E550C won't start after refueling
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2010 E550 Coupe
E550C won't start after refueling
I have had trouble with my 2010 E550C starting after refueling. This has happened several times now but at random times. Maybe once every 5 to 10 times after refueling. If you wait for 20 minutes it starts up just fine after initially sputtering some. I have had no luck starting the car in less than 20 minutes after refueling. I live in California so it's not related to cold weather. The dealer has not been able to figure out why this is happening. Any ideas.
Last edited by onnebroek; Mar 18, 2015 at 11:44 PM.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
I have had trouble with my 2010 E550C starting after refueling. This has happened several times now but at random times. Maybe once every 5 to 10 times after refueling. If you wait for 20 minutes it starts up just fine after initially sputtering some. I have had no luck starting the car in less than 20 minutes after refueling. I live in California so it's not related to cold weather. The dealer has not been able to figure out why this is happening. Any ideas.
Thread Starter
Newbie
Joined: Oct 2009
Posts: 4
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2010 E550 Coupe
It cranks fine but does not appear to get any fuel. After letting it sit for a while 15 plus minutes it sputters a bit and then eventually fires up. Trying to start it within the first ten minutes it just won't do anything at Ll but happily crank.
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Joined: Jul 2013
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From: Cedar Rapids, IA
2009 e550 4Matic
go to the end of the fuel rail and see if you get water or gas. If your putting in gas from the same station every time, they might quite possibly have water in there fuel. Water will always sink to the bottom of the tank. And it will give a similar situation. Or, toss a bottle of heat (little yellow bottle) in the tank and see if it helps.
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Joined: Oct 2010
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Could be the pump heating up and not working at the correct pressure but allowing the engine run when it first starts up with the cool fuel pump.
This could be the reason as you say after 20 min wait it starts up, i.e. The fuel pump cools down and gives the needed pressure for proper fuel delivery in the engine. I would not think fuel pressure regulator would act like this but worth checking anyway.
Has your gas mileage gone down while having this issue? Too low fuel rail pressure would cause worse numbers.
Water in fuel does not really fit here as with the 20 min wait even more water would settle in the bottom of the tank and things should get worse, not better.
Last edited by Arrie; Mar 23, 2015 at 09:35 AM.
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MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
