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2007 E550 no start/stalling after pulling fuse

Hey all,

New E550 owner here. I picked up the car a few days ago - low mileage 07 and drove it 800 miles without issue. This morning I noticed the windshield sprayer didnt work so I checked two fuses - a 40 amp under the hood and a 5 amp in the door panel. After replacing fuses (both were fine) and buttoning everything back up the car wouldn’t start- no cranking. Everything in the car works fine so it doesn’t appear to be a battery issue. On the advice of a few posts I saw I disconnected the neg battery terminal and reconnected after 15 minutes. Car started without issue but stalled out about 30 seconds later. It started back up, I drove it around the block and it seemed fine. Started it up again to take a short trip to the store and it stalled out going 40 mph. I coasted it to a parking lot and disconnected the cable again, hoping the trick would work again. Any ideas? Thanks for your help.

There is something else very wrong as sprayer fuses don't stall MB's.However its either fuel pressure or a lack of voltage-----how do I test,you don't a person with the diagnostics and experience with the MB starting, fuel and electrical system does

Thanks Plutoe. As an update, I was able to get it restarted after leaving battery disconnected for a while. Drove it home, left it running for a while, drove it a few more places then it shut down again on the way back from a SB party... Wonderful. I wasnt able to get it restarted this time so it's going to the local euro specialist tomorrow.