You seemed very helpfull on 1987 560. Can you help me on a 1973 450se euro? This is a 116 body I do not have power to the fuel pump relay, I can not locate the main fuel relay, the pump relay is in the fuse box left inner fender, I have tried to trace the red wire from battery to the main relay however I lose the wire when it enters the firewall.
any help is appreciated.