The ECU Programming Tool latest Ksuite 2.25 is verified to work perfectly with Ktag firmware 7.020, no issues of ECU read/write. Have been tested successfully on an ECU ME 9.7 from Mercedes-Benz W203 2003.

The test… here you go.

Part 1: Ktag Mercedes ME 9.7 wiring diagram

Part 2: read Mercedes ME 9.7

Part 3: write Mercedes ME 9.7

In detail…

Part 1: K TAG Mercedes ME 9.7 wiring diagram
  
    

Part 2: Ktag fw 7.020 sw 2.25 reads Mercedes ME 9.7

Success!

Part 3: Ktag fw 7.020 sw 2.25 writes Mercedes ME 9.7

  
Success!