https://mbworld.org/forums/ 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO en Mon, 18 May 2026 03:30:38 GMT vBulletin 60 https://mbworld.org/forums/images/misc/rss.jpg https://mbworld.org/forums/ https://mbworld.org/forums/s-class-w126/927510-need-help-380sel-sputters-dies-when-warm.html Thu, 14 May 2026 19:26:08 GMT NEED AS MUCH HELP AS I CAN GET PLEASE Hey everyone, I bought a 1982 380sel a while ago and currently trying to get it running good. A little backstory on the car.. it was sitting for more than a... NEED AS MUCH HELP AS I CAN GET PLEASE

Hey everyone, I bought a 1982 380sel a while ago and currently trying to get it running good. A little backstory on the car.. it was sitting for more than a decade. I bought it from a guy trying to get it running and he replaced the fuel pump and fuel filter. And visually looks like the FD was rebuilt. I pulled off all the lines off the FD and pushed down on the plunger to verify proper operation and all ports were evenly flowing.



I went ahead and did all 8 injectors and while I was in there, I drained the tank, I flushed out all the injector lines, put new seals, etc.



I also cleaned the WUR filter screen and made sure it wasn’t clogged.



Here’s what I’m dealing with right now:



System Pressure is at 72PSI (5 Bar) which is within spec



I set the cold control pressure at 18PSI (1.2 BAR) at 50F (10C) within spec



Control pressure when warm after running/idling for 2min is at ~55PSI (3.8Bar) within spec



NOW the odd thing is when I go out on a drive down the street and get to operating temps, the car starts sputtering and dies on me while driving (seems like it leans out and dies). When it dies, I start it back up and drives fine for about a 1/4 of a mile then does the same thing again. I’m thinking that after it dies, fuel pressure drops and allows the car to run at the proper fuel mixture, then the sputter and shutdown happens again.



I pull back into my driveway right after all this is happening and hook up my pressure tester and it’s reading at 68-70 PSI (~4.7 Bar) which is wayy too high.



*Fuel pressure readings are all the same as recorded above when the return line is pulled off*



Is there any way to adjust the operating temp fuel pressure? Not sure what to do next. I’m 99% sure it’s fuel related and not ignition. Any help is appreciated thank you! ]]> S-Class (W126) Neeksg https://mbworld.org/forums/s-class-w126/927510-need-help-380sel-sputters-dies-when-warm.html https://mbworld.org/forums/s-class-w126/927509-primer-pump-leak.html Thu, 14 May 2026 18:29:29 GMT I'm replacing the primer pump. When I installed the new one there is a slow dripping leak where the pump is screwed in. I've tried several different primer pumps (I have 3 on hand). I've tried with one copper washer and two copper washers. I have tightened them fully. Every time I try, I get a drip from where the primer pump screws into the holder on the engine. What could the problem be? ]]> S-Class (W126) mozell https://mbworld.org/forums/s-class-w126/927509-primer-pump-leak.html https://mbworld.org/forums/s-class-w126/927151-draining-fuel-tank.html Mon, 04 May 2026 23:24:00 GMT I'll narrow my question in hope of getting an answer. What is the best way to drain the fuel tank? ]]> S-Class (W126) mozell https://mbworld.org/forums/s-class-w126/927151-draining-fuel-tank.html https://mbworld.org/forums/s-class-w126/927116-coming-out-long-term-storage.html Mon, 04 May 2026 01:30:54 GMT I'm setting aside my 81 240d for the time being for a variety of reasons. But, I have an 81 300sd that has been parked for about 9 years. It was running great when it was parked and about has 160000 miles. I know I need to do some things before I fire it up. Some are obvious but, can people suggest some? What's the best way to drain the fuel tank? What fluids need to be flushed or changed etc.? Thanks. ]]> S-Class (W126) mozell https://mbworld.org/forums/s-class-w126/927116-coming-out-long-term-storage.html https://mbworld.org/forums/s-class-w126/926881-84-300sd-repair-manual-wiring-diagram.html Sun, 26 Apr 2026 18:57:30 GMT When I look for the above online, most of the sites that provide this info are poorly rated for trustworthiness. I mainly need a wiring diagram for the whole electrical system but would also like to... When I look for the above online, most of the sites that provide this info are poorly rated for trustworthiness. I mainly need a wiring diagram for the whole electrical system but would also like to get a complete repair manual for the above. ]]> S-Class (W126) mozell https://mbworld.org/forums/s-class-w126/926881-84-300sd-repair-manual-wiring-diagram.html