Replace DPF

[PeteM123]

I was lucky and my DPF lasted 330k km. However it is definitely full now and even a hard regeneration (burn off) via Xentry does not clean it anymore.
Can I just install a new DPF and be done with it or do I also need to code a new zero load filter via Xentry?

 

[Mersovod]

Yes, you need to start the process of replacing the soot filter. And in addition, check all components of the DPF regeneration system.

 

[Baxarn]

I think I have the same problem. So do I need to do anything through Xentry? Can I just replace the DPF and drive again?

 

[PeteM123]

I assume that the particle content (in grams) in the DPF is determined solely by checking the pressure drop and the time the car has been running (probably adjusted for driving style - city, short distances, highway).
So now the filter is clean and the pressure drop is low. However, I was wondering if the new filter needs to be coded to 0 grams or to a new one. But it seems that nothing needs to be done in Xentry then.

 

[Mersovod]

The content in grams is a calculated value, not an absolute one. Therefore, the unit will recalculate if the other components are in good condition. To speed up the process, Xentry has an initialization procedure after replacing the DPF with a new or used one.

 

[B0bby92]

You can also clean the DPF with special chemicals and it will be as good as new.

 

[PeteM123]

As for chemical cleaning of the DPF.
It is important to have a good company or person who knows what they are doing.
Simply washing the filter in a cleaning bath and then drying it or blowing it vigorously with compressed air can either clog the DPF channels or damage the porous ceramic of the synthetic PDF and ultimately cause the DPF to fail and fail the smoke test.

That's why I first tried running a hard filter regeneration (high temperature burnout) with Xentry - in my case it was enough to extend the life of my DPF from ~230k km to ~330k km, and it didn't cost anything.
So I would first try running a Xentry DPF regeneration (not the normal automatic regeneration while driving), and if that doesn't solve the problem, I would look for a qualified company with experience in DPF cleaning.

 

[Dervo90]

If you have replaced the DPF, you will need to initialise the new filter in XENTRY as your control unit will not notice this.
I would not recommend cleaning the particulate filter at all, as it costs a lot of money, and if you spend a little more, you will have to buy a new one on the secondary market.

Why not clean it?

No matter what companies promise you, your DPF will only be partially cleaned. They can remove the soot from the DPF, but they will NEVER be able to remove the particles that are in there. Usually, the particles in the DPF are not even mentioned.

And unfortunately, at the end of the day, the DPF is a wear part of the car and at some point it needs to be replaced.
But if you do a lot of highway driving on a diesel, the DPF will last a long time. I sold my W211 with 470,000 km on it and it still had the original DPF.

 

[michettiracing2]

When replacing the DPF, a reset via the adaptations in Xentry must be performed. This ensures that the ash level and the calculated DPF fill level are processed correctly by the control unit.

 

[fabek]

My experience with cleaning the DPF is unfortunately not very positive. The DPF gets clogged very quickly.