Whats the range of VINs that are affected by the M156 head issues?
Regards,
Joe
Checked out vehicle and it is pretty clean and minor stone chips on the hood that have been covered up with touch up paint. If price is right then I might get it despite still being on the bad list and hope for the best. Eventually getting the Weistac bolts
Someone 'splain it to me in terms like...the coolant additives somehow have been depleted at the head bolt interface and water (electrolyte) is separated from solution and attacking iron in the classic manner. There must be a chemist or metallurgist out there... Please don't make me try to research on line...
I would like failure analysis. Wouldn't you? regards , motoman
additives that are used up over time.


The Best of Mercedes & AMG


Regards,
Joe
I am in the purchasing process of a 2009 C63 and have learned of these headbolt failures. This car has 52k original miles and the seller is asking $22,500.
Is this a risky purchase?
Are there any tell tell signs of the failing headbolt before it fails?
I have seen the weistec replacement bolts.
Does anyone think that Mercedes would possibly good will this repair since its a well known failure?
I learned of the active recall on the airbags.
How common are the failures to the valves?
Thanks in advance for any input.
VIN: WDDG77XX9F26829
-Ronnie
Could you check VIN WDDGF77X79F209471
As I am struggling to find any place to find if its affected or not. Probably is but about time it starts getting tuned.


Could you check VIN WDDGF77X79F209471
As I am struggling to find any place to find if its affected or not. Probably is but about time it starts getting tuned.
Mine is November 2010 build, and I have he new bolts. I confirmed that last week when I had my cracked valve cover replaced

Short of taking the valve covers off, I think the best to go on is after engine 60658 & if it has the black plastic valve covers.


Australian Car.
And mad a mistake, car is December build. NOT November. My Apologies!
Last edited by Honro; Mar 13, 2019 at 05:18 PM. Reason: Added pic.


Australian Car.
And made a mistake, car is December build. NOT November. My Apologies!
Whist my car is Australian, why would that even matter? They are all built in Germany, so the build date & engine number on the data-card are given at the AMG Factory in Germany. Therefor the US Model year process would be the same? The only date that would change would be the "Delivery Date"??


Whist my car is Australian, why would that even matter? They are all built in Germany, so the build date & engine number on the data-card are given at the AMG Factory in Germany. Therefor the US Model year process would be the same? The only date that would change would be the "Delivery Date"??




can you check if my car is in the affected with the old head bolts ? VINWDDGF77XX9F220769







