i have been looking all over the engine campartment for the resistor that retards engine spark in my 84 190E. can't find it. i have a manual and it shows it under the aircleaner by the valve cover. still no luck. have looked behind battery and by the brake resevoir. all the same results. anyone have any suggestions where i can find this resistor on this car. 1984 190E 2.3 8v

thanks a bunch