S K

Recently bought a 2011 Mercedes Benz E350 with the m272, I absolutely love the car but it has some issues.

When I got the car on first start it had rough jumping idle, it would shudder when accelerating and when steady at speed the rpm would still jump up and down a bit.

scanned the car and got the following codes; P052B, P0172, and P0175. Cleared the codes and let the car sit for 2 days.

Took it home about 40km and scanned the car again and got P0128, P052B, P0012, P0172, and P0175 so I ordered and replaced the cam magnet on the intake bank which was showing fault.

Cleared codes again and test drove the car with much better idle than before for sure, and much better acceleration but there was still that slight shudder/viberation. Again I scanned the car and now got P0128, P0172, and P0175.

If someone with more knowledge and experience with these cars/engine could help guide me in the direction as to what to look for and look into that would be much appreciated

Edited: can the P0128 code somehow have something to do with my rich condition? The code was not present when I checked the car at first but after a lengthy drive it is, my temp guage shows normal? It’s above 80c (towards hot) not dead centre nor tad bit towards cold like my other cars

konigstiger

P0128 = thermostat, P0172 & P0175 = MAF

S K

hey thanks for the reply, I just realized that the big air intake that site on top of the engine, the part that seats on too of the maf is missing the air inlet duct clip, I hope this is causing my issue.

R350Long

Hi, did you manage to get these codes away? Was it the MAF issue or something else? I am fighting these 2 codes (p0172 p0175) myself currently with 2006 W164 M272.

S K

Hey man, I ended up selling the car a while ago, but here's the few things I did;

My shudder was caused by bad axles, the lean conditions now I don't remember what exactly I did but I did change the cam magnet only the one the code was on for and I changed the maf but I don't think my maf was really the problem.

I had these codes very recently on my dodge charger and it was due to an exhaust leak, however I would put my money on a vacuum leak in your system or an exhaust leak before the bank 1 and 2 sensor 2, make sure your Airbag is on right right that there is no clamps loose or undone, check to see if any vacuum lines are torn, and finally you can also try and clean the maf sensor using a maf sensor or electrical parts cleaner