Still messing about with the srs control unit. I tried a second hand one but merc benz could not over ride the vin number and code mine in. they say it can't be done. has anybody had any dealings with a company called revtronic. They say they can repair the old unit and they did say it had to be the original unit fitted to the car. I don't know whether to go down this route or just bite the bullet and buy a knew one from merc. It galls me to be forced to go to merc but they seem to have closed all the alternatives. regards AA