Catalytic Converter or Diesel Particulate Filter? - PeachParts Mercedes-Benz Forum

jay_bob · #1 04-12-2020, 12:19 PM

Pull the triangle resonance pod off (3 bolts, pull up) to get a lot better view of the back of the mixing chamber.

engatwork · #2 04-12-2020, 03:35 PM

Drop what MB calls the DPF where exhaust is opened up, reset code and take it around the block.

ROLLGUY · #3 04-20-2020, 11:16 PM

Quote:

Originally Posted by jay_bob

Pull the triangle resonance pod off (3 bolts, pull up) to get a lot better view of the back of the mixing chamber.

I did just that, and no sensor in the back of the mixing chamber. There has to be something else leaking boost.

ROLLGUY · #4 04-24-2020, 02:50 PM

Quote:
Originally Posted by jay_bob

Pull the triangle resonance pod off (3 bolts, pull up) to get a lot better view of the back of the mixing chamber.

Quote:

Originally Posted by ROLLGUY

I did just that, and no sensor in the back of the mixing chamber. There has to be something else leaking boost.

I had another look at this today. I removed the snap ring from the turbo actuator so I could manually give it boost while a friend revved up the engine. Sure enough, there was a huge boost leak around the boost hose connection to the mixing chamber. I removed the air intake hose to get a better look, and you guessed it- the temp sensor was behind dangling by the wire. I plugged it back in, and now the car drives like a greased cheetah chasing a bullet train (well not quite, but close). Evidently this engine is a little different than the E class, in that the sensor is not inside the mixing chamber and can be seen by removing the resonance pod. It seems that I did not have to replace the boost sensor, or clean the DPF after all. Thanks jay_bob for leading me in the right direction.....Rich