m274

I suspect I already know the answer, but here we go... The one feature of our new C350e that I really dislike is the bloody awful noise the engine makes when running. Worse when cold but not exactly sweet sounding when warm. It also had a really nasty clatter during warmup at certain revs...

Hi, I'm trying to establish what changes were made when the M271 was superseded by the M274. I know the M274 still has a simplex timing chain, but I understand that it was changed from a roller type to another type to stop the stretching problems? I'm I correct in this, and did it work?

Having read very little about MERCEDES latest 4 cylinder petrol engines I have taken the liberty to post a couple of links about them. First is an assembly video from the Unterturkheim engine plant. [YOUTUBE HD]vgnwW1IJqIg[/YOUTUBE HD] and the second a link to a technical document on...