Category Archives: ECU programmer

  • -

How to Use KTAG to ReadWrite for Benz ME9.7 ECU

This article OBD2TOOL will show you a step-by-step guide on how to use KAG to read/write Mercedes Benz ME9.7.And try this procedures at your own risk!

Vehicle Information: Mercedes W221 S350
Device: KTAG ECU Programmer

Remove the ME9.7 ECU from vehicle,and open the ECU shell carefully.(for ECU shell removal,you can check this article:How to open EDC16 / EDC17 / MED17 )

ECU PCB show as picture show:


Step 2:
Connect then cable 14P600KT02 to the connector of ECU.

Refer to below pin out diagram:

Red color: Pin 15, 16: +12V

Black: Pin 2: GND


Apply solder paste on the red area in ECU as following picture:

Solder cable to ECU:


Note:Here i you want to make the procedures simplify,you can choose ME9.7 ECU Renew Cable.No need to disassemble the ECU and soldering cable connectors.It can reduce operational risk of ECU damaged.



Open KTAG software.

Then I Choose “Mercedes” “S (W221)” and “S350 3500 V6…BOSCH ME9.7”.


Choose plug-in “P102”.


I clicked “Read” and wait for a while.

Then Save the bin file.

Finally, i successfully used K-TAG Auto ECU Programmer to read Mercedes W221 ME9.7 ECU !


Then write procedures is same as reading procedures.And before you write a new ECU data file back into ECU,you would better make a backup.

  • -

The different between Kess V2 V5.017 and Ktag V7.020 ECU Programmer Master

kess v2 ktag

KESS V2 V5.017 and KTAG V7.020 both are universal Petrol & Diesel car/truck/tractor/motorcycle ECU Chip Tuning tools.
But KESS V2 Master works better for more 12V gasoline cars, K TAG V7.020 works better for more 12V Diesel Cars and 24V trucks/tractors/motorcycles.

The Vehicle Coverage for these 2 tools are different . KESS V5.017 can not work well For Toyota Denso 76F00XX ECU Protocol, But KTAG V7.020 can work For Toyota Denso 76F00XX very well ! Of course there is also some ECU protocols that KESS can work but ktag can not.

So you need to get get both kess v5.017 and ktag v7.020 together to cover the most vehicles and ecu protocols

KESS V5.017 can read and write ECU via OBD2 Cable Directly For Some Vehicles, do not need to open ECU, Easy To Operate ! But For Some Vehicles, It needs to disassemble ECU then can do ECU programming .

K-TAG V7.020 works in this way , K-TAG 7.020 read and write ECU via TRICORE or BDM Or Other Mode with special cable, But the software will guide you how to operate !

the ECU Connection Way for these 2 tools are different.

When you are not sure your vehicles ecu can be read and write via OBD2 Cable or must be disassemble, then it is better to get both KESS and KTAG.

obd2tool website offer Kess V2 V5.017 Plus Ktag V7.020 ECU Programmer with good price and best quality. It is the Master Version No Tokens Limited! If you are looking for ECU programming tool, Please link to