500 SEL engine surging - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 07-31-2003, 11:50 AM Thread Starter
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Date registered: Jul 2003
Vehicle: 1985 mercedes 500SEL
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500 SEL engine surging

Does anyone have information as to what could be causing the following sporadic problem with my 1985 500 SEL...

Sometimes at start-up the engine surges so that I feel like I'm being jerked forward over and over.

Sometimes it happens when I'm in reverse, neutral or at a stop but never at higher speeds.

Sometimes it happens once a day sometimes several times a day. Sometimes it doesn't happen for a few days.

HELP!!! This jerking is giving me whiplash! [xx(]
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post #2 of 2 (permalink) Old 07-31-2003, 03:19 PM
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Date registered: Jun 2003
Vehicle: 86 560SEL
Location: Indiana
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I could only come up with two things. 1. You would need to check your tranny to see a...

I could only come up with two things.

1. You would need to check your tranny to see any worn gears or problem with it, especially the lower gears. Sicne you mentioned it doesn't happen at higher speed.

2. Very unlikely, your fuel pump is a little slow to deliver.

Perhaps sometimes it doesn't happen was that your gears were met with all the good sides and you had a smooth engagement. If you had a bad or worn side with a good side, it would slip and cause the car to jerk.

In any case, good luck and hope you find out what exactly went wrong and take care of it before it leads to something more serious.
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