190E 2.3 16v, 1988 - I have the Mercedes workshop manual for the wiring diagrams for the W124,201 but can't find a diagram for the 9 pin OVP plug on the 16V. Not sure if the Diakom.ru diags (engine compartment cont. grids 8-11)are accurate as I am missing a red wire from pin 4 and only 8 of the 9 shown. Any help appreciated.