Hey guys need some serious help, i must apologise because this is going to be a long post but ill try and be as direct as i can.

I purchased a 2016 c220d w205 9 speed auto from auction, only 60k on clock looked clean and i pad £6k the car starts first time and drive perfect, no smoke, no noise. no eml

here's the issue though:

• i noticed it seemed low on power,
• the kickdown didnt work
• and it wont rev about 2700 rpm.

The adblue, DPF and EGR have all been mapped out before i purchased it, unfortunately who ever mapped it also deleted the error tables from the ECU so i have no codes to read and find out whats causing the limp mode.
so heres what ive tried so far

• i have put an endoscope into the dpf, its 100% been gutted,
• I have hooked up a smoke machine to test for boost leaks, there are none,
• ive done a full oil and filter service.
• i have tried driving with the MAP and MAF sensors unplugged, it makes no difference

I have a Launch x431 pro and although it wont show any error codes due to the map i can still see the live data values, the kickdown switch physically works and registers on scanner and all other values seem to be in specified range so the only thing i can put it down to is a bad remap, i have taken it to a well regarded mapper (junction 28 remaps) but he refused to look at it because he said some its some one else work and the w205 are difficult cars to begin with, i have also spoken to an intendant Mercedes specialist in the hope he can restore it to stock software but he's refusing to help because the DPF has been gutted and he says once its restored it wont even run.

So ive had an idea, i have been looking on ebay and i can replace the whole ecu set for less than £300, i realise ill have to change everything, even the clock cluster but when i was researching the job Gemini is saying although the car will run and drive, the radio, rear parking camera and front radar sensors wont work, does any know if this is true?

Does any one know any one in the mansfield,/Nottinghamshire area that can restore my ecu back to stock?

is the Merc specialist right in what hes saying about retwoing it without replacing DPF will make it not start?

Please guys any other ideas or advise before i go all nuclear and replace the whole ecu modules?

oh one last thing that stood out on my scanner, i saw this in one of the live feeds if it helps anyone "Torque limitation by component or function value normal/mode smoke limit"

agian sorry for the long post

Rich

 

Best and cheapest, load the original SW back to the ECU for diagnosis reasons. Of course, car may run even worse with the original SW and without DPF, sensors, etc, but it will start.
You can do that with any Win11 laptop and a 15$ Openport interface.

Car received all that Off's because the previos owner did not find a technician to repair the incipient defective component. They do Off for no reason, as the initial defect remain not repaired.

So, after origianl SW in place, diag the car with any Xentry system if you are ready to understand the difference between reading Fault Codes and doing diag with step by step written in plain english and explained in full repair what you want/can repair, or use a tech that can do that.

For the rest, you can use any tuner to do any nonsense Off based on original file.

 

Hi mate, thankyou for responding, its much appreciated,

what you suggested above is exactly what im hoping to achieve, return the car to stock, diagnose any faults, repair them and then when everything is fixed find a reputable mapper to sort the DPF and AdBlue issues out.

You said i can flash the ECU back to stock myself using a £15 interface? i was under the impression to return the ECU to stock i would need access to Mercedes servers to down loan the files?

I have several highend laptops capable of running most software, if you could just give me a few pointers in the right direction then im more than happy to try doing it myself, ideally if you know the type of interface i would need to hook up the laptop that would actually work ill get one ordered tonight, and as for the flashing side of things im guessing from what you have said i dont need a Mercedes account?

Thanks for your help mate

 

No, no need any online system. More likely an legit online system will refuse to go further due to the manipulation

 

brilliant I’m going to order an openport 2 interface from Amazon now hopefully will be here in the morning

i know site rules probably prevent you from saying where I can find the files I need for the flashing but I’m prettty sure I know where I can get those from so can you recommend the best software to use to flash the ecu?

hopefully I’ll be able to get the laptop and software setup tonight and the cable delivered tomorrow!

happy days, thank you so much

 

Start with door ECU or something more easy...as no tool or software will do the job for you. After learning you could use any tool to do the job