srs light is on i know this efects fuel pres. When car starts idel is not increased.

Your problem is probably the OVP Relay. If you don't know where the OVP relay is located, it's behind the battery. You have to remove the black plastic cover and you will see it. It has either 1 or 2 10 amp fuses mounted on top. Check the fuse first, you might be lucky and just have a blown fuse. If you do remove the relay, the socket that it plugs into isn't secured in place, so you'll have to hold it when you plug the OVP relay back in.

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

I Thought that was srs relay.thanks for wiring diagram.10amp fuse was blown. Had replaced it,still same thing.Car had eyeball shot. Air bag,srs had deployed .did not hurt frame. Have worked on 100's of 50's-60's.learning the new ones. Have both kinds 1fuse and 2fuses [came out of 300]. Car had single fuse. have extra [it might be bad will check with wiring diagram.] i tryed it before same thing.he thanks for info.