[Vlado ATM Chiptuning]

if your kess is clone tool- connect it on car on OBD, than choose car model type, example golf 6 1.6 105 hp pcr 2.1 , read ecu id, and if you see notice there ECU status - LOCKED, go to read ecu, u will read it sucessfuly, than into engine space under windshield wipers remove ecu from the car, open it, read eeprom, than unlock ecu on desk (follow kess instruction) after u unlock ecu , trow it back on car, than u will be able to write modified file.

IF you are without soldering experience, and if you are not professional think about it will you work on it.
BE aware that always is possible to screw something on soldering and opening ecu.

WOrk slow think a lot.