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S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

S500 wont start, been sitting 2 years :(

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Old Apr 14, 2006 | 11:12 AM
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S500 wont start, been sitting 2 years :(
hi i just got a s500 that has been sitting for 2 years ...i have added the de-winterizing to the gas also put some new gas in only 1 gallon it had half a tank then i replaced the batt. and squarted the startup-lube spray in intake..
turn the key and she starts(no weard noise)but then she dies
im thinking fuel pump or injectors .....wheres the fuel pump at on a 1995 S500 mbz?..... any ideas off hand what might be wrong ...thanks
Last edited by tf2psycho; Apr 14, 2006 at 11:37 AM.
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Old Apr 14, 2006 | 05:10 PM
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2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Originally Posted by tf2psycho
hi i just got a s500 that has been sitting for 2 years ...i have added the de-winterizing to the gas also put some new gas in only 1 gallon it had half a tank then i replaced the batt. and squarted the startup-lube spray in intake..
turn the key and she starts(no weard noise)but then she dies
im thinking fuel pump or injectors .....wheres the fuel pump at on a 1995 S500 mbz?..... any ideas off hand what might be wrong ...thanks
Gas only lasts maybe 3 months before it starts to seperate. You are doing more harm than good by pulling all that bad gas through the system. It will just gum up your system. Drain the tank, flush it if you can. Put in super Then try again. ( you will be amazed at what the stuf that comes out of your tank looks like) Its a great car treat it right

Drive on
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Old Apr 14, 2006 | 05:29 PM
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You should have done it the other way around. Leave little gas in and put a full tank of NEW gas in. Oh well, lesson learned, move on and get it fixed.
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Old Apr 14, 2006 | 06:14 PM
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is the fuel pump in the gas tank or what?
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Old Apr 15, 2006 | 01:20 AM
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Originally Posted by tf2psycho
is the fuel pump in the gas tank or what?
Fuel pump is under the car (right rear). You will see a black plastic cover held by 3 plastic nuts. You can drain the tank at the fuel pump.

BTW, you should hear the pump turn on for a few seconds everytime you switch the ignition. Have someone listen for it while you turn the key.
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Old Apr 15, 2006 | 12:08 PM
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Concur on the fuel pump, the filter and accumulator are there also. I would definitely replace them (filter and accumulator) and properly dispose of any old gas you have.
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Old Apr 17, 2006 | 05:54 PM
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You should have drained the old gas completly from the system before you did that.

At least drain the tank and the fuel lines.

I am not that familer with these cars, I'd get a FSM and start figuring out what to drain.
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Old Apr 17, 2006 | 07:41 PM
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hey
you also might wanna change that fuel filter located right next to the fuel pump, the s500's were amazing vehicles of there time, so treat them right, they will last forever..


GOOD LUCK!
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Old Apr 18, 2006 | 05:25 PM
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problem solved
thanks for all the good advise on my s500 fuel problem
i drained the tank and put fresh premium gas in .......then a MBZ mechanic from Hoehn came out to my house banged on the fuel pump and
she starts and purrs like a cat whooooah i even turned it off then back on problem fixed ........thanks again MBZ fans
and Greg from Hoehn MBZ carlsbad ca. i owe you a detail buddy
Last edited by tf2psycho; Apr 18, 2006 at 05:27 PM.
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Old Apr 19, 2006 | 12:21 AM
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1987 300SDL aka the "Money Pit"
Good to hear!

Now make sure to change the oil and all the fluids asap!

Cars hate to sit so get a few miles on her!
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Old Apr 19, 2006 | 09:41 AM
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2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Just goes to show - you can't keep a good car down......

Congrats
Drive On
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Old Apr 21, 2006 | 01:12 AM
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Bravo!
that is soo true, u can never keep a good car down..
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