I currently have a 1973 250 CE in for repairs it has a W114 engine and I am unable to find any service manuals for this particular car. It has a Bosch Electronic Fuel Injection System as standard and I can find no reference to this EFI system anywhere.

When it arrived I was told that the battery was faulty and as this is a show car that was not hard to believe. I could then start the car but after fitting a new battery it got worse still until I'm currently at the stage of only being able to keep the motor running for a few seconds.

I'm sure it is an electrical problem and something to do with a relay for the fuel system but as I can find no technical details at all about this particular setup I do not know what relays do what. To make matters worse I am unable to locate any mechanics who have detailed knowledge of this type of setup. The general layout of the car is normal but the EFI system is totally different to the latter models.

Can anyone advise me where I can obtain any technical data on this car or a service manual that covers the fitted Bosch EFI system and a wiring Digram? Even the actual model of the Bosh Fuel Injection system would be of help as I could then get the proper Bosch manual.

Of course all the normal channels for service manuals insist that this car should have Carbs or Mechanical Fuel Injection but Mercedes insists that it is as original with the EFI but are unable to tell me the model of the EFI system.

Col