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Old 07-15-2006, 03:32 AM
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Join Date: Jul 2006
Posts: 3
Sick Of Walking

Hi, I just bought My 81" 300TD Wagon. I've Been Having Troubles keeping the Engine running On cool night and early mornings. I'm hope It some Easy to fix because I can't Find shop around here to work on it.

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Old 07-15-2006, 09:48 AM
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gimme a low-tech 240D
Join Date: Jan 2003
Location: central ky
Posts: 3,602
What are the symptoms and how many miles? Recent valve adjust and fresh fuel filters? Or are you just crabbing about rough stone cold idle performance, in which case you've just gotta get used to it.

Gotta be a diesel mechanic somewhere in your neighborhood. Surf the MB Shops Forum here for specialized MB mechanics in every state. Or ask around at the nearest truck stop mechanics shop, tractor dealership or farm/feed store. Be glad when regular automobile mechanics turn you away, they are doing you a favor. It means they dont know how to diagnose the diesel engine.

(edit: And yeah, its a good idea to rely on a professional for your first tuneup. Especially if your brand new 300TD is a complete unknown to you - then you will have established a standard basis from which you will notice if anything else goes wrong or needs maintenance after you've put another 20k miles on the car. Ask him to flush tranny fluid, differential, coolant and hydraulic systems too. And hand him the owner's manual that specifies what fluids to use if MB's aint his specialty. I nearly tossed a BMW mechanic through the window of his shop for putting the wrong tranny fluid (gear oil) in my 4-spd, but thats another story.

Last edited by 300SDog; 07-15-2006 at 10:55 AM.
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Old 07-15-2006, 01:16 PM
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Join Date: Nov 2005
Posts: 38
Ok I had a similar problem. So I replaced the radiator, and the thermostate and that seemed to fix it, but if your car is still overheating than I recommend drilling a few holes into the side of the thermostate like in dieselgiants website and that should fix your problems.
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Old 07-15-2006, 01:34 PM
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Join Date: Jul 2002
Location: S. Texas
Posts: 1,237
I found that the chief master mechanic at my local MB dealer has his own shop on the side. He charges half what the dealer charges and there are no little supprise extras like charges for rags and fluid disposal. And, best of all, he does the same quality work that the dealer does.

To find these guys start asking MB drivers. I have followed MBs for miles just to ask the driver where he gets his work done. Not only does it work but you sometimes meet some nice people.
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Old 07-16-2006, 01:51 PM
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Join Date: Jul 2006
Posts: 3
It has 175k and it previously sat for a year out side. Soon after I got It I filled the tank up, It was sitting on an empty tank.
I drove it for the next few weeks with out a Problem (February in Wisconsin). Then It Got real Cold One Week and I couldn't get it Started. Typical diesel problem I thought to my self. I let it sit for a month and a half until spring. It was still rough to start. Someone had mentioned that a shut off valve might be sticking, So I took off the solenoid? on the injection pump and looked to see if the valve was stuck. The spring loaded valve moved freely. So I put it back together, and tried to starter back up, She worked, started right up. I took it around the block for a test spin. I had absolutely no power. It took a good block to reach 25mph. Once I got it back home, I popped the hood and noticed the solenoid I took off was tightened down to its furthest downward position. The next Day I pick up a Hynes book and fuel filter for my Car find out that Is for adjusting the flow of the fuel. I adjust It for more power the max and it don't start. So I turn it back down start it up and adjust while running. That's what I have been doing for the last two tanks of fuel. So far I have replaced the fuel filter and the line and over flow lines with a clear hose so I could see air if any. I also replaced and O-ring on the hand pump. IM still unable to get all the air out of the overflow lines, the hand pump just doesn't do it. Or maybe I doing it wrong?
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Old 07-16-2006, 02:00 PM
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Join Date: Jul 2006
Posts: 3
I almost forgot. I Ohmed out the glowplugs today. All of them with a reading between 1.03 and 1.05 Ohms. I check the voltage with them on, 8.5 volt and steadily increaced to 9.5 volt. I was realy hoping that the glowplugs would be shot too.

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