haggettd
Senior Member
- Joined
- Aug 25, 2009
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- Location
- Nuneaton
- Your Mercedes
- C220 CDi Avangarde Estate
Interesting to me and any other owners with DPFs
Follow up to previous thread regarding DPF Star check.
Well.
The chaps ran a star test and came up with the following results:-
Code 2621-002 Ash content of diesel particulate filter TOO HIGH
Fault counter 3
Kilometer reading 8698 -- 11420
Engine speed 1460 -- 1540
Last regeneration - -- -
Ash content of DPF - -- -
Resistor - -- -
Current Injected quantity 0.00 -- 19.20
Info Dev Status 12.0 -- 12.0
Exhaust temp down stream of TWC 385 -- 285
Exhaust gas volume flow rate 180 -- 100 m3/h
Differential pressure 89.5 -- 44.5 hPa
Resistor 11.2 -- 9.6
So, I don't know how these figures relate to a DPF that's new or within limits - maybe someone could explain some of the above.
The bottom line though is that the DPF's over the ash limit so I have requested that it should be replaced under warranty considering I have had the car only 4 weeks and it was purchased from MB direct with a 12month warranty.
Am I correct that a forced regen would only lower soot levels and not Ash content?
Do you think there is a chance they would have any argument against this on the grounds that it's a 'consumable item'? I hope not cos it's £650 plus labour.
This news backs up my suspicions that the economy is lower than it should be and that I believe that it's trying its best to regenerate every 70 miles or so.
I have not bettered 40.2 mpg (calculated tank to tank) driving like miss Marple on my 140 mile daily 65mph motorway commute. I would expect 45mpg at least.
Hopefully with a new, clear DPF this should improve somewhat. I'll keep you posted.
It does highlight the importance of using the correct spec Low Ash oil when you have a DPF fitted. I suspect that the incorrect oil may have been used in the past (Castrol SLXII Longlife) - can't seem to find what MB spec that is - Anyone know?
The car is a 220CDi 05 with 69000 miles Auto Estate BTW.
I'll update this thread with further news.......thanks for reading.
Follow up to previous thread regarding DPF Star check.
Well.
The chaps ran a star test and came up with the following results:-
Code 2621-002 Ash content of diesel particulate filter TOO HIGH
Fault counter 3
Kilometer reading 8698 -- 11420
Engine speed 1460 -- 1540
Last regeneration - -- -
Ash content of DPF - -- -
Resistor - -- -
Current Injected quantity 0.00 -- 19.20
Info Dev Status 12.0 -- 12.0
Exhaust temp down stream of TWC 385 -- 285
Exhaust gas volume flow rate 180 -- 100 m3/h
Differential pressure 89.5 -- 44.5 hPa
Resistor 11.2 -- 9.6
So, I don't know how these figures relate to a DPF that's new or within limits - maybe someone could explain some of the above.
The bottom line though is that the DPF's over the ash limit so I have requested that it should be replaced under warranty considering I have had the car only 4 weeks and it was purchased from MB direct with a 12month warranty.
Am I correct that a forced regen would only lower soot levels and not Ash content?
Do you think there is a chance they would have any argument against this on the grounds that it's a 'consumable item'? I hope not cos it's £650 plus labour.
This news backs up my suspicions that the economy is lower than it should be and that I believe that it's trying its best to regenerate every 70 miles or so.
I have not bettered 40.2 mpg (calculated tank to tank) driving like miss Marple on my 140 mile daily 65mph motorway commute. I would expect 45mpg at least.
Hopefully with a new, clear DPF this should improve somewhat. I'll keep you posted.
It does highlight the importance of using the correct spec Low Ash oil when you have a DPF fitted. I suspect that the incorrect oil may have been used in the past (Castrol SLXII Longlife) - can't seem to find what MB spec that is - Anyone know?
The car is a 220CDi 05 with 69000 miles Auto Estate BTW.
I'll update this thread with further news.......thanks for reading.