Originally Posted by elkman

Search for injector cleaning threads. There is much debate on this. There is speculation that build up in the IP may be sent down stream causing negative affect. I took out my injectors and cleaned them this weekend. After visualizing them and soaking them in berryman carb cleaner for two days I can tell you there would be no way any injecotr cleaner could clean even a fraction of what I took off. If you clean yours do no use any metal on them. Use a green dish srub pad, This was suggested by a local 40 year mercedes mechanic. For 100 bucks, you can buy new monarch injectors from mercedes source, (probably not a bad idea). Also thoroughly clean your pre chamber and ream your glow plugs while your in there, also you can visually check all plugs while injectors are out.