amr562

Hello everyone, I recently have had issues with my CLK 350 stalling on me while driving. The car didnt have any check engine light so I did some research on what I could do and signs pointed towards a crankshaft position sensor change. I swapped the sensor for an OEM part and stalling continued with no check engine light. A week later, I changed all the spark plugs and ignition coils and suddenly the car didn't stall again. The car went from stalling 2-3 times a day to driving it for a full week no problem. One day on my way back from the store I felt the car jerk a little and when I got home noticed the check engine light on. Codes pulled were P0335/P0172/P0175. Some things I have noticed are the engine idling really rough on cold start then calming down after 15 seconds, and a rotten egg smell. I did have to remove the MAF when installing the crankshaft sensor just an FYI. Hoping I can get some ideas of what steps I cant take next. Thank you!