DIY DPF (Diesel Particulate Filter) cleaning (2009 R class- OM642) - PeachParts Mercedes-Benz Forum

ROLLGUY · #1 01-24-2019, 11:03 AM

After watching several videos on DPF cleaning, I decided to give it a try. The majority of the videos did the cleaning with the DPF installed in the vehicle. Others (professional services) clean them with solvents and high pressure. I decided to do a variation of the latter. After removing the DPF from the vehicle, I poured in the cleaning solution (Liqua-Molly from our sponsor), and waited 15 minutes. I then poured in the flush solution. No liquid came out the other end until the flush solution was poured in, and even then only a little. I then used my pressure washer to force water through the DPF (from the out-flow end), thereby removing the soot from the direction it came in. The results were pretty incredible. Massive amounts of black liquid filled the collection bucket. I ran water through until it was clear. A note of caution when removing the DPF- remove the pressure sensor from it's mounting, and disconnect the wire plug, and remove the piping along with the DPF. Don't try to disconnect the piping from the DPF, and leave it there, it is removed along with the DPF.