. That tells me I drove it using the Scanner, and later, forgetting out the patch, tried to load a tune.
I'm also somewhat certain I used the scanner before I applied the patch the very first time. I don't specifically recall that either, but that's how I normally do things because I'm too curious not to.
So while I'm not 100% certain, I'm pretty certain, based on the above, the Scanner works without the patch.

As for OEM vs a MyGenius tune; I've applied the HP patch to both, read both, modified both and wrote them back.
So oem, patch, read/mod/write.
Or with MyGenius tune on it, patch, read/mod/write.
It had two tunes on it so again with the other one. Each time I used MyGenius again I had to wipe the patch by writing the clone copy back on. The MyGenius exists to prevent pirating, and it seems the HP patch triggers that.

Per outlaw, all the stuff my tuner (OE) did is visible in HP. So after I'm done modding either version, the original OE stuff is gone. I don't notice any difference either so I assume outlaw is correct. He would know because he can see all the crap we can't by using WinOLS. One day I'll try that program too, maybe, but WinOLS appears to be substantially more complicated. Like waaaay more stuff and nothing is labeled. I can feel a headache coming on just thinking about it. Now if I had a couple high end tunes to compare to stock, that would basically be like a Rosetta Stone.

Another clue that may or may not help: BenzNinja loaded a newer oem copy of the oem tune to my ecu. The HP patch was still there! In my limited understanding, there are two sections of data on the ECU. The tune itself, and the part that makes it work on your exact car. The security section I guess. I assume the HP patch is on the security side? Or maybe there's more to it, I dunno... I spoze I could try writing just the security part, if I can, and see what happens.

[Joshinator99]

It's fun trying to get answers outta this place huh? While I can't give you a 100% sure answer, I'll give you what I can:
HP claims it'll read data via the Scanner without the patch, which I believe I read on the main website when I bought it. It's just reading the same crap any other device is reading so I don't see why not.
The Patch is to allow HP to read/write the tune. Why it needs that I don't know, but it does.

I'm somewhat certain I've used the Scanner without the patch for two reasons: One is I've loaded the oem file (patch free version) back on a few times to see how it runs, and I use HP Scanner every time I drive it. So while I don't have a specific memory of not re-appying the patch, I'm pretty certain I didn't just to use the Scanner. I do recall trying to load a tune and getting blocked because there wasn't a patch, which caught me off guard for a moment. That tells me I drove it using the Scanner, and later, forgetting out the patch, tried to load a tune.
I'm also somewhat certain I used the scanner before I applied the patch the very first time. I don't specifically recall that either, but that's how I normally do things because I'm too curious not to.
So while I'm not 100% certain, I'm pretty certain, based on the above, the Scanner works without the patch.

As for OEM vs a MyGenius tune; I've applied the HP patch to both, read both, modified both and wrote them back.
So oem, patch, read/mod/write.
Or with MyGenius tune on it, patch, read/mod/write.
It had two tunes on it so again with the other one. Each time I used MyGenius again I had to wipe the patch by writing the clone copy back on. The MyGenius exists to prevent pirating, and it seems the HP patch triggers that.

Per outlaw, all the stuff my tuner (OE) did is visible in HP. So after I'm done modding either version, the original OE stuff is gone. I don't notice any difference either so I assume outlaw is correct. He would know because he can see all the crap we can't by using WinOLS. One day I'll try that program too, maybe, but WinOLS appears to be substantially more complicated. Like waaaay more stuff and nothing is labeled. I can feel a headache coming on just thinking about it. Now if I had a couple high end tunes to compare to stock, that would basically be like a Rosetta Stone.

Another clue that may or may not help: BenzNinja loaded a newer oem copy of the oem tune to my ecu. The HP patch was still there! In my limited understanding, there are two sections of data on the ECU. The tune itself, and the part that makes it work on your exact car. The security section I guess. I assume the HP patch is on the security side? Or maybe there's more to it, I dunno... I spoze I could try writing just the security part, if I can, and see what happens.

Wow, yeah that’s crazy lol! Reason I ask is I have an OE Tuning (MyGenius) tune for my ML63 AMG. OE says I can use HPT to data log if I want, and they’re happy to review my logs. But I don’t want to use HPT if I risk screwing up my ECU.

[chevota]

It won't hurt to try using the Scanner since it just reads. The patch to use the Editor is where people get in trouble. Bricking the ECU applying the patch is one, but I also wanted a copy of my ECU without the patch, just in case.
Last year a guy had massive problems after trying to apply the patch. I forget the details but what a mess. Then this new member CL63_2NV is getting F'd with no lube as we speak.
Uggg... As much as a pita HP is, and all the complaining I do, I have a easy compared to some.

I can't recall if I mentioned if before, but have you asked HP if there is an Patch undo? Seems to me if made the patch, they make an undo/uninstall. I would...

[chevota]

OkEvolution; I suppose you could check out the forum at MHH Auto. Lots of people in there with common mistakes, and lots of people who know a hella more than I do about this stuff, so maybe someone has an answer.
If all fails I suppose BenzNinja or outlaw_50 could load the original oem file back on to see if that saves it? I remember on the OE website there was mention of what happens when the dealer updates your ecu, and I think it meant OE had to adjust the tune to work again, for $100 or so.
I wish HPT would tell us wth that patch does, how it affects things like this, and if it can be removed.

Joshinator; just put the oem tune on it via MyGenius, then copy/save that via KESS or KTAG and you're golden. You can always go back to that and start over, no matter what happens.
You could also use KESS to copy the tunes if you want, but all you really need is that oem file. I've never loaded an OE tune back on since the day I got HP, with the exception of loading it so I could copy with HP to see what they did in there.
I made instructions on buying and using KESS, if anyone wants. It's like $60 and pretty easy to use. At least it was on my ECU, but other models can differ in various ways. I assume it's a MED7.7.something? If so here's the instructions from KESS: https://transferxl.com/download/00vK8TC1c2GqHw
Fyi the program said I had to take the ECU board off the heat sink side, which is glued on and risky to remove. I tried out of curiosity, but I felt like it would break the board. I didn't need to do that at all, I only needed to access the easy side. I haven't looked at the other versions of ECU's but I assume all MED7.7.x are in there.