Diesel Particulate Filter

[j4a24]

S320 CDI L 2008 FITTED WITH DPF


OIL CHANGE AT 15000 FIRST SERVICE; SHELL HELIX 229.5 OIL WAS USED I.E. NOT LOW ASH 229.51.

MERCEDES PUT IT THROUGH DIAGNOSTICS; ASH 15%/ SOOT 77%/ BACK PRESSURE 1027 hPa.

TOLD WAS FINE AND DRIVING WOULD GET RID OF ASH/SOOT.

QUESTIONS; IS IT FINE?
ASH IS THERE FOR GOOD-RIGHT?
ASH IS NON COMBUSTIBLE-RIGHT?
SO LIFE OF FILTER REDUCED-RIGHT?
BACK PRESSURE; IS IT HIGH?
SHOULD I PUSH FOR REPLACING OF DPF AT THEIR EXPENSE?

SINCE OIL CHANGE TO 229.51 MPG FALLEN 20% ?WHY

 

[GeorgeA]

S320 CDI L 2008 FITTED WITH DPF


OIL CHANGE AT 15000 FIRST SERVICE; SHELL HELIX 229.5 OIL WAS USED I.E. NOT LOW ASH 229.51.

MERCEDES PUT IT THROUGH DIAGNOSTICS; ASH 15%/ SOOT 77%/ BACK PRESSURE 1027 hPa.

TOLD WAS FINE AND DRIVING WOULD GET RID OF ASH/SOOT.

QUESTIONS; IS IT FINE?
ASH IS THERE FOR GOOD-RIGHT?
ASH IS NON COMBUSTIBLE-RIGHT?
SO LIFE OF FILTER REDUCED-RIGHT?
BACK PRESSURE; IS IT HIGH?
SHOULD I PUSH FOR REPLACING OF DPF AT THEIR EXPENSE?

SINCE OIL CHANGE TO 229.51 MPG FALLEN 20% ?WHY

Sorry I do not know the answers to all your questions.

I also have a DPF fitted and there seems to be much confusion surrounding them. I cannot imagine any damage has been done to your vehicle, the technique to clear the filter is to run the vehicle at high revs and the resultant heat burns off the soot. Told this by my indie when a DPF fault code was recorded on my car after adding diesel additive. Not conclusive that this was the cause but it did occur soon after. I simply held the car in a lower gear and drove for 30mins up and down the motorway at 3000+ revs. This was after the indie cleared the fault code. I have had no problems since. Car ran much smoother after this also, a good thraping can do no harm every now and again.

It is anticipated that a DPF is usable for high mileages with no maintenance other than normal driving. My indie reckons to fit a new one would be fairly straight forward also, though he has never done so.

I think your main gripe should be that MB used the wrong grade oil in the first place and you should complain and have some form of compensation offered. Next oil change free perhaps!!!

HTH

 

[mercedesmisery]

I have just been told I need a new particulate filter it has no power once it gets to 3000 revs and I can only buy it off Mercedes fornearly £600 any ideas

 

[GeorgeA]

I have just been told I need a new particulate filter it has no power once it gets to 3000 revs and I can only buy it off Mercedes fornearly £600 any ideas

Who told you that a new DPF was required?
Have they tried to generate the necessary heat to clear the filter?
Do you undertake a lot of short journeys and rarely long high avg speed journeys?

You might simply need to give the car a good run and the DPF will clear itself, this is supposedly how they are designed to work.

Would be interested to know mileage and model of car also.

 

[Xtractorfan]

I would expect that the car was serviced by an MB dealer, if so, then return the vehicle immediately and insist that the car be left back to its original condition and the proper oil used, failing that I would be contacting MB uk about the quality of service..

 

[lulu]

As Xtractorfan, if it was serviced by MB main dealer, and presumambly they're also the one's telling you it need replacing, then great, new DPF supplied and fitted at their expense.

It shouldn't even be up for discussion with them.

