W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

'81 300SD Turbo Diesel - Trans slow in engaging reverse.

I have an '81, 300SD, that sat in a field for 2 years due to leaking engine oil cooler lines. Replaced lines, checked all fluids, started and ran, and then took it for first test drive. Noticed it was slow going into reverse. Have zero (0) power to power-brake booster. Figured vacuum pump needs to be either replaced or rebuilt. As I checked the transmission fluid, with the engine running and the transmission in park, when I checked the fluid it seems to be over-full. Previous owner was adding Dextron/Mercon trans fluid. As I put it into reverse it is taking longer and longer each time for the reverse to engage. Are the above my problems, ie: vacuum, wrong trans fluid, improper checking technique, or is the transmission going south?

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Body and Interior 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

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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

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Body and Interior Specific Aid

84 300SD transmission governor screens

I would like to check and clean the governor screens in my 84 300SD transmission, but have no idea how to go about doing it. I think they can be accessed near the filter, but don't know anything about transmissions. Any suggestions? Are there any books or manuals available to teach me how these transmissions work and how they can be serviced and repaired?

Thanks for your help - Steven

Chassis Model Number

W126

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Diesel Engine 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

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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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