Date registered: Aug 2009
Vehicle: '72 250C, '74 280C, '85 500SEL, '81 300CD.
Location: Tucson, Az.
Mentioned: 3 Post(s)
Quoted: 73 Post(s)
Okay, first things first.
Diesel engines fire on compression. The only things required for a diesel engine to run are fuel, compression and air. Compression is #1. It looks like you have the compression part at 300 psi. Next thing is fuel. last is air. Nothing electrical involved. Diesels of this era do not have vacuum controls so missing hoses won't create a "non-start" condition.
Which style of glow plugs do you have? The small "pencil" style or the larger ones with thick metal loops interconnecting? Do you have the "gorilla knob" on the dash for the injectors?
The method for starting your car with the knob is to turn the key to the "run" position, pull the knob out to where the red engine light dims for 30 seconds and THEN pull the knob out to engage the starter.
The object on the fender well is probably the cruise control servo.
Last edited by Mike D; 05-04-2010 at 06:30 AM.
Reason: added some more useless advice