W123, Factory Books and Manuals

Changed motor and transmission mounts (Much less vibration!), but clunks when downshifting.

Purchased a new to me '82 300D Turbo diesel with 99K miles. Somebody really loved this car. It's very much like new. However, soon after I purchased the car, I noticed a great deal of vibration coming through the steering wheel and some in the seat of the pants. Changed out the two front motor mounts. Passenger side was collapsed, despite looking "ok" from the fender. Driver side was mush as the primer pump leaked on it and destroyed the rubber. The rear transmission mount was changed. Oddly enough, the wrong transmission mount was previously installed.

Chassis Model Number

W123

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Diesel Engine Specific Aid

'85 300TD charging system

Hello, I suspect I have a charging deficiency in my '85 300TD(230K miles). To-date I have replaced the brushes/regulator, belts, replaced dash light and cleaned bulb holder. Voltmeter testing at the battery shows 12.5 vdc at idle, 13.5 vdc at 3-4K rpm. The dash light will not light at all, but shows continuity from the multi-pin connector across the bulb circuit with holder in place. As far as symptoms go: I occasionally (once every six months or year) find that the battery is low and will not turn the starter. The climate control system does not react to any setting less than full on or full off and the heater motor takes a few minutes of driving to start blowing.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

diesel oil requirements in the 1980s

hey guys received my manuals the other day. well written and helpful. i guess i got lucky with my 240d buying it with limited MB knowledge. i do have a question as to what types of oil was mercedes requireing for oil changed in the early 1980s. my owners manual states that the car had regular maintanece (it shows 73k on the odometer but is has quit working) the oil changes were performed with castrol 20w 50 not exactly a diesel motor oil. these were done at authorized service ceneters . was this the best choice for oil back then? could this be the reason i have a lot of crank case pressure on an engine with less than 100k?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

81 240D 3 Water Pumps In 6 Months

Hi--- I have an '81 240D fitted with the 2-tank Greasecar system. Don't do too much of my own work, but I'm using the 75 MPH Guide to keep Anna happy and healthy. So far, so good... but, I've gone through 3 water pumps in less than 10,000 miles. The 1st was the original, so I new that would happen. And it did at exactly 120,000. Had it replaced with a Bosch, which promptly failed. Had it replaced again with a German pump, the name eludes me. Well, this pump also failed and I'm having it replaced with a Mercedes pump. Fortunately, this is all warranty work.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

300TD window help

hey there...i have an 85 300td wagon...the front driver side window is inoperable...i tried replacing the switch...no change...the motor in the door makes the usual noise when i use the switch but the window doesn't move...i am assuming it is the regulator...could it be the regulator AND the motor???...any wisdom is appreciated...

Forums

Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

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