Recently my 2008 Mercedes Benz E320 Bluetec issued a engine light and when scanned gave the codes: P0471 and P0242F both related to DPF restriction.
As this car had an unsuccessfully cleaned DPF I then decided to buy a new one to have it replaced. The new DPF was sold by and accredited MB auto parts store which sold a part with two numbers on it: one sticker with P# A 211 490 07 81. In the same part was also engraved P# A 211 490 30 36.
Both numbers with the MB logo and "Made in Germany" on it.
This part is connected directly to a turbo down to the exhaust pipe.
Today when the exhaust repair shop was working on it the mechanic found another accessory in line after the new DPF which seems more to be the real DPF. This accessory, similar to a "catalytic converter" has two small (6 mm) stainless tube and one sensor (?) connected to it. Also from this part is where the two exhaust pipes (muffler?) goes to the rear end of the car.
Is this accessory the real DPF or both of them work together as DPF?
When I was to buy the DPF who was installed today, I called a MB dealer parts dept. and they told me that I was buying the right part and also they said that "DPF and Catalytic converter" are the same thing on MB cars.
I know that the part installed today has a filter inside because it is very visible when looking inside.
Now I am confused if my installed part is or not the real DPF and also not knowing what part is that after the new one installed today.
Can someone help me to identify these parts and let me know if I installed the correct part to resolve my issue with the restrict DPF?
The mechanic cleared the "engine light " but it came back with the same DPF codes.
The two pictures are from the part in question, not the one installed today.

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Nyck - TX - USA