hello everyone,I got an 81 300sd,it doesn't shut off by itself,I have to stop it from the engine,I was told that the problem is the shut off valve but I couldn"t find it anywhere at least one that looks just like the one that I need,PLEASE if you have any suggentions,anything,it will be highly appreciated,thank you!

 

To troubleshoot the issue you can use the info I posted in the thread below:
https://mercedesforum.com/forum/diesel-discussions-33/fuel-shut-location-44561/

If you do not have the Electric Vacuum Pump for your door locks the leak could be in your door lock system.