Hello! This is my first time on this forum, but I plan to stick around. I recently bought a 1969 w115 220d in semirunning state. I'm located in the bay area, CA. Right now its injector nailing real bad. I'm going to try diesel purge, but I'm sure the injectors will need a rebuild. That leads me into my question. I searched the internet high and low and I cant find any reference to the kind of injectors that are in this car. I'm confused by the hard return lines on the injectors, and that it appears they're threaded into the block with thread tape. Any wisdom?