How to Replace and Program Mercedes ME 9.7 ECU with the LOWEST price?

Question: How do you replace and program Mercedes ME 9.7? Possible to do it within 300 usd?

Answer: There are usually 3 optional ways. And the cheapest is 299 usd for all.



Optional solutions:

There are 3 solutions available if you have a ME 9.7 ECU damaged!

 Method ECU Programmer Adapter Cost

(the dealership)

Original ME 9.7 ecu from the Mercedes dealership Original SD connect C4 for online programming No


10,000+ usd
Popular Functional ME 9.7 ecu on the web SD connect C4 good china clone for online programming No 600 usd around
Cheapest Functional ME 9.7 ecu on the web Ktag china clone or other programmers to read and write data Renew cable 299 usd


In detail…


  1. expensive, the way same as the dealership does!

You can buy the original ECU ME9.7 and SD connect C4 emulator from the dealership.

Replace it and do online programming with C4


  1. popular among Mercedes owners

It’s popular because SD connect c4 is TOP 1 Mercedes diagnostic and programming tool.

You can buy a decent ME 9.7 ECU on the web. (Refer to the tip below to get a good ECU)

Replace it and do online programming with C4


  1. cheapest and tested successfully

The cheapest way is: Ktag + decent ECU + ME 9.7 renew cable!



the full kit with the best price: 299 usd


tip: you can see a lot of ECUs for sale online, but pls do buy an ECU that confirms to work good. here’s the functional ME9.7 tested by many Mercedes owners successfully:


mercedes-me9-7-me 9-7-ecu-ecm-engine-computer-03

mercedes-me9-7-me 9-7-ecu-ecm-engine-computer-02



the ecu can be used for any Mercedes equipped with ME 9.7:

Series Models Chassis NO Engine Model(ME9.7)
C Series C230 203.052 272.920
C Series C280 203.054 272.940
C Series C280 204.054 272.947
E Series E350 211.056 272.964
E Series E280 211.054 272.943
E Series E300 12.054 272.952
E Series E350 207.356 272.961
CLK cars CLK280 209.354 272.940
CLK cars CLK350 209.356 272.960
CLS sports cars CLS350 219.356 272.964
CLS sports cars CLS300 219.354 272.943
SLK sports cars SLK280 171.454 272.942
SLK sports cars SLK350 171.456 272.963
S Series S350 221.56 272.965
S Series S4100 221.195 272.974
M Series ML350 164.186 272.967
M Series ML300 164.182 272.945
R Series R350 251.165 272.967
R Series R300 251.154 272.945
GLK cars GLK300 204.981 272.984
GLK cars GLK350 204.987 272.971


The cheapest way:

When you get the original ECU data, just use this renew cable to connect to Ktag to write to Mercedes ME9.7 ME 9.7 ECU.  With this cable, you won’t need to open the ECU to write data anymore.


You need:

Ktag/KTM100 (to help write data)

Mercedes ME 9.7 ECU (for replacement)

Renew cable (to write data into the new ECU)



Note: The ME9.7 renew cable CANNOT be connected to original ME9.7 ECU computer. It is confirmed to work with Me 9.7 ecu from without issue.



How to replace and program Me 9.7 with Ktag:

Step 1: disassemble the ECU from car

Step 2: read and save original ECU data with Ktag programmer

















Step 3: connect the new ECU and Ktag with the ME9.7 renew cable

Step 4: write the data into the new ECU with K-tag






Important: Ktag – Which version?

There are many Ktag versions incl. the original and EU/China clones.

Here, it’s possible to have a good success if you have a decent China clone.

This is the latest Ktag (firmware 7.020 software 2.25, red pcb inside)that’s confirmed to work perfectly with Me9.7 read and write:

The test on W203 Me9.7:


Ktag 7.020 ksuite 2.25 can read and write ME 9.7 without issues!


299 usd make it.



There are still some other ways to swap/program Mercedes ME9.7 engine computers. for example

How to Clone and Program Mercedes ME9.7 ECU with Autel IM608