OK this is my story: 2 round trips from SanFrisco, Ca. to Puerto Vallarta 2,000 miles one way in a 2008/144WB/2500 camper, both times returning to the border, my DPF farted cleaned itself, stinky and hot.
Next I started looking for a solution, found some one in Arizona that makes a straight pipe replacement for the Sprinter DPF, this replacement has all the fittings for the sensors etc. cost is: $500, plus a Programer/Analyzer that you can use to tell the computer to ignore the change but also allows you to change it to factory settings if you install the DPF back, Programer and software is: $700 a total of $1200.
If want info on the replacement, contact me. There is no Ultra Low diesel in Mexico and PEMEX annouced that they will not do it.
I have being in Mexico since July, driving with this change, van runs great. In a few months I will return to California change to DPF and sell this beautiful custom made RV, has 58K miles. I bought a house in Sayulita, 30 min. north of Vallarta, I plan to buy a Mexican Ford Transit van (I can not import the Sprinter cause it is German made) The Mex. Tansit is very different from the USA Transits, it is Diesel 2.2litters, front wheel drive, the interior room is smaller but acceptable for a camper and it is 30MPG, with 6 speeds manual.