Vacuum or Related Difficulities 1980 300CD - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 05-03-2009, 07:44 AM Thread Starter
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Date registered: May 2009
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Vacuum or Related Difficulities 1980 300CD

Sorry, I posted this incorrectly yesterday.

1980 300CD

I believe I have a vacuum or related problem.
Incident occurred while driving Interstate 5 in California for 8 hours, just continuous freeway driving.
All existing symptoms occurred together, with no previous problem in any of the systems.

1.The diesel will not turn off as normal with the ignition key. Only manually with the emergency shut off lever on the engine throttle assembly.
2.The automatic transmission will not shift automatically while accelerating from a stopped position. It stays in low gear until forced into the next and next gear. After that it operates normally until reduced speed causes downshift or coming to a stop and start accelerating again.
3.The braking system seems difficult. It is necessary to press the brake pedal really hard to stop the car. It is very difficult to stop in the normal stopping distance.

Other systems work normally, but I do not know if they are vacuum controlled such as the windshield wipers, door windows, heater and fan systems.

I would appreciate anyone's assistance. Thanks. John
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