Gone from a Purr to a slight growl ?

Scooby_Doo

MB Enthusiast
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Apr 14, 2013
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1,166
Location
Carmarthen
Car
W205 C250d 4matic
Or is it my imagination ?
My C250d has covered just over 10,000 miles and on the way back from a "sprightly" 150 mile run I'm sure I noticed a slight misfire from the engine , now since then the engine note has gone from a purr to a more growly note on acceleration. I've also notice that the revs will blip up slightly ( 100 rpm) on occasion , when taking my foot off the brake at a standstill. Any views or am I imagining it.
Will probably take it in to MB when I can arrange it.
 

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