BENZ AID - COMMON QUESTIONS AND ANSWERS

I just bought a 79 300D with 116,000 miles on it from an older gentleman. The car had been sitting for about 6mo and so I towed it home thinking it needed a battery charge or at the most new glow plugs. Well here is what I have done.... replaced glow plugs replaced glow plug relay charged battery to 100% primed fuel pump (cracked injectors til fuel came out) tried Kent's trick of putting STP/Oil mixture into the injectors ...Still nothing I am only getting a reading of 8 voltz at the glow plug fuse, the car cranks well but just won't fire. I am out of ideas....any thoughts?

In adjusting my valves on my 300D nonturbo I am perplexed with an odd occurence. After adjusting a valve to the right gap and tightening the lock nut and adjusting nut, I check the gap again and all is good. But when I use a wrench to spin the valve stem using the two nuts, which turns the valve stem and the spring assembely, the gap changes, even though the nuts are tight. It will get either tighter or looser, but if I keep spinning it it will return to my original adjustment. That is if it gets tighter, by spinning it further it will eventually loosen up.

anybody have any ideas?

My '84 380 SL stalls when it has been run a while and I come to a stop. The car generally idles at 500 rpm when the car is in gear and the engine is good and warm. This seems low to me. I think I may have a bad idle speed control unit but am hesitant to go out and buy one until I am confident that is the source of the problem. The car runs very strong otherwise. Any tips or suggestions out there would be greatly appreciated.