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.

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.

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:dizzy2:

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.

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.

Its probably a vacuum leak, or an electrical problem. I'd consult the FSM, time to buy the DVD set for the W140!:D