Turbo oil in the exhaust?

Hello my name is Lou, Mercedes tech and YouTuber. I see you are having some troubles with the CLA45. I would like to ask a few questions if I may? Like was this an oem thermostat? Like from the dealer? As we find that any aftermarket or even the same brand thermostat but comes from outside the dealer does not work as efficiently as an oem one. So that can be an issue. As for the oil, I would recommend replacing the crankcase vent line assembly due to the codes, also that can cause oil loss into the intake tract. As for your Turbo and the oil that we seen, is there any play in the impeller? Actually I just rechecked the google drive and seen the play, that is not good at all, its like its missing an clip to hold it in place. By that video, the turbo will need replaced if it cant be serviced by the company you got it from, that can and will cause the low boost code because you will have boost loss from it not closing properly and also moving out of the way and allowing boost to bypass the valve. Let me know your thoughts, Lou Palomino
Master tech Lou YouTube

Hey Lou, long time, thanks for chiming in ;)

Thanks for the additional info Jeremy, I do believe an oem thermostat will take car of that for you :)
as for the oil, , take my info with a grain of salt because I am no engineer I am just going off my experience but you will find oil in any intake of any engine, because all of the vapors from the crankcase will eventually condense and build up. You just have easier access to seeing it in the turbo pipes. Usually its "after" the crankcase lines, meaning oil is not present BEFORE the lines where they attach to the intake stream but AFTER. So its normal to an extent to find oil in the intake tract on turbo cars, yes there is a point to were its an issue which can usually be tied back to the crankcase venting system. On your engine you have that big ol Spiderman looking line setup and tank that bolts under the thermostat on the back of the engine (if memory serves) so you'll need to replace that whole setup and yes I suggest from Mercedes dealer. It will be priceir than online and such but as long as you get an oem Mercedes part it will work and last. They were all updated on almost every engine, it was a bad design with lots of issues and updates. Let me know if any of this helps. Thank you sir. Lou
photo attached that shows the pcv solenoid and the line assembly.