Hello everyone,
I'm trying to add an on-board computer/trip computer to my Mercedes w124 2.6 1988. I have a problem to find the L/100 consumption signal. I know that control unit receives the signal for the fuel consumption from the ECU via the trip computer connector (located in the fusebox). In the facelift version, this cable is already connected at the factory, it's located in the ECU (55-pin plug version) pin no. 12. I'm also checked some wiring diagrams and I saw that this pin no.12 is empty(in the normal version). In my version (ECU 25-pin plug) I don't have this cable. Where can I get this signal for the fuel consumption? Any ideas?


Greetings,