As I posted short time ago, my 2008 MB E 320 Bluetec was having a engine light with codes: P0471 and P242F.
P0471 for Exhaust Pressure Sensor Range/Performance and
P242F for Diesel Particulate Filter Restriction - Ash Accumulation.
For that reason I replaced the entire DeNOx, part # 450 (not 455) in the schematic and I had fully cleaned by a certified DPF cleaner company my Particulate Filter part # 640 in the schematic.
After everything installed in my car, the installer cleaned the Engine Light and the car drove very good.
Very soon after, the engine light came on again with the same codes that it was before: P0471 and P242F.
I heard many times that the car has to be driven a couple of the times to completely clear the codes from the ECU but if it is the case, it seems like it is taken too long to clear the codes.
I am driving the car now for around 220 Miles since DPF was cleaned and the engine light still on with the codes above.
The company that cleaned the DPF had it cut on both ends and then cooked for 8 hours and then reassembled and tested. According to then the Vacuum Pressure Differential was 6+ before and it is 1+ after cleaned.
They also said that the filter itself is in good condition with not damages.
The car is running very good with a good response to the throttle and no hesitation when torque is required.
Now I still having the question about why Engine Light and codes are present if the components of the Particulate Filter were taken care.
I appreciate any information about this issue that is going on with my
E320 Bluetec 2008.
Thanks everyone.

(Sorry, my schematic file is bigger than this site allow) It is a drawing # B49222000008 from MB

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Nyck - TX - USA