On my 89 300se ,,, I went to adjust the injection electro hydraulic value and there was only one O ring on it, and the new one I've orderd has two that come with it. I tried to fit the one O ring in the other port or hole, what ever its called and it doesn't fit !!! I've also seen pictures of the new one and the O rings fit into the hydraulic value, on my car it was in the fuel distributor . Can someone please tell me what 's going on and what to do.