Hello all, hope you are doing better than me at this time! I have been messing with my wife's 2015 ML400 rattle at startup. I changed the bank 1 intake vvt phaser etc and then code P01685 camshaft to crank implausible code popped up and I've been trying to remedy that for a month or so... Finally, I'm swallowing my pride and asking for help/ suggestions. I have opened, inspected, measured cams etc at least 6 times now, on the bright side, I can tear it down to the cams in about 1.5hours so there's that!

I have tried to research as much as I can on here before posting. I saw threads on trying to move hall wheel a few mms, didn't work for me. My hall wheel was perfectly lined up before me forcing it; no worries, have a new mb cam on the bench for install.

My main question is, Is there something I'm missing with reinstall? I have r/r phaser probably 4x now, chain tensioner out, mark links, lock down cams, reinstall, everything is lined up, button in all back up. On restart it is slow to start, like 2-3 seconds then fires off. When running it revs fine etc but throws code instantly. scanner says advance on intake cam ordered 35 degrees, actual 42. I have swapped solenoids, cam sensors between bank 2( US driver side) and it doesn't care still only p01685 on b1/Intake. Does vvt phaser need to be preloaded somehow before torquing the "valve control bolt" (also new installed) or something and if so, how? Does it need to be programmed with scanner? I'm beyond frustrated at this point. I do have another phaser and new cam to install hoping my last phaser was defective but I wanted some expert opinions before I just keep throwing parts and time at this thing and not actually fixing anything.

Also, when looking at engine, valve covers off, intake cam is centerline of engine, talking about bank 1 (US passenger side) is advanced clockwise?

this should apply to m276/m278 engines along with most other mbs as I've read its common across most engines with vvt. I do not want to bash or complain about mb engines, looking for help; when they run I love them...

Thanks for any help/ suggestions

Tim

 

If you have access to WIS, research the instructions for setting the basic timing of the cams. I just completed the job of all 4 cam adjusters along with realigning the reluctor wheel on the right intake cam. The instructions are kind of confusing, having to check positions with the crank at 40 and 53 degrees, with illustrations showing proper orientation on both ignition cycle and intake cycle(as best I can rember). If you align things in the wrong cycle, it will put it 1/2 tooth out according to WIS. Not doubting your mechanical ability, but the instructions initially confused the heck out of me.