Take the car to a Mercedes specialist not a main agent and see what they say,The DPF can easily be cleaned and the 2500 for new one is a joke if you shoparound you can buy a new one at a much cheaper price .

I agree -- As soon as he said "200% blocked", just turn away and go elsewhere!

"Once blocked beyond a certain level it is not possible to recover one"

Not quite true there are firms with TUV approval all over Germany that will clear any DPF and give a gaurantee of the work ,this service is not cheap but a darn sight cheaper than buying a new DPF.

Talked to a chap late last year who had recently invested in kit to recover HGV DPF's. Basically they are put into a chamber, heated to 600 degrees and then have compressed air blown through, takes about 12 hours for the heat up, "regen" and cool down. He did not think it would be cost effective and did not know if would work for car DPF's but was willing to try if anyone was willing to pay.

He was dismissive of all those companies robbing people by pretending to jet wash the soot out, he mentioned one that soaked the DPF with petrol and then put it in a bonfire. As he says they are breaking environmental laws by allowing toxic water into the public sewers.

I agree, such companies need prosecuting.