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  #1  
Old 02-03-2007, 03:20 AM
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S420 sometimes stalls when going in reverse

Its happened twice, today being the second time. Ill be reversing out of a parking spot and it will shake a little and shut off.

it will start back up without any hesitation, no dummy lights lit up. The last time it happen was in the same situation, backing out of a parking spot. Probably a week ago.

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Old 02-03-2007, 06:05 PM
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could be a lot of things, can you give more data to your problem? check on your vacuum lines, reverse cable adjustment, transmission modulating valve pressure reading etc.
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Old 02-05-2007, 02:14 AM
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Sorry im new to this car so im pretty clueless with all that. What vacuum lines should i check? i have a mighty vac.

Reverse cable, where is the location and how do i adjust it?

transmission modulating valve?

This is all new to me
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Old 02-05-2007, 02:01 PM
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I had a car short the ignition with the back up light switch in the transmission. A weaker battery after a start , could drop below min. voltage for the ignition to operate. Try it with the back switch disconnected.
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  #5  
Old 02-06-2007, 12:39 AM
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Yeah, when my MB was stalling in the summer and I asked this, the list was about a mile long on what it "could" be and mine is a 1985. Wouldn't think it would be that complex, but it obviously is. I have been given new info here on some things I should try.

Good luck to you.

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Originally Posted by cool View Post
could be a lot of things, can you give more data to your problem? check on your vacuum lines, reverse cable adjustment, transmission modulating valve pressure reading etc.
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  #6  
Old 02-06-2007, 11:12 AM
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Its probably a vacuum leak, or an electrical problem. I'd consult the FSM, time to buy the DVD set for the W140!

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