On a 1983 300SD how does one loosen the 10mm bolt to make the adjustment? There isn't room to get a wrench or a socket in ther. That adjustment screw appears to be copper. Whatever it is it's a soft material. I was trying to adjust mine and I severed off the top part of the bolt from the force of the screwdriver. Due to the fact that I couldn't (didn't) loosen the 10mm bolt.
So I plugged off the vacuum line to and from the ALDA. It doesn't seem to have made any difference performance wise.
Is plugging off the vacuum lines not the same as removing the ALDA? I was hoping for some power on the hills but no dice.