1978 240D sedan - Mercedes-Benz Forum

 
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post #1 of 8 (permalink) Old 10-04-2011, 03:53 PM Thread Starter
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1978 240D sedan

Got a 1978 240D sedan that has been running well but now the clutch is sticking to the floor occasionally (I have to lift it up with my foot) and has become very difficult if not impossible to downshift into 2nd if the car is going anything above 15-20 mph. This has been a problem for a couple weeks and seems to be getting worse. Any advice on a diagnosis? Planning on reading my Chilton tonight to get ideas.
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post #2 of 8 (permalink) Old 10-04-2011, 03:55 PM
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Generally speaking, a clutch not working properly is a symptom of a failing clutch. I hope that helps.

Felicita e un bicchiere di vino con un panino.
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post #3 of 8 (permalink) Old 10-04-2011, 04:27 PM Thread Starter
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Maybe I need to be more specific. I understand that the clutch problem represents a failing clutch. But do you think the clutch is also responsible for the inability to normally shift into 2nd while at appropriate speeds. That seems like a problem with the gears or gear selector in the tramismission? Any more specific advice?
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post #4 of 8 (permalink) Old 10-04-2011, 06:15 PM
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Quote:
Originally Posted by Bthedinger View Post
Maybe I need to be more specific. I understand that the clutch problem represents a failing clutch. But do you think the clutch is also responsible for the inability to normally shift into 2nd while at appropriate speeds. That seems like a problem with the gears or gear selector in the tramismission? Any more specific advice?
Well, yes, a worn throwout bearing would contribute to shifting difficulties. How many miles on the car and was the clutch ever serviced before?

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post #5 of 8 (permalink) Old 10-05-2011, 02:28 AM
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This might be failing clutch hydraulics. Check the clutch cylinders first.

Also the 1978 240D is a W123 which has its own subforum:

W123 E,CE,D,CD,TD,TE Class - Benzworld.org - Mercedes-Benz Discussion Forum
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post #6 of 8 (permalink) Old 10-05-2011, 06:40 PM
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Yes, check the master and slave cylinders first. Then you may have to replace the clutch. But trouble going into gear in a classic symptom of a failing clutch.

Good luck

Frank Flynn. Poet, Artist & Mystic
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post #7 of 8 (permalink) Old 10-06-2011, 12:08 AM
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But trouble going into gear in a classic symptom of a failing clutch.
It is also a symptom of failing clutch cylinders.
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post #8 of 8 (permalink) Old 10-06-2011, 12:23 AM
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I would start assuming lack of care from the PO, it seems that manual trannys cylinders are the first thing to go. I have heard that 2nd gear issue from Xo before, if I'm remembering well. PM dieselkraut. Lets make the w123 messiahs show up in oaktown

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