I have a 1983 300SD, is there any way I can check the boost pressure? I have checked the boost line, and it is clear.
I also cjecked the operation of the wastegate accuator, and with about ten lbs. of force it smoothly pushed in & out.
It seems that with the windows down, and the AC blower on low I can hear a slight turbo sound. Nothing to write home about.
I would like to check the boost pressure though.