BENZ AID - COMMON QUESTIONS AND ANSWERS

1987 300 sdl - odd starting problem

i am having odd start up/running syptoms. car starts and runs perfect when cold. after warm up, requires 2-3 starting attempts. intermittently will not take fuel after warm start (especially if i continue cranking on first attempt until firing - usually no more than 10 seconds). fuel filters have been changed, diesel purge performed (actually looked pretty clean). car has 241,000 miles and looks to have been pretty well maintained. timing chain is tight.

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Engine won't start

I bought a '81 300D and it would start easily through the fall, when it started to get cold (25-32 deg F) it was still starting. I went out and tried to start it when the temp had dropped into the 20's and I have not been able to start it since (even now that it is summer time). I have checked the glow plugs, I replaced the priming pump and fuel filter. I have loosened the fuel lines at the injectors and I am not getting much fuel squirting out when I crank the engine.

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Overheating 93 300d 2.5

Mmmmm so my 300d 2.5 with 176k miles started to overheat at the beginning of the summer. I replaced a worn out fan clutch which fixed the issue for a few months. However now it's starting to run hot again, even worse if I run the a/c or drive hard. I have a thermostat to install however are the water pumps known for going out or the radiators for clogging? Car has no coolant leak. No other driveability issues runs great idle is perfect.

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1985 300TD Fuse 14 blowing

Fuse #14 keeps blowing. Here are the electrical issues I've noticed:

1. The car will only start in neutral.
2. The glow plug buzzer does not go on (but the glow plug light works).
3. After the buzzer stops working the AC blows hot only.

Fuse #14 certainly could impact the AC because according to the fuse diagram it controls "control unit/water pump/heating water valve for climate control system.....". But what about the neutral safety switch and the glow plug buzzer?

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Taxonomy upgrade extras

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Poor MPG on 86 300 SDL

Since buying the car in 2004 I've always gotten 24-28 MPG city/highway/air on/air off. She's always be a quick start after I replaced the glow plugs in 2004. She charges down the highway as smooth as silk. A great traveling car.

The car sat idle last year while I was overseas. Since getting back home MPG has dropped to 10. No kidding, 10 MPG. I have changed all filters; air/ both fuel and oil. The car starts right up, idles nice, no smoke, no sputtering or hesitation while running or starting.

I've checked and replaced bad vacuum connections in the engine compartment. I have added diesel fuel additives in the tank, with no positive effect.

I've ordered the purge kit and will try that when it arrives.

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