W123

only defrost works, no bi-level/hi/lo

on the '78 300D I just picked up, only the defrost works. The mix/hi/low do not work. Anything I should be checking for? I would really like to have at least low to work as well so I don't always have to blast the defrost (loud) when I need heat. comments/suggestions?

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W123

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Dead 81 300D - No Start

Haven't had time to troubleshoot this, but I thought I'd throw out the symptoms to keep me away from any dead ends. 1981 300D, 200K: 1. Started and drove car twice in AM yesterday. 2. Sat for 3.5 hrs and then was completely dead- no starter action, no lights, interior lights work, some dash indications, all dying when cranking attempted. Chattering coming from glow plug relay. 3. Given the totality and suddenness of these symptoms, I'm wondering about a short that just happened during this short interval of rest. 4. Tried jumpering - no response, and the cables got warm at the source vehicle.

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W123

What's normal MPG on '77 300D?

I have a 1977 300D (5 cylinder diesel) with 163,000. Considering I replaced air filter and both fuel filters, Whats a good MPG for this car? I get about 13mpg right now, and it seems suspicious. Help anybody?

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W123

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617 Turbo Diesel EGR Thermal Valve

1981 to 1985 Turbo 300D 300CD 300TD and 300SD

'82 300TD lacking power at midrange and up.

Well here is the quick version of the story. I'm the second owner of this vehicle. Have owned it since '94. Have always had her maintained on schedule. She currently has 346K miles on her. The compression is very good. She has always started up easily and quickly. Lately, (and it could be biodiesel related) she seems to lack power at freeway speeds (uphill and passing) especially noticeable at altitude...more than in the past. I have changed fuel filters recently but perhaps need to again. Just changed the injectors and she idles smoother when cold...but shakes somewhat when warm at idle. Have replaced rack damper bolt. btw, it appears my primer pump leaks a little when pumping...can that be a source for an air leak??

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W123

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$32.50

1970s Chassis Alternator Mounted Voltage Regulator

Fits Early Pre 1980 Models -Direct replacement for rectangular box regulator

1981 240D Turn Signal Out

I have a 81' 240D and my turn signals have gone out all of a sudden and the fuse looked fine but i replaced it anyway. Is there a common secondary reason that they would go out (relay? where?) I'd appreciate any insight anyone may have. Thanks, Drew

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W123

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1977 300D Loss of power while going uphill

I've heard that 77 300D is not a strong car to begin with, but mine actually slows down and barely makes it up the standard Washington state hills. At the bottom of a hill I could be going 40mph, and by the time I get to the top it slows down to as slow as 25mph!! So far I replaced both fuel filters, air filter, checked compression, compression is right about 330 PSI in all 5 cylinders, which as I understand is pretty good for this engine (or is it?). What else should I check or do to fix this? Any help or ideas would be appreciated. Roman

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W123

Hydraulic leveling pump leaking

I have an '83 300TD and the hydraulic leveling pump is leaking. It looks like it's coming from between the two halves of the pump. Does anybody know if there is an o-ring or some seal I can replace inside the pump?

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