Hi, New member with a new thread. Working on my 95 300d I've chased down all the vacuum control issues which lead me to a short in the electrical jack at the resonance cross over valves. I've noticed the resonance and pressure flaps never seem to operate and now I'm thinking the EGR/Resonance intake manifold control module may be fried (Probably by the aforementioned short.) My software doesn't disclose the location of the Control Module so that's my first question. Secondly, how to check it out. Do the control flaps oscillate like an idle air contol valve (in a gas car, not my diesel.) Thirdly, if I need a new control module where do I get one on the cheap? Thanks, Jack