Sorted this today - no more smoke! Car starts and idles okay, I'll be giving it a big drive tomorrow as a good test
Word of warning for W212 owners - it's considerably more tricky than W211 because there's a bracket clamped on top of the PCV which makes access to two of the three bolts very, very tricky. You
need a long, thin, flexible way of attaching an E10 torx 'through' the bracket, to gain access to the two bolts - I had to improvise and cobble together a bunch of adaptors, but was so glad that I was able to sort it and didn't have to put it all back together and go buy some more tools!
Mine took a coulple of hours as I... ahem... I removed two bolts that were unbelievably tricky to get to and remove at the back of the engine, thinking they were the ones I needed to get off to get the bracket out of the way... but they weren't... so that was an utter waste of time! I also didn't really have anything to go on for a W212, other than that pretty bad video above. It's hard to describe, sorry!
Oh and finally - a telescopic magnetic torch tool is very useful as it's very likely that you're going to drop stuff (bolts, nuts, sockets etc) into the undertray...
Cheers,
Ed
View attachment 84765 View attachment 84766 View attachment 84767 View attachment 84768 View attachment 84769
this is a sign of pcv valve?
