I recently bought a 300SDL and have been trying to find out why my glow plug won't light when I first turn the car "ON". I decided to check the fuses in the fuse box and found a loose red wire as well as what appears to have been where a wire has been cut or broke. The problem is that in my manual it does not show a wiring diagram and what should be in the fuse box. There is one bit of information that might help - there are two terminals with spade lugs attached to them in the fuse box that are separate from all the other fuses in the box. The place where the wire was cut or broke is on one of these spade lug type terminals. what do you think?