Headbolts or Cold Weather?
I've just had my Alternator & Oil replaced for my 2009 C63 - nothing out of the ordinary but when I went to pick it up two days ago the first start I got a Check Engine Light, and scanner shows Misfires on Cylinders 1,2,5 & Multiple/Random Misfire. [CEL Codes P0301, P0302, P0305 & P0300]
I left it down to the coils being bad, and drove it back home. However, yesterday, I went to go do an errand and the Misfire & CEL were gone, so I didn't think much of it. However, I just tried driving it today and I got a "Check Coolant Level" warning. (still no CEL)
It's been raining, and I don't have a garage, so I couldn't tell if I was leaking coolant or not, and I am starting to suspect the early signs of head bolt failure.
So I am wondering:
1) Are my head bolts going, or is it just the weather?
2) If so, how much would it cost in labor to get them replaced, as I'm struggling to find a recent estimate.
3) If so, can I keep driving it or do I run a massive risk of grenading everything?
Note : I tried to contact MB Canada & US about service history, but MB Canada refuses to give me any information outside of "work on the Cylinder" back in 2011, and MB USA has no access to the Canadian records. I assumed this was when the service bulletin was still active, and assumed the bolts were done ... probably a bad idea. I also have a third party warranty, but I doubt they'll cover head bolt replacement.
Thanks in advance!
$3000-$3500 USD for labor alone? How many hours would that equate to? Also, yeah, I've heard in the US they're quite friendly but I'm getting the "privacy" runaround even though I said I'd be fine with almost complete redaction or just telling me what was done to the car verbally. The only way I got them to tell me "cylinder work" was only because the rep's tongue slipped over the phone.




MB doesn't give it out because it contains personal info of previous owners. However most dealerships will let you look it over so you can get that good history. Call the dealer!
ETA: VMI. It's called a VMI, Vehicle Master Inquiry. Go to the dealer and see if there's any way you could take a look or have them read it if to ya.
And yeah stop driving the car wtf! Why would you keep driving it!?
Last edited by G_Money; Feb 29, 2020 at 04:35 AM.
Trending Topics
MB doesn't give it out because it contains personal info of previous owners. However most dealerships will let you look it over so you can get that good history. Call the dealer!
ETA: VMI. It's called a VMI, Vehicle Master Inquiry. Go to the dealer and see if there's any way you could take a look or have them read it if to ya.
And yeah stop driving the car wtf! Why would you keep driving it!?
The Best of Mercedes & AMG
I have another concern - can I let the car sit without turning it on for a while or should I try to get the repair done ASAP?




