I have read and read again the explanation of this code and I still can't understand it, can someone explain it as I have this on my ML 350 BlueTEC 2012

Thank you

 

Hello - code P0263 is described as a cylinder number 1 contribution/balance. In essence, this code is stating that the number one cylinder in the firing order is experiencing a fuel-related problem. Take a look at the link below for more info. If you're looking for a Mercedes scan tool where you can read everything in real-time, check out this one: Schwaben Pro Scan Tool for Mercedes Benz

https://www.engine-codes.com/p0263_mercedes-benz.html