[gcgj15]

I have a cheap 38 pin scan tool bought on eBay but it will only communicate with some of the ports. other ones it just won’t blink not even once so I assume it’s not communicating. too bad because exactly on the port 30 which is for the SRS system it won’t communicate and I also have the SRS light on after replacing the steering wheel and now need reset. :/

 

[gcgj15]

I have a 1998 S320 with SRS light on too. Have you found a solution to diagnose and/or reset the code yet? I've purchased 2 OBDII code reader/scanner both claiming that they work on SRS on BENZ, but neither was successful to connect to my car.

I think you only can reset using Star diagnosis c3 via 38pin port. But in some cars if you’re unlucky even with the star diagnosis it will fail to communicate with the Srs airbag module and the light can’t be reset then you need to find out why. Easiest solution would be find someone or some shop which have the Mb Star Diagnosis c3 or buy a Chinese copy online but it’s a bit expensive. In my 97’ S320 for now I simply removed the Srs bulb until I find someone who has the Star Diagnosis.

 

[gcgj15]

If its not communicating with SRS its the module and and not the Star. I had this issue with a 420, and after many after hours hours, my indy found that the module lacked ground, he rewired the ground in the harness and all was well. So if Star won't rest the light, you have other issues, and likely a safety issue as the bag may not deploy.

you have said you can’t remember how he did it because it was 5 years ago anyways thanks for explain now I will try to check that module ground.