2008 ML320 CDI Limp Mode

[Diamlerman]

Hi all, just replaced the glow plug control unit and serpentine belt on my 2008 ML320 CDI. (vin is 4JGBBE88A55023) Now the little beast is popping out O-rings at the point shown in the attached photo and reading codes 2359-001 and 2355-002. I am using a launch CRP123 reader. I am in the process of cleaning the EGR valve to clear the 2355-002 code.

Just wondering if it is something I did or neglected to do.

[clacker]

The boost tubes are really hard to install properly, likely need a new oring and lots of lube when sliding it together, becareful what kind (no silicone) due to sensors.