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2010 e550 knocking noise upon acceleration

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2010 e550 knocking noise upon acceleration

 
Old 01-11-2017, 11:54 PM
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2010 Mercedes Benz e550 sport
2010 e550 knocking noise upon acceleration

It seems like whenever I am at a stop and accelerate, it starts knocking sporadically then stops when I get to a higher speed (or maybe i just can't hear it anymore) and it happens almost every time I accelerate after a stop up an incline. Almost sounds as if someone is rolling around in there..my husband noticed that my bearing sounds like it may need to be replaced. Any help?? Thanks!
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Old 01-12-2017, 01:15 AM
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2006 E55, 2005 C55, 2005 E320 Estate Sport, 2015 ML350
Pinging? Make sure you are using top tier premium fuel.
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Old 01-12-2017, 11:45 AM
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Ive had the car for about 2 months and have used premium gas all but probably twice, and not recent. I tried to listen as much as I could this morning but its not really a ping..more of a tap or soft knock coming from right around drivers side in the front.
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Old 01-12-2017, 12:06 PM
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Well pinging doesn't actually sound like a ping it's more like a bouncing marble kind of sound. How many miles? Do you always use the same gas station? If you do I would recommend a different one. And add a bottle of the chevron techron fuel treatment to the tank and see how that goes.
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Old 01-12-2017, 12:38 PM
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A bouncing marble is a good way to describe it. It has right under 43000. I use Mobile primarily and Chevron here and there. I will try the fuel treatment though!
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Old 01-12-2017, 12:39 PM
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Yes and it's typically only heard at about medium throttle at a lower rpm in multiple gears.
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