Here is the DIY guide for you to make Mercedes-Benz ECU test adapters on your own. Hope it helps.
MB test cable for W202 W208 W210
MB ECU test cable for W203 W463 W639
Mercedes test cable for W204 W207 W212
MB ECU test cable for W212 W246 W166
Mercedes ECU test cable for W215 W220 W230
Mercedes-benz ecu test cable for W221
Mercedes ECU test cable for W221
Mercedes Test cable for W639
MB ESL/ELV test cable for W204 W207 W212
MB Test cable for W906
MB Test cable for W164
Mercedes test cable for W166 W246
Mercedes ecu test cable for W164
If it’s not easy for you to make Mercedes test cables on your own, you can spend some money on it. There are MB ECU test cables available in the market; technicians working for obd2shop.co.uk tested it’s functionality.
Source: http://www.obd2shop.co.uk/wholesale/for-benz-ecu-test-adaptor.html
The test cables above have been tested with
Ktag programmer
Kess v2 master
MB KEY OBD2
NEC57
