Checksum error ml270cdi 2004

[dexbethename]

Hi I have a Mercedes ml270cdi as my tow truck but giving lots of black smoke with no codes or boost leaks etc so my thoughts are to do away with egr valve, I have used software to delete it off my ecu file and sorted checksum with winols but when I go to write it on the car it comes up with a checksum error, never had this before and not sure what to do as winols says checksum is ok, anyone had this issue or know how to resolve it?

[Johnsy1998]

what reading/writing tool are you using?

[igor6997]

if you are using a clone device you may have a problem

[dexbethename]

Yes forgot to add it’s a kess v2 clone, never had an issue with my cars yet tho, unless it’s because it was read a while ago with a mpps clone

[morgano]

As general rule i would not mix files from different interfaces without being 100% sure they are compatible. point 1
What ksuite are you using with your chinese kess? point 2