 

[mercedesmisery]

Yes the car does alot of short trips I make local deliveries with it. I rarely go on long journeys. The MB put it on their computer and thats what they told me. Whats worrying is that there is a car exact same make,model and year as mine with same problem could it be there was a faulty batch of these filters?. I have tried high revs in low gear but it idles 45mph and I seem to be getting on peoples nerves I wonder why lol. There was even a few hand gestures I didn't recognise

 

[Rory]

Yes the car does alot of short trips I make local deliveries with it.

If you bought it new you should have been asked by the dealer what type of the use the car would undergoing and told not to buy a car with a DPF.

VAG has quietly taken cars back from taxi drivers after they found them unsuitable for use around town (ie not "fit for purpose").

 

[mercedesmisery]

What would happen if I replaced exhaust without the filter ?

 

[lulu]

What would happen if I replaced exhaust without the filter ?

This what I've wondered. Mine was bought second hand with one and I assumed it was legislation driven. Apparently not, since since it's an 'option' when ordering. It's something I'll consider if it gives me problems or the exhaust needs replacing.
I'm guessing there's probably a bit of re-programming with Star if you replace the exhaust without one. I'm sure someone will be along with correct answer shortly!

 

[television]

Here we are then as someone has come along

i As of October 2003, 4-cylinder diesel engines in combination with
engine version EURO-4 standard will be offered for the first time with
an optional diesel particulate filter, CODE 474.
The Mercedes-Benz diesel particulate filter, also called a soot filter in
the press, allows particulate emissions, which result from the
combustion of diesel fuel, to be eliminated almost completely. The
Mercedes-Benz filter operates without additives and fulfills the stringent
EURO-4 emission standards in combination with other "inner-engine"
measures.
The design of the filters consists of a ceramic honeycomb filter element
(silicone carbide) coated with a rare metal (platinum) with channels
which are opened and closed alternately at the front and rear.
The diesel particulate filter remains effective over a very long
operational period (depending on how the vehicle is driven and
therefore does not have a fixed replacement interval).
This filter represents a high-quality Mercedes-Benz genuine part, due
to, among other things, the significant quantity of platinum it contains.
In most cases, the filter can be recycled after being replaced and
therefore reused.
It is a true exchange part and can be handled using the existing
exchange process for Mercedes-Benz genuine parts.

 

[pma]

DPF my car has got one had a lot of problems with loads of white smoke when it regenerates thats about every 600 miles
read this link http://www.theaa.com/motoring_advice/fuels-and-environment/diesel-particulate-filters.html

 

[pma]

This is my car regenrateing

 

[television]

If anyone would like the complete paper all I ´need is an Email address

 

[True romance]

Guys the brother in law is looking to swap is VW passat for a C class. Now he's had loads of problems on the VW with the DPF. He does a mixture of local and long trips. Is the MB DPF still an option from new (would be 220cdi)? or would the C-class fitted with a DPF be less of an issue than the VW?

Cheers,
TR.

 

[mtdking]

I have a Citroen C5 and its DPF is a real problem which the main dealers wont admit to, main problem is going into limp home mode, I hope my E 320 cdi doesnt have one

 

[Cole@MBS]

I have a Citroen C5 and its DPF is a real problem which the main dealers wont admit to, main problem is going into limp home mode, I hope my E 320 cdi doesnt have one

Look at the tail pipes, if there black with soot, then you dont!!

 

[Cole@MBS]

Just clocked, your 2000 320cdi wont have!!

 

[Alex Crow]

MB dpf technology uses a pressure sensor to monitor the pressure differential either side of the dpf. also 2x temp sensors, one before and one after the dpf. also 1x lambda sensor mounted before the cat (ie before the dpf). if one were to remove the dpf it is fair to assume that the ecu would notice from temp sensors and pressure differential sensor that all was not well. however it may well be the case that the ecu could be given a new scn (change coding to say no dpf fitted) to run without, ask me in a couple of years!

 

[haggettd]

Any update on your DPF issue mercedesmisery, - or anyone else for that matter?