I have a 1987 300E and the timing is a bit advanced.
I world like to back it off a bit.
I heard there is a trim socket with different value resistors?
Where is this located?
On the drivers side inner fender where the ignition parts are mounted I found a round plastic cap. I unscrewed it and there were 9 metal contacts, numbered 1-9, but I think this is for diagnostics.
Could someone explain where this adjustment socket is and how I can find it?
I did see a small rectangular box also in the inner fender with a think wire coming out if it. I tried to remove the cover of the box but it didn't seem to want to come off.
Thanks