Hey everyone
I have a w115 that I cannot get to run and am looking for some clues. The car ran when we bought it 9 or so years ago. Sat for a while then tried to fill with fuel and it died. I Later got it running after cleaning the fuel system out. Didn't even make it around the block Now I have fuel cell in the car. It cranks over and fires but won't run. I primed the system with an electic inline pump... Any Ideas or thoughts?

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Probably still have air in the lines. Have you cracked each injector nut and verified fuel is present when cranking? When you cleaned out the fuel system did you pull out and clean the tank strainer?

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold

In order:

#1. BAD FUEL.
#2. Glow plug circuit issue.
#3. Bypass valve stuck open or spring damage.
#4. Failed lift pump valves.
#5. Valve adjustment.
#6. Weak battery or starter = slow crank.
#7. Plugged injectors.
#8. Gummed delivery valves.

A video would help diagnosis.

.

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Thanks for all the advice, as of right now i am getting fuel to all cylinders but the first one. It acts like it wants to start. How do i use the hand primer?

If it's the old style one (white IIRC), you unscrew it and then start pumping. If it's been changed to the newer style (black IIRC) then you don't have to unscrew it. Pump it until it gets noticeably more difficult to push and then try starting.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.