I have taken to removing some of the exhaust of my 2012 GL350 to have the DPF cleaned. What I'm trying to figure out though is which part is the DPF and which part is the cat.

There is a round cylinder coming down on the right side (along firewall) with the following numbers on it KT1222 / PF0026 -- A 251 490 08 36 -- Eberspacher

After that, under the car about the middle, is the second rectangular cylinder with pipe on both sides (pic below) that has the following numbers on it SK0001 -- A 164 490 82 36 -- Eberspacher -- 23.645.31.0.00



Which one is the DPF?