Quote:
Originally Posted by stein_325i
The only issues I know of were early M178 (4.0TT) AMG engines in the E63S suffered from misfire issues, and MB bought a lot of those cars back from owners. Merc V8's tend to be very durable. Their outgoing (non-AMG) M278 (4.7TT) V8 is practically bulletproof.
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Quote:
Originally Posted by chassis
The M156, M273 and M157/M278 all have their issues. I wouldn't use the word "durable" with Mercedes V8s. Timing chains, soft cams, cylinder head bolts, swirl flaps, cylinder scuffing, oil wicking into wiring harnesses, and more.
The latest M17x had misfire problems, as noted. I would add that this engine hasn't achieved sufficient time or production volume history to make a strong statement on reliability.
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Quote:
Originally Posted by stein_325i
In my experience my uncle's 5 MB V8's have been good but as always YMMV, but he has had more non-AMG V8's (aside from one E55). Probably right that durable isn't the best word choice, although by German standards, I would still say they are better (reliability wise) than BMW's or Audi's V8's which are more problematic. BMW tends to do a lot better with their 6-cylinder engines.
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The thought of MB/AMG axing the V8 and V6 makes me sad.
Is the 3.0 V6TT (C43, C400, C450) reliable?