E-Class (W211) 2003-2009

rattling sound

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Old 08-28-2009, 06:44 AM
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Mercedes E350
rattling sound

there is rattling noise coming from my engine when the car is idling and i have 104000km/63000miles so does that mean that i have to replace timing belt or is this due to the belt tensioner. if its a belt tensioner then how much is the cost to get it replaced.
the car is 2004 mercedes E320 4matic
thank you
Old 08-28-2009, 11:33 AM
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2005 E500, 2011 ML350
Originally Posted by merc687
there is rattling noise coming from my engine when the car is idling and i have 104000km/63000miles so does that mean that i have to replace timing belt or is this due to the belt tensioner. if its a belt tensioner then how much is the cost to get it replaced.
the car is 2004 mercedes E320 4matic
thank you
Definitely NOT the timing belt considering you do not have one......
Old 08-30-2009, 12:28 AM
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2018 E400 4matic Wagon
Originally Posted by merc687
there is rattling noise coming from my engine when the car is idling and i have 104000km/63000miles so does that mean that i have to replace timing belt or is this due to the belt tensioner. if its a belt tensioner then how much is the cost to get it replaced.
the car is 2004 mercedes E320 4matic
thank you
Does it make this noise only when the AC is on? If so, you may have an AC compressor that's on its way out.

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