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#1
07-01-2009, 09:49 PM
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No start on the SL... No Fuel
After sitting for 10 days or so on 1/4 tank, the 500SL won't start. I know, I know, always leave your tank full, but I didn't this time. It drove perfectly before.
I has plenty of crank, with a good battery and fresh starter, but not even a hint of ignition. Last fall, I had a few instances where it seemed that fuel quit flowing and the car decelerated and died. It acted like it was right now, then all of the sudden, LIFE. I took the air cleaner off and saw nothing blaring. I'm going to put in 5 gallons of premium and see if that makes a difference. I keep track of mileage along with fuel, and it seems like I have enough. I'm wondering if I'm having an electrical problem with the EFI or my fuel pump is acting up. Anyone had similar symptoms and solutions?
__________________
1985 500SL Euro w/ AMG bits 130k  1984 300SD Turbodiesel 192k  1980 240D Stick China 188k  2001 CLK55 AMG 101k  2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!! 
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#2
07-01-2009, 09:58 PM
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Classic Fuel pump relay.
__________________
Question Authority before it Questions you.
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#3
07-01-2009, 10:05 PM
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Location? What does it look like?
__________________
1985 500SL Euro w/ AMG bits 130k 1984 300SD Turbodiesel 192k 1980 240D Stick China 188k 2001 CLK55 AMG 101k 2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
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#4
07-01-2009, 11:00 PM
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You should be able to tell if it is the fuel pump relay, can you hear the pump run momentarily when you turn the key to run prior to cranking? If not, relay or the pump itself.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#5
07-02-2009, 03:57 PM
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Got it running today, and its acting normal.
I went back to the fuel pump, and gave it a few taps and jiggles. The car fired on the first crank. I'm not sure if my fuel pump is on the way out or I have a loose connection somewhere. Everything did look tight back there, though. I can get a new Bosch fuel pump from my source for $180, so I'm about going with that since its original. I don't want it to stick again and strand me somewhere.
__________________
1985 500SL Euro w/ AMG bits 130k 1984 300SD Turbodiesel 192k 1980 240D Stick China 188k 2001 CLK55 AMG 101k 2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!
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#6
07-02-2009, 04:07 PM
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I'd replace it, if it is sticking it will happen again....
__________________
-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#7
07-02-2009, 04:19 PM
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... and probably when you're not at home!
You may find the car runs better all around with the new fuel pump... the old one might not have been providing good pressures anymore. -J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket  Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E.
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