Piston failure on 2017 C300 (55,000 Miles on Odometer)

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Sehnsucht Berlin

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2017 C300 (Petrol turbo 4-cyl)
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Quick update I decided to go back to the Italians so I purchased a 2016 Maserati Gran Turismo MC Stradale
I love this car!
 
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ajlsl600

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clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
That doesn't bode well for the coming 4 cylinder C63 replacement, it may be a wound-up version of the same basic unit, but this sounds to me more like a fault with the piston, cooling maybe, rather than something inherent in the general design of the engine. 258hp is not a particularly high output for a modern 2 litre engine.

Slightly worried C300 owner.
Wot interests me is "always no 1" that indicates a cooling system design failure prob in flow rate around liner or a manufacturing defect creating a hot spot. Either way a benz issue in my view. Prob is brits /Europeans second class cits v yanks on such issues. Good luck
 
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ajlsl600

Senior Member
Joined
Nov 18, 2013
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9,083
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6,066
Location
france
Your Mercedes
clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
Quick update I decided to go back to the Italians so I purchased a 2016 Maserati Gran Turismo MC Stradale
I love this car!
Lovely looking motor that. only equal mb sl r230 in my view. But don't wear the brakes out, big bucks.
 

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