PMeng

I have searched a bit and did a bunch of research and seems to be that the c300 and c350 for 2013 up (mine being a 2014 c300 4 matic) all have the same 3.5L engine yet differing power levels. In canada I believe the c350 is also a 4matic where we do not get that in the US. If that is the case why is it an ecu can not be swapped or flashed even with just oem c350 tuning?

Is it an immobilizer issue? Can that not be adapter to your car and/or key?

Are the ecus in some other way locked that you couldnt buy a c350 4martic ecu and plug and play?

Maybe a dealer could flash it to a different file?

Seems the parts are identical engine wise so there seems to be no hardware difference causing the gains?

I am a little green to then newer MB cars so any education and dialogue would be appreciated.

97 GSX 97

Nobody can give you a true reason, but you will never reach the 302hp of a C350. Yes it is the same motor, but I have looked extensively into this. There are a few ECU tunes out there (OETuning, Eurocharged, etc etc). They all offer around 25-35whp....but there are no dyno charts to prove their numbers.

If you want the car to feel faster look into a Sprintbooster. A Sprintbooster takes the electrical signal from your electronic gas pedal and alters it to open the throttle body slightly wider than the actual pressure you are applying to the gas pedal. It gets rid of the low end hesitation, and generally just makes the car feel faster while gaining no horsepower.

Hope this helps, but performance wise you have to fork out $900-$1,200 for 25-35whp...

PMeng

Thanks for the reply. But seeing it is the same engine I can not fathom why one could not transfer the c350 tune to the c300 ecu or adapt the c350 ecu to use on a c300 as its all in the software. I understand many may not have played with this or may not want to disclose how they did it if they did. Im just unfamiliar with mercedes stuff unfortunately but if I dont gain some knowledge here I will start digging on my own.

The sprint boosters are a band aid. Tuners should be able to provide direct one to one pedal movement via tuning, which would basically give you the same thing the correct way. The aftermarket box is a bandaid for the stepped and acceleration of the pedal based software to dictate throttle opening. Have dealt with this in the audi world for years.

PMeng

Maybe I am asking the wrong question. What if I needed an ecu from another car and I wanted to buy used and have it work in my car? What would I do to make that happen? Is there a procedure, adaptation, immobilizer fix, etc I can do to try that? Nothinbg is actually wrong with my ecu but I dont see why I couldnt maybe trick teh car into accepting a c350 ecu or something along those lines. Im not opposed to buying software etc.

getmercd

You cannot simply swap ECUs lol that is not how that works. ECUs are programmed to the keys at the dealer and are car specific. As far as "swapping factory tunes", that is also not how that works. The motor may be the same size, but they are not identical. There are subtle differences that give the C350 that extra power. Mercedes would not have two different models if you could just take the tune off the more expensive one and put it on the cheaper one haha. If you are looking for added power, I would highly suggest a software upgrade. I know my preferred tuner is having a sale right now, so if money is tight, check out AMR Performance. Just my two cents, good luck!

PMeng

I understand that it wouldn't be a plug an play situation. But typically ecus, at least in other model cars, can be adapted to cars. As can keys, and imobilizers etc. After all ecu's fail and keys get lost. Unfortunately I am not knowledgeable on the procedure for mercedes vehicles enough to know the process to attempt to adapt it. From the research I have been able to do I see no difference in part numbers for the c350 engine parts to the c300 parts. So I am assuming you are guessing when you make the statement that there are subtle differences besides software based tuning. If I am wrong please clarify. Personally I think that would be a brilliant way of charging a large markup on a vehicle with virtually no added expense to do so. More profit sounds like a perfect motivator to do this form mercedes.

xjaymzzx

All kinds of wrong in this thread. Follow @nota_amg cuz I don't go on here much

Just204

Waiting for this to turn into another engine tune thread. I find it weird how several people on them said they would dyno their car and tell everyone but then disappear...

PMeng

I dont have instagram. All I saw when I googled your name was a bunch of pictures? Anything informative?

Jimmyak1975

Hii, I have a c300 2013 4matic (engine 276) and I recently downloaded the C350 ecu file (2013) onto my c300 ecu file (also 2013) using FLASH mode. It had noticeable improved performance. Then I did a C350 tune from dyno-chiptuningfiles.com (sent them original file online and they resend the tuned one within 1hr at 120 euro cost). I did a dyno test after that and got a 310 bhp!!! Amazing result. I can share all details, graphs of dyno or even the files you need to upgrade to c350 + tune. Of course free of charge. Hope you enjoy the upgrade!

So I shared with you the original c350 2013 file, and the stage 1 tuned c350 file to get around 310bhp after both upgrades to your ECU.

If you need more info or the you can not download the 2 files (4Mb each), I will be happy to share them via email. My mail is: Jamil.ak@hotmail.com

To note that I tried the car and it works perfectly well



It shows the whopping 310 bhp! What a difference in driving...

JettaRed

iTrader: (1)

How exactly did you upload the files to your ECU?

JettaRed

iTrader: (1)

dyno-chiptunefiles.com is not an active website. It is a bogus website. What are you promoting?

Jimmyak1975

You need a tool that can read/write not just a diagnostic tool. The mechanic removed my Ecu and linked it to the tool+laptop. He told me he used FLASH mode. The file is around 4MB.

Now for the C350 file, you need to get it from a donor car, and regarding the tune, as I told you, I sent online the original and received the Tuned one. The site is dyno-chiptuningfiles.com.

Jimmyak1975

Sorry, it is dyno-chiptuningfiles.com

It is not bogus and the engineers followed up with me for a couple of days... And the tuned file I received made a BIG difference to the car's peformance. I am not promoting any site, just sharing my good experience which I hope can help others who couldnt get an cheap good upgrade
​​​

JettaRed

iTrader: (1)

Then, my apologies. Too often I see people getting scammed with bogus emails, text messages, and phone calls. If something seems awry (such as a non-existent website), I become very suspicious.

Again, I'm sorry for becoming confrontational about your posting.

JettaRed

iTrader: (1)

There are tuners that will rent or sell you programming tools (flash-loaders) such as MyGenius or Alientech Powergate when you buy their tune. As you described, you download a copy of the factory tune and email or upload it to them. They send you a file back that you install on the device and use it to flash your specific car's ECU.

Jimmyak1975

No worries, and you are right regarding the so many bogus websites.. Yes, I took a risk since it was my first contact with them but it paid off eventually and they turned out to be legit with good customer service.

Slowc300

hi!, I have a 2013 c300 sport, I was just wondering if you did anything to the exhaust or intake and if you have a picture of the stock whp numbers, thank you!

Jimmyak1975

Hi, I did not touch the exhaust, just an ecu tune

SlyFiset

Did anyone ever tried these 2 Flash files on their m276 c300 ?

I am curious to know as I am about to try it out

Slowc300

sadly I never got around to it, decided just to save up for a c63 for next summer.

others have really good gains on these with the tunes though.