W123, Electrical

85 300CD intermitent starting cylce

My 1985 300cd started acting up today. Car runs great... however today the Car did not start. I insert the key, turn the key to show glow plug lite on, wait for light to go out and then turn key. the key does not turn ( i mean it will not rotate clockwise anymore). Then i will rotate key back to off, pull key out, cycle the transmission from park to low to neutral several times. Then insert key and try again and sometimes it starts and sometimes it does not. Basically i Keep doing this procedure till it starts. After i start the car i drove the car 40 miles with no problems.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1980 300D only shift up to 3rd gear

I just bought a 1980 300d with 200k miles. It looks very well taken care off very clean and even the AC works. The problem is it will only shift the first 3 gears and will not do the last. I've been reading about checking the linkages for the Bowden cable to the transmission and throttle linkage to the injection pump,and vacuum hoses but how exactly do I calibrate or adjust the linkages? They look like they have threads to adjust but where is the right position? How is it adjusted clockwise or counter...Thank you.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1978 300D WVO Cold Startup / Ignition Setup

I just bought my first Mercedes and the previous owner bought and installed the STC 1000. I'm finally filtering WVO and ready to fill it up and was looking over all the documentation/instructions he got from you guys and one thing was a bit
disconcerting ... it says (paraphrasing):

"turn the key to the accessory position before the glow plugs turn on to let the vegetable oil heat up for a certain amount of time depending on temperature and then turning it on to let the glow plugs warm up before starting."

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

'82 240D Service/Repair Manuals

I just bought a 1982 240D and am struggling with finding a good repair manual. I don't like the CD-ROM manuals that you can find at manualsunlimited.com b/c I like to have the physical manual in hand when I'm doing a repair. I also find the Chilton's manual to be way to general and not very accurate for my '82 240D. I see that mercedessource has a bunch of manuals for sale, that cover a wide variety of 240D related topics. But I don't see one or even two that combined are a comprehensive engine and body repair guide. Can anyone recommend a good service manual (Mercedes Factory manual in print?) or manuals that would cover most major maintenance and repairs? First up for me right now is glow plugs, valve cover gasket, vacuum pump gasket and brake master cylinder.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

my 83 engine is different then my 85

I have an 85 300 CD turbo and the original engine was blown, I got a beautiful 83 engine, have it up and running, but the old engine had a 3 wire lead on the injection pump and a 3 wire lead and switch on top of the valve cover. The 83 engine has a vacuum switch on the valve cover and no electrical lead on the pump. The transmission shifts hard and I assume it is these differences that are causing this can anyone help me with?

thanks,
Phil

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

85 300 CDT no heat

Hi I have a 1985 300 CD turbo and I have no heat. So far I have taken apart the control panel and cleaned all the switches and re soldered any suspect connections, I also fixed the aux water pump so I know that is working now and I bypassed the mono valve so the water will flow through the core, but still have no heat. the fan works and I have air coming out of the defrost and outer vents, but no air at the floor. Can anyone point me in the right direction as to what is wrong with this?

Thanks,
Phil

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

84 300TD wagon transmission leak

I have a transmission leak. It seem to mainly be leaking out of the driver side (opposite the drain plug) of the pan...mainly from the center bolt back toward the rear (toward the rear of the car) bolt. It almost looks as if it's leaking out between the pan, the gasket and the seal between the gasket and tranny. I've replace the filter, the gasket and the pan.

Hopefully this wordy description can lead somebody to help me out. Thanks in advance.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

82 240d smoking bad (IMO)

I recently did a valve adjustment, hoping that the minor exhaust smoke would go away. It got worse. The engine smokes on startup, smokes really bad and runs rough until it is warm, then smokes enough to be annoying at idle. It appears to be oil smoke. I tested compression, wet and dry, and that was fine (dry-330, 340,340,335). According to previous owner's meticulous records, the engine was overhauled at 515K, am at 565K now. Any insight would be appreciated!!

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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