I just bought a 1983 300cd and I have convinced myself, after much research on this site and the internet, that the vacuum lines on the car are not currently hooked up right. I am having shifting issues, etc. Some of them are probably not vacuum related but from everything I have read this is the place to start. I can't seem to find anywhere a vacuum diagram that matches the setup in the car. Some aspects of what I have found posted are correct but once the lines hit the vacuum control valve i'm guessing. Can anyone lead me to proper vacuum diagram routing for this model car? I have a 5 way splitter off of the check valve that is confusing me the most. I beleive I know where everything goes off of the seccond orifice, down to the dashpot to the vacuum control valve. to the transmission line. I just need some help.